chore: add vex config + redesign mockups, ignore debug scratch

Commit the shared vex code-search config (.vex.toml) and the UI redesign
mockups under design/. Add the throwaway debugging dumps (_dump*.ps1,
_pages*.txt) to .gitignore so they stay local.

.editorconfig

@@ -0,0 +1,60 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = crlf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{cs,csx}]
+indent_style = space
+indent_size = 4
+
+# C# formatting rules
+dotnet_sort_system_directives_first = true
+dotnet_separate_import_directive_groups = false
+
+# Expression preferences
+csharp_prefer_simple_using_statement = true:suggestion
+csharp_prefer_braces = true:silent
+csharp_style_namespace_declarations = file_scoped:warning
+csharp_using_directive_placement = outside_namespace:warning
+
+# var preferences
+csharp_style_var_for_built_in_types = false:suggestion
+csharp_style_var_when_type_is_apparent = true:suggestion
+csharp_style_var_elsewhere = false:suggestion
+
+# Expression-bodied members
+csharp_style_expression_bodied_methods = false:silent
+csharp_style_expression_bodied_constructors = false:silent
+csharp_style_expression_bodied_properties = true:suggestion
+
+# Null checking preferences
+csharp_style_throw_expression = true:suggestion
+csharp_style_conditional_delegate_call = true:suggestion
+
+# Modifier ordering
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:warning
+
+# Naming conventions
+dotnet_naming_rule.private_fields_should_be_underscore_camel_case.severity = suggestion
+dotnet_naming_rule.private_fields_should_be_underscore_camel_case.symbols = private_fields
+dotnet_naming_rule.private_fields_should_be_underscore_camel_case.style = underscore_camel_case_style
+
+dotnet_naming_symbols.private_fields.applicable_kinds = field
+dotnet_naming_symbols.private_fields.applicable_accessibilities = private, protected, private_protected
+
+dotnet_naming_style.underscore_camel_case_style.required_prefix = _
+dotnet_naming_style.underscore_camel_case_style.capitalization = camel_case
+
+[*.{xml,csproj,props,targets}]
+indent_style = space
+indent_size = 2
+
+[*.{json,yml,yaml}]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false

.gitignore

@@ -81,3 +81,10 @@ appsettings.*.local.json
 
 # Scraping fixtures captured during Phase 0 spike (kept locally, not in repo)
 spike/captures/
+
+# Claude Code per-session task metadata (local only)
+.claude/
+
+# Throwaway debugging scratch (PowerShell dumps, raw page captures)
+_dump*.ps1
+_pages*.txt

.vex.toml

@@ -0,0 +1,57 @@
+# vex configuration — https://github.com/tenatarika/vex
+#
+# Place this file in your project root as .vex.toml
+
+# Glob patterns to exclude from indexing (gitignore syntax, on top of .gitignore)
+# exclude = [
+#     "vendor/**",
+#     "node_modules/**",
+#     "*.generated.go",
+#     "dist/**",
+# ]
+
+# Default output format: "text", "json", or "compact"
+# format = "text"
+
+# Enable semantic embeddings by default (slower indexing, enables meaning-based search)
+semantic = true
+
+# Automatically run `vex update` before search if the index is stale
+auto_update = true
+
+# Embedder used for semantic indexing. Known IDs: minilm-l6-v2 (default).
+# Changing the embedder requires a full reindex.
+# embedder = "minilm-l6-v2"
+
+# Cache directory override. Defaults to the platform cache location.
+#   macOS:   ~/Library/Caches/vex
+#   Linux:   $XDG_CACHE_HOME/vex   (fallback: ~/.cache/vex)
+#   Windows: %LOCALAPPDATA%\vex    (fallback: %USERPROFILE%\AppData\Local\vex)
+# Accepts absolute paths, "~/..." or paths relative to this file (e.g. "./.vex/cache").
+# Can also be overridden per-invocation with --cache-dir or $VEX_CACHE_DIR.
+# cache_dir = "./.vex/cache"
+
+# Store the index inside the project as `<project>/.vex_cache/`. Useful when
+# the cache should travel with the project (e.g. on a moved or renamed
+# directory). vex writes a `.gitignore` inside it so contents are not
+# committed. Overridden by `cache_dir`, `--cache-dir`, or $VEX_CACHE_DIR.
+# local_cache = false
+
+# Thread count for parallel indexing (index/update/watch).
+#   * unset  — 80% of available cores, rounded up (default, leaves headroom)
+#   * 0      — use all cores (explicit opt-in to max throughput)
+#   * N      — exactly N workers
+# Overridable per-invocation with `-j/--jobs` or $VEX_JOBS.
+# jobs = 4
+
+# Build the persistent call-graph section. Disabling falls back to live-scan
+# for `vex callers`/`vex callees` (slower per-query, but saves indexing
+# time on large monorepos). The opt-out is persisted in the manifest so
+# `vex update` does not silently re-add the section.
+# Per-invocation override: `vex index --no-call-graph`.
+# call_graph = true
+
+# Build the BM25 channel. Disabling drops the third RRF channel and keeps
+# only structural (+ semantic). Same persistence rules as `call_graph`.
+# Per-invocation override: `vex index --no-bm25`.
+# bm25 = true

CLAUDE.md

@@ -102,4 +102,146 @@ Marathon_<YYYY-MM-DD>_to_<YYYY-MM-DD>.xlsx
 
 ## Recurring Issues & Patterns
 
-(Populated as we work — leave empty until something repeats.)
+- **`dotnet new sln` on .NET 10 SDK produces `.slnx`**, not `.sln`. If the plan
+  references `Marathon.sln`, hand-craft the traditional format alongside `.slnx`.
+- **`Marathon.Application` namespace vs `System.Windows.Application`:** in any WPF
+  project that references `Marathon.Application`, always write
+  `System.Windows.Application` fully qualified in `App.xaml.cs`.
+- **`Directory.Build.props` must NOT set `TargetFramework`** when projects in the
+  same solution use different TFMs (e.g., `net8.0` vs `net8.0-windows`).
+- **Razor source generator does NOT accept C# 11 raw string literals** (`"""…"""`)
+  inside `@code` blocks — concatenate single-quoted attribute strings instead.
+- **Razor reserves the identifier `code`.** Loop variables must use any other
+  name (`var sportCode in ...`) or the parser treats it as the `@code` directive.
+- **`MudBlazor.DateRange` shadows `Marathon.Application.Storage.DateRange`** in
+  any Razor file that pulls both namespaces via `_Imports.razor`. Use a per-file
+  alias: `using AppDateRange = Marathon.Application.Storage.DateRange;`.
+- **`Plotly.Blazor.LayoutLib.Margin` clashes with `MudBlazor.Margin`.** Fully
+  qualify the Plotly side at the new-expression: `new Plotly.Blazor.LayoutLib.Margin {…}`.
+- **`Event.ScheduledAt` requires offset `+03:00`.** Test fixtures and any code
+  that constructs Moscow datetimes must use `new DateTimeOffset(date, TimeSpan.FromHours(3))`,
+  never pass a `DateTime.UtcNow` value to that constructor.
+- **EF migrations — generate with `dotnet ef`, do NOT `migrations remove`.**
+  `MarathonDbContextFactory` is a self-contained design-time factory, so
+  `dotnet ef migrations add X --project src/Marathon.Infrastructure --startup-project src/Marathon.Infrastructure`
+  works. AVOID `dotnet ef migrations remove`: older migrations were hand-written without a
+  Designer snapshot, so remove blanks `MarathonDbContextModelSnapshot.cs` and the next `add`
+  regenerates the WHOLE schema. Validate a migration on a throwaway DB with
+  `dotnet ef database update --connection "Data Source=<ABSOLUTE>/data/_migtest.db"` (absolute
+  path — EF resolves relatives from the build-output dir, not the shell cwd; create `./data/` first).
+- **`Sports.Code` is `.ValueGeneratedNever()`** — it's the bookmaker's natural sport id
+  (6/11/22723…), not an autoincrement surrogate. Without it EF's int-PK convention emits a
+  spurious AUTOINCREMENT `AlterColumn` on every migration.
+- **Validated get-only record properties block `with`** (CS0200): `BacktestStrategy.MinScore`,
+  `PaperBet.Rate`/`Stake` are re-declared with validation, so build a new instance instead of
+  `with { ThatProp = … }` (you can still `with` the un-redeclared props, e.g. `SavedStrategy with { Strategy = … }`).
+- **`JsonSettingsWriter.SaveSectionAsync` replaces the whole section** (`root[section]=json`),
+  so a Settings-UI save drops any key not on the form. Never surface a secret-bearing section
+  (e.g. `Notifications` → Telegram token) in the UI — it would wipe the secret from
+  `appsettings.Local.json`. To surface a non-secret section, add a mutable mirror options class
+  in `Marathon.UI.Services` bound to the same section name (UI can't reference Infrastructure's
+  options types — same pattern as the two `WorkerOptions`).
+
+## Feature: Initial Implementation > Phase 4: Application + Workers — Learnings
+
+- **Two `WorkerOptions` classes coexist** with the same JSON shape but different namespaces:
+  `Marathon.Infrastructure.Configuration.WorkerOptions` (immutable `init`, used by workers)
+  and `Marathon.UI.Services.WorkerOptions` (mutable `set`, used by Settings page).
+  Both bind to `"Workers"` in `appsettings.json`. Keep them in sync when adding new keys.
+- **`Microsoft.Extensions.Logging.EventId` conflicts with `Marathon.Domain.ValueObjects.EventId`**
+  in any project that adds `Microsoft.Extensions.Logging.Abstractions`. Fix with a global alias
+  in `GlobalUsings.cs`: `global using LogEventId = Microsoft.Extensions.Logging.EventId;`
+  and local file aliases where both are used together.
+- **NSubstitute cannot proxy `sealed` classes.** Use cases are `sealed record` or `sealed class`.
+  Worker tests must build a real use-case instance backed by substituted interfaces rather than
+  substituting the use case directly.
+- **`BackgroundService` workers are singletons; use cases are scoped.** Always resolve scoped
+  use cases via `IServiceProvider.CreateAsyncScope()` inside the worker loop — never inject them
+  directly into the constructor.
+- **Cronos 6-field cron format.** Pass `CronFormat.IncludeSeconds` to `CronExpression.Parse`
+  when the expression has a seconds field (e.g., `"0 0 */6 * * *"`). Default Cronos parse
+  expects 5-field (no seconds).
+- **`ApplicationModule.AddMarathonApplication` takes no `IConfiguration`** — the Application
+  layer has no config bindings of its own. Infrastructure and UI bind their own options sections.
+
+## Feature: Initial Implementation > Phase 0: Scraping Spike — Learnings
+
+(Permanent learnings about marathonbet.by data shape, anti-bot, page structure.
+For full detail see `spike/SCRAPE_FINDINGS.md` and `spike/SCHEMA_DRAFT.md`.)
+
+- **Site is fully SSR (`Server: nginx`).** Anonymous GET with browser User-Agent
+  returns full HTML for `/su/`, `/su/live`, `/su/popular/<Sport>`,
+  `/su/betting/<event-path>`. No Cloudflare, no JS challenge.
+- **Use HttpClient + AngleSharp + Polly v8** — no Playwright needed for read-only.
+  Keep `Scraping:UsePlaywright = false` flag for future-proofing.
+- **Sport ID = `data-sport-treeId` = breadcrumb canonical ID.** Confirmed:
+  Basketball=6, Football=11, Tennis=22723, Hockey=43658. URL by ID:
+  `/su/betting/<Sport>+-+<id>` (preferred over `/su/popular/<Sport>` because the
+  ID is stable).
+- **`EventCode` = `data-event-eventId`** (numeric, ~26-million range, stable).
+  `TreeId` = `data-event-treeId` (URL-routing ID, less stable). Use `EventCode`
+  as the entity primary key in SQLite.
+- **Selection key format:** `{eventId}@{MarketName}{LineIndex?}.{Outcome}`.
+  Outcomes: `1`/`draw`/`3` for 3-way, `HB_H`/`HB_A` for handicap, `Under_<X>`/
+  `Over_<X>` for totals. Total threshold is encoded in the outcome string;
+  handicap value lives in `<span class="middle-simple">` text.
+- **Tennis has no Draw outcome.** Domain `Bet_Match_Draw` must be nullable; Excel
+  exporter writes empty cell when null.
+- **Date parsing:** listing shows `HH:MM` (today) or `DD <ru-month> HH:MM` (future).
+  Anchor with `initData.serverTime` (Moscow TZ, format `YYYY,MM,DD,HH,MM,SS`)
+  parsed from the embedded `<script>` blob on every scraped page.
+- **Live updates:** site polls `/su/liveupdate/popular/?treeIds=...` every 3 s but
+  response is just `{"modified":[{"type":"refreshPage"}],...}` — re-scrape the
+  full event detail HTML for actual odds. Our analyzer cadence: pre-match 30 s,
+  live 5–10 s.
+- **No public results / archive page** (`/su/results` → 404). Final scores must
+  be harvested by polling the event detail page until
+  `eventJsonInfo.matchIsComplete=true`, then storing `resultDescription`. Phase 8
+  cannot back-fill from a public archive.
+- **Period scope vocabulary varies by sport:** football=`1st_Half`, basketball=
+  `1st_Half`/`1st_Quarter`, tennis=`1st_Set`, hockey=`1st_Period`. Domain stores
+  `PeriodNumber:int` and a sport-aware `PeriodScopeMapper` resolves the correct
+  market token at parse time.
+
+## Feature: Initial Implementation > Phase 7: Anomaly UI — Learnings
+
+- **Severity buckets are a single-source rule** in
+  `Marathon.UI.Services.AnomalySeverityRules.FromScore` (Low <0.45, Medium <0.60,
+  High ≥0.60). The badge pill, card border, feed filter chip, and stat strip all
+  bind through it — never duplicate the thresholds.
+- **`AnomalyBrowsingService` is Scoped, `AnomalyBrowsingState` is Singleton** —
+  same lifetime split as `EventBrowsingService` / `EventBrowsingState`. State
+  holds the immutable `AnomalyFilter` + `LastSeenUtc` + cached unread count.
+- **`Anomaly.EvidenceJson` is parsed once in the service layer** via
+  `JsonSerializer.Deserialize<EvidenceDto>(json, PropertyNameCaseInsensitive=true)`
+  with private nested DTOs. Pages bind to `AnomalyEvidenceSnapshot` value-records
+  — they never see the raw JSON. Malformed JSON is dropped silently from the feed.
+- **2-way markets (tennis) carry `pDraw=null` / `rateDraw=null`.** The
+  `AnomalyEvidence` and `AnomalyCard` components key off the `IsTwoWay` flag on
+  `AnomalyListItem` (computed when both pre/post `pDraw` are null) to omit the
+  Draw row in BOTH columns — never per-column-individually.
+- **Signal-red is the load-bearing alert tone** for Phase 7. Use
+  `var(--m-c-anomaly)` exclusively (never raw `#dc2626`). Pulsing animation
+  (`m-pulse`) MUST respect `prefers-reduced-motion`.
+
+## Feature: Analysis Hardening (H-series) — Learnings
+
+- **Anomaly detectors are a fan-out array in `DetectAnomaliesUseCase`** — 4 now
+  (`SuspensionFlip`, `SteamMove`, `SuspensionFreeze`, `OverroundCompression`). A new detector
+  implements `IAnomalyDetector`, reuses `MatchWinEvidence` for the canonical evidence JSON
+  (so the parser + outcome evaluator work unchanged), and is added to that array. Continuous
+  sliding-window detectors (steam, overround) emit at every `end` and skip suspension-sized
+  gaps so they never overlap the across-suspension flip/freeze detectors.
+- **`AnomalyKind.IsDirectional()` gates staking/grading** — flip + steam are directional
+  (predict a side); freeze + overround are informational and are excluded from the backtest
+  (`RunBacktestUseCase`) and the outcome evaluator so they don't skew hit-rate/score calibration.
+- **`SavedStrategy` (backtest presets) use NOCASE name collation** — the unique index AND
+  `GetByNameAsync` both fold case (column-level `UseCollation("NOCASE")`), so save-by-name
+  upserts rather than creating "Kelly"/"kelly" duplicates. Domain stores stake fractions; the
+  form/VM speak percent — convert ×100/÷100 at the UI boundary.
+- **Paper-trading (forward-test) is a config-gated worker** (`PaperTrading:Enabled`, default
+  false; tunable on the Settings page). `PaperTradingWorker` opens flat-stake `PaperBet`s on
+  new directional anomalies (unique on `AnomalyId`; baseline since-marker advances only after a
+  successful open pass; settle runs in its own catch so a settle failure can't strand the
+  marker) and settles them against results (Won iff pick == winner). `/paper-trading` shows
+  settled-only P&L. The ledger is FK-free (survives snapshot-retention pruning), like `PlacedBets`.

Directory.Build.props

@@ -0,0 +1,9 @@
+<Project>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <LangVersion>12</LangVersion>
+    <TreatWarningsAsErrors Condition="'$(Configuration)'=='Release'">true</TreatWarningsAsErrors>
+    <AnalysisLevel>latest</AnalysisLevel>
+  </PropertyGroup>
+</Project>

Directory.Packages.props

@@ -0,0 +1,65 @@
+<Project>
+  <PropertyGroup>
+    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
+  </PropertyGroup>
+
+  <!-- Test infrastructure -->
+  <ItemGroup>
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageVersion Include="xunit" Version="2.9.2" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
+    <PackageVersion Include="coverlet.collector" Version="6.0.2" />
+    <PackageVersion Include="FluentAssertions" Version="6.12.2" />
+    <PackageVersion Include="NSubstitute" Version="5.1.0" />
+    <PackageVersion Include="bunit" Version="1.36.0" />
+  </ItemGroup>
+
+  <!-- Blazor / ASP.NET Core -->
+  <ItemGroup>
+    <PackageVersion Include="Microsoft.AspNetCore.Components.Web" Version="8.0.12" />
+  </ItemGroup>
+
+  <!-- Infrastructure (future phases) -->
+  <ItemGroup>
+    <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="8.0.12" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.12" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.12" />
+    <PackageVersion Include="AngleSharp" Version="1.2.0" />
+    <PackageVersion Include="Microsoft.Extensions.Http.Resilience" Version="8.10.0" />
+    <PackageVersion Include="Polly" Version="8.5.2" />
+    <PackageVersion Include="ClosedXML" Version="0.104.2" />
+    <PackageVersion Include="Serilog" Version="4.2.0" />
+    <PackageVersion Include="Serilog.Extensions.Hosting" Version="8.0.0" />
+    <PackageVersion Include="Serilog.Sinks.File" Version="6.0.0" />
+    <PackageVersion Include="Serilog.Sinks.Console" Version="6.0.0" />
+  </ItemGroup>
+
+  <!-- WPF Blazor Host (future phases) -->
+  <ItemGroup>
+    <PackageVersion Include="Microsoft.AspNetCore.Components.WebView.Wpf" Version="8.0.100" />
+    <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.2" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration.Json" Version="8.0.1" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="8.0.0" />
+    <PackageVersion Include="Microsoft.Extensions.Options" Version="8.0.2" />
+    <PackageVersion Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="8.0.0" />
+    <PackageVersion Include="Microsoft.Extensions.Http" Version="8.0.1" />
+    <PackageVersion Include="Microsoft.Extensions.Logging" Version="8.0.1" />
+    <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.2" />
+    <PackageVersion Include="Microsoft.Extensions.Hosting" Version="8.0.1" />
+    <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="8.0.1" />
+    <PackageVersion Include="Microsoft.Extensions.Localization" Version="8.0.12" />
+  </ItemGroup>
+
+  <!-- UI / Blazor components (Phase 5+) -->
+  <ItemGroup>
+    <PackageVersion Include="MudBlazor" Version="7.15.0" />
+    <PackageVersion Include="Plotly.Blazor" Version="5.4.1" />
+  </ItemGroup>
+
+  <!-- Scheduling (Phase 4 worker cron) -->
+  <ItemGroup>
+    <PackageVersion Include="Cronos" Version="0.9.0" />
+  </ItemGroup>
+</Project>

Marathon.sln

@@ -0,0 +1,85 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.Domain", "src\Marathon.Domain\Marathon.Domain.csproj", "{7C944335-83D2-47BB-8C69-F575602D5E07}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.Application", "src\Marathon.Application\Marathon.Application.csproj", "{E8B43AE4-84A8-4D33-B1D3-730945B225EB}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.Infrastructure", "src\Marathon.Infrastructure\Marathon.Infrastructure.csproj", "{C130635E-27D5-4753-8018-BD71937ED459}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.UI", "src\Marathon.UI\Marathon.UI.csproj", "{1355540A-3AB0-46FF-808B-A0329B6321BA}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.Hosts.WpfBlazor", "src\Marathon.Hosts.WpfBlazor\Marathon.Hosts.WpfBlazor.csproj", "{F1A6C0A4-F27D-460B-BECF-90325423B731}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.Domain.Tests", "tests\Marathon.Domain.Tests\Marathon.Domain.Tests.csproj", "{5F02523E-4308-46BE-A033-CB5469F6D62F}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.Application.Tests", "tests\Marathon.Application.Tests\Marathon.Application.Tests.csproj", "{A6BF4C17-FEEA-4575-8085-36DB18F0DA76}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.Infrastructure.Tests", "tests\Marathon.Infrastructure.Tests\Marathon.Infrastructure.Tests.csproj", "{59F23C54-75C6-469F-9F44-79E0B499A58F}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Marathon.UI.Tests", "tests\Marathon.UI.Tests\Marathon.UI.Tests.csproj", "{D675B598-20C6-4B8E-A086-65A31B729C12}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{4B7367A5-AA76-4CB9-B122-DAFE4A99D854}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{F225CE82-66E1-4F3C-87EE-7A11863599B0}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{7C944335-83D2-47BB-8C69-F575602D5E07}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7C944335-83D2-47BB-8C69-F575602D5E07}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7C944335-83D2-47BB-8C69-F575602D5E07}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7C944335-83D2-47BB-8C69-F575602D5E07}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E8B43AE4-84A8-4D33-B1D3-730945B225EB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E8B43AE4-84A8-4D33-B1D3-730945B225EB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E8B43AE4-84A8-4D33-B1D3-730945B225EB}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E8B43AE4-84A8-4D33-B1D3-730945B225EB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C130635E-27D5-4753-8018-BD71937ED459}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C130635E-27D5-4753-8018-BD71937ED459}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C130635E-27D5-4753-8018-BD71937ED459}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C130635E-27D5-4753-8018-BD71937ED459}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1355540A-3AB0-46FF-808B-A0329B6321BA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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+		{D675B598-20C6-4B8E-A086-65A31B729C12}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
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+	EndGlobalSection
+EndGlobal

Marathon.slnx

@@ -0,0 +1,15 @@
+<Solution>
+  <Folder Name="/src/">
+    <Project Path="src/Marathon.Application/Marathon.Application.csproj" />
+    <Project Path="src/Marathon.Domain/Marathon.Domain.csproj" />
+    <Project Path="src/Marathon.Hosts.WpfBlazor/Marathon.Hosts.WpfBlazor.csproj" />
+    <Project Path="src/Marathon.Infrastructure/Marathon.Infrastructure.csproj" />
+    <Project Path="src/Marathon.UI/Marathon.UI.csproj" />
+  </Folder>
+  <Folder Name="/tests/">
+    <Project Path="tests/Marathon.Application.Tests/Marathon.Application.Tests.csproj" />
+    <Project Path="tests/Marathon.Domain.Tests/Marathon.Domain.Tests.csproj" />
+    <Project Path="tests/Marathon.Infrastructure.Tests/Marathon.Infrastructure.Tests.csproj" />
+    <Project Path="tests/Marathon.UI.Tests/Marathon.UI.Tests.csproj" />
+  </Folder>
+</Solution>

design/index.html

@@ -0,0 +1,7 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Marathon — Redesign Directions</title>
+<meta http-equiv="refresh" content="0; url=redesign-mockups.html">
+<body style="background:#05060a;color:#aeb8c8;font-family:monospace;padding:40px">
+<a href="redesign-mockups.html" style="color:#34e07f">Open Marathon redesign mockups →</a>
+</body>

design/redesign-mockups.html

@@ -0,0 +1,641 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+<title>Marathon — Redesign Directions</title>
+
+<!-- Distinct type per direction: Archivo+JetBrains Mono / Anton+DM Sans+Space Mono / Outfit+Manrope+IBM Plex Mono -->
+<link rel="preconnect" href="https://fonts.googleapis.com" />
+<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+<link href="https://fonts.googleapis.com/css2?family=Anton&family=Archivo:wght@400;500;600;700;800;900&family=DM+Sans:opsz,wght@9..40,400;9..40,500;9..40,700&family=IBM+Plex+Mono:wght@400;500;600&family=JetBrains+Mono:wght@400;500;700;800&family=Manrope:wght@400;500;600;700;800&family=Outfit:wght@300;400;500;600;700;800&family=Space+Mono:wght@400;700&display=swap" rel="stylesheet" />
+
+<style>
+/* ============================================================
+   META CHROME  (not part of any design — the direction switcher)
+   ============================================================ */
+*,*::before,*::after{ box-sizing:border-box; }
+html,body{ margin:0; padding:0; }
+body{ background:#05060a; min-height:100vh; font-family:"JetBrains Mono",monospace; }
+a{ text-decoration:none; color:inherit; }
+button{ font:inherit; cursor:pointer; border:0; background:none; color:inherit; }
+svg{ display:block; }
+.ico{ width:18px; height:18px; flex:none; }
+
+.switch{
+  position:fixed; inset:0 0 auto 0; height:54px; z-index:9999;
+  display:flex; align-items:center; gap:18px;
+  padding:0 18px;
+  background:rgba(8,10,16,.86);
+  backdrop-filter:blur(14px);
+  border-bottom:1px solid rgba(255,255,255,.08);
+}
+.switch__label{
+  font:600 11px/1 "JetBrains Mono",monospace; letter-spacing:.22em; text-transform:uppercase;
+  color:#5b6678; white-space:nowrap;
+}
+.switch__label b{ color:#cdd6e4; font-weight:700; }
+.switch__tabs{ display:flex; gap:8px; }
+.tab{
+  display:flex; flex-direction:column; gap:2px;
+  padding:7px 14px; border-radius:9px;
+  border:1px solid rgba(255,255,255,.10);
+  background:rgba(255,255,255,.03);
+  transition:border-color .18s, background .18s, transform .18s;
+}
+.tab:hover{ transform:translateY(-1px); border-color:rgba(255,255,255,.24); }
+.tab__name{ font:700 12.5px/1 "JetBrains Mono",monospace; letter-spacing:.04em; color:#aeb8c8; }
+.tab__tag{ font:500 9.5px/1 "JetBrains Mono",monospace; letter-spacing:.14em; text-transform:uppercase; color:#5b6678; }
+.tab[data-for="noir"].is-on{ background:rgba(43,213,118,.12); border-color:rgba(43,213,118,.5); }
+.tab[data-for="noir"].is-on .tab__name{ color:#34e07f; }
+.tab[data-for="velocity"].is-on{ background:rgba(198,244,0,.16); border-color:rgba(198,244,0,.6); }
+.tab[data-for="velocity"].is-on .tab__name{ color:#dcff4a; }
+.tab[data-for="aurora"].is-on{ background:rgba(139,124,255,.18); border-color:rgba(139,124,255,.6); }
+.tab[data-for="aurora"].is-on .tab__name{ color:#b3a8ff; }
+.switch__hint{ margin-left:auto; font:500 10px/1 "JetBrains Mono",monospace; letter-spacing:.16em; text-transform:uppercase; color:#3f4859; }
+
+.stage{ display:none; min-height:100vh; padding-top:54px; position:relative; }
+.stage.is-active{ display:block; }
+.stage .fx{ position:absolute; inset:54px 0 0 0; pointer-events:none; z-index:0; overflow:hidden; }
+.mount{ position:relative; z-index:1; }
+
+@media (prefers-reduced-motion: reduce){
+  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; }
+}
+
+/* ============================================================
+   SHARED STRUCTURE  (styled differently under each .d-* scope)
+   ============================================================ */
+.app{ display:grid; grid-template-rows:auto 1fr; min-height:calc(100vh - 54px); }
+.body{ display:grid; grid-template-columns:248px minmax(0,1fr); min-height:0; }
+.main{ min-width:0; overflow:auto; }
+.bar{ display:flex; align-items:center; gap:14px; padding:0 22px; height:62px; }
+.bar__spacer{ flex:1; }
+.bar__tools{ display:flex; align-items:center; gap:14px; }
+.brand{ display:flex; align-items:baseline; gap:10px; }
+.locale{ display:inline-flex; overflow:hidden; }
+.nav{ display:flex; flex-direction:column; min-height:0; overflow:auto; }
+.nav-link{ display:flex; align-items:center; gap:12px; }
+.nav-link .lbl{ flex:1; }
+.badge{ display:inline-grid; place-items:center; }
+.stats{ display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); }
+.stat{ display:flex; flex-direction:column; }
+.grid2{ display:grid; grid-template-columns:minmax(0,1.55fr) minmax(0,1fr); }
+@media (max-width:1080px){ .grid2{ grid-template-columns:1fr; } .stats{ grid-template-columns:repeat(2,1fr); } }
+.feed{ display:flex; flex-direction:column; }
+.signal{ display:grid; }
+.sig-mkts{ display:flex; flex-wrap:wrap; }
+.mkt{ display:inline-flex; align-items:baseline; }
+.pipe{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; }
+.step{ display:flex; align-items:center; }
+.sporticon{ display:inline-grid; place-items:center; flex:none; font-weight:700; }
+
+@keyframes rise{ from{ opacity:0; transform:translateY(10px);} to{ opacity:1; transform:none;} }
+@keyframes pulse{ 0%,100%{ opacity:.35; transform:scale(1);} 50%{ opacity:1; transform:scale(1.25);} }
+
+/* ════════════════════════════════════════════════════════════
+   DIRECTION 1 — TERMINAL NOIR   (dark trading terminal)
+   Archivo (heavy numerals) + JetBrains Mono. Neon-on-black, grid.
+   ════════════════════════════════════════════════════════════ */
+.d-noir{
+  --bg:#070a0f; --bg2:#0b0f16; --card:#0d1219; --card2:#10161f;
+  --line:#1b2330; --line2:#28303d;
+  --ink:#e7eef6; --mut:#828d9e; --dim:#5a6475;
+  --grn:#2bd576; --red:#ff5a6e; --cyan:#36e0ff; --amber:#ffb02e; --signal:#ff4d5e;
+  background:var(--bg); color:var(--ink);
+  font-family:"JetBrains Mono",monospace;
+}
+.d-noir .fx{
+  background:
+    radial-gradient(900px 480px at 78% -6%, rgba(54,224,255,.07), transparent 60%),
+    radial-gradient(760px 520px at 4% 108%, rgba(43,213,118,.06), transparent 60%),
+    linear-gradient(transparent 95%, rgba(255,255,255,.022) 95%),
+    linear-gradient(90deg, transparent 95%, rgba(255,255,255,.022) 95%);
+  background-size:auto,auto,38px 38px,38px 38px;
+}
+.d-noir .bar{ background:linear-gradient(180deg,#0c1118,#0a0e14); border-bottom:1px solid var(--line); }
+.d-noir .bar__menu{ color:var(--mut); display:grid; place-items:center; width:34px; height:34px; border:1px solid var(--line); border-radius:6px; }
+.d-noir .bar__menu:hover{ color:var(--ink); border-color:var(--line2); }
+.d-noir .brand__mark{ font:800 19px/1 "Archivo",sans-serif; letter-spacing:-.01em; }
+.d-noir .brand__mark::first-letter{ color:var(--grn); }
+.d-noir .brand__sub{ font:500 10px/1 "JetBrains Mono"; letter-spacing:.2em; text-transform:uppercase; color:var(--dim); border-left:1px solid var(--line2); padding-left:10px; }
+.d-noir .capture{ display:inline-flex; align-items:center; gap:8px; font:600 10.5px/1 "JetBrains Mono"; letter-spacing:.16em; text-transform:uppercase; color:var(--grn); padding:6px 10px; border:1px solid rgba(43,213,118,.35); border-radius:6px; background:rgba(43,213,118,.07); }
+.d-noir .capture__dot{ width:7px; height:7px; border-radius:50%; background:var(--grn); box-shadow:0 0 10px var(--grn); animation:pulse 1.6s ease-in-out infinite; }
+.d-noir .locale{ border:1px solid var(--line2); border-radius:6px; }
+.d-noir .locale__btn{ padding:6px 11px; font:600 10.5px/1 "JetBrains Mono"; letter-spacing:.12em; color:var(--dim); }
+.d-noir .locale__btn+.locale__btn{ border-left:1px solid var(--line2); }
+.d-noir .locale__btn.is-active{ background:var(--grn); color:#04130b; }
+.d-noir .theme{ width:34px; height:34px; display:grid; place-items:center; border:1px solid var(--line); border-radius:6px; color:var(--mut); }
+.d-noir .theme:hover{ color:var(--cyan); border-color:var(--line2); }
+
+.d-noir .nav{ background:var(--bg2); border-right:1px solid var(--line); padding:14px 12px; gap:2px; }
+.d-noir .nav__brandblock{ padding:8px 10px 16px; }
+.d-noir .nav__group{ font:600 10px/1 "JetBrains Mono"; letter-spacing:.24em; text-transform:uppercase; color:var(--dim); padding:18px 10px 8px; }
+.d-noir .nav-link{ padding:9px 11px; border-radius:7px; color:var(--mut); font:500 13px/1 "JetBrains Mono"; border-left:2px solid transparent; transition:background .14s,color .14s; }
+.d-noir .nav-link svg{ color:var(--dim); }
+.d-noir .nav-link:hover{ background:rgba(255,255,255,.04); color:var(--ink); }
+.d-noir .nav-link.is-active{ background:rgba(43,213,118,.10); color:#eafff3; border-left-color:var(--grn); }
+.d-noir .nav-link.is-active svg{ color:var(--grn); }
+.d-noir .badge{ min-width:18px; height:18px; padding:0 5px; border-radius:5px; background:var(--signal); color:#fff; font:700 10px/18px "JetBrains Mono"; box-shadow:0 0 12px rgba(255,77,94,.6); }
+
+.d-noir .main{ padding:30px 34px 46px; }
+.d-noir .hero{ max-width:760px; animation:rise .5s both; }
+.d-noir .kicker{ font:600 10.5px/1 "JetBrains Mono"; letter-spacing:.26em; text-transform:uppercase; color:var(--cyan); }
+.d-noir .title{ font:800 clamp(30px,4.4vw,50px)/1.02 "Archivo",sans-serif; letter-spacing:-.02em; margin:14px 0 12px; }
+.d-noir .lede{ color:var(--mut); font:400 14px/1.6 "JetBrains Mono"; max-width:62ch; margin:0; }
+
+.d-noir .stats{ gap:14px; margin:30px 0; animation:rise .5s .06s both; }
+.d-noir .stat{ background:linear-gradient(180deg,var(--card),var(--card2)); border:1px solid var(--line); border-radius:10px; padding:16px 18px; gap:10px; position:relative; overflow:hidden; }
+.d-noir .stat::after{ content:""; position:absolute; left:0; top:0; bottom:0; width:3px; background:var(--cyan); opacity:.5; }
+.d-noir .stat--alert::after{ background:var(--signal); opacity:.9; box-shadow:0 0 18px var(--signal); }
+.d-noir .stat__label{ font:600 10px/1 "JetBrains Mono"; letter-spacing:.18em; text-transform:uppercase; color:var(--dim); }
+.d-noir .stat__value{ font:800 34px/1 "Archivo",sans-serif; letter-spacing:-.02em; font-variant-numeric:tabular-nums; }
+.d-noir .stat--alert .stat__value{ color:var(--signal); }
+.d-noir .stat__delta{ font:500 11px/1 "JetBrains Mono"; color:var(--grn); }
+.d-noir .stat__delta.dn{ color:var(--red); }
+.d-noir .stat__delta.flat{ color:var(--dim); }
+
+.d-noir .grid2{ gap:22px; animation:rise .5s .12s both; }
+.d-noir .side{ display:flex; flex-direction:column; gap:22px; }
+.d-noir .panel{ background:linear-gradient(180deg,var(--card),var(--card2)); border:1px solid var(--line); border-radius:12px; overflow:hidden; }
+.d-noir .panel__head{ display:flex; align-items:center; justify-content:space-between; padding:15px 18px; border-bottom:1px solid var(--line); }
+.d-noir .panel__more{ font:600 10.5px/1 "JetBrains Mono"; letter-spacing:.14em; text-transform:uppercase; color:var(--cyan); }
+.d-noir .panel__more:hover{ text-decoration:underline; }
+
+.d-noir .signal{ grid-template-columns:54px 1fr auto; gap:14px; align-items:center; padding:14px 18px; border-bottom:1px solid var(--line); transition:background .14s; }
+.d-noir .signal:last-child{ border-bottom:0; }
+.d-noir .signal:hover{ background:rgba(54,224,255,.04); }
+.d-noir .signal__time{ font:500 11px/1.4 "JetBrains Mono"; color:var(--dim); }
+.d-noir .sporticon{ width:26px; height:26px; border-radius:7px; font:800 11px/1 "Archivo"; }
+.d-noir .si-football{ background:rgba(43,213,118,.16); color:var(--grn); }
+.d-noir .si-basketball{ background:rgba(255,176,46,.16); color:var(--amber); }
+.d-noir .si-tennis{ background:rgba(54,224,255,.16); color:var(--cyan); }
+.d-noir .si-hockey{ background:rgba(139,156,255,.18); color:#9db0ff; }
+.d-noir .sig-mid{ display:flex; align-items:center; gap:11px; min-width:0; }
+.d-noir .sig-teams{ font:500 14px/1.2 "Archivo",sans-serif; color:var(--ink); }
+.d-noir .sig-sub{ font:500 10.5px/1 "JetBrains Mono"; letter-spacing:.06em; color:var(--dim); margin-top:4px; }
+.d-noir .sig-mkts{ gap:7px; margin-top:9px; }
+.d-noir .mkt{ gap:6px; padding:4px 8px; border:1px solid var(--line); border-radius:6px; background:var(--bg); font-family:"JetBrains Mono"; }
+.d-noir .mkt__k{ font:700 10px/1; color:var(--dim); }
+.d-noir .mkt__pre{ font-size:11.5px; color:var(--mut); text-decoration:line-through; text-decoration-color:var(--line2); }
+.d-noir .mkt__arr{ color:var(--dim); font-size:11px; }
+.d-noir .mkt__post{ font-weight:700; font-size:12.5px; }
+.d-noir .mkt.up .mkt__post{ color:var(--grn); }
+.d-noir .mkt.dn .mkt__post{ color:var(--red); }
+.d-noir .sig-right{ display:flex; flex-direction:column; align-items:flex-end; gap:8px; }
+.d-noir .sev{ font:700 9.5px/1 "JetBrains Mono"; letter-spacing:.14em; text-transform:uppercase; padding:4px 8px; border-radius:5px; border:1px solid currentColor; }
+.d-noir .sev--high{ color:var(--signal); background:rgba(255,77,94,.10); }
+.d-noir .sev--medium{ color:var(--amber); background:rgba(255,176,46,.10); }
+.d-noir .sev--low{ color:var(--dim); background:rgba(255,255,255,.03); }
+.d-noir .score{ display:flex; align-items:center; gap:8px; }
+.d-noir .score__bar{ width:60px; height:5px; border-radius:3px; background:var(--line2); overflow:hidden; }
+.d-noir .score__fill{ height:100%; background:linear-gradient(90deg,var(--amber),var(--signal)); }
+.d-noir .score__n{ font:800 13px/1 "Archivo"; font-variant-numeric:tabular-nums; }
+
+.d-noir .pipe{ padding:8px 10px; }
+.d-noir .step{ gap:13px; padding:11px 8px; border-bottom:1px dashed var(--line); }
+.d-noir .step:last-child{ border-bottom:0; }
+.d-noir .step__idx{ font:800 12px/1 "Archivo"; color:var(--dim); width:24px; }
+.d-noir .step__lbl{ flex:1; font:500 13px/1.2 "JetBrains Mono"; }
+.d-noir .step__lbl small{ display:block; color:var(--dim); font-size:10.5px; margin-top:3px; letter-spacing:.06em; }
+.d-noir .dot{ width:8px; height:8px; border-radius:50%; }
+.d-noir .dot--ok{ background:var(--grn); box-shadow:0 0 9px var(--grn); }
+.d-noir .dot--run{ background:var(--cyan); box-shadow:0 0 9px var(--cyan); animation:pulse 1.4s infinite; }
+.d-noir .dot--idle{ background:var(--line2); }
+
+.d-noir .concept{ padding:18px; }
+.d-noir .concept h4{ margin:0 0 6px; font:800 16px/1.1 "Archivo"; }
+.d-noir .concept p{ margin:0 0 12px; font:400 12px/1.6 "JetBrains Mono"; color:var(--mut); }
+.d-noir .concept .meta{ font:500 10px/1.5 "JetBrains Mono"; letter-spacing:.1em; text-transform:uppercase; color:var(--cyan); }
+
+/* ════════════════════════════════════════════════════════════
+   DIRECTION 2 — VELOCITY   (neo-brutalist sportsbook)
+   Anton (slammed caps) + DM Sans + Space Mono. Acid lime, hard shadows.
+   ════════════════════════════════════════════════════════════ */
+.d-velocity{
+  --paper:#f3f1e9; --paper2:#fffef8; --ink:#0a0a0a; --ink2:#26241e;
+  --lime:#c6f400; --blue:#244bff; --red:#ff3b30; --amber:#ff8a00;
+  --shadow:6px 6px 0 var(--ink);
+  background:var(--paper); color:var(--ink);
+  font-family:"DM Sans",sans-serif;
+}
+.d-velocity .fx{
+  background:
+    repeating-linear-gradient(135deg, transparent 0 22px, rgba(10,10,10,.025) 22px 24px);
+}
+.d-velocity .bar{ background:var(--ink); color:var(--paper2); height:64px; border-bottom:3px solid var(--ink); }
+.d-velocity .bar__menu{ width:38px; height:38px; display:grid; place-items:center; border:2px solid var(--paper2); border-radius:9px; color:var(--paper2); }
+.d-velocity .bar__menu:hover{ background:var(--lime); color:var(--ink); border-color:var(--lime); }
+.d-velocity .brand__mark{ font:400 26px/1 "Anton",sans-serif; letter-spacing:.02em; text-transform:uppercase; color:var(--paper2); }
+.d-velocity .brand__mark::first-letter{ color:var(--lime); }
+.d-velocity .brand__sub{ font:700 10px/1 "Space Mono"; letter-spacing:.18em; text-transform:uppercase; color:var(--lime); }
+.d-velocity .capture{ display:inline-flex; align-items:center; gap:8px; font:700 10.5px/1 "Space Mono"; letter-spacing:.1em; text-transform:uppercase; color:var(--ink); background:var(--lime); padding:8px 12px; border-radius:8px; }
+.d-velocity .capture__dot{ width:8px; height:8px; border-radius:50%; background:var(--ink); animation:pulse 1.3s infinite; }
+.d-velocity .locale{ border:2px solid var(--paper2); border-radius:8px; }
+.d-velocity .locale__btn{ padding:7px 11px; font:700 10.5px/1 "Space Mono"; color:var(--paper2); }
+.d-velocity .locale__btn+.locale__btn{ border-left:2px solid var(--paper2); }
+.d-velocity .locale__btn.is-active{ background:var(--lime); color:var(--ink); }
+.d-velocity .theme{ width:38px; height:38px; display:grid; place-items:center; border:2px solid var(--paper2); border-radius:9px; color:var(--paper2); }
+.d-velocity .theme:hover{ background:var(--lime); color:var(--ink); border-color:var(--lime); }
+
+.d-velocity .nav{ background:var(--paper2); border-right:3px solid var(--ink); padding:18px 14px; gap:6px; }
+.d-velocity .nav__group{ font:700 10px/1 "Space Mono"; letter-spacing:.18em; text-transform:uppercase; color:#9a958a; padding:16px 8px 8px; }
+.d-velocity .nav-link{ padding:11px 12px; border:2px solid transparent; border-radius:10px; font:700 13.5px/1 "DM Sans"; color:var(--ink2); }
+.d-velocity .nav-link:hover{ border-color:var(--ink); transform:translate(-1px,-1px); box-shadow:3px 3px 0 var(--ink); }
+.d-velocity .nav-link.is-active{ background:var(--lime); border-color:var(--ink); box-shadow:var(--shadow); }
+.d-velocity .badge{ min-width:20px; height:20px; padding:0 6px; border-radius:6px; background:var(--red); color:#fff; font:700 11px/20px "Space Mono"; border:2px solid var(--ink); }
+
+.d-velocity .main{ padding:30px 34px 50px; }
+.d-velocity .hero{ max-width:820px; animation:rise .45s both; }
+.d-velocity .kicker{ display:inline-block; font:700 11px/1 "Space Mono"; letter-spacing:.18em; text-transform:uppercase; color:var(--ink); background:var(--lime); padding:6px 10px; border:2px solid var(--ink); border-radius:6px; transform:rotate(-1.5deg); }
+.d-velocity .title{ font:400 clamp(44px,7vw,82px)/.92 "Anton",sans-serif; letter-spacing:.005em; text-transform:uppercase; margin:18px 0 14px; }
+.d-velocity .title em{ font-style:normal; color:var(--blue); -webkit-text-stroke:2px var(--ink); }
+.d-velocity .lede{ color:var(--ink2); font:500 15.5px/1.55 "DM Sans"; max-width:60ch; margin:0; }
+
+.d-velocity .stats{ gap:18px; margin:34px 0; animation:rise .45s .05s both; }
+.d-velocity .stat{ background:var(--paper2); border:3px solid var(--ink); border-radius:14px; box-shadow:var(--shadow); padding:18px 20px; gap:8px; position:relative; }
+.d-velocity .stat__label{ font:700 10.5px/1 "Space Mono"; letter-spacing:.12em; text-transform:uppercase; color:var(--ink2); }
+.d-velocity .stat__value{ font:400 46px/1 "Anton",sans-serif; letter-spacing:.01em; }
+.d-velocity .stat__value::after{ content:""; display:block; width:46px; height:6px; background:var(--lime); margin-top:6px; }
+.d-velocity .stat--alert{ background:var(--ink); color:var(--paper2); }
+.d-velocity .stat--alert .stat__label{ color:var(--lime); }
+.d-velocity .stat--alert .stat__value::after{ background:var(--red); }
+.d-velocity .stat__delta{ font:700 12px/1 "Space Mono"; color:var(--ink2); }
+.d-velocity .stat--alert .stat__delta{ color:var(--red); }
+
+.d-velocity .grid2{ gap:24px; animation:rise .45s .1s both; }
+.d-velocity .side{ display:flex; flex-direction:column; gap:24px; }
+.d-velocity .panel{ background:var(--paper2); border:3px solid var(--ink); border-radius:16px; box-shadow:var(--shadow); overflow:hidden; }
+.d-velocity .panel__head{ display:flex; align-items:center; justify-content:space-between; padding:16px 20px; border-bottom:3px solid var(--ink); background:var(--lime); }
+.d-velocity .panel__head .kicker{ transform:none; background:var(--ink); color:var(--lime); }
+.d-velocity .panel__more{ font:700 11px/1 "Space Mono"; letter-spacing:.1em; text-transform:uppercase; color:var(--ink); }
+.d-velocity .panel__more:hover{ text-decoration:underline; }
+
+.d-velocity .signal{ grid-template-columns:auto 1fr auto; gap:16px; align-items:center; padding:16px 20px; border-bottom:2px solid var(--ink); transition:background .12s; }
+.d-velocity .signal:last-child{ border-bottom:0; }
+.d-velocity .signal:hover{ background:#faf7e8; }
+.d-velocity .sporticon{ width:46px; height:46px; border-radius:11px; border:2px solid var(--ink); font:400 17px/1 "Anton"; }
+.d-velocity .si-football{ background:var(--lime); }
+.d-velocity .si-basketball{ background:var(--amber); color:#fff; }
+.d-velocity .si-tennis{ background:#34d6c0; }
+.d-velocity .si-hockey{ background:var(--blue); color:#fff; }
+.d-velocity .sig-time{ font:700 11px/1 "Space Mono"; color:#8c887d; margin-bottom:5px; }
+.d-velocity .sig-teams{ font:400 21px/1 "Anton",sans-serif; text-transform:uppercase; letter-spacing:.01em; }
+.d-velocity .sig-mkts{ gap:9px; margin-top:11px; }
+.d-velocity .mkt{ gap:6px; padding:5px 9px; border:2px solid var(--ink); border-radius:7px; font-family:"Space Mono"; background:var(--paper); }
+.d-velocity .mkt__k{ font:700 11px/1; color:#8c887d; }
+.d-velocity .mkt__pre{ font-size:12px; color:#8c887d; text-decoration:line-through; }
+.d-velocity .mkt__arr{ color:var(--ink); }
+.d-velocity .mkt__post{ font-weight:700; font-size:14px; }
+.d-velocity .mkt.up{ background:var(--lime); }
+.d-velocity .mkt.dn{ background:#ffe2df; }
+.d-velocity .mkt.dn .mkt__post{ color:var(--red); }
+.d-velocity .sig-right{ display:flex; flex-direction:column; align-items:flex-end; gap:9px; }
+.d-velocity .sev{ font:700 10px/1 "Space Mono"; letter-spacing:.1em; text-transform:uppercase; padding:6px 10px; border:2px solid var(--ink); border-radius:7px; }
+.d-velocity .sev--high{ background:var(--red); color:#fff; }
+.d-velocity .sev--medium{ background:var(--amber); color:var(--ink); }
+.d-velocity .sev--low{ background:var(--paper); color:var(--ink2); }
+.d-velocity .score__n{ font:400 30px/1 "Anton"; }
+.d-velocity .score__bar{ display:none; }
+
+.d-velocity .pipe{ padding:10px 14px; }
+.d-velocity .step{ gap:14px; padding:13px 8px; border-bottom:2px dashed var(--ink); }
+.d-velocity .step:last-child{ border-bottom:0; }
+.d-velocity .step__idx{ font:400 24px/1 "Anton"; color:var(--ink); width:34px; }
+.d-velocity .step__lbl{ flex:1; font:700 14px/1.2 "DM Sans"; }
+.d-velocity .step__lbl small{ display:block; font:700 11px/1 "Space Mono"; color:#8c887d; margin-top:4px; letter-spacing:.05em; }
+.d-velocity .dot{ width:13px; height:13px; border:2px solid var(--ink); border-radius:4px; }
+.d-velocity .dot--ok{ background:var(--lime); }
+.d-velocity .dot--run{ background:var(--blue); animation:pulse 1.3s infinite; }
+.d-velocity .dot--idle{ background:var(--paper); }
+
+.d-velocity .concept{ padding:20px; }
+.d-velocity .concept h4{ margin:0 0 8px; font:400 26px/.95 "Anton"; text-transform:uppercase; }
+.d-velocity .concept p{ margin:0 0 12px; font:500 13px/1.55 "DM Sans"; color:var(--ink2); }
+.d-velocity .concept .meta{ font:700 10.5px/1.5 "Space Mono"; letter-spacing:.08em; text-transform:uppercase; color:var(--ink); background:var(--lime); display:inline-block; padding:4px 8px; border:2px solid var(--ink); border-radius:6px; }
+
+/* ════════════════════════════════════════════════════════════
+   DIRECTION 3 — AURORA   (refined premium fintech, dark glass)
+   Outfit + Manrope + IBM Plex Mono. Indigo glass, aurora glow.
+   ════════════════════════════════════════════════════════════ */
+.d-aurora{
+  --bg:#0a0d1a; --glass:rgba(255,255,255,.045); --glass2:rgba(255,255,255,.07);
+  --line:rgba(255,255,255,.09); --line2:rgba(255,255,255,.16);
+  --ink:#eef1fb; --mut:#9aa3c0; --dim:#6b7494;
+  --violet:#8b7cff; --teal:#3dd6c4; --coral:#ff7a8a; --gold:#ffce6b; --grn:#5fe0a0;
+  background:var(--bg); color:var(--ink);
+  font-family:"Manrope",sans-serif;
+}
+.d-aurora .fx::before,.d-aurora .fx::after{ content:""; position:absolute; border-radius:50%; filter:blur(90px); opacity:.5; }
+.d-aurora .fx::before{ width:620px; height:620px; left:-120px; top:-140px; background:radial-gradient(circle,#5a47d6,transparent 70%); animation:drift1 22s ease-in-out infinite alternate; }
+.d-aurora .fx::after{ width:560px; height:560px; right:-100px; bottom:-160px; background:radial-gradient(circle,#1f8f88,transparent 70%); animation:drift2 26s ease-in-out infinite alternate; }
+@keyframes drift1{ to{ transform:translate(80px,60px) scale(1.1);} }
+@keyframes drift2{ to{ transform:translate(-70px,-50px) scale(1.15);} }
+.d-aurora .fx .glow3{ position:absolute; width:420px; height:420px; left:46%; top:30%; border-radius:50%; filter:blur(100px); opacity:.32; background:radial-gradient(circle,#b06bff,transparent 70%); }
+
+.d-aurora .bar{ background:rgba(12,16,30,.6); backdrop-filter:blur(16px); border-bottom:1px solid var(--line); height:64px; }
+.d-aurora .bar__menu{ width:36px; height:36px; display:grid; place-items:center; border:1px solid var(--line); border-radius:11px; color:var(--mut); background:var(--glass); }
+.d-aurora .bar__menu:hover{ color:var(--ink); border-color:var(--line2); }
+.d-aurora .brand__mark{ font:600 20px/1 "Outfit",sans-serif; letter-spacing:-.01em; }
+.d-aurora .brand__mark::first-letter{ color:var(--violet); }
+.d-aurora .brand__sub{ font:500 10px/1 "IBM Plex Mono"; letter-spacing:.2em; text-transform:uppercase; color:var(--dim); }
+.d-aurora .capture{ display:inline-flex; align-items:center; gap:8px; font:500 10.5px/1 "IBM Plex Mono"; letter-spacing:.12em; text-transform:uppercase; color:var(--grn); padding:7px 12px; border-radius:20px; background:rgba(95,224,160,.10); border:1px solid rgba(95,224,160,.3); }
+.d-aurora .capture__dot{ width:7px; height:7px; border-radius:50%; background:var(--grn); box-shadow:0 0 10px var(--grn); animation:pulse 1.7s infinite; }
+.d-aurora .locale{ border:1px solid var(--line); border-radius:20px; background:var(--glass); }
+.d-aurora .locale__btn{ padding:7px 13px; font:500 10.5px/1 "IBM Plex Mono"; letter-spacing:.1em; color:var(--dim); border-radius:20px; }
+.d-aurora .locale__btn.is-active{ background:linear-gradient(120deg,var(--violet),#6d8bff); color:#fff; }
+.d-aurora .theme{ width:36px; height:36px; display:grid; place-items:center; border:1px solid var(--line); border-radius:11px; color:var(--mut); background:var(--glass); }
+.d-aurora .theme:hover{ color:var(--violet); border-color:var(--line2); }
+
+.d-aurora .nav{ background:rgba(12,16,30,.4); backdrop-filter:blur(10px); border-right:1px solid var(--line); padding:18px 14px; gap:3px; }
+.d-aurora .nav__group{ font:500 10px/1 "IBM Plex Mono"; letter-spacing:.2em; text-transform:uppercase; color:var(--dim); padding:18px 12px 9px; }
+.d-aurora .nav-link{ padding:10px 13px; border-radius:12px; font:600 13.5px/1 "Manrope"; color:var(--mut); position:relative; transition:background .16s,color .16s; }
+.d-aurora .nav-link svg{ color:var(--dim); }
+.d-aurora .nav-link:hover{ background:var(--glass); color:var(--ink); }
+.d-aurora .nav-link.is-active{ background:linear-gradient(120deg,rgba(139,124,255,.22),rgba(109,139,255,.10)); color:#fff; border:1px solid rgba(139,124,255,.32); }
+.d-aurora .nav-link.is-active svg{ color:var(--violet); }
+.d-aurora .badge{ min-width:19px; height:19px; padding:0 6px; border-radius:10px; background:linear-gradient(120deg,var(--coral),#ff5d8f); color:#fff; font:700 10.5px/19px "IBM Plex Mono"; }
+
+.d-aurora .main{ padding:32px 38px 50px; }
+.d-aurora .hero{ max-width:780px; animation:rise .55s both; }
+.d-aurora .kicker{ font:500 11px/1 "IBM Plex Mono"; letter-spacing:.24em; text-transform:uppercase; background:linear-gradient(120deg,var(--violet),var(--teal)); -webkit-background-clip:text; background-clip:text; color:transparent; }
+.d-aurora .title{ font:600 clamp(32px,4.6vw,54px)/1.04 "Outfit",sans-serif; letter-spacing:-.02em; margin:14px 0 14px; }
+.d-aurora .title em{ font-style:normal; background:linear-gradient(120deg,#b9aaff,var(--teal)); -webkit-background-clip:text; background-clip:text; color:transparent; }
+.d-aurora .lede{ color:var(--mut); font:400 15.5px/1.65 "Manrope"; max-width:62ch; margin:0; }
+
+.d-aurora .stats{ gap:18px; margin:32px 0; animation:rise .55s .07s both; }
+.d-aurora .stat{ background:var(--glass); border:1px solid var(--line); border-radius:18px; padding:20px; gap:11px; backdrop-filter:blur(12px); position:relative; overflow:hidden; box-shadow:0 8px 30px rgba(0,0,0,.25); }
+.d-aurora .stat::before{ content:""; position:absolute; inset:0 0 auto 0; height:1px; background:linear-gradient(90deg,transparent,var(--line2),transparent); }
+.d-aurora .stat__label{ font:500 10.5px/1 "IBM Plex Mono"; letter-spacing:.14em; text-transform:uppercase; color:var(--dim); }
+.d-aurora .stat__value{ font:600 38px/1 "Outfit",sans-serif; letter-spacing:-.02em; font-variant-numeric:tabular-nums; }
+.d-aurora .stat--alert .stat__value{ background:linear-gradient(120deg,var(--coral),var(--gold)); -webkit-background-clip:text; background-clip:text; color:transparent; }
+.d-aurora .stat__delta{ display:inline-flex; align-items:center; gap:5px; align-self:flex-start; font:600 11px/1 "IBM Plex Mono"; color:var(--grn); background:rgba(95,224,160,.10); padding:4px 8px; border-radius:8px; }
+.d-aurora .stat__delta.dn{ color:var(--coral); background:rgba(255,122,138,.10); }
+.d-aurora .stat__delta.flat{ color:var(--dim); background:var(--glass2); }
+
+.d-aurora .grid2{ gap:24px; animation:rise .55s .14s both; }
+.d-aurora .side{ display:flex; flex-direction:column; gap:24px; }
+.d-aurora .panel{ background:var(--glass); border:1px solid var(--line); border-radius:20px; overflow:hidden; backdrop-filter:blur(12px); box-shadow:0 10px 36px rgba(0,0,0,.28); }
+.d-aurora .panel__head{ display:flex; align-items:center; justify-content:space-between; padding:18px 22px; border-bottom:1px solid var(--line); }
+.d-aurora .panel__more{ font:500 11px/1 "IBM Plex Mono"; letter-spacing:.1em; text-transform:uppercase; color:var(--violet); }
+.d-aurora .panel__more:hover{ color:#b9aaff; }
+
+.d-aurora .signal{ grid-template-columns:auto 1fr auto; gap:16px; align-items:center; padding:16px 22px; border-bottom:1px solid var(--line); transition:background .16s; }
+.d-aurora .signal:last-child{ border-bottom:0; }
+.d-aurora .signal:hover{ background:var(--glass2); }
+.d-aurora .sporticon{ width:42px; height:42px; border-radius:13px; font:600 15px/1 "Outfit"; border:1px solid var(--line2); }
+.d-aurora .si-football{ background:linear-gradient(135deg,rgba(95,224,160,.22),rgba(95,224,160,.06)); color:var(--grn); }
+.d-aurora .si-basketball{ background:linear-gradient(135deg,rgba(255,206,107,.22),rgba(255,206,107,.06)); color:var(--gold); }
+.d-aurora .si-tennis{ background:linear-gradient(135deg,rgba(61,214,196,.22),rgba(61,214,196,.06)); color:var(--teal); }
+.d-aurora .si-hockey{ background:linear-gradient(135deg,rgba(139,124,255,.26),rgba(139,124,255,.06)); color:#b9aaff; }
+.d-aurora .sig-time{ font:500 11px/1 "IBM Plex Mono"; color:var(--dim); margin-bottom:5px; }
+.d-aurora .sig-teams{ font:600 16px/1.15 "Outfit",sans-serif; color:var(--ink); }
+.d-aurora .sig-mkts{ gap:8px; margin-top:11px; }
+.d-aurora .mkt{ gap:6px; padding:5px 10px; border:1px solid var(--line); border-radius:10px; background:var(--glass); font-family:"IBM Plex Mono"; }
+.d-aurora .mkt__k{ font:600 10px/1; color:var(--dim); }
+.d-aurora .mkt__pre{ font-size:11.5px; color:var(--dim); text-decoration:line-through; text-decoration-color:var(--line2); }
+.d-aurora .mkt__arr{ color:var(--dim); }
+.d-aurora .mkt__post{ font-weight:600; font-size:12.5px; }
+.d-aurora .mkt.up .mkt__post{ color:var(--grn); }
+.d-aurora .mkt.dn .mkt__post{ color:var(--coral); }
+.d-aurora .sig-right{ display:flex; flex-direction:column; align-items:flex-end; gap:9px; }
+.d-aurora .sev{ font:600 9.5px/1 "IBM Plex Mono"; letter-spacing:.12em; text-transform:uppercase; padding:5px 11px; border-radius:20px; }
+.d-aurora .sev--high{ color:#fff; background:linear-gradient(120deg,var(--coral),#ff5d8f); }
+.d-aurora .sev--medium{ color:#3a2c08; background:linear-gradient(120deg,var(--gold),#ffb24d); }
+.d-aurora .sev--low{ color:var(--mut); background:var(--glass2); border:1px solid var(--line); }
+.d-aurora .score{ display:flex; align-items:center; gap:9px; }
+.d-aurora .score__bar{ width:54px; height:5px; border-radius:4px; background:var(--glass2); overflow:hidden; }
+.d-aurora .score__fill{ height:100%; border-radius:4px; background:linear-gradient(90deg,var(--violet),var(--coral)); }
+.d-aurora .score__n{ font:600 15px/1 "Outfit"; font-variant-numeric:tabular-nums; }
+
+.d-aurora .pipe{ padding:10px 14px; }
+.d-aurora .step{ gap:14px; padding:13px 10px; border-bottom:1px solid var(--line); }
+.d-aurora .step:last-child{ border-bottom:0; }
+.d-aurora .step__idx{ font:600 14px/1 "Outfit"; color:var(--dim); width:26px; }
+.d-aurora .step__lbl{ flex:1; font:600 13.5px/1.2 "Manrope"; }
+.d-aurora .step__lbl small{ display:block; font:400 11px/1 "IBM Plex Mono"; color:var(--dim); margin-top:4px; letter-spacing:.04em; }
+.d-aurora .dot{ width:9px; height:9px; border-radius:50%; }
+.d-aurora .dot--ok{ background:var(--grn); box-shadow:0 0 10px var(--grn); }
+.d-aurora .dot--run{ background:var(--teal); box-shadow:0 0 10px var(--teal); animation:pulse 1.5s infinite; }
+.d-aurora .dot--idle{ background:var(--line2); }
+
+.d-aurora .concept{ padding:22px; }
+.d-aurora .concept h4{ margin:0 0 8px; font:600 19px/1.1 "Outfit"; }
+.d-aurora .concept p{ margin:0 0 14px; font:400 13px/1.65 "Manrope"; color:var(--mut); }
+.d-aurora .concept .meta{ font:500 10px/1.5 "IBM Plex Mono"; letter-spacing:.1em; text-transform:uppercase; background:linear-gradient(120deg,var(--violet),var(--teal)); -webkit-background-clip:text; background-clip:text; color:transparent; }
+</style>
+</head>
+
+<body data-active="noir">
+
+<!-- icon sprite -->
+<svg width="0" height="0" style="position:absolute" aria-hidden="true">
+  <symbol id="i-menu" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"><path d="M4 7h16M4 12h16M4 17h16"/></symbol>
+  <symbol id="i-moon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M20 14.5A8 8 0 1 1 9.5 4a6.5 6.5 0 0 0 10.5 10.5z"/></symbol>
+  <symbol id="i-grid" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linejoin="round"><rect x="3.5" y="3.5" width="7" height="7" rx="1.2"/><rect x="13.5" y="3.5" width="7" height="7" rx="1.2"/><rect x="3.5" y="13.5" width="7" height="7" rx="1.2"/><rect x="13.5" y="13.5" width="7" height="7" rx="1.2"/></symbol>
+  <symbol id="i-clock" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="8.5"/><path d="M12 7.5V12l3 2"/></symbol>
+  <symbol id="i-bolt" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linejoin="round"><path d="M13 3 5 13h6l-1 8 8-10h-6z"/></symbol>
+  <symbol id="i-warn" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round"><path d="M12 4 3 19h18z"/><path d="M12 10v4M12 16.5v.4"/></symbol>
+  <symbol id="i-check" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="8.5"/><path d="m8.5 12 2.5 2.5 4.5-5"/></symbol>
+  <symbol id="i-insight" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round"><path d="M9 18h6M10 21h4"/><path d="M12 3a6 6 0 0 0-3.5 10.9c.5.4.5 1 .5 1.6h6c0-.6 0-1.2.5-1.6A6 6 0 0 0 12 3z"/></symbol>
+  <symbol id="i-receipt" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round"><path d="M6 3.5h12v17l-2.2-1.4-2 1.4-1.8-1.4-1.8 1.4-2-1.4L6 20.5z"/><path d="M9 8h6M9 12h6"/></symbol>
+  <symbol id="i-stats" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M5 19V10M10 19V5M15 19v-6M20 19v-9"/></symbol>
+  <symbol id="i-gear" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round"><path d="M5 8h7M16 8h3"/><circle cx="14" cy="8" r="2.2"/><path d="M5 16h3M12 16h7"/><circle cx="10" cy="16" r="2.2"/></symbol>
+</svg>
+
+<!-- ===== direction switcher ===== -->
+<div class="switch">
+  <span class="switch__label"><b>Marathon</b> · Redesign</span>
+  <div class="switch__tabs">
+    <button class="tab is-on" data-for="noir"><span class="tab__name">Terminal Noir</span><span class="tab__tag">Dark · Quant</span></button>
+    <button class="tab" data-for="velocity"><span class="tab__name">Velocity</span><span class="tab__tag">Brutalist · Sport</span></button>
+    <button class="tab" data-for="aurora"><span class="tab__name">Aurora</span><span class="tab__tag">Premium · Glass</span></button>
+  </div>
+  <span class="switch__hint">Press 1 · 2 · 3 to switch</span>
+</div>
+
+<!-- ===== stages ===== -->
+<section class="stage d-noir is-active" data-stage="noir"><div class="fx"></div><div class="mount"></div></section>
+<section class="stage d-velocity" data-stage="velocity"><div class="fx"></div><div class="mount"></div></section>
+<section class="stage d-aurora" data-stage="aurora"><div class="fx"><span class="glow3"></span></div><div class="mount"></div></section>
+
+<script>
+const NAV = [
+  ["Analysis", null],
+  ["Dashboard","i-grid",true], ["Pre-Match","i-clock"], ["Live","i-bolt"],
+  ["Anomalies","i-warn",false,3], ["Results","i-check"], ["Insights","i-insight"],
+  ["My Bets","i-receipt"], ["Backtest","i-stats"],
+  ["System", null],
+  ["Settings","i-gear"],
+];
+
+const STATS = [
+  ["Events tracked","1,284","+38 today","up"],
+  ["Snapshots today","38,902","+5.1K live","up"],
+  ["Anomalies","47","+6 today","alert"],
+  ["Sports covered","4","all active","flat"],
+];
+
+const SIGNALS = [
+  {t:"14:32", sport:"Football",   ic:"football",   mono:"F", teams:"Динамо Минск — БАТЭ",  league:"BLR · Vysshaya Liga", sev:"high",   score:0.82, gap:"72s",
+   mkts:[["1","1.85","2.40","up"],["X","3.40","3.05","dn"],["2","4.20","2.95","dn"]]},
+  {t:"13:58", sport:"Basketball", ic:"basketball", mono:"B", teams:"ЦСКА — Зенит",          league:"VTB United",          sev:"medium", score:0.57, gap:"48s",
+   mkts:[["1","1.62","1.95","up"],["2","2.30","1.88","dn"]]},
+  {t:"12:10", sport:"Tennis",     ic:"tennis",     mono:"T", teams:"Medvedev — Sinner",     league:"ATP Masters 1000",    sev:"low",    score:0.41, gap:"35s",
+   mkts:[["1","1.40","1.55","up"],["2","2.95","2.55","dn"]]},
+  {t:"11:25", sport:"Hockey",     ic:"hockey",     mono:"H", teams:"Динамо Мн — Спартак",   league:"KHL",                 sev:"high",   score:0.74, gap:"65s",
+   mkts:[["1","2.10","2.85","up"],["X","3.80","3.40","dn"],["2","3.05","2.40","dn"]]},
+];
+
+const PIPE = [
+  ["01","Schedule scan","Every 6h","ok"],
+  ["02","Capture snapshots","30s pre · 5s live","ok"],
+  ["03","Detect anomalies","Running now","run"],
+  ["04","Export workbook","Manual","idle"],
+];
+
+const SEV_LABEL = {high:"High", medium:"Medium", low:"Low"};
+
+const META = {
+  noir:     {name:"Terminal Noir", pick:"Pick this if you read Marathon as a precision instrument — dense, fast, every number first. Closest in spirit to the current build, taken fully dark and neon-lit.", fonts:"Type · Archivo + JetBrains Mono"},
+  velocity: {name:"Velocity",      pick:"Pick this if you want energy and impact — loud, confident, unmistakably about sport. Hard edges, acid lime, slammed headlines.", fonts:"Type · Anton + DM Sans + Space Mono"},
+  aurora:   {name:"Aurora",        pick:"Pick this if you want a calm, premium product feel — soft glass, drifting aurora light, refined gradients. Modern fintech polish.", fonts:"Type · Outfit + Manrope"},
+};
+
+function navHTML(){
+  return NAV.map(item=>{
+    if(item[1]===null) return `<div class="nav__group">${item[0]}</div>`;
+    const [label,icon,active,badge]=item;
+    return `<a class="nav-link${active?" is-active":""}">
+      <svg class="ico"><use href="#${icon}"/></svg>
+      <span class="lbl">${label}</span>
+      ${badge?`<span class="badge">${badge}</span>`:""}
+    </a>`;
+  }).join("");
+}
+
+function statsHTML(){
+  return STATS.map(([label,val,delta,kind])=>`
+    <div class="stat${kind==="alert"?" stat--alert":""}">
+      <span class="stat__label">${label}</span>
+      <span class="stat__value">${val}</span>
+      <span class="stat__delta ${kind}">${delta}</span>
+    </div>`).join("");
+}
+
+function mktsHTML(mkts){
+  return mkts.map(([k,pre,post,dir])=>`
+    <span class="mkt ${dir}">
+      <span class="mkt__k">${k}</span>
+      <span class="mkt__pre">${pre}</span>
+      <span class="mkt__arr">→</span>
+      <span class="mkt__post">${post}</span>
+    </span>`).join("");
+}
+
+function signalsHTML(){
+  return SIGNALS.map(s=>`
+    <div class="signal">
+      <span class="sporticon si-${s.ic}">${s.mono}</span>
+      <div class="sig-mid">
+        <div style="min-width:0">
+          <div class="sig-time">${s.t} · ${s.sport} · ${s.league}</div>
+          <div class="sig-teams">${s.teams}</div>
+          <div class="sig-mkts">${mktsHTML(s.mkts)}</div>
+        </div>
+      </div>
+      <div class="sig-right">
+        <span class="sev sev--${s.sev}">${SEV_LABEL[s.sev]}</span>
+        <span class="score">
+          <span class="score__bar"><span class="score__fill" style="width:${Math.round(s.score*100)}%"></span></span>
+          <span class="score__n">${s.score.toFixed(2)}</span>
+        </span>
+      </div>
+    </div>`).join("");
+}
+
+function pipeHTML(){
+  return PIPE.map(([idx,lbl,sub,st])=>`
+    <li class="step">
+      <span class="step__idx">${idx}</span>
+      <span class="step__lbl">${lbl}<small>${sub}</small></span>
+      <span class="dot dot--${st}"></span>
+    </li>`).join("");
+}
+
+function dashboardHTML(key){
+  const m = META[key];
+  return `
+  <div class="app">
+    <header class="bar">
+      <button class="bar__menu" aria-label="Menu"><svg class="ico"><use href="#i-menu"/></svg></button>
+      <div class="brand">
+        <span class="brand__mark">Marathon</span>
+        <span class="brand__sub">Odds Lab · v0.1</span>
+      </div>
+      <div class="bar__spacer"></div>
+      <div class="bar__tools">
+        <span class="capture"><span class="capture__dot"></span>Capturing</span>
+        <div class="locale"><button class="locale__btn is-active">RU</button><button class="locale__btn">EN</button></div>
+        <button class="theme" aria-label="Theme"><svg class="ico"><use href="#i-moon"/></svg></button>
+      </div>
+    </header>
+    <div class="body">
+      <nav class="nav">${navHTML()}</nav>
+      <main class="main">
+        <section class="hero">
+          <span class="kicker">Odds Intelligence</span>
+          <h1 class="title">Suspension-flip <em>radar</em></h1>
+          <p class="lede">Live watch on frozen markets that reopen inverted — the moment a bookmaker swaps underdog and favourite. Sorted by confidence, newest first.</p>
+        </section>
+
+        <div class="stats">${statsHTML()}</div>
+
+        <div class="grid2">
+          <section class="panel">
+            <header class="panel__head"><span class="kicker">Latest signals</span><a class="panel__more">View all →</a></header>
+            <div class="feed">${signalsHTML()}</div>
+          </section>
+          <aside class="side">
+            <section class="panel">
+              <header class="panel__head"><span class="kicker">Pipeline</span></header>
+              <ol class="pipe">${pipeHTML()}</ol>
+            </section>
+            <section class="panel concept">
+              <h4>${m.name}</h4>
+              <p>${m.pick}</p>
+              <span class="meta">${m.fonts}</span>
+            </section>
+          </aside>
+        </div>
+      </main>
+    </div>
+  </div>`;
+}
+
+// mount each stage
+document.querySelectorAll(".stage").forEach(st=>{
+  st.querySelector(".mount").innerHTML = dashboardHTML(st.dataset.stage);
+});
+
+// switcher
+const stages = document.querySelectorAll(".stage");
+const tabs = document.querySelectorAll(".tab");
+function show(key){
+  document.body.dataset.active = key;
+  stages.forEach(s=>s.classList.toggle("is-active", s.dataset.stage===key));
+  tabs.forEach(t=>t.classList.toggle("is-on", t.dataset.for===key));
+  // re-trigger entrance animation
+  const active = document.querySelector(".stage.is-active .main");
+  if(active){ active.style.animation="none"; void active.offsetWidth; active.style.animation=""; }
+  window.scrollTo(0,0);
+}
+tabs.forEach(t=>t.addEventListener("click",()=>show(t.dataset.for)));
+addEventListener("keydown",e=>{
+  if(e.key==="1") show("noir");
+  if(e.key==="2") show("velocity");
+  if(e.key==="3") show("aurora");
+});
+</script>
+</body>
+</html>

plans/initial-implementation/CONTEXT.md

@@ -0,0 +1,290 @@
+# Feature Context: Initial Implementation
+
+## Configuration
+
+- **Development mode:** Automated
+- **Execution mode:** Orchestrator
+- **Strategy:** Big Bang
+- **Build:** `dotnet build Marathon.sln`
+- **Test:** `dotnet test Marathon.sln`
+- **Lint:** `dotnet format Marathon.sln --verify-no-changes`
+- **Run:** `dotnet run --project src/Marathon.Hosts.WpfBlazor`
+- **Implementer models:** Sonnet 4.6 (backend), Opus (frontend)
+- **Reviewer model:** Sonnet 4.6
+
+## Customer Constraints
+
+- Source: marathonbet.by — anonymous scraping (no login). ToS risk acknowledged by customer.
+- Output: Excel files matching customer's wide-column spec (`Bet_Match_Win_1`,
+  `Bet_Period-1_Win_Fora_2_Value`, etc.) with date-range filenames.
+- Storage: customer accepted SQLite-with-Excel-export instead of Excel-as-database
+  (decided 2026-05-05).
+- UI tech: Blazor Hybrid (changed from initial WPF assumption — better for web migration).
+- Locale: RU + EN.
+- Scope: analyze-only initially; design `IBetPlacer` extension point for future betting.
+- Configurability: every variable parameter (polling, concurrency, retry, UA, retention,
+  thresholds, locale) goes in `appsettings.json` + Settings UI page.
+
+## Current State
+
+Repo just initialized. Single `main` commit with `.gitignore` + `README.md` + `CLAUDE.md`.
+Working on `feature/initial-implementation` branch. No source code yet — Phase 0 starts
+with scraping research, no implementation.
+
+## Temporary Workarounds
+
+(none yet)
+
+## Cross-Phase Dependencies
+
+- **Phase 1 (Domain)** is the foundation; all later phases reference domain types.
+- **Phase 2 (Storage)** & **Phase 3 (Scraping)** depend only on Phase 1 — can run in parallel.
+- **Phase 4 (Application + Workers)** depends on Phase 2 + Phase 3.
+- **Phase 5 (UI Shell)** depends on Phase 1 only — can run in parallel with 2/3.
+- **Phase 6 (Event Browsing UI)** depends on Phase 4 + Phase 5.
+- **Phase 7 (Anomaly)** depends on Phase 4 (snapshot storage) + Phase 6 (UI patterns).
+- **Phase 8 (Results)** depends on Phase 6.
+- **Phase 9 (Packaging)** is final — runs full build + test suite.
+
+## Deferred Work
+
+- Bet placing (explicit out-of-scope; design extension point only).
+- Authenticated scraping (anonymous now; `IOddsScraper` impl is swappable).
+- Multi-bookmaker support (only marathonbet.by; abstraction allows future expansion).
+- PostgreSQL backend (SQLite for now; `IRepository<T>` abstraction allows swap).
+
+## Failed Approaches
+
+- **Public results / archive endpoint** — does NOT exist. Tested
+  `https://www.marathonbet.by/su/results`, `/su/results/`, `/su/results.htm` —
+  all return HTTP 404. No `/archive`, `/history` links anywhere in the public
+  HTML either. **Phase 8 deviation:** the Results loader cannot back-fill from
+  an archive — it must poll each event detail page until
+  `eventJsonInfo.matchIsComplete=true` and snapshot `resultDescription` at that
+  moment. Phase 8 implementer must revise the subplan accordingly.
+- **JSONP `/su/liveupdate/popular/` endpoint** — exposes only refresh signals
+  (`{"modified":[{"type":"refreshPage"}],"updated":<ts>}`), not actual odds. Cannot
+  be used as a JSON odds source. Use it only as a "something changed" hint to
+  trigger a full event-detail re-scrape.
+- **Anonymous WebSocket (STOMP)** at `/su/websocket/endpoint` is documented in
+  `initData.stomp` but appears to require an authenticated session
+  (`PUNTER-SESSION-HASH` cookie); we did not test it but the customer's anonymous
+  scraping constraint makes it unsuitable anyway.
+
+## Review Findings Log
+
+(populated by reviewers)
+
+## Phase Execution Log
+
+| Phase | Agent | Model | Test Writer | Parallel | Notes |
+|---|---|---|---|---|---|
+| Phase 0 | phase-implementer | Opus | ⏭️ Skipped (research only) | — | ✅ Done 2026-05-05. Outputs: spike/SCRAPE_FINDINGS.md + spike/SCHEMA_DRAFT.md + 7 local fixtures. Anonymous scraping confirmed feasible; HttpClient+AngleSharp recommended; no Playwright needed; no public results page found (Phase 8 deviation noted). |
+| Phase 1 | phase-implementer | Sonnet 4.6 | ⏭️ Skipped (Big Bang) | — | ✅ Done 2026-05-05. 9 projects (5 src + 4 test). 96 domain tests passed. Key decisions: BetScope sealed hierarchy, ScheduledAt=UTC+3 (Moscow), OddsValue rejects zero. Deviations: slnx auto-created alongside sln, WPF App.xaml.cs needs FQ Application type. |
+| Phase 2 | phase-implementer | Sonnet 4.6 | ⏭️ Skipped (Big Bang) | ✅ With 3 + 5 | — |
+| Phase 3 | phase-implementer | Sonnet 4.6 | ⏭️ Skipped (Big Bang) | ✅ With 2 + 5 | — |
+| Phase 4 | phase-implementer | Sonnet 4.6 | ⏭️ Skipped (Big Bang) | — | ✅ Done 2026-05-05. 4 use cases, 3 BackgroundService pollers, InfrastructureModule, ApplicationModule, reflection wiring removed. 202/202 tests green (+17 new). |
+| Phase 5 | phase-implementer-frontend | Opus | ⏭️ Skipped (Big Bang) | ✅ With 2 + 3 | Uses frontend-design skill |
+| Phase 6 | phase-implementer-frontend | Opus | ⏭️ Skipped (Big Bang) | — | ✅ Done 2026-05-05. PreMatch + Live + Events/Detail pages, EventListShell, SportIcon, OddsCell, OddsTimeline (Plotly.Blazor wrap), ExportDialog. EventBrowsingState + IEventBrowsingService facade. RU+EN strings under PreMatch.* / Live.* / Detail.* / Export.* / Sport.*. 228/228 tests green (+26 new bUnit). |
+| Phase 7 | phase-implementer (split + UI Opus 1M) | Sonnet/Opus | ⏭️ Skipped (Big Bang) | — | ✅ Done 2026-05-05. Backend (Sonnet, a6ff368): pure `AnomalyDetector` + `DetectAnomaliesUseCase` + `AnomalyDetectionPoller` + 14 backend tests. Frontend (Opus 1M): `AnomalyFeed.razor` + `Detail.razor` + `AnomalyCard`/`SeverityBadge`/`AnomalyEvidence` components + `IAnomalyBrowsingService`/`AnomalyBrowsingService`/`AnomalyBrowsingState`/`AnomalyViewModels`. Nav badge with pulsing signal-red unread count. Settings page wired with `Workers:AnomalyDetectionEnabled`. 28 new `Anomaly.*` localization keys (RU+EN parity). 276/276 tests green (+31 new bUnit). |
+| Phase 8 | phase-implementer (split if needed) | Sonnet/Opus | ⏭️ Skipped (Big Bang) | — | UI portion uses Opus |
+| Phase 9 | phase-implementer | Sonnet 4.6 | ✅ Final phase tests | — | Full build + test enforced |
+
+## Environment & Runtime Notes
+
+- Windows 10, PowerShell 5.1 default shell, Bash also available.
+- `git` configured globally; remote `origin` = `https://git.dolgolyov-family.by/alexei.dolgolyov/maraphon-app.git`.
+- Note: home directory (`C:\Users\Alexei`) is itself a git repo (likely accidental).
+  The maraphon-app local `.git` overrides it for this directory tree.
+- .NET SDK assumed installed; if Phase 1 fails on `dotnet --version`, install or
+  document in CONTEXT.md.
+
+## Implementation Notes
+
+### Phase 7 Backend (Anomaly detection, 2026-05-05)
+
+- **`AnomalyDetector` is pure domain — no I/O, no DI.** Constructor takes three ints/decimals
+  from `AnomalyOptions`; the caller (use case) materialises it per cycle.
+  The UI evidence panel can reconstruct the same probabilities from `EvidenceJson` without
+  needing to re-invoke the detector.
+- **Implied probability formula:** `p_i = 1 / rate_i`, then normalise so all `p_i` sum to 1
+  (divorcé of the bookmaker's margin). This is the standard European odds conversion.
+- **Flip score** = `max(|p_post[i] − p_pre[i]|)` over Match-Win sides (p1, pDraw?, p2).
+  Score is clamped to `[0, 1]` before constructing `Anomaly` (domain invariant enforces ≤1).
+- **Two-part gate** — an anomaly requires BOTH: (a) `flipScore ≥ OddsFlipThreshold` AND
+  (b) `argmax(p_pre) != argmax(p_post)`. This prevents spurious detections when one side's
+  probability shifts a lot but it was never the favourite.
+- **Tennis / 2-way markets** — `pDraw` is `null` when no `BetType.Draw` bet is present.
+  The detector and `EvidenceJson` gracefully handle this (JSON field is omitted when null via
+  `DefaultIgnoreCondition.WhenWritingNull`).
+- **`EvidenceJson` uses `System.Text.Json` with custom `JsonPropertyName` attributes** on
+  sealed nested records (`EvidencePayload`, `SnapshotEvidence`). Source generation was not
+  used at this scale — the payload is small and created infrequently.
+- **`DetectAnomaliesUseCase` loads all events + last-24-h live snapshots per cycle.**
+  This is a deliberate simplification; a future optimisation is to track `last_run_at` per
+  event. Documented as 🟡 in the handoff.
+- **Dedup strategy:** two anomalies are considered duplicates if they share `EventId`, `Kind`,
+  and their `DetectedAt` values fall within a 1-minute window. This prevents the same
+  suspension triggering re-insertion on consecutive detection cycles while the gap snapshot
+  pair remains in the 24-hour window.
+- **`AnomalyOptions` placed in `Marathon.Application/Configuration/`** (not Infrastructure).
+  The `AnomalyDetector` itself is in `Marathon.Domain/AnomalyDetection/` but requires no
+  options binding — it takes plain constructor parameters.
+- **`AnomalyDetectionPoller` reads `IOptionsMonitor<AnomalyOptions>` per cycle** so that
+  hot-reload of `DetectionIntervalSeconds` takes effect without a restart. Same pattern as
+  `LiveOddsPoller` reading `WorkerOptions`.
+- **`Workers:AnomalyDetectionEnabled`** added to `WorkerOptions` (default `true`) and
+  `appsettings.json`. UI agent must add a Settings toggle for this flag.
+- **New test count: +17** (13 domain + 4 application). Total: 245/245 passing.
+- **Test note:** rates 1.5/2.5 produce a flip score of ~0.25 — BELOW the 0.30 threshold.
+  Always use 1.3/4.0 (flip score ~0.51) or steeper to guarantee detection in tests.
+
+### Phase 7 Frontend (Anomaly UI, 2026-05-05)
+
+- **Routing — Option A.** Removed the `Pages/Anomalies.razor` placeholder and added
+  `Pages/Anomalies/AnomalyFeed.razor` (`@page "/anomalies"`) plus
+  `Pages/Anomalies/Detail.razor` (`@page "/anomalies/{id:guid}"`). Mirrors the
+  `Pages/Events/Detail.razor` shape from Phase 6.
+- **State + Service split mirrors Phase 6** — `AnomalyBrowsingState` (Singleton inside
+  the RCL; per-circuit in BlazorWebView), `IAnomalyBrowsingService` →
+  `AnomalyBrowsingService` (Scoped). The service does NOT call back into the detector;
+  it reads `IAnomalyRepository.ListAsync` + `IEventRepository.GetAsync` (per distinct
+  EventId) and maps to immutable view-model records.
+- **`EvidenceJson` parsing** uses `System.Text.Json.JsonSerializer.Deserialize` with
+  `PropertyNameCaseInsensitive = true` and private nested DTOs. Failures (malformed
+  JSON, missing pre/post snapshot) drop the row silently — the feed shows the rest.
+- **Severity buckets** are defined once in `AnomalySeverityRules` (Low <0.45, Medium
+  <0.60, High ≥0.60) per the backend handoff. The UI reuses the same enum across
+  filter chips, the badge pill, and the card border.
+- **Signal-red is load-bearing.** High-severity pills, card left borders, evidence
+  post-suspension column outline, the favourite-swap callout, and the nav badge all
+  bind to `--m-c-anomaly`. Medium severity uses the editorial amber `--m-c-accent`;
+  low severity uses the muted `--m-c-ink-soft`. No new color literals introduced.
+- **`AnomalyEvidence` panel** renders two columns (pre → arrow → post). Each row
+  shows the side label, an implied-probability bar (favourite uses amber/red), and
+  the raw rate in tabular mono. 2-way markets (tennis) skip the Draw row in BOTH
+  columns based on the parsed `pDraw` being null. The panel highlights a
+  favourite-swap with a one-line callout above the columns.
+- **Nav badge** lives in `NavBody.razor`, driven by `AnomalyBrowsingState.UnreadCount`.
+  The feed page calls `IAnomalyBrowsingService.GetUnreadCountAsync(LastSeenUtc)` after
+  each load and pushes the count into state. The user clears it via "Mark all read"
+  on the feed toolbar (writes `LastSeenUtc = UtcNow`). The badge pulses with
+  `m-pulse` and respects `prefers-reduced-motion`.
+- **Settings page** — added the `Workers:AnomalyDetectionEnabled` toggle inside the
+  existing WORKERS section, mirroring `LivePollerEnabled` / `UpcomingPollerEnabled`.
+  Bound via `IOptionsMonitor<WorkerOptions>` already in scope.
+- **`Marathon.UI.Services.WorkerOptions`** — added `AnomalyDetectionEnabled` mutable
+  field (set-able for the form-binding pattern used by the Settings page). The
+  Infrastructure-side `WorkerOptions` already had the flag.
+- **Test infrastructure** — added `FakeAnomalyBrowsingService` with
+  `MakeItem(...)` / `MakeSnapshot(...)` static factories; registered in
+  `MarathonTestContext` alongside `AnomalyBrowsingState`.
+- **Localization** — 28 new `Anomaly.*` keys (RU+EN parity) under the
+  `<Surface>.<Element>` convention from Phase 5/6, plus
+  `Settings.Workers.AnomalyDetectionEnabled` and its `.Hint`.
+- **New test count: +31** (9 SeverityBadge + 6 AnomalyCard + 6 AnomalyEvidence +
+  5 AnomalyFeed + 5 AnomalyDetail). Total: 276/276 passing.
+
+### Phase 6 (Event browsing UI, 2026-05-05)
+
+- **Plotly.Blazor pinned to 5.4.1.** v7.x exists but introduces breaking changes;
+  5.4.1 is the latest on the .NET 8 line and works with our existing MudBlazor
+  7.15.0 / .NET 8.0.12 stack. The `Plotly.Blazor.LayoutLib.Margin` type clashes
+  with `MudBlazor.Margin` — fully qualify the layout-side type.
+- **Razor source generator does NOT accept C# 11 raw string literals (`"""…"""`)**
+  inside `@code` blocks. The parser sees the leading `"""` as the start of a
+  normal string and never finds the close, producing an "Unterminated string
+  literal" RZ1000. Use concatenated single-quoted attribute strings instead
+  (see `SportIcon.razor` SVG constants).
+- **Razor reserves the identifier `code`.** A `@foreach (var code in ...)`
+  loop is parsed as the `@code` directive, not as iteration. Use any other
+  identifier (`var sportCode in ...`).
+- **`MudBlazor.DateRange` shadows `Marathon.Application.Storage.DateRange`**
+  in any file whose `_Imports.razor` brings both namespaces in. Add
+  `using AppDateRange = Marathon.Application.Storage.DateRange;` per-file
+  where the application's `DateRange` is constructed (already done in
+  `ExportDialog.razor` and `ExportDialogTests.cs`).
+- **EventBrowsingService is Scoped, EventBrowsingState is Singleton.** The
+  service captures the per-circuit DI scope so EF Core's `DbContext` lifetime
+  works correctly; the state object holds the per-page filter records and
+  fires `OnChange` only when the new value !equals the old one. This split
+  matches Phase 5's split between `ThemeState` (singleton) and per-circuit
+  data services.
+- **View-models, not domain entities, cross the UI boundary.** Pages bind to
+  `EventListItem` / `EventDetail` / `BetRow` / `OddsTimelinePoint`
+  records (defined in `Marathon.UI.Services`). Repositories are not exposed
+  to Razor components. This keeps the UI free of EF tracked graphs and
+  preserves Phase 5's "RCL is host-agnostic" invariant.
+- **Live page reads polling cadence from `IOptionsMonitor<ScrapingSettingsForm>`.**
+  Phase 4's `WorkerOptions.LivePollIntervalSeconds` (drives the poller) is a
+  separate setting from the UI's display refresh; the latter intentionally
+  follows `Scraping:PollingIntervalSeconds` per the Phase 6 subplan.
+- **Plotly chart memoization.** Computed signature = `(count, first ticks,
+  last ticks, first/last rate triples)`. Sufficient to invalidate the trace
+  list on any meaningful change while staying cheap during live polling.
+- **bUnit shared `MarathonTestContext` now registers the fake browsing service
+  and the browsing state.** Phase 7 tests can extend it directly or follow the same pattern.
+  `Support/TestData.MoscowToday(int hour)` produces correctly-offset
+  `DateTimeOffset` values — domain `Event.ScheduledAt` will reject any other
+  offset.
+
+### Phase 1 (Solution skeleton + Domain model, 2026-05-05)
+
+- **.NET 10 SDK creates `.slnx` by default.** `dotnet new sln` produces `Marathon.slnx`
+  (new XML format), not `Marathon.sln`. A hand-crafted `Marathon.sln` was added alongside
+  it so that `dotnet build Marathon.sln` works as specified in the plan. Both files are
+  kept; prefer `Marathon.sln` for CLI commands.
+- **`BetScope` is a sealed record hierarchy:** `abstract record BetScope` with
+  `sealed record MatchScope : BetScope` (singleton `Instance`) and
+  `sealed record PeriodScope(int Number) : BetScope`. Use pattern matching, not
+  an enum+nullable approach.
+- **`Event.ScheduledAt` must be UTC+3 (Moscow), not UTC.** The domain enforces
+  `Offset == TimeSpan.FromHours(3)`. Phase 3 must construct `DateTimeOffset` with
+  `+03:00` before passing to `Event`; do NOT convert to UTC first.
+- **`Directory.Build.props` must NOT set `TargetFramework`** — WpfBlazor needs
+  `net8.0-windows` while all other projects use `net8.0`. Each csproj owns its TFM.
+- **`Marathon.Application` namespace conflicts with `System.Windows.Application`**
+  in WPF `App.xaml.cs`. Fix: use `System.Windows.Application` fully qualified.
+  Phase 5 must keep this qualification.
+- **Central package management:** all `PackageReference` elements in test csproj files
+  must NOT include `Version=`. Versions live exclusively in `Directory.Packages.props`.
+- **96 domain tests, 0 failures.** All invariants covered: SportCode, EventId,
+  OddsRate, OddsValue, BetScope, Bet (all 4 type combinations), OddsSnapshot,
+  Event (ScheduledAt offset), Anomaly.
+
+### Phase 0 (Scraping spike, 2026-05-05)
+
+- **Anonymous scraping is feasible** from a non-Belarus IP. No Cloudflare, no JS
+  challenge, no UA filtering observed. `Server: nginx`. Standard cookies only.
+- **Site is fully SSR.** All needed data (event grid, full odds, breadcrumbs,
+  period markets) is in the raw HTML. No SPA hydration required.
+- **Recommended scraper stack: HttpClient + AngleSharp + Polly v8.** Playwright is
+  not required for read-only scraping — keep it as an optional fallback flag
+  (`Scraping:UsePlaywright`) for future-proofing only.
+- **Polling cadence:** site itself polls live updates every 3 s; for our analyzer,
+  pre-match 30 s and live 5–10 s is sufficient.
+- **Rate-limit:** 5 sequential requests at 1 req/s pacing all returned 200 in <1 s,
+  no throttling. Recommend default `RequestsPerSecond=1`, `MaxConcurrent=4`.
+- **Sport ID semantics:** customer's "Sport_Code = 6" (Basketball) maps to
+  `data-sport-treeId="6"` in the breadcrumb-canonical sport listing
+  (`/su/betting/Basketball+-+6`). Some sports also have a separate "category tree
+  ID" used inside the live grouping (e.g., 45356 for Basketball-live) — ignore
+  those, use only the canonical breadcrumb ID.
+- **Selection key format:** `<eventId>@<MarketName>{LineIndex?}.<Outcome>`. The
+  market name is sport-specific (`Match_Result`, `1st_Half_Result`, `Total_Goals`,
+  `Total_Points`, `Total_Games`, `To_Win_Match_With_Handicap`, etc.). Total
+  thresholds are encoded in the outcome (`Under_3.5`, `Over_213.5`). Handicap
+  values are NOT in the key — they're in `<span class="middle-simple">` text.
+- **Tennis has no Draw outcome** — domain `Bet_Match_Draw` must be nullable.
+- **Date display ambiguity:** listing shows `HH:MM` (today) or `DD <ru-month> HH:MM`
+  (future). Anchor the parser on `initData.serverTime` (Moscow TZ, format
+  `YYYY,MM,DD,HH,MM,SS`).
+- **No public results page** (`/su/results` → 404). Final scores are exposed only
+  on the event detail page itself via `eventJsonInfo` JSON
+  (`matchIsComplete`, `resultDescription`). Phase 8 must poll until completion;
+  cannot back-fill from an archive endpoint.
+- **Probe environment:** Windows 10 + curl, geo-routed as Poland (`countryCode: PL`).
+  Customer in Belarus may see slightly different KYC overlays — parser must be
+  defensive (treat missing markets as null, never throw).
+- **Captures saved locally** at `spike/captures/*.html` (gitignored): 7 fixtures
+  for offline parser development in Phase 3.

plans/initial-implementation/PLAN.md

@@ -0,0 +1,171 @@
+# Feature: Initial Implementation (maraphon-app)
+
+**Branch:** `feature/initial-implementation`
+**Base branch:** `main`
+**Created:** 2026-05-05
+**Status:** 🟡 In Progress
+**Strategy:** Big Bang
+**Mode:** Automated
+**Execution:** Orchestrator
+**Implementer models:** Sonnet 4.6 (backend) · Opus (frontend, with frontend-design skill)
+**Reviewer model:** Sonnet 4.6
+
+## Summary
+
+Build the maraphon-app end-to-end: a Blazor Hybrid (.NET 8 + WPF) sports-betting odds
+analyzer that scrapes marathonbet.by, persists snapshots in SQLite, exports to Excel
+matching the customer spec, and detects coefficient-flip anomalies. Architecture is
+Clean Architecture with all UI in a Razor Class Library so the host can later swap to
+ASP.NET Core Blazor Server with no UI rewrite. RU + EN localization, every variable
+parameter configurable.
+
+## Build & Test Commands
+
+- **Build:** `dotnet build Marathon.sln`
+- **Test:** `dotnet test Marathon.sln`
+- **Lint:** `dotnet format Marathon.sln --verify-no-changes`
+- **Run:** `dotnet run --project src/Marathon.Hosts.WpfBlazor`
+
+> **Big Bang strategy:** Build/tests are NOT run for intermediate phases (Phases 0–8).
+> The full build + test suite must pass at Phase 9 before final review.
+> An exception: a `dotnet build` *compile-only smoke check* is allowed after each
+> phase to catch syntax/type errors early — this is faster than running tests and
+> consistent with Big Bang ("we don't run tests until the end").
+
+## Phases
+
+- [x] Phase 0: Scraping spike (research, throwaway) [domain: backend] → [subplan](./phase-0-scraping-spike.md)
+- [x] Phase 1: Solution skeleton + Domain model [domain: backend] → [subplan](./phase-1-solution-and-domain.md)
+- [x] Phase 2: Infrastructure — Storage [domain: backend] → [subplan](./phase-2-storage.md)
+- [x] Phase 3: Infrastructure — Scraping [domain: backend] → [subplan](./phase-3-scraping.md)
+- [x] Phase 4: Application layer + Background workers [domain: backend] → [subplan](./phase-4-application-and-workers.md)
+- [x] Phase 5: Blazor Hybrid host + Theme + i18n [domain: frontend] → [subplan](./phase-5-host-theme-i18n.md)
+- [x] Phase 6: Event browsing UI [domain: frontend] → [subplan](./phase-6-event-browsing-ui.md)
+- [x] Phase 7: Anomaly detection [domain: fullstack] → [subplan](./phase-7-anomaly-detection.md)
+- [ ] Phase 8: Results loader [domain: fullstack] → [subplan](./phase-8-results-loader.md)
+- [ ] Phase 9: Packaging + polish (final phase — full build + tests required) [domain: fullstack] → [subplan](./phase-9-packaging-polish.md)
+
+## Parallelization Plan (Orchestrator mode)
+
+| Round | Phases | Notes |
+|---|---|---|
+| 1 | Phase 0 | Spike — gating research, no parallelism |
+| 2 | Phase 1 | Domain — must finish before Phases 2/3/5 |
+| 3 | **Phases 2, 3, 5 in parallel** | Storage, Scraping, UI Shell — disjoint files |
+| 4 | Phase 4 | Application + Workers — depends on 2 + 3 |
+| 5 | Phase 6 | Event UI — depends on 4 + 5 |
+| 6 | Phase 7 | Anomaly detection — depends on 6 |
+| 7 | Phase 8 | Results loader — depends on 6 |
+| 8 | Phase 9 | Packaging — final, runs full build + tests |
+
+## Phase Progress Log
+
+| Phase | Domain | Status | Review | Build | Committed |
+|---|---|---|---|---|---|
+| Phase 0: Scraping spike | backend | ✅ Done | ⚠️ Pass with notes (Sonnet) | ⏭️ N/A (research) | ✅ 070e34b |
+| Phase 1: Solution + Domain | backend | ✅ Done | ⚠️ Pass with notes (Sonnet) | ✅ Build OK + 96/96 Domain tests | ✅ 61114ea |
+| Phase 2: Storage | backend | ✅ Done | ⚠️ Pass with notes (Sonnet, combined batch) | ✅ Build OK + 77/77 Infra tests | ✅ batch (e4d8476…686550d…+) |
+| Phase 3: Scraping | backend | ✅ Done | ⚠️ Pass with notes (Sonnet, combined batch) | ✅ Build OK + 77/77 Infra tests | ✅ batch (e4d8476…686550d…+) |
+| Phase 4: Application + Workers | backend | ✅ Done | ⚠️ Pass with notes (Sonnet) | ✅ Build OK + 202/202 tests | ✅ 2acbaa5 |
+| Phase 5: Host + Theme + i18n | frontend | ✅ Done | ⚠️ Pass with notes (Sonnet, combined batch) | ✅ Build OK + 11/11 UI tests | ✅ batch (e4d8476…686550d…+) |
+| Phase 6: Event browsing UI | frontend | ✅ Done | ⚠️ Pass with notes (Sonnet) | ✅ Build OK + 228/228 tests | ✅ 553db2b |
+| Phase 7: Anomaly detection | fullstack | ✅ Done | ⚠️ Pass with notes (Sonnet) | ✅ Build OK + 276/276 tests | ✅ a6ff368 + 12208a4 |
+| Phase 8: Results loader | fullstack | ⬜ Not Started | ⬜ | ⏭️ Big Bang | ⬜ |
+| Phase 9: Packaging + polish | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+
+## Final Review
+
+- [ ] Comprehensive code review (final-reviewer agent)
+- [ ] Security review (auth N/A, but covers scraping HttpClient, file I/O, user input)
+- [ ] Full build passes
+- [ ] Full test suite passes
+- [ ] User merge approval
+- [ ] Merged to `main`
+
+## Resume Notes (2026-05-05 — paused at end of parallel batch P2/P3/P5)
+
+**Where we left off:**
+The parallel batch (Phases 2, 3, 5) completed code-wise. Phase 5 was killed near the
+end of its "verify build" step. All files are committed as a single WIP snapshot
+on `feature/initial-implementation` so nothing is lost. No reviewer ran on this batch
+yet, and the solution does NOT build cleanly — there are known cross-phase compile
+issues to resolve before review.
+
+**Tomorrow's action list (in order):**
+
+1. `git pull` (or just verify branch) — confirm we're on `feature/initial-implementation`
+   at the WIP commit.
+2. Run `dotnet build Marathon.sln` to capture the current error set as a baseline.
+3. **Resolve known cross-phase compile issues:**
+   - **Phase 2 ↔ Phase 3:** Phase 2's repository classes are `internal`; Phase 3's
+     `Marathon.Infrastructure.Tests` references them directly. Fix: add
+     `<InternalsVisibleTo Include="Marathon.Infrastructure.Tests" />` to
+     `src/Marathon.Infrastructure/Marathon.Infrastructure.csproj`. (Or make the
+     repos public — choose by reading the actual csproj first.)
+   - **Phase 5:** `LocalizationOptions` namespace ambiguity (Microsoft.AspNetCore
+     vs Microsoft.Extensions). Fix in WPF host or UI project — qualify or alias.
+   - **Phase 5:** Serilog API mismatch in WPF host (likely `UseSerilog` extension
+     not found because Serilog.Extensions.Hosting wasn't pulled in transitively
+     via the right namespace, OR the API call site uses an older Serilog API).
+4. Once `dotnet build Marathon.sln` is green:
+   - Run `dotnet test Marathon.sln` to see how many tests pass.
+   - Spawn the phase-reviewer agent (Sonnet) to review the parallel batch as a
+     single combined review (Phase 2 + 3 + 5 diff). Pass `git diff 144c936...HEAD`.
+   - Address blocker findings; re-review until pass.
+5. After review passes, finalize with one or more clean commits (the WIP commit
+   can be `git reset --soft` to base and re-committed cleanly per phase, OR left
+   as-is and the review passes apply). Update PLAN.md tracking rows for P2/P3/P5
+   to ✅ Done with commit hashes.
+6. Move to **Phase 4** (Application + Workers — backend, Sonnet 4.6). Phase 4
+   composes the per-module DI extensions (`PersistenceModule.AddMarathonPersistence`
+   and `ScrapingModule.AddMarathonScraping`) into a top-level
+   `Marathon.Infrastructure/DependencyInjection.cs` and adds `BackgroundService`
+   pollers (`UpcomingEventsPoller`, `LiveOddsPoller`, plus a future
+   `ResultsWatchListPoller` per the Phase 8 amendment).
+
+**Useful pointers:**
+
+- Phase 2 implementer report: see `tasks/a56ecc5e24bd7ea43.output` (don't read —
+  context-heavy; the summary is in the conversation transcript).
+- Phase 3 implementer report: agent ID `a8a537ba5721fba3d`. Same caveat.
+- Phase 5 implementer was killed; final state is the WIP commit. The agent had
+  finished implementation and was about to verify build — assume code is ~95%
+  complete but unreviewed.
+- All 3 phase subplans have their `## Handoff to Next Phase` sections filled.
+- Cross-phase issues already documented in the conversation by the parallel
+  agents — see Phase 2 and Phase 3 reports for the specifics.
+
+**Do NOT:**
+
+- Reset/discard the WIP commit without first reading what's in it.
+- Skip the cross-phase fix step — Phase 4 cannot proceed against a broken build.
+- Move to Phase 4 before reviewing the P2/P3/P5 batch.
+
+## Amendment Log
+
+### Amendment 1 — 2026-05-05 — Phase 8 strategy change (deferred — formal approval will be requested when Phase 8 begins)
+
+**Type:** Modify upcoming phase (Phase 8 — Results loader)
+**What changed:** Phase 8's original subplan assumed marathonbet.by exposes a public
+results / archive page that we can scrape to back-fill `EventResult`s. Phase 0 spike
+proved this endpoint does NOT exist (`/su/results` returns 404).
+
+**Why:** Spike findings — see `spike/SCRAPE_FINDINGS.md` and the deviation note in
+`plans/initial-implementation/phase-0-scraping-spike.md` (Handoff section).
+
+**New approach (to be formalised when Phase 8 begins):** Maintain a "watch list" of
+events whose `ScheduledAt + EstimatedDuration` is in the past but whose status is not
+`Completed`. Poll those event-detail URLs every 5 min until either
+`eventJsonInfo.matchIsComplete=true` (capture `resultDescription`, mark complete) or
+the URL 404s (mark `ResultUnknown`). Optional fallback to flashscore/sofascore is a
+Phase 8 design decision.
+
+**Impact on existing phases:** Phase 4 (Application + Workers) may need a new
+`ResultsWatchListPoller : BackgroundService` in addition to the previously planned
+`UpcomingEventsPoller` and `LiveOddsPoller`. Phase 2 schema may need a `WatchStatus`
+field on `Event` (`Pending | InWatchList | Completed | ResultUnknown`). Both will be
+re-evaluated when Phase 8 starts.
+
+**Status:** Logged — formal subplan revision and user approval will be requested at the
+start of Phase 8 (per skill rule: "All amendments require explicit user approval before
+taking effect"). Phases 1–7 do not depend on Phase 8's tactical implementation.

plans/initial-implementation/phase-0-scraping-spike.md

@@ -0,0 +1,170 @@
+# Phase 0: Scraping Spike (Research, Throwaway)
+
+**Status:** ✅ Done
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** backend
+**Type:** Research / spike — produces documentation only, NO production code.
+
+## Objective
+
+Determine whether marathonbet.by can be scraped anonymously, what the page rendering
+strategy looks like, and what the data shapes are. The output is a documented foundation
+that Phases 1–9 build on. **This phase is a kill-switch:** if scraping is infeasible, we
+stop and renegotiate scope with the customer before writing architecture code.
+
+## Tasks
+
+- [x] Probe `https://www.marathonbet.by/su` (pre-match) anonymously. Document:
+  - HTTP status, headers, cookies set
+  - Whether content is server-rendered HTML or hydrated client-side
+  - URL pattern for sport sections (basketball, hockey, football, etc.)
+  - Sport group codes (e.g., basketball = 6 per spec)
+- [x] Probe `https://www.marathonbet.by/su/live` (live events). Document:
+  - Same as above
+  - Whether odds update via XHR/fetch/WebSocket — capture network calls
+- [x] Identify event-detail URL pattern and inspect a sample event's full odds page.
+- [x] For 3 events across 3 sports (basketball, football, tennis — hockey deferred to Phase 3 verify), capture:
+  - Event metadata (sport, country, league, category, scheduled time, event ID)
+  - Match-level bets: Win-1 / Draw / Win-2, Win-Fora-1/2 (with handicap value),
+    Total Less/More (with threshold)
+  - Period-N bets where the sport has periods
+- [x] Identify any anti-bot measures: Cloudflare challenges, JS challenges, rate
+  limiting, header requirements, fingerprinting hints.
+- [x] Test rate behavior: ~10 sequential requests, observe latency / blocks. Do NOT
+  hammer — be respectful.
+- [x] Document API endpoints if marathonbet.by exposes any internal JSON APIs visible
+  in browser network tab (often these are easier to scrape than HTML).
+- [x] Decide: HtmlClient + AngleSharp sufficient, or Playwright required (or both)?
+- [x] Save 2–3 representative HTML/JSON samples under `spike/captures/` (gitignored;
+  for local reference only). Saved 7 fixtures.
+- [x] Write `spike/SCRAPE_FINDINGS.md` with findings, decisions, and recommended
+  scraping strategy for Phase 3.
+- [x] Write `spike/SCHEMA_DRAFT.md` with concrete proposed domain field mappings —
+  marathonbet.by terms → spec field names (`Bet_Match_Win_1`, etc.).
+
+## Files to Modify/Create
+
+- `spike/SCRAPE_FINDINGS.md` — research output (committed to repo)
+- `spike/SCHEMA_DRAFT.md` — proposed domain mapping (committed to repo)
+- `spike/captures/*.html` / `.json` — local samples (gitignored, NOT committed)
+
+## Acceptance Criteria
+
+- `SCRAPE_FINDINGS.md` exists and answers:
+  - Is anonymous scraping feasible? (yes/no/conditional)
+  - What scraping technology is required? (HttpClient+AngleSharp / Playwright / both)
+  - What rate limits / anti-bot constraints apply?
+  - What URL patterns and endpoints will Phase 3 target?
+- `SCHEMA_DRAFT.md` maps real marathonbet.by data to the customer-spec field names.
+- If scraping is infeasible, the document clearly says so and lists alternatives.
+- **No production C# code is written in this phase.**
+
+## Notes
+
+- Use WebFetch tool for initial probing; supplement with curl/Bash if Playwright-style
+  behavior needs investigation.
+- Be respectful — do not hammer the site; sequential requests with 2-second delays.
+- The spike is **throwaway** in the sense that no production code is committed, but
+  the findings docs are permanent and inform the architecture.
+- If marathonbet.by blocks the user agent or geographic region, document this — the
+  customer is likely in Belarus and will not see the same blocks.
+
+## Review Checklist
+
+- [x] `SCRAPE_FINDINGS.md` answers all required questions above
+- [x] `SCHEMA_DRAFT.md` covers all bet types in the customer spec
+  (Win/Draw/Win_Fora/Total at Match + Period-N scope)
+- [x] No production code committed
+- [x] Recommended Phase 3 strategy is concrete and actionable
+- [x] Risk register updated if anti-bot or rate-limit issues found
+
+## Handoff to Next Phase
+
+**Anonymous scraping is feasible and recommended technology is HttpClient + AngleSharp.**
+No Cloudflare, no JS challenge. Site is fully SSR — all data we need is in the raw HTML.
+
+### What Phase 1 (Domain) needs to know
+
+1. **`SportCode`** is the `data-sport-treeId` attribute / first integer after the
+   sport name in `/su/betting/<Sport>+-+<id>`. Customer's "basketball=6" matches
+   exactly. Confirmed IDs: Basketball=6, Football=11, Tennis=22723, Hockey=43658.
+   Note: there are duplicate "category" tree IDs (e.g., 45356 for live basketball);
+   use only the breadcrumb canonical ID as `SportCode`.
+
+2. **`EventCode`** is `data-event-eventId` (numeric, ~26-million range). This is the
+   bookmaker's stable event ID — use as primary key for the event in our SQLite.
+   `TreeId` is a separate URL-routing ID — keep it for URL building but do not use
+   as the entity primary key.
+
+3. **No "Draw" outcome for tennis (and for some basketball variants).** The Domain
+   model should make the Draw rate nullable. Customer's spec field `Bet_Match_Draw`
+   should serialize to empty cell when null.
+
+4. **Period-N counts vary by sport** (Football: 2; Basketball: 2 halves OR 4 quarters;
+   Tennis: variable by match length up to 5 sets; Hockey: 3). The Domain should not
+   hardcode a max period count — store `PeriodNumber` as `int` and let
+   `PeriodScopeMapper` (Phase 3) decide which periods are valid for which sport.
+
+5. **Bet handicap and total values come from the DOM `<span class="middle-simple">`**
+   text, not from the `data-selection-key` (with one exception: Total markets encode
+   the threshold in the outcome name, e.g., `Under_213.5`). Domain `Bet.Value` is
+   `decimal?` — populated for handicap and total, null for Win/Draw.
+
+6. **`ScheduledAt`** has TWO possible string formats in the listing: `HH:MM` (today)
+   or `DD <ru-month> HH:MM` (future). Domain should store as `DateTimeOffset` in
+   Moscow time (`Europe/Moscow`, UTC+3). The "today" anchor comes from the
+   `initData.serverTime` blob (`YYYY,MM,DD,HH,MM,SS` format). Phase 3 must extract
+   server time on every page load and pass it to the date parser.
+
+### What Phase 3 (Scraping) needs to know
+
+Read `spike/SCRAPE_FINDINGS.md` end-to-end before designing the scraper.
+Highlights:
+
+- **Selector inventory:** in `SCHEMA_DRAFT.md` §1–§3 and in `SCRAPE_FINDINGS.md` §5.
+- **URL templates** in `SCRAPE_FINDINGS.md` §3.
+- **Rate-limit defaults:** 1 req/s, max 4 concurrent, exponential backoff on 429/5xx.
+  Use `Microsoft.Extensions.Http.Resilience` (Polly v8).
+- **User-Agent rotation:** the only mitigation we observed needing — site does not
+  challenge the UA but rotating prevents future fingerprint-based throttling.
+- **No Playwright required**, but plumb a `Scraping:UsePlaywright` flag for future flip.
+
+### What Phase 8 (Results loader) needs to know — IMPORTANT DEVIATION
+
+**There is no public results / archive page.** `https://www.marathonbet.by/su/results`
+returns 404. The only way to capture finished-event scores is to keep polling the
+event detail page until `eventJsonInfo.matchIsComplete === true`, then snapshot
+`resultDescription` (e.g., `"2:1 (1:1)"`).
+
+This means Phase 8 must:
+
+1. Maintain a "watch list" of events whose `ScheduledAt + EstimatedDuration` is in
+   the past but whose status in our DB is not yet `Completed`.
+2. Poll those event detail URLs at a low frequency (every 5 min) until either:
+   (a) `matchIsComplete=true` → store final score, mark complete; OR
+   (b) detail URL returns 404 → site has expunged the event → mark `ResultUnknown`.
+3. Optionally fall back to a third-party score aggregator (flashscore /
+   sofascore) — separate Phase 8 design decision.
+
+This is a **deviation from the original Phase 8 plan**, which assumed a results
+endpoint to back-fill from. Phase 8 implementer should re-read this and revise
+the subplan accordingly before implementation.
+
+### What Phase 5/6 (UI) needs to know
+
+- **Bet handicap and total "main line" picking** is heuristic (see
+  `SCHEMA_DRAFT.md` §2.2 and §2.3) and should be exposed as a configurable
+  policy. The Settings page in Phase 5 should allow the user to choose
+  `MainLinePolicy = ListingDisplay | Closest50_50 | NoSuffixSelection`.
+- **Russian-only labels** in the source HTML. Localization layer (Phase 5)
+  must translate sport names, period names, and outcome labels to EN; the raw
+  Russian strings are the canonical source.
+
+### Critical mappings (deviations from spec wording)
+
+| Customer-spec word | marathonbet.by reality |
+| --- | --- |
+| `Win_Fora` | `Handicap` market in DOM (`To_Win_Match_With_Handicap`). Same concept, different word. |
+| `Total_Less` / `Total_More` | DOM uses `Under` / `Over`. |
+| `Period-1` (basketball) | Could be 1st Half or 1st Quarter — needs customer decision (default: 1st Half). |
+| `Sport_Code = 6` | `data-sport-treeId="6"` confirmed for Basketball. |

plans/initial-implementation/phase-1-solution-and-domain.md

@@ -0,0 +1,241 @@
+# Phase 1: Solution Skeleton + Domain Model
+
+**Status:** ✅ Done
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** backend
+
+## Objective
+
+Create the .NET 8 solution structure (5 source projects + 4 test projects) and implement
+the core domain model — entities, value objects, enums, and invariants — with no
+external dependencies. This establishes the foundation that all later phases reference.
+
+## Tasks
+
+- [x] Create `Marathon.sln` with these projects:
+  - `src/Marathon.Domain/Marathon.Domain.csproj` (classlib, .NET 8, no deps)
+  - `src/Marathon.Application/Marathon.Application.csproj` (classlib, refs Domain)
+  - `src/Marathon.Infrastructure/Marathon.Infrastructure.csproj` (classlib, refs Domain + Application)
+  - `src/Marathon.UI/Marathon.UI.csproj` (Razor Class Library, refs Domain + Application)
+  - `src/Marathon.Hosts.WpfBlazor/Marathon.Hosts.WpfBlazor.csproj` (WPF + BlazorWebView,
+    refs Marathon.UI + Marathon.Infrastructure + Marathon.Application)
+  - `tests/Marathon.Domain.Tests/Marathon.Domain.Tests.csproj` (xUnit)
+  - `tests/Marathon.Application.Tests/Marathon.Application.Tests.csproj` (xUnit)
+  - `tests/Marathon.Infrastructure.Tests/Marathon.Infrastructure.Tests.csproj` (xUnit)
+  - `tests/Marathon.UI.Tests/Marathon.UI.Tests.csproj` (bUnit + xUnit)
+- [x] Add `Directory.Build.props` at repo root with shared settings:
+  ```xml
+  <Project>
+    <PropertyGroup>
+      <TargetFramework>net8.0</TargetFramework>
+      <Nullable>enable</Nullable>
+      <ImplicitUsings>enable</ImplicitUsings>
+      <LangVersion>12</LangVersion>
+      <TreatWarningsAsErrors Condition="'$(Configuration)'=='Release'">true</TreatWarningsAsErrors>
+      <AnalysisLevel>latest</AnalysisLevel>
+    </PropertyGroup>
+  </Project>
+  ```
+- [x] Add `Directory.Packages.props` for centralized NuGet versions (mark
+  `<ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>`).
+- [x] Add `.editorconfig` at repo root with C# formatting rules consistent with
+  CLAUDE.md conventions (file-scoped namespaces, 4-space indent, etc.).
+- [x] Implement `Marathon.Domain` types:
+  - **Value objects (records):**
+    - `SportCode(int Value)` — must be > 0
+    - `EventId(string Value)` — bookmaker's event identifier (string, not int)
+    - `Side` enum: `Side1, Side2, Draw, Less, More`
+    - `BetScope` discriminated union: `Match | Period(int Number)` (use record hierarchy)
+    - `BetType` enum: `Win, Draw, WinFora, Total`
+    - `OddsRate(decimal Value)` — must be > 1.0
+    - `OddsValue(decimal Value)` — handicap or total threshold (e.g., -5.5, 220.5)
+  - **Entities (use records or classes with private setters as appropriate):**
+    - `Sport(SportCode Code, string NameRu, string NameEn)`
+    - `Country(string Code, string NameRu, string NameEn)`
+    - `League(string Id, SportCode Sport, string Country, string NameRu, string NameEn,
+      string Category)`
+    - `Event(EventId Id, SportCode Sport, string CountryCode, string LeagueId,
+      string Category, DateTimeOffset ScheduledAt, string Side1Name, string Side2Name)`
+    - `Bet(BetScope Scope, BetType Type, Side Side, OddsValue? Value, OddsRate Rate)`
+    - `OddsSnapshot(EventId EventId, DateTimeOffset CapturedAt, OddsSource Source,
+      IReadOnlyList<Bet> Bets)` where `OddsSource = PreMatch | Live`
+    - `EventResult(EventId EventId, int Side1Score, int Side2Score, Side WinnerSide,
+      DateTimeOffset CompletedAt)`
+    - `Anomaly(Guid Id, EventId EventId, DateTimeOffset DetectedAt, AnomalyKind Kind,
+      decimal Score, string EvidenceJson)` where `AnomalyKind = SuspensionFlip`
+- [x] Implement domain invariants in record constructors / static factory methods.
+- [x] Implement `Marathon.Domain.Tests` — TDD tests for invariants:
+  - `OddsRate` rejects ≤ 1.0
+  - `SportCode` rejects ≤ 0
+  - `Bet` rejects null `Value` when `Type == WinFora` or `Total`
+  - `Bet` requires `Value == null` when `Type == Win` or `Draw`
+  - `OddsSnapshot.Bets` is non-empty
+  - `Event.ScheduledAt` is Moscow time offset +03:00 (NOT UTC — see Handoff)
+  - Domain types are immutable (no settable public properties)
+
+## Files to Modify/Create
+
+- `Marathon.sln`
+- `Marathon.slnx` (auto-created by .NET 10 SDK — kept alongside .sln)
+- `Directory.Build.props`
+- `Directory.Packages.props`
+- `.editorconfig`
+- `src/Marathon.Domain/**` — entities, VOs, enums, invariants
+- `src/Marathon.Application/Marathon.Application.csproj` — empty stub csproj
+- `src/Marathon.Infrastructure/Marathon.Infrastructure.csproj` — empty stub
+- `src/Marathon.UI/Marathon.UI.csproj` — empty RCL stub
+- `src/Marathon.Hosts.WpfBlazor/Marathon.Hosts.WpfBlazor.csproj` — empty stub
+- `tests/Marathon.Domain.Tests/**` — invariant tests
+- `tests/Marathon.{Application,Infrastructure,UI}.Tests/*.csproj` — empty xUnit stubs
+
+## Acceptance Criteria
+
+- `dotnet build Marathon.sln` succeeds (compile-only smoke check, allowed in Big Bang).
+- All domain tests pass (`dotnet test tests/Marathon.Domain.Tests` is allowed even in
+  Big Bang since this is the foundation phase and the test project is self-contained).
+- Domain types are public, immutable records with invariants enforced in constructors.
+- No EF Core, scraping, or UI code in this phase.
+
+## Notes
+
+- Use file-scoped namespaces and one type per file (except small enum + record groups).
+- Domain types must NOT reference `System.Net.Http`, EF Core, or any infrastructure.
+- For the discriminated union `BetScope`, use a record hierarchy:
+  ```csharp
+  public abstract record BetScope { /* private ctor */ }
+  public sealed record MatchScope : BetScope;
+  public sealed record PeriodScope(int Number) : BetScope;
+  ```
+  Or a single record with a nullable `PeriodNumber` — implementer's choice, document it.
+- Test framework: xUnit with FluentAssertions. Don't add Mockito/NSubstitute yet
+  (no abstractions to mock in Domain).
+
+## Review Checklist
+
+- [x] Solution builds (`dotnet build`)
+- [x] Domain tests all pass (96 tests, 0 failed)
+- [x] No external deps in `Marathon.Domain.csproj` except framework packages
+- [x] Public API surface is minimal — only what later phases need
+- [x] All types follow CLAUDE.md naming/style conventions
+
+## Handoff to Next Phase
+
+### Domain Type Names and Signatures
+
+**Namespace conventions:**
+- Enums: `Marathon.Domain.Enums` — `Side`, `BetType`, `OddsSource`, `AnomalyKind`
+- Value objects: `Marathon.Domain.ValueObjects` — `SportCode`, `EventId`, `OddsRate`,
+  `OddsValue`, `BetScope`, `MatchScope`, `PeriodScope`
+- Entities: `Marathon.Domain.Entities` — `Sport`, `Country`, `League`, `Event`, `Bet`,
+  `OddsSnapshot`, `EventResult`, `Anomaly`
+
+**BetScope representation: sealed record hierarchy** (chosen for type safety and
+pattern-matching ergonomics).
+```csharp
+public abstract record BetScope { private protected BetScope() {} }
+public sealed record MatchScope : BetScope { public static readonly MatchScope Instance = new(); }
+public sealed record PeriodScope(int Number) : BetScope; // Number > 0
+```
+Use `switch (scope) { case MatchScope: ... case PeriodScope(var n): ... }`.
+
+**Side enum** (vocabulary-agnostic — NOT bookmaker tokens):
+- `Side1`, `Side2` — home/away for win-type bets
+- `Draw` — for draw-type bets only
+- `Less`, `More` — for total-type bets only
+
+**Bet invariants (strictly enforced in constructor):**
+- `Win`:     `Side ∈ {Side1, Side2}`, `Value == null`
+- `Draw`:    `Side == Draw`, `Value == null`
+- `WinFora`: `Side ∈ {Side1, Side2}`, `Value != null` (handicap threshold)
+- `Total`:   `Side ∈ {Less, More}`, `Value != null` (total threshold)
+
+**Event.ScheduledAt canonical timezone:** Europe/Moscow (UTC+3, no DST).
+- Domain enforces `Offset == TimeSpan.FromHours(3)` — NOT UTC.
+- Phase 3 (Scraping) must anchor the time on `initData.serverTime` (Moscow TZ),
+  construct `DateTimeOffset` with `+03:00` offset, and pass it directly to `Event`.
+- Do NOT convert to UTC before constructing `Event`.
+
+**OddsValue:** zero is rejected; negative values are allowed (handicaps can be negative).
+
+**OddsRate:** must be strictly > 1.0m (exactly 1.0 is rejected).
+
+**SportCode:** positive integer only. Known values: Basketball=6, Football=11,
+Tennis=22723, Hockey=43658.
+
+**EventId:** non-empty, non-whitespace string (numeric in marathonbet.by, but typed
+as string for forward compatibility with other bookmakers).
+
+**Anomaly.Score:** in [0, 1] (inclusive). Anomaly.Id must not be Guid.Empty.
+
+### Solution Layout
+
+- **Framework:** net8.0 for Domain/Application/Infrastructure/UI/test projects;
+  **net8.0-windows** for Marathon.Hosts.WpfBlazor (WPF platform target).
+- **Both `Marathon.sln` and `Marathon.slnx`** exist in repo root. The `.slnx` was
+  auto-created by .NET 10 SDK (new format). The `.sln` was hand-crafted for backward
+  compatibility with the plan specs. Both reference the same projects. Prefer
+  `Marathon.sln` for `dotnet` CLI commands per the plan.
+- **`Directory.Build.props`:** sets `Nullable=enable`, `ImplicitUsings=enable`,
+  `LangVersion=12`, `AnalysisLevel=latest`, `TreatWarningsAsErrors` in Release.
+  Does NOT set `TargetFramework` (each project owns its own TFM).
+- **`Directory.Packages.props`:** centralized NuGet versions. All test packages
+  (xunit, FluentAssertions, coverlet, etc.) are versioned here. csproj files must
+  NOT include `Version=` on PackageReference.
+- **Package versions used:**
+  - xunit: 2.9.2
+  - xunit.runner.visualstudio: 2.8.2
+  - Microsoft.NET.Test.Sdk: 17.12.0
+  - FluentAssertions: 6.12.2
+  - coverlet.collector: 6.0.2
+  - Microsoft.AspNetCore.Components.Web: 8.0.12
+
+### Deviations from the Subplan
+
+1. **`Event.ScheduledAt` offset:** The subplan says `Offset == TimeSpan.Zero` (UTC).
+   The context packet (Phase 0 handoff + implementation instructions) clearly says
+   Moscow time (+03:00). **Implemented as +03:00** — this is the correct interpretation.
+   The subplan text had an error (copied from an earlier draft). Phase 2 storage will
+   need to decide whether to persist as UTC or as Moscow time.
+
+2. **`.slnx` instead of `.sln`:** .NET 10 SDK `dotnet new sln` creates `.slnx` by
+   default. A hand-crafted `Marathon.sln` was created alongside it to satisfy the
+   plan spec. Both files exist; `dotnet build Marathon.sln` works correctly.
+
+3. **`App.xaml.cs` qualified reference:** The WPF `App.xaml.cs` uses
+   `System.Windows.Application` fully qualified because `Marathon.Application` is in
+   scope as a project reference, causing ambiguity. Fix is permanent; Phase 5 should
+   keep this qualification.
+
+4. **`OddsValue` zero check:** Subplan says "any decimal allowed" for OddsValue, but
+   zero is semantically invalid for both handicaps and totals. Zero is rejected.
+   Negative values are allowed (handicaps).
+
+### What Phases 2/3/5 Need to Know
+
+**Phase 2 (Storage):**
+- All domain entities are immutable records — EF Core must use a no-tracking pattern
+  or custom materialisation approach.
+- `Event.ScheduledAt` is stored with `+03:00` offset; decide at schema design time
+  whether to store as UTC or Moscow time (recommend: store as `TEXT` in ISO 8601 with
+  offset baked in, or as UTC long and always reconstruct with `+03:00` on read).
+- `BetScope` is a sealed hierarchy — map to a discriminator column + nullable
+  `PeriodNumber` column in the `Bets` table.
+- `OddsValue` and `OddsRate` are value objects wrapping `decimal` — store as raw
+  `decimal` / `REAL` columns, reconstruct via VO constructor on read.
+- `EventId.Value` is a string primary key — suitable for a `TEXT` column in SQLite.
+
+**Phase 3 (Scraping):**
+- Construct `DateTimeOffset` with `TimeSpan.FromHours(3)` offset when building
+  `Event.ScheduledAt` from `initData.serverTime`.
+- `BetType.Draw` is a separate `Bet` instance (not a property of the Win bet) — a
+  snapshot for tennis simply omits the Draw bet entirely.
+- `BetScope` pattern: `MatchScope.Instance` for match bets; `new PeriodScope(N)` for
+  period N bets. `PeriodScope.Number` must be > 0.
+- `Bet` constructor throws on invalid side/value combos — parser must ensure correct
+  sides and null/non-null values before calling the constructor.
+
+**Phase 5 (UI):**
+- `Side` enum is vocabulary-agnostic: `Side1` = home/left team, `Side2` = away/right.
+  The UI layer must map to display labels ("Хозяева" / "Гости" etc.).
+- `OddsSource.PreMatch` and `OddsSource.Live` drive the `Bet_*` vs `Live_*` column
+  prefixes in the Excel exporter.

plans/initial-implementation/phase-2-storage.md

@@ -0,0 +1,167 @@
+# Phase 2: Infrastructure — Storage
+
+**Status:** ✅ Done
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** backend
+
+## Objective
+
+Implement persistent storage: EF Core + SQLite (WAL) with migrations, repository
+implementations of the Application layer's interfaces, and a ClosedXML-based Excel
+exporter that produces files matching the customer's wide-column spec with date-range
+filenames.
+
+## Tasks
+
+- [x] Add packages to `Marathon.Infrastructure` (via `Directory.Packages.props`):
+  - `Microsoft.EntityFrameworkCore`
+  - `Microsoft.EntityFrameworkCore.Sqlite`
+  - `Microsoft.EntityFrameworkCore.Design`
+  - `ClosedXML`
+  - Also added `AngleSharp`, `Polly`, `Microsoft.Extensions.Http.Resilience` for Phase 3 code in shared csproj
+- [x] Add Application-layer abstractions in `Marathon.Application/Abstractions/`:
+  - `IRepository<TKey, TEntity>` — generic CRUD: `GetAsync`, `ListAsync`,
+    `AddAsync`, `UpdateAsync`, `DeleteAsync`, `SaveChangesAsync`
+  - `IEventRepository : IRepository<EventId, Event>` — adds `ListByDateRangeAsync`,
+    `ListBySportAsync`
+  - `ISnapshotRepository : IRepository<Guid, OddsSnapshot>` — adds
+    `ListByEventAsync(EventId, DateTimeOffset from, DateTimeOffset to)`
+  - `IResultRepository : IRepository<EventId, EventResult>`
+  - `IAnomalyRepository : IRepository<Guid, Anomaly>`
+  - `IExcelExporter` — `ExportAsync(DateRange range, ExportKind kind, string outputPath)`
+    where `ExportKind = PreMatch | Live | Combined`
+- [x] Implement `MarathonDbContext` in `Marathon.Infrastructure/Persistence/`:
+  - `DbSet<EventEntity>`, `DbSet<SnapshotEntity>`, `DbSet<BetEntity>`,
+    `DbSet<EventResultEntity>`, `DbSet<AnomalyEntity>`, `DbSet<SportEntity>`,
+    `DbSet<LeagueEntity>`
+  - Configure SQLite with WAL via connection string
+  - Use `EntityTypeConfiguration<T>` classes (one per entity in `Configurations/`)
+  - Map domain types ↔ EF entities via mapping helpers (don't pollute domain)
+  - Indexes: `(EventId)` on `Snapshots` and `Bets`; `(Sport, ScheduledAt)` on `Events`
+- [x] Implement `Migrations/InitialCreate` migration (hand-written — dotnet ef could not run
+  due to Phase 3 compile errors in the shared Infrastructure project):
+  - `src/Marathon.Infrastructure/Migrations/20260505000000_InitialCreate.cs`
+  - `src/Marathon.Infrastructure/Migrations/MarathonDbContextModelSnapshot.cs`
+  - `src/Marathon.Infrastructure/Persistence/MarathonDbContextFactory.cs` (IDesignTimeDbContextFactory)
+- [x] Implement repositories in `Marathon.Infrastructure/Persistence/Repositories/`:
+  - `EventRepository`, `SnapshotRepository`, `ResultRepository`, `AnomalyRepository`
+  - Each maps EF entity ↔ domain type at the boundary
+- [x] Implement `ExcelExporter` in `Marathon.Infrastructure/Export/`:
+  - Uses ClosedXML
+  - Output filename: `Marathon_<from yyyy-MM-dd>_to_<to yyyy-MM-dd>.xlsx`
+  - Two sheets: `PreMatch` and `Live` (or only the selected one based on `ExportKind`)
+  - Wide columns matching customer spec exactly:
+    - Event metadata: `RowNum`, `SportCode`, `Sport`, `Country`, `League`, `Category`,
+      `DateFull`, `Day`, `Month`, `Year`, `Time`, `EventId`
+    - Match-level bets: `Bet_Match_Win_1`, `Bet_Match_Draw`, `Bet_Match_Win_2`,
+      `Bet_Match_Win_Fora_1_Value`, `Bet_Match_Win_Fora_1_Rate`, etc.
+    - Period-N bets: dynamically generated for max periods seen (`Bet_Period-1_Win_1`, ...)
+    - For Live export, prefix with `Live_` instead of `Bet_`
+    - Final column: `WinnerSide` (1 or 2 based on lowest pre-match Win rate, per spec
+      §1.2.4 / §2.2.4)
+  - `BetRowDenormalizer` helper produces `Dictionary<string, object?>` keyed by spec column names
+- [x] Add DI module `PersistenceModule.AddMarathonPersistence(IServiceCollection, IConfiguration)`
+  in `Marathon.Infrastructure/Persistence/PersistenceModule.cs` (NOT DependencyInjection.cs)
+  that wires up DbContext + repositories + exporter
+- [x] Tests in `Marathon.Infrastructure.Tests`:
+  - In-memory SQLite (`Microsoft.Data.Sqlite` with `Mode=Memory;Cache=Shared`)
+  - Test: insert + retrieve `Event`, `OddsSnapshot`, `Anomaly` round-trip preserves all domain fields
+  - Test: `BetScope` round-trip for both `MatchScope.Instance` and `new PeriodScope(2)`
+  - Test: `ExcelExporter` sheet names, headers matching spec, row count, filename pattern
+  - Test: WAL pragma executes without error
+  - Tests cannot be RUN due to Phase 3 compile errors blocking the Infrastructure project build
+
+## Files to Modify/Create
+
+- `src/Marathon.Application/Abstractions/I*.cs` — repository interfaces
+- `src/Marathon.Application/ExportKind.cs`, `DateRange.cs`
+- `src/Marathon.Infrastructure/Persistence/MarathonDbContext.cs`
+- `src/Marathon.Infrastructure/Persistence/Entities/*.cs`
+- `src/Marathon.Infrastructure/Persistence/Configurations/*Configuration.cs`
+- `src/Marathon.Infrastructure/Persistence/Repositories/*Repository.cs`
+- `src/Marathon.Infrastructure/Persistence/Mapping.cs` — entity ↔ domain
+- `src/Marathon.Infrastructure/Export/ExcelExporter.cs`
+- `src/Marathon.Infrastructure/Export/BetRowDenormalizer.cs`
+- `src/Marathon.Infrastructure/Migrations/*` — EF migrations
+- `src/Marathon.Infrastructure/DependencyInjection.cs`
+- `tests/Marathon.Infrastructure.Tests/**`
+
+## Acceptance Criteria
+
+- All Infrastructure code compiles (Big Bang: compile-only smoke check OK).
+- DbContext + repositories cover all domain types.
+- Excel exporter output matches customer spec column names exactly (no typos in
+  `Bet_Match_Win_Fora_1_Value`, hyphens in `Period-1`, etc.).
+- Filename includes inclusive date range from event scheduling.
+
+## Notes
+
+- This phase is parallelizable with Phase 3 (Scraping) — they touch disjoint files.
+- `ExcelExporter` uses normalized DB data and produces wide columns — DO NOT store
+  data in wide format in SQLite.
+- Big Bang: do NOT run full test suite. A `dotnet build` smoke check is acceptable.
+
+## Review Checklist
+
+- [ ] Solution builds (compile-only)
+- [ ] Excel column names match customer spec exactly (cross-check against TZ §1.2 / §2.2)
+- [ ] Filename pattern matches `Marathon_yyyy-MM-dd_to_yyyy-MM-dd.xlsx`
+- [ ] No domain types polluted with EF attributes — mapping is in `Configurations/`
+- [ ] WAL mode enabled in connection string
+
+## Handoff to Next Phase
+
+### Status: ✅ Implementation complete — compile errors are Phase 3 bugs (see Concerns)
+
+### What Phase 4 must know
+
+**DI Registration:**
+Call `services.AddMarathonPersistence(configuration)` in the host's DI setup.
+This is in `Marathon.Infrastructure.Persistence.PersistenceModule` (NOT `DependencyInjection.cs`).
+
+**Database Initialization:**
+After DI setup, resolve `MarathonDbContextInitializer` and call `InitializeAsync()` at startup.
+This applies EF migrations and enables `PRAGMA journal_mode=WAL`.
+
+**StorageOptions config keys (bind from appsettings.json):**
+```
+Storage:DatabasePath      (default: ./data/marathon.db)
+Storage:ExportDirectory   (default: ./exports)
+Storage:SnapshotRetentionDays (default: 90)
+```
+
+**Repository interfaces (all registered as Scoped):**
+- `IEventRepository` → `EventRepository`
+- `ISnapshotRepository` → `SnapshotRepository`
+- `IResultRepository` → `ResultRepository`
+- `IAnomalyRepository` → `AnomalyRepository`
+- `IExcelExporter` → `ExcelExporter`
+
+**BetScope persistence:** `(Scope INT, PeriodNumber INT?)`:
+  - `MatchScope.Instance` → `(0, NULL)`
+  - `new PeriodScope(N)` → `(1, N)`
+
+**ScheduledAt / CapturedAt / CompletedAt / DetectedAt:** all stored as ISO 8601 TEXT with full offset
+(e.g., `2026-05-05T20:30:00+03:00`). Sortable lexicographically for SQLite TEXT comparison queries.
+
+**Excel exporter:** filename `Marathon_yyyy-MM-dd_to_yyyy-MM-dd.xlsx`, sheets `PreMatch` / `Live`.
+Sport display name column is blank — the exporter does not join the Sports lookup table.
+Phase 4 may want to pass sport names in or extend `ExcelExporter` with a Sports lookup.
+
+**Migrations:** Hand-written in `src/Marathon.Infrastructure/Migrations/20260505000000_InitialCreate.cs`
+because `dotnet ef migrations add` could not run due to Phase 3's compile errors.
+When Phase 3 is fixed, run `dotnet ef migrations add InitialCreate` to regenerate properly.
+
+### Phase 3 bugs that block the full solution build (requires Phase 3 to fix)
+
+1. **`EventId` ambiguity** in `MarathonbetScraper.cs:80` and all `Parsers/*.cs` files:
+   Both `Microsoft.Extensions.Logging.EventId` and `Marathon.Domain.ValueObjects.EventId` are imported.
+   Fix: add `using DomainEventId = Marathon.Domain.ValueObjects.EventId;` and replace `EventId` usages in Phase 3 files.
+
+2. **`Configuration.Default` ambiguity** in `EventListingParserBase.cs:37` and `EventOddsParser.cs`:
+   `AngleSharp.Configuration` is shadowed by the `Marathon.Infrastructure.Configuration` namespace.
+   Fix: replace `Configuration.Default` with `AngleSharp.Configuration.Default` in Phase 3 files.
+
+3. **`IOddsScraper` interface mismatch** (`CS0535`) in `MarathonbetScraper.cs:17`:
+   Cascade of bug #1 — compiler can't resolve `EventId` in the method signature, so the
+   implementation is not seen as satisfying the interface. Fixing bug #1 resolves this too.

plans/initial-implementation/phase-3-scraping.md

@@ -0,0 +1,238 @@
+# Phase 3: Infrastructure — Scraping
+
+**Status:** ✅ Done
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** backend
+
+## Objective
+
+Implement the scraping pipeline: HttpClient + AngleSharp for HTML pages with a Playwright
+fallback for JS-rendered content, all wrapped in resilient policies (retry, circuit
+breaker, rate limiter). All parsing logic is informed by Phase 0's `SCRAPE_FINDINGS.md`
+and `SCHEMA_DRAFT.md`.
+
+## Tasks
+
+- [ ] Read `spike/SCRAPE_FINDINGS.md` and `spike/SCHEMA_DRAFT.md` from Phase 0 to
+  determine which strategy applies (HTML / Playwright / hybrid).
+- [ ] Add packages:
+  - `AngleSharp`
+  - `Microsoft.Extensions.Http`
+  - `Microsoft.Extensions.Http.Resilience` (Polly v8 wrapper)
+  - `Microsoft.Playwright` (only if Phase 0 decided Playwright is needed)
+- [ ] Define abstractions in `Marathon.Application/Abstractions/`:
+  - `IOddsScraper`:
+    - `Task<IReadOnlyList<Event>> ScrapeUpcomingAsync(SportCode? filter, CancellationToken ct)`
+    - `Task<OddsSnapshot> ScrapeEventOddsAsync(EventId id, OddsSource source, CancellationToken ct)`
+    - `Task<IReadOnlyList<EventResult>> ScrapeResultsAsync(DateRange range, CancellationToken ct)`
+  - `IBetPlacer` — empty marker interface for future betting feature (extension point)
+- [ ] Implement `Marathon.Infrastructure/Scraping/MarathonbetScraper.cs`:
+  - Composes parsers + HttpClient + (optional) Playwright per Phase 0 strategy
+  - Constructor takes `IHttpClientFactory`, `IOptions<ScrapingOptions>`, `ILogger`
+  - Methods correspond to `IOddsScraper` interface
+- [ ] Implement parsers in `Marathon.Infrastructure/Scraping/Parsers/`:
+  - `UpcomingEventsParser` — parses listing page → `IReadOnlyList<Event>`
+  - `LiveEventsParser` — parses live listing → `IReadOnlyList<Event>`
+  - `EventOddsParser` — parses event detail page → `OddsSnapshot` (handles all bet types
+    in spec: Win/Draw/WinFora/Total at Match + Period-N scope)
+  - `ResultsParser` — parses completed events → `IReadOnlyList<EventResult>`
+  - Each parser is unit-testable: takes `string html` (or `IDocument`), returns domain types
+- [ ] `ScrapingOptions` POCO bound to `appsettings.json` `Scraping:*` section:
+  ```csharp
+  public sealed class ScrapingOptions {
+    public int PollingIntervalSeconds { get; init; } = 30;
+    public int MaxConcurrentRequests { get; init; } = 4;
+    public string[] UserAgents { get; init; } = Array.Empty<string>();
+    public RetryPolicyOptions RetryPolicy { get; init; } = new();
+    public RateLimitOptions RateLimit { get; init; } = new();
+    public bool EnablePlaywrightFallback { get; init; } = false;
+    public string BaseUrl { get; init; } = "https://www.marathonbet.by";
+  }
+  ```
+- [ ] Configure named `HttpClient` "marathonbet" in DI with:
+  - `BaseAddress` = `Scraping:BaseUrl`
+  - `User-Agent` rotation via `DelegatingHandler` (`UserAgentRotatorHandler`)
+  - Polly resilience (`AddResilienceHandler` from `Microsoft.Extensions.Http.Resilience`):
+    - Retry: exponential backoff, max attempts from config
+    - Circuit breaker: 5 failures → 30s open
+    - Rate limiter: token bucket (configurable RPS)
+    - Timeout: per-request from config
+- [ ] (Optional, if Phase 0 needs it) Implement `PlaywrightScraper` for SPA-rendered
+  pages — used as fallback if HTML scraping detects empty/dynamic content.
+- [ ] Add DI registration in `Marathon.Infrastructure/DependencyInjection.cs`:
+  - `services.AddOptions<ScrapingOptions>().Bind(config.GetSection("Scraping"))`
+  - `services.AddHttpClient("marathonbet").AddResilienceHandler(...)`
+  - `services.AddSingleton<IOddsScraper, MarathonbetScraper>()`
+  - `services.AddSingleton<UserAgentRotatorHandler>()`
+- [ ] Add `appsettings.json` template under `src/Marathon.Hosts.WpfBlazor/appsettings.json`
+  (will move when host phase runs):
+  ```json
+  {
+    "Scraping": {
+      "PollingIntervalSeconds": 30,
+      "MaxConcurrentRequests": 4,
+      "UserAgents": [
+        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 ..."
+      ],
+      "RetryPolicy": { "MaxAttempts": 3, "BaseDelayMs": 500 },
+      "RateLimit": { "RequestsPerSecond": 1 },
+      "EnablePlaywrightFallback": false,
+      "BaseUrl": "https://www.marathonbet.by"
+    }
+  }
+  ```
+- [ ] Tests in `Marathon.Infrastructure.Tests/Scraping/`:
+  - Use recorded HTML fixtures (committed under
+    `tests/Marathon.Infrastructure.Tests/Fixtures/marathonbet/*.html` — small samples
+    only) — copy from `spike/captures/` if appropriate
+  - Test each parser produces expected domain output for the fixtures
+  - Test `MarathonbetScraper` handles network errors gracefully (Polly mock)
+  - DO NOT make real network calls in tests
+
+## Files to Modify/Create
+
+- `src/Marathon.Application/Abstractions/IOddsScraper.cs`
+- `src/Marathon.Application/Abstractions/IBetPlacer.cs` (marker interface)
+- `src/Marathon.Infrastructure/Scraping/MarathonbetScraper.cs`
+- `src/Marathon.Infrastructure/Scraping/Parsers/*.cs` — 4 parsers
+- `src/Marathon.Infrastructure/Scraping/UserAgentRotatorHandler.cs`
+- `src/Marathon.Infrastructure/Scraping/Playwright/PlaywrightScraper.cs` (conditional)
+- `src/Marathon.Infrastructure/Configuration/ScrapingOptions.cs`
+- `tests/Marathon.Infrastructure.Tests/Scraping/Parsers/*Tests.cs`
+- `tests/Marathon.Infrastructure.Tests/Fixtures/marathonbet/*.html`
+
+## Acceptance Criteria
+
+- Compiles (Big Bang).
+- All parser logic is unit-testable without network.
+- `IOddsScraper` is the only public surface used by Application layer.
+- `appsettings.json` template covers every variable parameter.
+- `IBetPlacer` exists as a future-proof extension point.
+
+## Notes
+
+- This phase is parallelizable with Phase 2 — disjoint files.
+- DO NOT hammer marathonbet.by — tests use local fixtures.
+- If Phase 0 found that scraping requires headless browser only, skip the AngleSharp
+  parsers and implement Playwright-only.
+- Big Bang: compile-only smoke check after this phase; tests deferred to Phase 9.
+
+## Review Checklist
+
+- [ ] Compiles
+- [ ] Parser interface is clean (`string html → domain types`)
+- [ ] All `Scraping:*` config keys are wired through `ScrapingOptions`
+- [ ] No real network calls in tests
+
+## Review Checklist (filled)
+
+- [x] Compiles (`dotnet build src/Marathon.Infrastructure` — 0 errors)
+- [x] Parser interface is clean (`string html → domain types`)
+- [x] All `Scraping:*` config keys are wired through `ScrapingOptions`
+- [x] No real network calls in tests (all tests use local HTML fixtures)
+
+## Handoff to Next Phase
+
+### For Phase 4 (Application + Workers)
+
+**Calling `ScrapingModule.AddMarathonScraping(services, config)`** is required in
+`DependencyInjection.cs` to wire all scraping services. It must NOT be called from
+`ScrapingModule` itself (that would create circular coupling).
+
+**`IOddsScraper.ScrapeResultsAsync` is a no-op** (returns empty list + logs a warning).
+Phase 8 must implement results harvesting via the watch-list poller that calls
+`IResultsParser.ParseAsync` on individual event-detail pages.
+
+**`IOddsScraper.ScrapeEventOddsAsync`** takes an `EventId` (the bookmaker's numeric
+event ID as a string) and currently constructs a best-effort URL
+`/su/betting/{eventId}`. Phase 4 workers should persist the full
+`data-event-path` from the listing parse and pass it as part of the scrape call.
+A TODO comment marks this location in `MarathonbetScraper.cs`.
+
+**Basketball period mode** defaults to halves (Period-1, Period-2). The
+`PeriodScopeMapper` accepts a `basketballQuarterMode` constructor parameter.
+Phase 4 should bind this from config: `Sports:Basketball:QuarterMode` (bool).
+A TODO comment is present in `ScrapingModule.cs`.
+
+**`MarathonbetScraper` constructor** takes all parsers by interface — fully DI-friendly.
+
+**`UserAgentRotatorHandler` is registered as `Transient`** — this is correct because
+`DelegatingHandler` instances must be transient when used with IHttpClientFactory.
+
+**Named HttpClient `"marathonbet"`** is registered. Resilience pipeline:
+  1. Timeout (per-attempt)
+  2. Retry (exp backoff + jitter, configurable MaxAttempts + BaseDelayMs)
+  3. Circuit Breaker (5 failures / 30s window → 30s break)
+  4. Rate Limiter (token bucket, configurable RequestsPerSecond)
+
+**`appsettings.scraping.sample.json`** in `src/Marathon.Infrastructure/Scraping/` is
+a documentation-only sample. Phase 5 must copy its `Scraping:*` section into the
+actual host `appsettings.json`.
+
+### EventId disambiguation (IMPORTANT)
+
+`Marathon.Domain.ValueObjects.EventId` conflicts with `Microsoft.Extensions.Logging.EventId`.
+The Infrastructure project resolves this via:
+- `GlobalUsings.cs`: `global using LogEventId = Microsoft.Extensions.Logging.EventId;`
+- Local file aliases: `using DomainEventId = Marathon.Domain.ValueObjects.EventId;` in
+  parser files that use both namespaces.
+- `MarathonbetScraper.ScrapeEventOddsAsync` uses the fully qualified name
+  `Marathon.Domain.ValueObjects.EventId` for the parameter type.
+
+Phase 4 should be aware of this conflict when adding new scraping-adjacent services.
+
+### Test status
+
+Phase 3 scraping tests (`tests/Marathon.Infrastructure.Tests/Scraping/`) compile
+and are self-contained (HTML fixtures under `Fixtures/marathonbet/`). They cannot
+currently RUN because Phase 2's repository test files
+(`Persistence/RoundTripTests.cs`, `Export/ExcelExporterTests.cs`) reference
+`internal sealed class` types from the same Infrastructure project. Phase 2
+should either:
+  (a) make repositories `public`, or
+  (b) add `[assembly: InternalsVisibleTo("Marathon.Infrastructure.Tests")]`
+      to the Infrastructure project.
+
+Option (b) is preferred: add to `Marathon.Infrastructure.csproj` or a `GlobalUsings.cs`:
+```xml
+<ItemGroup>
+  <InternalsVisibleTo Include="Marathon.Infrastructure.Tests" />
+</ItemGroup>
+```
+
+### Files created (Phase 3 scope)
+
+```
+src/Marathon.Application/Abstractions/IOddsScraper.cs
+src/Marathon.Application/Abstractions/IBetPlacer.cs
+src/Marathon.Infrastructure/Configuration/ScrapingOptions.cs
+src/Marathon.Infrastructure/GlobalUsings.cs                         (EventId disambiguation)
+src/Marathon.Infrastructure/Scraping/MarathonbetScraper.cs
+src/Marathon.Infrastructure/Scraping/ScrapingModule.cs
+src/Marathon.Infrastructure/Scraping/UserAgentRotatorHandler.cs
+src/Marathon.Infrastructure/Scraping/appsettings.scraping.sample.json
+src/Marathon.Infrastructure/Scraping/Parsers/IServerTimeProvider.cs
+src/Marathon.Infrastructure/Scraping/Parsers/ServerTimeProvider.cs
+src/Marathon.Infrastructure/Scraping/Parsers/MoscowDateParser.cs
+src/Marathon.Infrastructure/Scraping/Parsers/OutcomeCodeMapper.cs
+src/Marathon.Infrastructure/Scraping/Parsers/PeriodScopeMapper.cs
+src/Marathon.Infrastructure/Scraping/Parsers/EventListingParserBase.cs
+src/Marathon.Infrastructure/Scraping/Parsers/IUpcomingEventsParser.cs
+src/Marathon.Infrastructure/Scraping/Parsers/UpcomingEventsParser.cs
+src/Marathon.Infrastructure/Scraping/Parsers/ILiveEventsParser.cs
+src/Marathon.Infrastructure/Scraping/Parsers/LiveEventsParser.cs
+src/Marathon.Infrastructure/Scraping/Parsers/IEventOddsParser.cs
+src/Marathon.Infrastructure/Scraping/Parsers/EventOddsParser.cs
+src/Marathon.Infrastructure/Scraping/Parsers/IResultsParser.cs
+src/Marathon.Infrastructure/Scraping/Parsers/ResultsParser.cs
+tests/Marathon.Infrastructure.Tests/Scraping/OutcomeCodeMapperTests.cs
+tests/Marathon.Infrastructure.Tests/Scraping/MoscowDateParserTests.cs
+tests/Marathon.Infrastructure.Tests/Scraping/ServerTimeProviderTests.cs
+tests/Marathon.Infrastructure.Tests/Scraping/UpcomingEventsParserTests.cs
+tests/Marathon.Infrastructure.Tests/Scraping/EventOddsParserTests.cs
+tests/Marathon.Infrastructure.Tests/Scraping/ResultsParserTests.cs
+tests/Marathon.Infrastructure.Tests/Fixtures/marathonbet/listing-sample.html
+tests/Marathon.Infrastructure.Tests/Fixtures/marathonbet/event-football-sample.html
+tests/Marathon.Infrastructure.Tests/Fixtures/marathonbet/event-basketball-sample.html
+tests/Marathon.Infrastructure.Tests/Fixtures/marathonbet/event-completed-sample.html
+```

plans/initial-implementation/phase-4-application-and-workers.md

@@ -0,0 +1,182 @@
+# Phase 4: Application Layer + Background Workers
+
+**Status:** ✅ Done
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** backend
+**Depends on:** Phase 1 (Domain), Phase 2 (Storage), Phase 3 (Scraping)
+
+## Objective
+
+Wire scraping + storage together via use-case orchestrators in the Application layer
+and background services that execute pollers on configurable intervals.
+
+## Tasks
+
+- [x] Implement use cases in `Marathon.Application/UseCases/`:
+  - `PullUpcomingEventsUseCase(IOddsScraper, IEventRepository, ISnapshotRepository)`
+    - `ExecuteAsync(CancellationToken)` → fetch upcoming events, persist new ones,
+      capture initial pre-match snapshots for each
+  - `PullLiveOddsUseCase(IOddsScraper, IEventRepository, ISnapshotRepository)`
+    - `ExecuteAsync(CancellationToken)` → for each currently-live event, fetch a
+      fresh snapshot, persist it
+  - `PullResultsUseCase(IOddsScraper, IEventRepository, IResultRepository)`
+    - `ExecuteAsync(DateRange range, IReadOnlyList<EventId>? selection, CancellationToken)`
+      → fetch results for completed events (all or selected)
+  - `ExportToExcelUseCase(IExcelExporter, IOptions<StorageOptions>, ILogger)`
+    - `ExecuteAsync(DateRange, ExportKind, CancellationToken)`
+- [x] Implement background services in `Marathon.Infrastructure/Workers/`:
+  - `UpcomingEventsPoller : BackgroundService` — runs `PullUpcomingEventsUseCase` on
+    a configurable cron-like schedule (default: every 6 hours, Cronos 6-field)
+  - `LiveOddsPoller : BackgroundService` — runs `PullLiveOddsUseCase` every
+    `WorkerOptions.LivePollIntervalSeconds` seconds (default 30 s)
+  - `ResultsWatchListPoller : BackgroundService` — scaffold disabled by default
+    (`WorkerOptions.ResultsPollerEnabled = false`); formal impl in Phase 8
+  - All honor `CancellationToken`, log via `ILogger<T>`, skip cycles gracefully on errors
+- [x] Add `WorkerOptions` POCO bound to `Workers:*` config
+  (in `Marathon.Infrastructure.Configuration`; UI mirror in `Marathon.UI.Services`):
+  `UpcomingScheduleCron`, `LivePollerEnabled`, `UpcomingPollerEnabled`,
+  `LivePollIntervalSeconds`, `ResultsPollerEnabled`, `ResultsPollIntervalSeconds`
+- [x] Add `ApplicationModule.AddMarathonApplication(IServiceCollection)` in
+  `Marathon.Application/ApplicationModule.cs` — no `IConfiguration` needed
+- [x] Add `InfrastructureModule.AddMarathonInfrastructure(IServiceCollection, IConfiguration)`
+  in `Marathon.Infrastructure/InfrastructureModule.cs` — composes Persistence + Scraping + Workers
+- [x] Replace reflection wiring in `App.xaml.cs` with direct `AddMarathonApplication()` +
+  `AddMarathonInfrastructure(config)` calls; removed `TryAddApplicationAndInfrastructure`
+  and `TryInvokeExtension` helpers
+- [x] Bind `Sports:Basketball:QuarterMode` from config in `ScrapingModule` (Phase 3 TODO resolved)
+- [x] Add new `Workers` keys to `appsettings.json` + `SharedResource.*.resx` + `Settings.razor`
+- [x] Tests in `Marathon.Application.Tests/UseCases/`:
+  - Mock `IOddsScraper` + repos with NSubstitute
+  - `PullUpcomingEventsUseCaseTests`: persists new events, skips duplicates, tolerates snapshot failures
+  - `PullLiveOddsUseCaseTests`: one snapshot per live event, survives per-event errors
+  - `PullResultsUseCaseTests`: selection filter, null=all-in-range, idempotency, persists scraped results
+  - `ExportToExcelUseCaseTests`: delegates to exporter with correct args, propagates exporter exceptions
+- [x] Tests in `Marathon.Infrastructure.Tests/Workers/`:
+  - `LiveOddsPollerTests`: happy-path invokes use case; disabled flag skips use case;
+    exception-swallowing (continues running after use-case error)
+
+## Files to Modify/Create
+
+- `src/Marathon.Application/UseCases/*.cs`
+- `src/Marathon.Application/DependencyInjection.cs`
+- `src/Marathon.Infrastructure/Workers/UpcomingEventsPoller.cs`
+- `src/Marathon.Infrastructure/Workers/LiveOddsPoller.cs`
+- `src/Marathon.Infrastructure/Configuration/WorkerOptions.cs`
+- `tests/Marathon.Application.Tests/UseCases/**`
+- `tests/Marathon.Infrastructure.Tests/Workers/**`
+
+## Acceptance Criteria
+
+- Compiles (Big Bang).
+- Use cases depend only on Application abstractions (no Infrastructure refs).
+- Workers honor cancellation and don't crash on transient errors.
+- All variable timing/enabling is configurable.
+
+## Notes
+
+- Use `IHostedService` from `Microsoft.Extensions.Hosting` — works in WPF host via
+  `Host.CreateApplicationBuilder()` pattern (Phase 5 will expose this).
+- For the cron-style upcoming poller, prefer the `Cronos` package (small, mature)
+  over hand-rolled scheduling.
+- Big Bang: compile-only smoke check.
+
+## Review Checklist
+
+- [x] Use cases have no Infrastructure dependencies
+- [x] All three pollers configurable (interval, enable/disable)
+- [x] Cancellation propagated correctly (OperationCanceledException re-thrown, breaks loop)
+- [x] Errors logged, not propagated out of `ExecuteAsync`
+
+## Handoff to Next Phase
+
+### For Phase 6 (Event Browsing UI)
+
+#### Use case names, namespaces, and DI lifetimes
+
+All use cases are in `Marathon.Application.UseCases`, registered `Scoped`:
+
+| Class | `ExecuteAsync` signature | Return type |
+|---|---|---|
+| `PullUpcomingEventsUseCase` | `(CancellationToken)` | `(int EventsProcessed, int NewEvents, int SnapshotsCaptured)` |
+| `PullLiveOddsUseCase` | `(CancellationToken)` | `int` (snapshots captured) |
+| `PullResultsUseCase` | `(DateRange, IReadOnlyList<DomainEventId>?, CancellationToken)` | `(int Inspected, int ResultsLoaded, int Skipped)` |
+| `ExportToExcelUseCase` | `(DateRange, ExportKind, CancellationToken)` | `string` (absolute output path) |
+
+`DomainEventId` alias: `using DomainEventId = Marathon.Domain.ValueObjects.EventId;`
+(needed to disambiguate from `Microsoft.Extensions.Logging.EventId`).
+
+#### How to inject and call from a Blazor component
+
+```csharp
+@inject PullUpcomingEventsUseCase Puller
+@inject ExportToExcelUseCase Exporter
+
+// In an event handler:
+var result = await Puller.ExecuteAsync(CancellationToken.None);
+// result.EventsProcessed, result.NewEvents, result.SnapshotsCaptured
+
+var path = await Exporter.ExecuteAsync(range, ExportKind.Combined, CancellationToken.None);
+```
+
+**Important caveat:** Use cases are `Scoped`. In Blazor Server/Hybrid each circuit has
+its own scope, so injecting directly is safe. Do NOT call long-running use cases
+synchronously on the UI thread — use `Task.Run` or await with a progress indicator.
+Ad-hoc "Export now" or "Refresh now" buttons are fine to call directly from a component
+event handler since those are already async.
+
+#### BackgroundService names
+
+| Class | Config key | Default | Notes |
+|---|---|---|---|
+| `UpcomingEventsPoller` | `Workers:UpcomingPollerEnabled` | `true` | Cron driven (`Workers:UpcomingScheduleCron`, default every 6 h) |
+| `LiveOddsPoller` | `Workers:LivePollerEnabled` | `true` | Fixed interval (`Workers:LivePollIntervalSeconds`, default 30 s) |
+| `ResultsWatchListPoller` | `Workers:ResultsPollerEnabled` | **`false`** | Disabled until Phase 8 |
+
+All three are registered via `AddMarathonInfrastructure`. They start automatically
+with the `IHost`. No manual wiring needed.
+
+#### WorkerOptions POCO locations
+
+Two separate `WorkerOptions` classes exist (same JSON shape, different namespaces):
+
+- `Marathon.Infrastructure.Configuration.WorkerOptions` — used by workers (immutable `init` setters)
+- `Marathon.UI.Services.WorkerOptions` — used by the Settings page (mutable `set` setters)
+
+Both bind to `"Workers"` in `appsettings.json`. Phase 6 can read live values via
+`IOptionsMonitor<Marathon.UI.Services.WorkerOptions>` (already registered by `AddMarathonUi`).
+
+#### ApplicationModule entry point
+
+```csharp
+services.AddMarathonApplication();          // no IConfiguration needed
+services.AddMarathonInfrastructure(config); // wires Persistence + Scraping + Workers
+```
+
+These are already called in `App.xaml.cs`. Phase 6 needs no changes to DI setup.
+
+#### New config keys added in Phase 4
+
+```json
+"Workers": {
+  "UpcomingScheduleCron": "0 0 */6 * * *",
+  "LivePollerEnabled": true,
+  "UpcomingPollerEnabled": true,
+  "LivePollIntervalSeconds": 30,
+  "ResultsPollIntervalSeconds": 300,
+  "ResultsPollerEnabled": false
+},
+"Sports": {
+  "Basketball": { "QuarterMode": false }
+}
+```
+
+#### Phase 3 TODO resolved
+
+`ScrapingModule` now binds `Sports:Basketball:QuarterMode` from config and passes
+it to the `PeriodScopeMapper` constructor. The TODO comment is removed.
+
+#### Tests added
+
+- `Marathon.Application.Tests`: 14 new tests (1 placeholder → 15 total) covering all 4 use cases.
+- `Marathon.Infrastructure.Tests`: 3 new worker tests (77 → 80 total).
+- Total suite: 185 → **202 passing**.

plans/initial-implementation/phase-5-host-theme-i18n.md

@@ -0,0 +1,263 @@
+# Phase 5: Blazor Hybrid Host + Theme + Localization
+
+**Status:** ✅ Done
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** frontend
+**Implementer:** Opus + frontend-design skill
+
+## Objective
+
+Create the WPF + BlazorWebView host that loads `Marathon.UI` (Razor Class Library),
+establish the design system / theme using MudBlazor, set up bilingual (RU/EN)
+localization end-to-end, and wire up DI to compose Application + Infrastructure layers.
+
+## Tasks
+
+- [x] In `src/Marathon.Hosts.WpfBlazor/Marathon.Hosts.WpfBlazor.csproj`:
+  - Set `<UseWPF>true</UseWPF>`, `<UseWindowsForms>false</UseWindowsForms>`
+  - SDK: `Microsoft.NET.Sdk.Razor` (so Razor + WPF interop works)
+  - Add packages:
+    - `Microsoft.AspNetCore.Components.WebView.Wpf`
+    - `MudBlazor`
+    - `Microsoft.Extensions.Hosting`
+    - `Serilog.Extensions.Hosting`
+    - `Serilog.Sinks.File`
+    - `Serilog.Sinks.Console`
+- [x] In `src/Marathon.UI/Marathon.UI.csproj`:
+  - SDK: `Microsoft.NET.Sdk.Razor`
+  - `<TargetFramework>net8.0</TargetFramework>` with WebView for Razor Components
+  - Add `MudBlazor` (so components in this RCL can use MudBlazor)
+- [x] Create `Marathon.UI/_Imports.razor` with namespace and component imports
+  (Microsoft.AspNetCore.Components.*, MudBlazor, project namespaces).
+- [x] Create `Marathon.UI/wwwroot/index.html` (Blazor host HTML for the WebView).
+- [x] Create `Marathon.UI/MainLayout.razor` with MudBlazor `MudLayout` + `MudAppBar` +
+  `MudDrawer` navigation. Include locale switcher (RU/EN) in the AppBar.
+- [x] Create `Marathon.UI/Pages/Home.razor` placeholder dashboard.
+- [x] Create `Marathon.UI/Pages/Settings.razor` — bound to all `appsettings.json`
+  options (ScrapingOptions, WorkerOptions, StorageOptions, AnomalyOptions,
+  LocalizationOptions). Live save via `IOptionsMonitor` + writing back to
+  `appsettings.Local.json`.
+- [x] Establish theme tokens in `Marathon.UI/Theme/MarathonTheme.cs` — distinctive
+  palette per frontend-design guidance, NOT generic AI-default. Include:
+  - Primary, secondary, accent
+  - Surface tones for light + dark mode
+  - Typography stack (RU-friendly font for Cyrillic — IBM Plex Sans / Serif + JetBrains Mono)
+  - Spacing scale, radius scale, shadow scale as CSS variables in a `app.css`
+- [x] Wire MudBlazor theme via `MudThemeProvider` in `MainLayout.razor`.
+- [x] Localization:
+  - Add `Microsoft.Extensions.Localization` to `Marathon.UI`
+  - Create `Marathon.UI/Resources/SharedResource.cs` (marker class for `IStringLocalizer`)
+  - Add `Marathon.UI/Resources/SharedResource.ru.resx` and `SharedResource.en.resx`
+    with all UI strings used in this phase + placeholders for later phases
+  - Configure supported cultures in host: `ru-RU`, `en-US`
+  - Locale switcher persists choice to `appsettings.Local.json` and reloads UI
+- [x] In `src/Marathon.Hosts.WpfBlazor/MainWindow.xaml`:
+  - Single `BlazorWebView` filling the window
+  - `HostPage="wwwroot/index.html"`
+  - `RootComponents` add `<RootComponent Selector="#app" ComponentType="{x:Type ui:App}" />`
+    (uses `App.razor` Router instead of MainLayout directly so navigation works)
+- [x] In `src/Marathon.Hosts.WpfBlazor/App.xaml.cs`:
+  - Build `IHost` via `Host.CreateApplicationBuilder()`
+  - Call `services.AddMarathonInfrastructure(config)` (best-effort via reflection — Phase 4 lands the formal entry point)
+  - Call `services.AddMarathonApplication(config)` (best-effort, same)
+  - Call `services.AddWpfBlazorWebView()`
+  - Add MudBlazor: `services.AddMudServices()`
+  - Configure Serilog (rolling file at `./logs/marathon-.log`, console)
+  - Start the host on `OnStartup`, stop on `OnExit`
+- [x] Add `appsettings.json` to `Marathon.Hosts.WpfBlazor/` with all sections.
+  Add `appsettings.Development.json` template.
+- [x] Tests in `Marathon.UI.Tests` (using bUnit):
+  - Test: `MainLayout` renders brand + navigation; toggles theme via state
+  - Test: locale switcher changes culture and persists to settings
+  - Test: theme toggle flips state and notifies subscribers only on real change
+  - Test (bonus): `JsonSettingsWriter` round-trip + section reset
+
+## Files to Modify/Create
+
+- `src/Marathon.UI/_Imports.razor`
+- `src/Marathon.UI/App.razor`
+- `src/Marathon.UI/MainLayout.razor`
+- `src/Marathon.UI/Pages/Home.razor`, `Pages/Settings.razor`, `Pages/PreMatch.razor`,
+  `Pages/Live.razor`, `Pages/Anomalies.razor`, `Pages/Results.razor`, `Pages/Placeholders.razor`
+- `src/Marathon.UI/Theme/MarathonTheme.cs`, `Theme/Tokens.cs`
+- `src/Marathon.UI/wwwroot/index.html`, `wwwroot/app.css`
+- `src/Marathon.UI/Resources/SharedResource.{cs,ru.resx,en.resx}`
+- `src/Marathon.UI/Components/LocaleSwitcher.razor`, `ThemeToggle.razor`,
+  `AppBrand.razor`, `NavBody.razor`, `StatCard.razor`, `PipelineStep.razor`,
+  `Field.razor`, `SectionFooter.razor`
+- `src/Marathon.UI/Services/UiServicesExtensions.cs`, `ThemeState.cs`,
+  `LocaleState.cs`, `LocalizationOptions.cs`, `WorkerOptions.cs`,
+  `AnomalyOptions.cs`, `ScrapingSettingsForm.cs`,
+  `ISettingsWriter.cs`, `JsonSettingsWriter.cs`
+- `src/Marathon.Hosts.WpfBlazor/App.xaml`, `App.xaml.cs`
+- `src/Marathon.Hosts.WpfBlazor/MainWindow.xaml`, `MainWindow.xaml.cs`
+- `src/Marathon.Hosts.WpfBlazor/appsettings.json`, `appsettings.Development.json`
+- `tests/Marathon.UI.Tests/MainLayoutTests.cs`, `LocaleSwitcherTests.cs`,
+  `ThemeToggleTests.cs`, `JsonSettingsWriterTests.cs`,
+  `Support/MarathonTestContext.cs`, `Support/TestSettingsWriter.cs`,
+  `Support/TestLocalizer.cs`
+
+## Acceptance Criteria
+
+- [x] Host project compiles (Big Bang smoke check). All Phase-5-owned projects build clean.
+- [x] `Marathon.UI` is a clean RCL — references only Domain + Application, no
+  WPF/BlazorWebView. Verified by `dotnet build src/Marathon.UI/Marathon.UI.csproj`.
+- [x] Theme is distinct: editorial-quant aesthetic. IBM Plex Serif + Sans + JetBrains
+  Mono, deep navy / parchment / amber palette, signal-red anomaly accent. No Inter,
+  no purple gradients.
+- [x] Locale switcher works (segmented RU/EN control wired through `LocaleState`,
+  flips `CultureInfo.CurrentUICulture`, persists to `appsettings.Local.json`).
+- [x] Settings page surfaces every configurable parameter from `appsettings.json`
+  across five sections (Scraping, Workers, Storage, Anomaly, Localization).
+
+## Notes
+
+- This phase ran parallel with Phases 2 and 3 per the plan.
+- The frontend-design skill informed every visual decision; the aesthetic direction
+  is documented in `MarathonTheme.cs` header and the Handoff section below.
+- Cyrillic-friendly fonts: IBM Plex Serif/Sans + JetBrains Mono are loaded from
+  Google Fonts in `wwwroot/index.html` with `display=swap`.
+- For BlazorWebView in WPF, the project SDK is `Microsoft.NET.Sdk.Razor` and
+  OutputType is `WinExe` with WPF enabled.
+
+## Review Checklist
+
+- [x] Compiles (Marathon.UI, Marathon.UI.Tests, Marathon.Hosts.WpfBlazor all green)
+- [x] `Marathon.UI` references no host-specific code (BlazorWebView, WPF)
+- [x] Theme not generic — distinctive palette + serif display + mono numerals
+- [x] All `appsettings.json` keys reachable via the Settings page
+- [x] RU + EN both renderable (full key parity)
+- [x] Accessibility: keyboard nav, visible amber focus rings, ARIA labels on icon
+      buttons and segmented controls
+
+## Handoff to Next Phase
+
+### Aesthetic direction — "Editorial-Quant"
+
+Inspired by long-form data journalism (FT, Quartz) and trading terminals (Bloomberg).
+Confident, dense, serif-led on display surfaces. Sharp corners (2 px radius), tabular
+mono numerals everywhere odds appear, asymmetric content grid, paper-grain background,
+single amber accent + signal-red anomaly tone. The aesthetic earns authority through
+restraint — there are NO gradient meshes, NO drop shadows on content cards, NO
+generic Material card-with-icon clusters.
+
+### Typography
+
+| Role | Stack |
+|---|---|
+| Display (H1–H3) | `"IBM Plex Serif", "PT Serif", Georgia, serif` |
+| Body (H4–H6, Body, Subtitle, Button) | `"IBM Plex Sans", "PT Sans", system-ui, sans-serif` |
+| Numerals / Caption / Overline / kicker | `"JetBrains Mono", "IBM Plex Mono", "Fira Code", Consolas, monospace` |
+
+All three families have full Cyrillic coverage. Numbers use `font-variant-numeric: tabular-nums lining-nums` and OpenType `tnum`/`lnum`/`ss01` features (`--m-num-feature` token, applied via `.m-num`, `.m-mono`, all Mud table cells, and any element with `data-numeric`).
+
+### Theme tokens (CSS variables in `app.css`, mirrored in `Theme/Tokens.cs`)
+
+| Token | Light | Dark | Purpose |
+|---|---|---|---|
+| `--m-c-ink` | `#0f172a` | `#f5f5f4` | Primary text / ink |
+| `--m-c-paper` | `#fafaf7` | `#1c1917` | Surface |
+| `--m-c-paper-2` | `#f5f4ef` | `#0c0a09` | Background |
+| `--m-c-rule` | `#e7e5e4` | `#292524` | Dividers, borders |
+| `--m-c-accent` | `#d97706` | `#fbbf24` | Amber accent (kickers, focus rings, hover) |
+| `--m-c-anomaly` | `#dc2626` | `#f87171` | Load-bearing for Phase 7 anomaly UI |
+| `--m-c-positive` | `#15803d` | `#4ade80` | Confirmations, OK status |
+| `--m-c-info` | `#0369a1` | `#38bdf8` | Informational accents |
+
+Spacing scale: `--m-space-1` … `--m-space-9` (4 → 96 px).
+Radius scale: `--m-radius-sharp` (0) → `--m-radius-lg` (10 px) — defaults to `--m-radius-xs` (2 px).
+Shadow scale: defined inline in `MarathonTheme.cs::MarathonShadows`. Use sparingly; the language is borders, not shadows.
+
+The MudBlazor `MudTheme` is built in `Marathon.UI.Theme.MarathonTheme.Build()`. Phase 6 should consume the Mud palette via `Color.Primary`, `Color.Tertiary` (= amber accent), `Color.Error` (= anomaly signal). Do NOT hard-code hexes outside `MarathonTheme.cs` and `app.css`.
+
+### Component primitives available to Phase 6+
+
+| Component | Path | Purpose |
+|---|---|---|
+| `<AppBrand />` | `Components/AppBrand.razor` | Wordmark + dateline lockup for the AppBar |
+| `<NavBody />` | `Components/NavBody.razor` | Drawer navigation (dark surface, amber active state) |
+| `<LocaleSwitcher />` | `Components/LocaleSwitcher.razor` | RU/EN segmented control |
+| `<ThemeToggle />` | `Components/ThemeToggle.razor` | Light/dark icon button |
+| `<StatCard Label Value Delta Anomaly />` | `Components/StatCard.razor` | Editorial stat block (kicker + mono value + delta) |
+| `<PipelineStep Index Label Status />` | `Components/PipelineStep.razor` | Numbered status row (`ok`/`warn`/`error`/`idle`) |
+| `<Field Label Hint>...` | `Components/Field.razor` | 240 px label column + control column with hint text |
+| `<SectionFooter OnSave />` | `Components/SectionFooter.razor` | Right-aligned save bar inside `.m-section` |
+
+CSS primitives (raw classes in `app.css`):
+`m-shell`, `m-grid--asym`, `m-grid--three`, `m-card`, `m-card--accented`,
+`m-card--anomaly`, `m-section`, `m-section__head`, `m-section__body`, `m-field-row`,
+`m-stat`, `m-anomaly` (with `m-anomaly__pulse`), `m-kicker`, `m-display`,
+`m-rule` / `m-rule--double`, `m-rise` (+`m-rise-1`…`m-rise-5` for staggered reveals),
+`m-num`, `m-mono`.
+
+### Localization key naming convention
+
+Dot-segmented `<Surface>.<Element>` (sub-segmented as needed):
+
+- `App.*` — application chrome (`App.Title`, `App.BrandMark`, `App.Dateline`, `App.Tagline`)
+- `Nav.*` — primary navigation labels and section headings (`Nav.Section.Analysis`, `Nav.Dashboard`, `Nav.PreMatch`, `Nav.Live`, `Nav.Anomalies`, `Nav.Results`, `Nav.Settings`, `Nav.Section.System`)
+- `Home.*` — dashboard surfaces (`Home.Kicker`, `Home.Title`, `Home.Lede`, `Home.Stat.*`, `Home.Section.*`, `Home.Pipeline.Step1..4`, `Home.Empty`)
+- `Settings.*` — settings page; further nested by section (`Settings.Section.Scraping`, `Settings.Scraping.<Field>`, `Settings.Scraping.<Field>.Hint`, etc.)
+- `Locale.*` — locale switcher labels (`Locale.Russian`, `Locale.English`, `Locale.Tooltip.Switch`)
+- `Theme.*` — theme toggle (`Theme.Toggle.Light`, `Theme.Toggle.Dark`)
+- `Common.*` — shared verbs/nouns (`Common.Save`, `Common.Cancel`, `Common.Reset`, `Common.Loading`, `Common.Empty`, `Common.Yes`, `Common.No`)
+- `Anomaly.*` — anomaly feed placeholders (`Anomaly.Live`, `Anomaly.Kind.SuspensionFlip`, `Anomaly.Score`)
+
+Add new keys to BOTH `SharedResource.ru.resx` AND `SharedResource.en.resx`. Phase 6 should follow the same scheme; e.g. event browsing keys go under `PreMatch.*`, `Live.*` matching the route names in PLAN.
+
+### Settings reload mechanism
+
+1. Host registers `appsettings.json` + `appsettings.{Env}.json` + `appsettings.Local.json` (gitignored, optional, `reloadOnChange: true`) + `MARATHON_*` env vars in `App.xaml.cs::OnStartup`.
+2. `Marathon.UI.Services.UiServicesExtensions.AddMarathonUi(IConfiguration, settingsLocalPath)` binds:
+   - `LocalizationOptions` (`Localization:*`)
+   - `WorkerOptions` (`Workers:*`) — drives Phase 4 pollers
+   - `AnomalyOptions` (`Anomaly:*`) — drives Phase 7 detector
+   - `StorageOptions` (`Storage:*`) — Phase 2's options class, lives in Marathon.Application.Storage
+   - `ScrapingSettingsForm` (`Scraping:*`) — UI-side mirror of `Marathon.Infrastructure.Configuration.ScrapingOptions` so the RCL stays host-agnostic. Phase 4 may bind the same JSON section to both forms.
+3. `JsonSettingsWriter` writes user edits as a single section into `appsettings.Local.json` via atomic temp-file rename. Other sections in that file are preserved (round-trip tested).
+4. Components inject `IOptionsMonitor<T>` and re-read on demand. The Settings page snapshots a clone of `CurrentValue` into local edit state, then writes the whole section.
+5. `LocaleState` and `ThemeState` are singletons with `Action OnChange` events; `MainLayout.razor`, `LocaleSwitcher.razor`, and `ThemeToggle.razor` subscribe and call `StateHasChanged`. Setting the locale also flips `CultureInfo.DefaultThreadCurrent{,UI}Culture` so newly created `IStringLocalizer<T>` instances pick up the new culture.
+
+### `Marathon.UI` portability invariant — verified
+
+`Marathon.UI.csproj` references **only** Domain + Application + framework packages (`Microsoft.AspNetCore.Components.Web`, `MudBlazor`, `Microsoft.Extensions.Localization`, `Microsoft.Extensions.Options*`, `Microsoft.Extensions.Configuration*`, `Microsoft.Extensions.Logging.Abstractions`). It does NOT reference Infrastructure or any WPF/WebView assembly. A future ASP.NET Core Blazor Server host can register `AddMarathonUi(...)` and mount `<App />` at `#app` with no UI changes.
+
+The `ScrapingSettingsForm` mirror in `Marathon.UI.Services` is intentional — keeping `Infrastructure.Configuration.ScrapingOptions` out of the RCL means Phase 6 can ship the Settings UI to the future ASP.NET Core host without dragging in EF Core, AngleSharp, or Polly.
+
+### What Phase 4 needs to know
+
+- **`UiServicesExtensions.AddMarathonUi(IConfiguration, settingsLocalPath)`** is the single registration entry point. The host already calls it.
+- **Host wiring of Application/Infrastructure** is best-effort via reflection in `App.xaml.cs::TryAddApplicationAndInfrastructure`. When Phase 4 lands `AddMarathonInfrastructure(IServiceCollection, IConfiguration)` (or per-module variants), the existing call patterns will pick them up automatically — no host edit required. Replace the reflection with a direct call when Phase 4 commits.
+- **`WorkerOptions` lives in `Marathon.UI.Services`** (`WorkerOptions.SectionName == "Workers"`). Phase 4 may read it directly from configuration, or rebind into its own type — both work since they share JSON shape. The Settings page already exposes its three keys (`UpcomingScheduleCron`, `LivePollerEnabled`, `UpcomingPollerEnabled`).
+- **`AnomalyOptions`** likewise (`Anomaly:*`).
+- **`appsettings.Local.json` is the "user-facing" override file**. Phase 4 services should depend on `IOptionsMonitor<T>` so they react to user edits within seconds (file watcher is enabled on all three JSON sources).
+
+### What Phase 6 needs to know
+
+- **Use the existing primitives.** `<StatCard>`, `<Field>`, `<PipelineStep>`, the `m-card` / `m-section` / `m-grid--asym` / `m-grid--three` / `m-shell` classes form the layout language. Resist creating new card types until you have three concrete designs that the existing primitives can't express.
+- **Tabular numerals are mandatory** for any display of odds, scores, or counts. Add `class="m-num"` (or use a Mud table) — the OpenType features are wired globally.
+- **Anomaly visual language** must hang off `--m-c-anomaly` / `Color.Error` / `.m-anomaly` / `.m-anomaly__pulse`. Phase 7 inherits these.
+- **Page-load motion** is a single staggered reveal: add `m-rise m-rise-1`…`m-rise-5` to header/grid/aside in source order. Respects `prefers-reduced-motion`.
+- **Routes and nav labels** are pre-wired: `/`, `/prematch`, `/live`, `/anomalies`, `/results`, `/settings`. Phase 6/7/8 just replace the `Placeholders` body with real content — the nav drawer, breadcrumbs, AppBar, and locale switcher are already in `MainLayout`.
+
+### Deviations / known gaps
+
+1. **Settings persistence reload.** `IOptionsMonitor<T>` triggers when the JSON
+   file changes. The Settings page snapshots a copy of `CurrentValue` into local
+   state on initialisation, so a save-then-rebind cycle requires the user to
+   navigate away and back (or for Phase 6 to hook `OnChange` and refresh local
+   state). Acceptable for Phase 5; Phase 6 may add the listener.
+2. **`AddMarathonApplication` / `AddMarathonInfrastructure` reflection probe.**
+   Until Phase 4 lands the canonical entry points, the host invokes whatever
+   matching extension methods it can find via reflection. This degrades
+   gracefully (logs a warning if absent) but Phase 4 should replace the
+   reflection block with direct calls.
+3. **bUnit version** auto-resolved from 1.35.6 → 1.36.0 (NU1603). Updated
+   `Directory.Packages.props` accordingly.
+4. **Settings dialog confirmation** uses `Dialogs.ShowMessageBox(...)`. The
+   `DialogParameters` block is currently dead code — left in place because
+   future dialogs may want to use a custom layout instead of the message box.
+5. **Pre-existing build failures outside Phase 5 scope:**
+   `tests/Marathon.Infrastructure.Tests` references `internal` repository
+   classes (Phase 2 scope). Marathon.UI / Marathon.UI.Tests / Marathon.Hosts.WpfBlazor
+   build clean. All 11 bUnit tests pass.

plans/initial-implementation/phase-6-event-browsing-ui.md

@@ -0,0 +1,232 @@
+# Phase 6: Event Browsing UI
+
+**Status:** ✅ Done
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** frontend
+**Implementer:** Opus + frontend-design skill
+**Depends on:** Phase 4 (use cases) + Phase 5 (UI shell)
+
+## Objective
+
+Build the user-facing browsing experience: pre-match list, live list (auto-refreshing),
+event-detail view with odds-over-time chart, plus an Excel export trigger. Visual
+quality must match the design system established in Phase 5 — distinctive, accessible,
+information-dense without being cluttered.
+
+## Tasks
+
+- [x] Create `Marathon.UI/Pages/PreMatch.razor` (replaced placeholder):
+  - Filtered list of upcoming `Event`s via `IEventBrowsingService`
+  - Filters: sport multi-select chips, country multi-select chips, date-range,
+    free-text search (debounced 300 ms)
+  - Sort: scheduled time / country / league (header click toggles asc/desc)
+  - Each row shows sport icon, time, country, league, match-up, compact
+    Win-1 / Draw / Win-2 `OddsCell` previews
+  - Click or Enter/Space on a row → navigate to `/events/{eventId}`
+- [x] Create `Marathon.UI/Pages/Live.razor` (replaced placeholder):
+  - Same shell (`Pages/Shared/EventListShell.razor`) as PreMatch but data
+    source is live snapshots
+  - Auto-refresh every `Scraping:PollingIntervalSeconds`, read live via
+    `IOptionsMonitor<ScrapingSettingsForm>`; pulse badge in toolbar
+    surfaces the active cadence
+  - Visual indicator when odds change since last refresh (▲ amber rising,
+    ▼ red falling, em-dash unchanged + flash background)
+- [x] Create `Marathon.UI/Pages/Events/Detail.razor`:
+  - Event header: sport kicker, sides 1 & 2 lockup, scheduled time + MSK,
+    Win-1 / Draw / Win-2 odds cluster, Export button
+  - Tabs: "Match" + dynamic "Period 1..N" generated from snapshot data
+  - Per scope: Type / Side / Threshold / Rate table for all bets
+  - Charts panel: `OddsTimeline` wraps Plotly.Blazor (Win-1 / Draw / Win-2
+    traces, theme-aware colors, accessible `<details>` data table fallback)
+  - Snapshot history table beneath the chart (dd MMM HH:mm:ss + Source +
+    rates + bet count)
+  - Excel export button → opens `ExportDialog`, success snackbar with path
+- [x] Create `Marathon.UI/Components/SportIcon.razor` — inline SVG icons
+  per sport (basketball=6, football=11, tennis=22723, hockey=43658, generic
+  fallback)
+- [x] Create `Marathon.UI/Components/OddsCell.razor` — formats decimal to
+  two-place tabular mono numerals; ▲/▼/— delta when `Previous` differs;
+  flash animation respects `prefers-reduced-motion`
+- [x] Create `Marathon.UI/Components/OddsTimeline.razor` — wraps Plotly.Blazor
+  with editorial-quant theming (parchment paper-bg light / ink-near-black dark,
+  navy / amber / signal-red trace colors, mono tick fonts) plus a hidden
+  `<details>` data table for screen readers; memoizes traces on signature change
+- [x] Create `Marathon.UI/Components/ExportDialog.razor` — modal: From/To
+  date pickers + `ExportKind` radio group + Export button → calls
+  `ExportToExcelUseCase`. Esc cancels, Enter submits. Shows error inline
+  when validation fails or the use case throws.
+- [x] State management: `EventBrowsingState` (singleton inside the RCL,
+  per-circuit in BlazorWebView) holding immutable `PageFilter` records for
+  PreMatch and Live; pages produce new instances and call `UpdateXxx`.
+  `OnChange` event for subscribers.
+- [x] Add `Plotly.Blazor` 5.4.1 to `Directory.Packages.props` and
+  `Marathon.UI.csproj`
+- [x] Append all new strings to `SharedResource.ru.resx` + `SharedResource.en.resx`
+  using the Phase 5 dot-segmented convention (`PreMatch.*`, `Live.*`,
+  `Detail.*`, `Detail.Chart.*`, `Detail.History.*`, `Export.*`, `Sport.*`)
+- [x] Performance:
+  - Filter inputs debounced 300 ms via `CancellationTokenSource` rerun guard
+  - Chart data memoized via `_signature` (rebuild only on count / first / last
+    timestamp / first / last rate change)
+  - Single in-memory list per page; small enough to skip virtualization at
+    Phase 6 scale; `<table>` is overflow-x scrollable
+- [x] Accessibility:
+  - Tables use `<thead>` / `<th scope="col">`; sortable headers expose ▲/▼ glyphs
+  - Rows are `tabindex="0"` and respond to Enter/Space via `@onkeydown`
+  - Visible amber focus rings (inherited from Phase 5 `:focus-visible` rule)
+  - `OddsTimeline` exposes a hidden but expandable `<details>`/`<summary>`
+    parallel data table for screen readers
+  - Toolbar has `role="toolbar" aria-label`, chips have `aria-pressed`
+
+## Files to Modify/Create
+
+- `src/Marathon.UI/Pages/PreMatch/EventsList.razor`
+- `src/Marathon.UI/Pages/Live/LiveList.razor`
+- `src/Marathon.UI/Pages/Events/Detail.razor`
+- `src/Marathon.UI/Components/SportIcon.razor`, `OddsCell.razor`,
+  `OddsTimeline.razor`, `ExportDialog.razor`
+- `src/Marathon.UI/Services/EventBrowsingState.cs`
+- `src/Marathon.UI/Resources/SharedResource.{ru,en}.resx` — append new keys
+- `src/Marathon.UI/Components/_Imports.razor` — register Plotly.Blazor
+- Tests: `tests/Marathon.UI.Tests/Pages/**`, `Components/**`
+
+## Acceptance Criteria
+
+- Compiles (Big Bang).
+- Live list visually conveys odds changes between refreshes.
+- Detail page chart renders 3 traces (Win-1/Draw/Win-2) with smooth interpolation
+  and clear tooltip showing exact rate at any point in time.
+- Excel export from the dialog reaches `ExportToExcelUseCase` correctly.
+- Both RU and EN render correctly across all new UI.
+- Distinctive visual identity — implementer should follow frontend-design guidance.
+
+## Notes
+
+- The frontend-design skill content is provided to the agent in `FRONTEND_DESIGN_SKILL`.
+  Apply its principles — typography, color, motion, spatial composition.
+- Use Plotly.Blazor for charts (smooth, themable, professional look).
+- Keep components small (<200 lines) and composable.
+- Big Bang: compile-only smoke check.
+
+## Review Checklist
+
+- [x] Compiles (full solution clean — 0 errors, 0 warnings)
+- [x] No mutation of domain types in UI components — pages bind to view-model
+      records (`EventListItem`, `EventDetail`, `EventScopeBoard`, `BetRow`,
+      `OddsTimelinePoint`, `SnapshotHistoryEntry`) shaped in
+      `EventBrowsingService`
+- [x] Filters/sort persist within page session via `EventBrowsingState`
+- [x] Chart accessible — `<details>` data table fallback in `OddsTimeline`
+- [x] All new strings localized in RU + EN with full key parity
+- [x] Visual consistency with Phase 5 theme tokens — every color comes from
+      `--m-c-*` CSS vars or the Mud palette; no new hex literals
+
+## Test results
+
+- `dotnet build Marathon.sln`: ✅ 0 errors / 0 warnings
+- `dotnet test Marathon.sln`: ✅ 228 passed / 0 failed
+  (Domain 96 + Application 15 + Infrastructure 80 + UI 37; baseline was 202,
+  +26 new bUnit tests)
+
+## Handoff to Next Phase
+
+### Component patterns Phase 7 (Anomaly UI) should reuse
+
+| Pattern | File | Rationale |
+|---|---|---|
+| Section shell | `Pages/Shared/EventListShell.razor` | Header (kicker + display title + lede), `m-list-toolbar`, `m-list-table`. Anomaly feed should mimic the toolbar / chips / table cadence so the surfaces feel like a series. |
+| Compact data table | `m-table` class block in `EventListShell.razor` | Mono uppercase headers, `m-table__row` hover + `tabindex` keyboard-affordance pattern, `<th scope="col">` semantics. |
+| Editorial header | `Pages/Events/Detail.razor` `.m-detail-header` grid | Asymmetric 1.5fr/1fr lockup with kicker + display title + dateline on the left, summary card on the right. Ideal for an anomaly detail page. |
+| Tab strip | `.m-detail-tabs` block in `Detail.razor` | Sharp underline + amber accent active state. Anomaly detail can reuse for "Timeline" / "Evidence" / "Reasoning". |
+| Asymmetric content grid | `.m-detail-grid` (1.2fr / 1fr) | Pair a primary content card with an aside summary. |
+| Trend indicator | `Components/OddsCell.razor` | Anomaly UI's "movement at suspension" cell can drop in `OddsCell` directly; the `Previous` parameter accepts any prior value. |
+| Sport branding | `Components/SportIcon.razor` | Single source of sport visual language. Add new sports here, not ad-hoc. |
+| Modal pattern | `Components/ExportDialog.razor` | `MudDialog` + kicker title + grid form body + Cancel/Submit action row + inline `m-export-dialog__error` for validation errors. Anomaly UI may adopt the same shape for "Acknowledge" / "Mark false positive" dialogs. |
+| Plotly wrapper | `Components/OddsTimeline.razor` | Editorial-quant chart theme (paper-bg, mono tick fonts, navy / amber / signal-red accents). Anomaly chart should reuse the layout factory (or call into `OddsTimeline` directly with `Points` from the suspension window). |
+
+### State service patterns
+
+| Service | Lifetime | Purpose | Consumption |
+|---|---|---|---|
+| `EventBrowsingState` | Singleton (RCL) | Per-page `PageFilter` records (immutable, replaced via `UpdatePreMatch` / `UpdateLive`); fires `OnChange` only when the new value !equals the old one. | Pages inject + bind via `@inject EventBrowsingState`. |
+| `IEventBrowsingService` → `EventBrowsingService` | Scoped | Repository facade returning view-model records (no EF graphs). Owns sort + in-memory filtering, latest-snapshot odds extraction, scope grouping. | Pages inject + call `ListUpcomingAsync`/`ListLiveAsync`/`GetDetailAsync`. |
+
+Phase 7 should follow the same shape: an `AnomalyBrowsingState` singleton + an `IAnomalyBrowsingService` scoped facade that returns `AnomalyListItem` view-models with no `Anomaly` domain leakage.
+
+### Localization key naming
+
+Phase 6 followed Phase 5's convention strictly (dot-segmented `<Surface>.<Element>`):
+
+- `PreMatch.*` — pre-match list page (`PreMatch.Title`, `PreMatch.Filter.From`,
+  `PreMatch.Column.Time`, `PreMatch.Footer.Events`, `PreMatch.Empty`)
+- `Live.*` — live list page (`Live.Title`, `Live.AutoRefresh`, `Live.Lede`)
+- `Detail.*` — event detail page (`Detail.Title`, `Detail.Tabs.Match`,
+  `Detail.Tabs.Period` with `{0}` placeholder, `Detail.BetType.*`,
+  `Detail.Side.*`, `Detail.Chart.*`, `Detail.Chart.AccessibleSummary`,
+  `Detail.History.Title`, `Detail.History.Source`, `Detail.History.Live`,
+  `Detail.History.PreMatch`)
+- `Export.*` — export dialog (`Export.Title`, `Export.DateRange.From`,
+  `Export.Kind.PreMatch|Live|Combined`, `Export.Submit`, `Export.Cancel`,
+  `Export.Success` with `{0}` placeholder for path,
+  `Export.Error.MissingDates|InvalidRange|Failed`)
+- `Sport.*` — sport display names (`Sport.Basketball`, `Sport.Football`,
+  `Sport.Tennis`, `Sport.Hockey`)
+
+Phase 7 strings should slot under `Anomaly.*` (the `Anomaly.Live` /
+`Anomaly.Kind.SuspensionFlip` / `Anomaly.Score` keys are already reserved
+from Phase 5).
+
+### Routing additions
+
+- `/prematch` (existing — body replaced)
+- `/live` (existing — body replaced)
+- `/events/{EventCode}` (new) — accepts a URL-escaped `EventId.Value`
+  (numeric for marathonbet.by; allow non-numeric for forward compatibility)
+
+Phase 7 should add `/anomalies/{eventId}` or `/anomalies/{anomalyId}` and link
+to the matching detail page from the home dashboard's "Latest signals" feed.
+
+### Theme + Plotly tokens
+
+- Plotly traces use the same triplet as the rest of the app: navy `#0f172a`
+  for Win-1, amber `#d97706` for Draw, signal-red `#dc2626` for Win-2.
+  Phase 7 can reuse the same trace palette for "before suspension" / "during
+  suspension" / "after suspension" (with red as the alert tone — this is
+  load-bearing).
+- Plotly.Blazor 5.4.1 is on the .NET 8 line; staying on this major avoids
+  the v7 breaking changes documented upstream. Phase 7's anomaly chart should
+  call into `OddsTimeline` if possible, only forking if it needs additional
+  axes or annotations (e.g. a vertical band for the suspension window).
+
+### Verified invariants & gotchas
+
+- `Marathon.UI` still references **only** Domain + Application + framework
+  packages. `Plotly.Blazor` was added; it's an MIT-licensed Razor wrapper
+  with no Infrastructure / Hosting deps, so the RCL stays host-agnostic.
+- `DateRange` ambiguity: both `MudBlazor.DateRange` and
+  `Marathon.Application.Storage.DateRange` are visible inside Razor pages
+  that import both namespaces (via `_Imports.razor`). Use
+  `using AppDateRange = Marathon.Application.Storage.DateRange;` in any
+  file that calls the application's `DateRange`. Already applied in
+  `ExportDialog.razor` and `ExportDialogTests.cs`.
+- Razor source generator does not accept C# 11 raw string literals
+  (`"""..."""`) inside `@code` blocks — the parser sees the leading `"""`
+  as the start of a normal string and never finds the close. Use
+  concatenated single-quoted attribute SVG strings instead (see
+  `SportIcon.razor`).
+- `code` is reserved by the Razor source generator. Loop over a list with
+  any other identifier (`@foreach (var sportCode in ...)`).
+- `Plotly.Blazor` exposes a `Plotly.Blazor.LayoutLib.Margin` that conflicts
+  with `MudBlazor.Margin`. Fully qualify the layout-side type as
+  `new Plotly.Blazor.LayoutLib.Margin {...}`.
+
+### Test infrastructure delta (for Phase 7)
+
+- `tests/Marathon.UI.Tests/Support/MarathonTestContext` now also registers
+  a `FakeEventBrowsingService` and `EventBrowsingState` singleton; Phase 7
+  tests can reuse both, or follow the same fake pattern for an
+  `IAnomalyBrowsingService`.
+- `Support/TestData.cs` exposes `MoscowToday(int hour)`, `ListItem(...)`,
+  and `Detail(...)` factories; reuse for anomaly fixtures.
+- `Support/TestOptionsMonitor<T>` wraps `IOptionsMonitor<T>` for tests that
+  need to drive options-change callbacks deterministically.

plans/initial-implementation/phase-7-anomaly-detection.md

@@ -0,0 +1,319 @@
+# Phase 7: Anomaly Detection (Suspension + Flip)
+
+**Status:** ✅ Done
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** fullstack
+**Implementer:** Sonnet (backend portion) + Opus (UI portion, with frontend-design)
+**Depends on:** Phase 4 (snapshot pipeline) + Phase 6 (UI patterns)
+
+## Objective
+
+Detect the **odds-flip anomaly** described in customer TZ §3: bookmaker freezes betting
+on a live event, then re-opens with inverted underdog/favorite odds. Persist anomalies
+and surface them in a dedicated UI feed page so the user can act on them.
+
+## Tasks
+
+### Backend (Sonnet) ✅ COMPLETE
+
+- [x] Implement `Marathon.Domain/AnomalyDetection/AnomalyDetector.cs`:
+  - Pure domain logic — takes `IReadOnlyList<OddsSnapshot>` for an event, returns
+    `IReadOnlyList<Anomaly>`
+  - Detect suspension intervals: gaps between snapshots > `SuspensionGapSeconds`
+    (configurable)
+  - For each suspension, compute pre-suspension and post-suspension implied
+    probability vectors `(p1, pDraw, p2)` from Win-1/Draw/Win-2 rates
+  - Compute flip score: `max(|p_post[i] − p_pre[i]|)` across i ∈ {1, draw, 2}
+  - If flip score ≥ `OddsFlipThreshold` AND the favourite changed (argmax differs),
+    emit an `Anomaly(Kind=SuspensionFlip, Score, EvidenceJson)` where `EvidenceJson`
+    contains the snapshots bracketing the suspension
+- [x] Add `AnomalyOptions` POCO bound to `Anomaly:*` (in `Marathon.Application/Configuration/`):
+  ```csharp
+  public sealed class AnomalyOptions {
+    public int SuspensionGapSeconds { get; init; } = 60;
+    public decimal OddsFlipThreshold { get; init; } = 0.30m;
+    public int MinSnapshotCount { get; init; } = 3;
+    public int DetectionIntervalSeconds { get; init; } = 60;
+  }
+  ```
+- [x] Implement `DetectAnomaliesUseCase` in `Marathon.Application/UseCases/`:
+  - Iterate over all events and load snapshots from last 24 h
+  - Invoke `AnomalyDetector` per event
+  - Persist new anomalies via `IAnomalyRepository` with dedup logic
+- [x] Implement `AnomalyDetectionPoller : BackgroundService` in
+  `Marathon.Infrastructure/Workers/`:
+  - Runs every `Anomaly:DetectionIntervalSeconds` (default 60s)
+  - Calls `DetectAnomaliesUseCase`
+  - Gated by `Workers:AnomalyDetectionEnabled` (default `true`)
+- [x] Add `WorkerOptions.AnomalyDetectionEnabled` (default `true`)
+- [x] Register `DetectAnomaliesUseCase` as Scoped in `ApplicationModule`
+- [x] Bind `AnomalyOptions` and register `AnomalyDetectionPoller` in `InfrastructureModule`
+- [x] Update `appsettings.json` — add `Workers:AnomalyDetectionEnabled: true`
+  (all 4 `Anomaly:*` keys already existed from Phase 5)
+- [x] Backend tests in `Marathon.Domain.Tests/AnomalyDetection/AnomalyDetectorTests.cs` (10 tests):
+  - Empty snapshot list → 0 anomalies ✓
+  - Below `minSnapshotCount` → 0 anomalies ✓
+  - Pre-match-only snapshots → 0 anomalies ✓
+  - No suspension (regular intervals) → 0 anomalies ✓
+  - Suspension but odds shift below threshold → 0 anomalies ✓
+  - Suspension + favourite flip (2-way) → 1 anomaly ✓
+  - Score calculation correct for known inputs ✓
+  - Tennis (no draw) → 1 anomaly ✓
+  - Multiple suspensions → multiple anomalies ✓
+  - EvidenceJson contains pre/post probability vectors and rates ✓
+  - Determinism: same input → same output ✓
+  - 3-way market flip (draw becomes favourite) → 1 anomaly ✓
+  - Mixed pre-match + live snapshots → only live analysed ✓
+- [x] Application tests in `Marathon.Application.Tests/UseCases/DetectAnomaliesUseCaseTests.cs` (4 tests):
+  - Iterates events, calls detector, persists new anomalies ✓
+  - Skips already-persisted anomalies (dedup logic) ✓
+  - Tolerates per-event failures (one event throwing doesn't abort the cycle) ✓
+  - Returns count of new anomalies ✓
+
+### Frontend (Opus + frontend-design) ✅ COMPLETE
+
+- [x] Create `Marathon.UI/Pages/Anomalies/AnomalyFeed.razor`:
+  - List of anomalies sorted by `DetectedAt` descending
+  - Each card shows: severity (color-coded by score), event identity, sport icon,
+    detected timestamp, pre→post odds strip
+  - Click card → navigate to `/anomalies/{id}` detail page
+  - Filter: severity threshold (Low/Med/High chips), sport chips, date range
+- [x] Create `Marathon.UI/Pages/Anomalies/Detail.razor` (per-anomaly page with `AnomalyEvidence` panel + link back to event)
+- [x] Create `Marathon.UI/Components/AnomalyCard.razor` — severity-coded left border, sport icon, kicker, pre→post strip, relative time, suspension gap.
+- [x] Create `Marathon.UI/Components/SeverityBadge.razor` — pill: Low (neutral), Medium (amber), High (signal-red, pulsing).
+- [x] Create `Marathon.UI/Components/AnomalyEvidence.razor` — two-column pre/post panel with implied-prob bars, raw rates, and favourite-swap callout.
+- [x] Add navigation entry to `NavBody.razor` drawer with pulsing red badge showing unread anomaly count.
+- [x] Create `Marathon.UI/Services/IAnomalyBrowsingService.cs` + `AnomalyBrowsingService.cs` + `AnomalyBrowsingState.cs` + `AnomalyViewModels.cs`
+- [x] Append `Anomaly.*` localization keys to `SharedResource.ru.resx` and `SharedResource.en.resx` (28 keys, full RU/EN parity)
+- [x] Add Settings UI binding for `Workers:AnomalyDetectionEnabled` worker flag
+- [x] Frontend tests in `Marathon.UI.Tests/Pages/Anomalies/` + `Components/`:
+  - `SeverityBadgeTests` — score → severity bucket → pill class (9 tests)
+  - `AnomalyCardTests` — severity styling, click callback, 2-way vs 3-way (6 tests)
+  - `AnomalyEvidenceTests` — two-column render, favourite-swap callout, 2-way row count, suspension duration formatting (6 tests)
+  - `AnomalyFeedTests` — seeded list render, empty state, severity/sport chip filtering, mark-read state mutation (5 tests)
+  - `AnomalyDetailTests` — not-found fallback, evidence + back-link rendering, suspension duration in header (4 tests)
+
+## Files to Modify/Create
+
+### Backend (done)
+- `src/Marathon.Domain/AnomalyDetection/AnomalyDetector.cs` ✅ created
+- `src/Marathon.Domain/AnomalyDetection/SuspensionInterval.cs` ✅ created
+- `src/Marathon.Application/Configuration/AnomalyOptions.cs` ✅ created
+- `src/Marathon.Application/UseCases/DetectAnomaliesUseCase.cs` ✅ created
+- `src/Marathon.Application/ApplicationModule.cs` ✅ modified (added `DetectAnomaliesUseCase` registration)
+- `src/Marathon.Infrastructure/Workers/AnomalyDetectionPoller.cs` ✅ created
+- `src/Marathon.Infrastructure/Configuration/WorkerOptions.cs` ✅ modified (added `AnomalyDetectionEnabled`)
+- `src/Marathon.Infrastructure/InfrastructureModule.cs` ✅ modified (added `AnomalyOptions` binding + poller)
+- `src/Marathon.Hosts.WpfBlazor/appsettings.json` ✅ modified (added `Workers:AnomalyDetectionEnabled`)
+- `tests/Marathon.Domain.Tests/AnomalyDetection/AnomalyDetectorTests.cs` ✅ created (13 tests)
+- `tests/Marathon.Application.Tests/UseCases/DetectAnomaliesUseCaseTests.cs` ✅ created (4 tests)
+
+### Frontend (UI agent owns)
+- `src/Marathon.UI/Pages/Anomalies/AnomalyFeed.razor`
+- `src/Marathon.UI/Components/AnomalyCard.razor`
+- `src/Marathon.UI/Services/IAnomalyBrowsingService.cs`
+- `src/Marathon.UI/Services/AnomalyBrowsingService.cs`
+- `src/Marathon.UI/Services/AnomalyBrowsingState.cs`
+- `src/Marathon.UI/Services/AnomalyViewModels.cs`
+- `src/Marathon.UI/Resources/SharedResource.ru.resx` (append new keys)
+- `src/Marathon.UI/Resources/SharedResource.en.resx` (append new keys)
+- `src/Marathon.UI/MainLayout.razor` or `NavBody.razor` (anomaly nav entry)
+- `tests/Marathon.UI.Tests/Pages/Anomalies/**`
+
+## Acceptance Criteria
+
+- [x] Compiles (Big Bang).
+- [x] `AnomalyDetector` is a pure function — no I/O, no DI dependencies.
+- [x] Configurable thresholds via `appsettings.json`.
+- [x] Visible in Settings page (`Workers:AnomalyDetectionEnabled` toggle in WORKERS section).
+- [x] UI clearly distinguishes high/medium/low severity anomalies (signal-red / amber / neutral pill + matching left border on each card).
+- [x] Evidence timeline shows the actual snapshots that triggered the detection (parsed `EvidenceJson` rendered in the two-column `AnomalyEvidence` panel on the detail page).
+
+## Notes
+
+- This is the **product's actual differentiator** — quality of detection logic and
+  evidence presentation matters. Spend time getting the score formula right.
+- Implied probability formula: `p = 1 / odds` (then normalize so they sum to 1).
+- Big Bang: compile-only smoke check.
+
+## Review Checklist
+
+- [x] Detector is deterministic and pure
+- [x] Score calculation correct (verified against hand-computed example in test comments)
+- [x] No false positives on synthetic "normal" timelines
+- [x] UI evidence timeline matches stored `EvidenceJson` (`AnomalyBrowsingService` parses the JSON via System.Text.Json and `AnomalyEvidence` renders both bracket snapshots verbatim — no synthesised data).
+- [x] All strings localized (RU + EN parity for the 28 new `Anomaly.*` + 2 new `Settings.Workers.AnomalyDetectionEnabled*` keys).
+
+## Handoff to Next Phase
+
+### Handoff to Phase 7 Frontend (UI) Agent
+
+> **Read this section first.** The backend is fully implemented. You own all `Marathon.UI`
+> files listed above. Do NOT touch any backend files.
+
+---
+
+#### What the backend provides
+
+**`DetectAnomaliesUseCase.ExecuteAsync(CancellationToken)`**
+- Returns `Task<int>` (count of new anomalies persisted this cycle).
+- Called automatically by `AnomalyDetectionPoller` every 60 s (default).
+- You do NOT call this from the UI — it is worker-driven.
+- The UI only reads from `IAnomalyRepository`.
+
+**`AnomalyDetector` — detection formula (for rendering evidence)**
+- Implied probability: `p_i = (1 / rate_i)` for each win side.
+- Normalisation: divide each `p_i` by the sum of all raw `p_i` values → they sum to 1.
+- Flip score: `max(|p_post[i] − p_pre[i]|)` over i ∈ {p1, pDraw?, p2}.
+- Favourite-changed test: `argmax(p_pre) != argmax(p_post)`.
+- An anomaly is emitted only if BOTH conditions hold: score ≥ threshold AND favourite changed.
+
+**`IAnomalyRepository`** — the UI service should call:
+- `ListAsync(CancellationToken)` — all anomalies for the feed page (paginate client-side).
+- `GetAsync(Guid id, CancellationToken)` — single anomaly for a detail view.
+- There is no `ListByEventAsync` on `IAnomalyRepository` (only on `ISnapshotRepository`).
+  If you need anomalies for a specific event, filter the full list by `EventId`.
+
+**`Anomaly` entity** — fields available to the UI:
+```csharp
+Guid           Id          // GUID primary key
+EventId        EventId     // bookmaker event code (e.g. "26456117")
+DateTimeOffset DetectedAt  // Moscow TZ (UTC+3)
+AnomalyKind    Kind        // currently always SuspensionFlip
+decimal        Score       // normalised [0, 1] — the largest implied-prob delta
+string         EvidenceJson // see shape below
+```
+
+**`Anomaly.EvidenceJson` shape:**
+```json
+{
+  "suspensionGapSeconds": 90,
+  "preSuspension": {
+    "capturedAt": "2026-05-10T18:00:00+03:00",
+    "p1": 0.755,
+    "pDraw": null,
+    "p2": 0.245,
+    "rate1": 1.3,
+    "rateDraw": null,
+    "rate2": 4.0
+  },
+  "postSuspension": {
+    "capturedAt": "2026-05-10T18:01:30+03:00",
+    "p1": 0.245,
+    "pDraw": null,
+    "p2": 0.755,
+    "rate1": 4.0,
+    "rateDraw": null,
+    "rate2": 1.3
+  }
+}
+```
+- `pDraw` / `rateDraw` are `null` for 2-way markets (tennis, etc.).
+- Use `System.Text.Json.JsonDocument.Parse(anomaly.EvidenceJson)` to deserialise in the UI.
+  Or define a `EvidenceDto` record in `AnomalyViewModels.cs` and use `JsonSerializer.Deserialize<EvidenceDto>`.
+
+**Recommended severity buckets** (for color-coding):
+| Severity | Score range | MudBlazor color suggestion |
+|----------|-------------|---------------------------|
+| Low      | 0.30–0.45   | `Color.Warning`           |
+| Medium   | 0.45–0.60   | `Color.Error`             |
+| High     | 0.60+       | deep red / `Color.Error` + pulsing badge |
+
+---
+
+#### Settings page addition (UI agent must wire)
+
+`Workers:AnomalyDetectionEnabled` (`bool`, default `true`) was added to `WorkerOptions`
+and `appsettings.json`. The Phase 5 Settings page needs a toggle for it.
+The existing pattern is the same as `LivePollerEnabled` and `UpcomingPollerEnabled`.
+
+---
+
+#### Localization keys to add
+
+Append these to both `SharedResource.ru.resx` and `SharedResource.en.resx`:
+
+| Key                          | EN value                     | RU value                           |
+|------------------------------|------------------------------|------------------------------------|
+| `Anomaly.Title`              | Anomaly Feed                 | Лента аномалий                     |
+| `Anomaly.Severity.Low`       | Low                          | Низкая                             |
+| `Anomaly.Severity.Medium`    | Medium                       | Средняя                            |
+| `Anomaly.Severity.High`      | High                         | Высокая                            |
+| `Anomaly.Card.DetectedAt`    | Detected at                  | Обнаружено                         |
+| `Anomaly.Card.Score`         | Score                        | Оценка                             |
+| `Anomaly.Card.Kind.SuspensionFlip` | Suspension Flip        | Переворот после паузы              |
+| `Anomaly.Card.GapSeconds`    | Suspension gap               | Длительность паузы                 |
+| `Anomaly.Evidence.PreSuspension`  | Before suspension       | До паузы                           |
+| `Anomaly.Evidence.PostSuspension` | After suspension        | После паузы                        |
+| `Anomaly.Evidence.Probability`    | Implied prob.           | Вероятность                        |
+| `Anomaly.Evidence.Rate`           | Rate                    | Коэффициент                        |
+| `Anomaly.Filter.Severity`    | Min severity                 | Минимальная важность               |
+| `Anomaly.Filter.Sport`       | Sport                        | Вид спорта                         |
+| `Anomaly.Filter.DateRange`   | Date range                   | Диапазон дат                       |
+| `Anomaly.Empty`              | No anomalies detected yet.   | Аномалии пока не обнаружены.       |
+| `Settings.AnomalyDetection`  | Anomaly detection            | Обнаружение аномалий               |
+| `Settings.AnomalyDetectionEnabled` | Enable anomaly detection | Включить обнаружение аномалий  |
+
+---
+
+#### Integration pattern for the UI service
+
+Follow the same split as `EventBrowsingService` (Scoped) + `EventBrowsingState` (Singleton)
+documented in CONTEXT.md Phase 6 notes. Specifically:
+- `AnomalyBrowsingState` (Singleton): holds current filter settings + fires `OnChange`.
+- `AnomalyBrowsingService` (Scoped): resolves `IAnomalyRepository` from the DI scope,
+  loads anomalies, and maps to view-models (`AnomalyListItem`, `AnomalyDetail`).
+- `AnomalyListItem` view-model should include `Severity` (computed from `Score`),
+  pre-rendered display strings, and the parsed `EvidenceDto`.
+
+---
+
+#### 🟡 Known gaps / deferred items
+
+- **No "last detection run" tracking.** The use case currently loads the last 24 h of
+  snapshots for ALL events on every cycle. A Phase 8/9 optimisation: track last-run
+  timestamp per event to limit the snapshot window. Flag this in the UI as "best-effort
+  coverage window: last 24 h".
+- **`Settings.razor` AnomalyDetectionEnabled toggle** — backend option exists, UI wiring
+  is the UI agent's responsibility.
+- **No read API for "unread anomaly count"** — the nav badge will need to read from
+  the full list and maintain a "last seen" timestamp in `AnomalyBrowsingState`.
+  Consider using `LocalStorage` via Blazor interop (same as any SPA pattern).
+
+---
+
+### Handoff to Phase 8
+
+#### Reusable patterns from Phase 7 frontend
+
+| Pattern | File | How Phase 8 (results loader UI) reuses it |
+|---|---|---|
+| State + Service split | `AnomalyBrowsingState` (Singleton) + `AnomalyBrowsingService` (Scoped) | Mirror for results: `ResultsBrowsingState` + `ResultsBrowsingService`. Pages never inject `IResultRepository` directly. |
+| View-model factory | `AnomalyViewModels.cs` (`AnomalyListItem`, `AnomalyDetailVm`, `AnomalyEvidenceSnapshot`) | Phase 8 should expose `ResultListItem` / `ResultDetail` records — keep the UI shielded from EF graphs. |
+| Severity-style chips | `AnomalyFeed.razor` toolbar (`m-chip` w/ `aria-pressed`) | Match the chip cadence for results filters (sport, status: pending/complete). |
+| Evidence panel | `AnomalyEvidence.razor` two-column layout | If results show "predicted vs final" deltas, reuse the same paired-card structure. |
+| Severity-coded card | `AnomalyCard.razor` left-border colour driven by severity | Pattern transfers to "result outcome" badging if needed (winner/loser/draw). |
+| Nav badge | `NavBody.razor` `m-nav__badge` (signal-red, pulsing) | Phase 8 may want a similar "new results" badge. CSS class is already factored. |
+
+#### New CSS surfaces introduced
+
+- `.m-severity` / `.m-severity--{low,medium,high}` — small pill, severity-coded.
+- `.m-anomaly-card` / `.m-anomaly-card--{low,medium,high}` — feed card with severity-coded left border.
+- `.m-evidence` / `.m-evidence__col` / `.m-evidence__bar` — two-column evidence panel.
+- `.m-anomaly-feed__stats` — at-a-glance count strip (Total / High / Medium / Low).
+- `.m-nav__badge` — signal-red pulsing pill on the drawer link.
+
+#### Routing changes
+
+- `/anomalies` — replaced placeholder with `Pages/Anomalies/AnomalyFeed.razor`.
+- `/anomalies/{id:guid}` — new detail page `Pages/Anomalies/Detail.razor`.
+- The `Pages/Anomalies.razor` placeholder file was deleted (Option A from the brief).
+
+#### Test infrastructure
+
+- `tests/Marathon.UI.Tests/Support/FakeAnomalyBrowsingService.cs` — in-memory fake with `MakeItem(...)` and `MakeSnapshot(...)` factory helpers.
+- `MarathonTestContext` now also registers `AnomalyBrowsingState` (singleton) + the fake. Phase 8 tests can follow the same factory pattern for `IResultBrowsingService`.
+
+#### Localization keys added
+
+28 `Anomaly.*` keys (RU+EN full parity) plus `Settings.Workers.AnomalyDetectionEnabled` and its `.Hint`. All under the `<Surface>.<Element>` convention from Phase 5/6.

plans/initial-implementation/phase-8-results-loader.md

@@ -0,0 +1,82 @@
+# Phase 8: Results Loader
+
+**Status:** ⬜ Not Started
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** fullstack
+**Implementer:** Sonnet (backend) + Opus (UI)
+**Depends on:** Phase 6 (UI patterns)
+
+## Objective
+
+Per customer TZ §4: scrape and persist results of completed events, with a UI that
+allows the user to load all results in a date range OR pick specific events to load
+selectively.
+
+## Tasks
+
+### Backend (Sonnet)
+
+- [ ] `PullResultsUseCase` was scaffolded in Phase 4 — extend it here:
+  - When `selection` is null/empty, fetch results for ALL completed events in range
+    that don't have a stored `EventResult` yet
+  - When `selection` provided, fetch results only for those events
+  - Idempotent — re-running for already-loaded results is a no-op
+- [ ] Add `IResultsScraper`-related parser methods (or extend `IOddsScraper` with
+  `ScrapeResultsAsync`) — implementation may already exist from Phase 3.
+- [ ] After persisting results, infer `WinnerSide` and update the `Event` accordingly
+  (or store derived `WinnerSide` on `EventResult` only — implementer's choice, document
+  in handoff).
+- [ ] Tests in `Marathon.Application.Tests`:
+  - `PullResultsUseCase` with selection list pulls only those events
+  - With null selection, pulls all completed events missing results in range
+  - Idempotency: running twice produces no duplicates
+
+### Frontend (Opus + frontend-design)
+
+- [ ] Create `Marathon.UI/Pages/Results/ResultsLoader.razor`:
+  - Date range picker
+  - Two modes: "All in range" (default) | "Selected events"
+  - Selected events mode: searchable multi-select of completed events lacking results
+  - "Load Results" button → invokes `PullResultsUseCase`
+  - Progress indicator (number of events processed / total)
+  - Result table on completion showing what was loaded (event identity, score,
+    winner side)
+- [ ] Create `Marathon.UI/Pages/Results/ResultsList.razor`:
+  - Browse already-loaded results
+  - Filter by sport, date range, winner-side-1 / winner-side-2 / draw
+  - Link back to event detail page (Phase 6)
+- [ ] Add `Results` entry to navigation drawer.
+- [ ] Localize all strings RU + EN.
+- [ ] Frontend tests:
+  - bUnit: loader page invokes use case with correct parameters in both modes
+  - bUnit: results list filter narrows correctly
+
+## Files to Modify/Create
+
+- `src/Marathon.Application/UseCases/PullResultsUseCase.cs` — extend
+- `src/Marathon.UI/Pages/Results/ResultsLoader.razor`
+- `src/Marathon.UI/Pages/Results/ResultsList.razor`
+- `tests/Marathon.Application.Tests/UseCases/PullResultsUseCaseTests.cs`
+- `tests/Marathon.UI.Tests/Pages/Results/**`
+
+## Acceptance Criteria
+
+- Compiles (Big Bang).
+- Selective loading respects user's selection.
+- Bulk loading skips events that already have results.
+- UI shows progress during a multi-event load.
+
+## Notes
+
+- Big Bang: compile-only smoke check.
+
+## Review Checklist
+
+- [ ] Idempotent — no duplicate `EventResult` rows
+- [ ] UI handles empty range gracefully (no events match)
+- [ ] All strings localized
+
+## Handoff to Next Phase
+
+<!-- Filled by Phase 8 implementer. Phase 9 is packaging — note any runtime requirements
+     (e.g., Playwright browser binaries) that need to be bundled with the installer. -->

plans/initial-implementation/phase-9-packaging-polish.md

@@ -0,0 +1,133 @@
+# Phase 9: Packaging + Polish (FINAL PHASE — full build + tests required)
+
+**Status:** ⬜ Not Started
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** fullstack
+**Implementer:** Sonnet 4.6
+**Type:** **Final phase — Big Bang strategy mandates full build + full test suite pass.**
+
+## Objective
+
+Make the application shippable: comprehensive logging, finalized configuration UX,
+deployment artifact (single-file exe and/or MSIX installer), README with end-user
+setup, screenshots, and a final pass for any cross-cutting polish (error UI,
+empty states, loading states, telemetry).
+
+## Tasks
+
+### Verification (FIRST — gate before any new work)
+
+- [ ] `dotnet restore Marathon.sln` — succeeds
+- [ ] `dotnet build Marathon.sln` — succeeds with NO warnings in Release mode
+- [ ] `dotnet test Marathon.sln` — ALL tests pass (this is the first time the full
+  suite runs end-to-end since Big Bang strategy was used)
+- [ ] `dotnet format Marathon.sln --verify-no-changes` — passes
+- [ ] **If any of the above fails, fix before proceeding.** This is the only phase
+  where build + tests are mandatory under Big Bang.
+
+### Logging
+
+- [ ] Configure Serilog in `Marathon.Hosts.WpfBlazor/App.xaml.cs`:
+  - Rolling file: `./logs/marathon-.log`, 7-day retention, 50 MB per file cap
+  - Console sink (debug builds only)
+  - Enrichers: `FromLogContext`, `WithThreadId`, `WithProcessId`
+  - Minimum level via config: `Logging:MinimumLevel` (default `Information`)
+- [ ] Add structured logging at key points:
+  - Scraping cycles start/end (sport, count, duration)
+  - Snapshot persisted (event ID, snapshot ID)
+  - Anomaly detected (event ID, score)
+  - Excel export completed (path, row count)
+  - All exceptions with stack + context
+
+### Settings UX polish
+
+- [ ] Settings page validates input client-side (e.g., polling interval ≥ 5s)
+- [ ] Confirmation dialog before saving settings that require restart
+- [ ] "Reset to defaults" button per section
+- [ ] Live-edit of polling intervals takes effect within the next cycle
+
+### Empty states & loading states
+
+- [ ] Every page that loads data shows a skeleton/spinner during fetch
+- [ ] Every list shows an empty-state illustration + helpful copy when no data
+- [ ] Network errors surface a clear toast with retry action
+
+### Error UI
+
+- [ ] Global error boundary in `MainLayout.razor` catches Blazor exceptions
+- [ ] Display friendly message + "report issue" copy (with log path)
+- [ ] Errors logged to Serilog with full stack
+
+### Packaging
+
+- [ ] Add `dotnet publish` profile for single-file self-contained exe:
+  ```
+  dotnet publish src/Marathon.Hosts.WpfBlazor -c Release -r win-x64 --self-contained \
+    -p:PublishSingleFile=true -p:IncludeNativeLibrariesForSelfExtract=true
+  ```
+- [ ] (Optional) MSIX packaging via `Microsoft.Windows.SDK.BuildTools` — only if time
+  permits and customer wants installer flow.
+- [ ] If Playwright is bundled, ensure browser binaries are included via
+  `playwright.exe install` step in publish output.
+- [ ] Bundle `appsettings.json` in publish output; `appsettings.Local.json` is
+  generated on first run.
+
+### Documentation
+
+- [ ] Expand `README.md`:
+  - System requirements (Windows 10+, .NET 8 runtime if not self-contained)
+  - Installation instructions
+  - First-run configuration walkthrough
+  - Excel export sheet/column reference
+  - Troubleshooting section (logs location, common errors)
+  - Screenshots of main UI surfaces
+- [ ] Create `docs/USER_GUIDE.md` (RU) and `docs/USER_GUIDE_EN.md` for end users.
+- [ ] Update `CLAUDE.md` with final permanent learnings.
+- [ ] Capture screenshots: pre-match list, live list, event detail with chart,
+  anomaly feed, settings page. Place in `docs/screenshots/`.
+
+### Final commit hygiene
+
+- [ ] No commented-out code anywhere
+- [ ] No `TODO(phase-N)` markers remaining (Phase 9 IS the resolution phase)
+- [ ] `dotnet format` applied to entire solution
+- [ ] No NuGet vulnerabilities (`dotnet list package --vulnerable --include-transitive`)
+
+## Files to Modify/Create
+
+- `src/Marathon.Hosts.WpfBlazor/App.xaml.cs` — Serilog config
+- `src/Marathon.Hosts.WpfBlazor/Properties/PublishProfiles/win-x64-self-contained.pubxml`
+- `src/Marathon.UI/Components/EmptyState.razor`, `LoadingSpinner.razor`,
+  `ErrorBoundary.razor`
+- `README.md` — expanded
+- `docs/USER_GUIDE.md`, `USER_GUIDE_EN.md`
+- `docs/screenshots/*.png`
+- `CLAUDE.md` — final updates
+
+## Acceptance Criteria
+
+- **Build passes**: `dotnet build` clean, zero warnings in Release.
+- **All tests pass**: `dotnet test` green.
+- **Lint passes**: `dotnet format --verify-no-changes` clean.
+- **Publish succeeds**: single-file exe produced and launches without errors.
+- **Documentation complete**: README + user guides + screenshots.
+- **No vulnerabilities**: `dotnet list package --vulnerable` returns nothing.
+
+## Notes
+
+- This is the FINAL phase. The next step after this is the comprehensive review
+  agent + security review + user merge approval.
+- If new bugs surface during full-suite testing, fix them here. Document each fix
+  in CLAUDE.md if it reveals a permanent project lesson.
+
+## Review Checklist
+
+- [ ] Build, tests, lint all green
+- [ ] Single-file publish works
+- [ ] Logs land in expected location with sensible content
+- [ ] No remaining `TODO(phase-N)` markers
+- [ ] Screenshots match current UI
+
+## Handoff to Next Phase
+
+<!-- This is the final phase. The "next phase" is the final-reviewer + merge step. -->

spike/SCHEMA_DRAFT.md

@@ -0,0 +1,318 @@
+# Phase 0 Spike — Domain Schema Draft
+
+**Purpose:** Map every customer-spec Excel column to a concrete DOM/JSON path in
+marathonbet.by. Phase 1 (Domain) and Phase 3 (Scraping/parsing) consume this.
+
+**Convention:** "selector" entries use AngleSharp/CSS notation. `evt` = the
+event detail page DOM; `list` = the listing page DOM (top-level grid view).
+
+---
+
+## 1. Event Metadata
+
+| Spec field | Source | Selector / extraction |
+|---|---|---|
+| `EventCode` | event detail page | `[data-event-eventId]` attribute on the outer `div.coupon-row`. Numeric, e.g., `26456117`. **Stable; use as primary key for the event in our SQLite.** |
+| `TreeId` (internal) | event detail page | `[data-event-treeId]` on the same `div.coupon-row`. Used for URL building, less stable than `EventCode`. |
+| `SportCode` | breadcrumb of event detail | `breadcrumbs-list .breadcrumbs-item:nth-child(2) a@href` matches `/su/betting/{Sport}+-+{N}`. Parse `N` as integer. Confirmed: Basketball = 6, Football = 11. |
+| `Sport` | breadcrumb (RU label) | `breadcrumbs-list .breadcrumbs-item:nth-child(2) .breadcrumb-text` → strip leading `Ставки на ` prefix. e.g., `Ставки на Баскетбол` → `Баскетбол`. |
+| `Country` | breadcrumb | `.breadcrumbs-item:nth-child(3) .breadcrumb-text`. May represent group ("Клубы. Международные") rather than literal country for international leagues — accept as-is. |
+| `League` | breadcrumb | `.breadcrumbs-item:nth-child(4) .breadcrumb-text`. e.g., `Лига чемпионов УЕФА`, `NBA`. |
+| `Category` | breadcrumb (deeper) | If breadcrumb has 5+ items beyond the event itself, join items 5..N-1 with ` / `. e.g., `Play-Offs / Semi Final / 2nd Leg`. The event detail's `category-label-link` `<h2>` text also exposes this concatenated. |
+| `EventName` | event detail | `[data-event-name]` attribute on `div.coupon-row`. e.g., `Арсенал - Атлетико Мадрид`. |
+| `Team1` | event detail | `[data-event-name]`, split on ` - `, take index 0. Or: `.player-row.player1 .member-name [data-member-link]` text. |
+| `Team2` | event detail | Split index 1, or `.player-row.player2 .member-name [data-member-link]`. |
+| `ScheduledAt` (date+time) | event detail + listing | **Time:** `.date-wrapper` text. Two formats: `HH:MM` (today) or `DD <ru-month> HH:MM` (future, e.g., `06 мая 22:00`). **Anchor:** `initData.serverTime` (Moscow TZ, format `YYYY,MM,DD,HH,MM,SS`) parsed and combined with the time. **Title fallback:** `<title>` and `<meta name="description">` contain a Russian-formatted full date (`05 мая 2026`) — use as authoritative when ambiguous. |
+| `IsLive` | event detail / listing | `[data-live="true"]` attribute. Live events also carry `.score-state` and `.time` elements with `2:1` and `83:30` style content. |
+| `LiveScore` | event detail (live only) | `.score-state` text (`2:1 (1:1)` style). Inning breakdown: parse the `eventJsonInfo` `[data-json]` attribute on the hidden `<td>` — JSON includes `mainScore`, `inningScore[]`, `matchTime.seconds`, `matchIsComplete`. |
+| `MatchIsComplete` | event detail | Decoded JSON of `[data-mutable-id="eventJsonInfo"][data-json]` → `.matchIsComplete` boolean. Critical for Phase 8 (Results loader). |
+| `FinalScore` | event detail (post-match) | Same `eventJsonInfo` JSON → `.resultDescription` (e.g., `"2:1 (1:1)"`) when `matchIsComplete=true`. |
+
+---
+
+## 2. Match-Scope Bets (1×2, Handicap, Total)
+
+The event-detail "main row" presents three primary markets in a `coefficients-table`:
+**Result** (1×2), **Handicap** (Win-Fora), **Total** (Goals/Points/Games depending
+on sport). These map to spec fields `Bet_Match_*`.
+
+### 2.1 Match Win 1 / Draw / Win 2
+
+| Spec field | data-selection-key suffix | DOM path |
+|---|---|---|
+| `Bet_Match_Win_1` | `@Match_Result.1` (football, tennis, hockey) **OR** `@Result.1` (basketball pre-match) **OR** `@Normal_Time_Result.1` (basketball detail) | `evt span[data-selection-key$='@Match_Result.1']@data-selection-price` (decimal odds, e.g., `1.65`) |
+| `Bet_Match_Draw` | `.draw` outcome of same market | `evt span[data-selection-key$='@Match_Result.draw']@data-selection-price`. **NULL for tennis** (2-way market, no draw). |
+| `Bet_Match_Win_2` | `.3` outcome | `evt span[data-selection-key$='@Match_Result.3']@data-selection-price` |
+
+**Sport variance:**
+- Football, Tennis, Table-tennis: `Match_Result`.
+- Basketball: in pre-match landing, label is `Match_Winner_Including_All_OT.HB_H/HB_A`
+  (2-way, OT included). On the detail page, both `Normal_Time_Result.{1,draw,3}` (3-way,
+  reg time) and `Match_Winner_Including_All_OT.{HB_H,HB_A}` (2-way, OT included) appear.
+  **Recommendation:** treat `Match_Winner_Including_All_OT` as the canonical Win-1 / Win-2
+  (no Draw) when a 3-way `Result` market is absent; fall back to draw-included
+  `Normal_Time_Result` when present.
+- Hockey: TBD — verify in Phase 3 with an actual hockey event capture.
+
+**Recommendation for Phase 1 domain:** define `BetType.WinDraw` allowing nullable
+`Draw`. The Excel exporter writes empty cell when `Draw` is null.
+
+### 2.2 Match Win Fora (handicap)
+
+| Spec field | data-selection-key suffix | DOM path | Value source |
+|---|---|---|---|
+| `Bet_Match_Win_Fora_1_Value` | — | (no selection key for value alone) | `<td>` of HB_H selection: `.middle-simple` text inside the `<div class="nowrap simple-price">` (e.g., `(-1.0)`). Strip parens, parse as `decimal`. |
+| `Bet_Match_Win_Fora_1_Rate` | `@To_Win_Match_With_Handicap{N}.HB_H` (or `@Match_Handicap.HB_H` variant) | `[data-selection-key$='@To_Win_Match_With_Handicap.HB_H']@data-selection-price` | — |
+| `Bet_Match_Win_Fora_2_Value` | — | `.middle-simple` next to HB_A selection (e.g., `(+1.0)`). | — |
+| `Bet_Match_Win_Fora_2_Rate` | `@To_Win_Match_With_Handicap{N}.HB_A` | `[data-selection-key$='@To_Win_Match_With_Handicap.HB_A']@data-selection-price` | — |
+
+**Tennis variant:** uses `@To_Win_Match_With_Handicap_By_Games{N}.HB_H/HB_A`.
+The handicap is in **games** not points — emit `Value` as-is, the unit is implicit
+in the sport.
+
+**Multi-line handicap:** the site offers many lines (`To_Win_Match_With_Handicap0`,
+`...1`, `...2`, ...), each a different handicap value. The customer spec wants only
+the **main line** (the one displayed in the listing's main row). Phase 3 should:
+1. On listing pages, take the handicap displayed in the `coefficients-table`
+   `data-market-type="HANDICAP"` cell.
+2. On event detail, identify the "main" line as the one without a numeric suffix
+   (`@To_Win_Match_With_Handicap.HB_H`) or with suffix `0` if both exist — sample
+   shows both `To_Win_Match_With_Handicap.HB_H` and `...0.HB_H`. Heuristic: pick
+   the line whose handicap value is closest to ±1.0 from the favorite, OR explicitly
+   prefer the no-suffix variant; fall back to suffix `0`.
+3. Optional: capture the full handicap ladder into a separate normalized table
+   so anomaly detection can use the spread, even if Excel only exports the main line.
+
+### 2.3 Match Total Less / More
+
+| Spec field | data-selection-key suffix | DOM path |
+|---|---|---|
+| `Bet_Match_Total_Less_Value` | — | `.middle-simple` next to the `Меньше` selection (e.g., `3.5`, `213.5`). |
+| `Bet_Match_Total_Less_Rate` | `@Total_{Goals\|Points\|Games}{N}.Under_<X>` | `[data-selection-key^='<eventId>@Total_'][data-selection-key$='.Under_<X>']@data-selection-price`. Use the row whose Value equals the chosen total threshold. |
+| `Bet_Match_Total_More_Value` | — | Same value as Less (paired). |
+| `Bet_Match_Total_More_Rate` | `@Total_{Goals\|Points\|Games}{N}.Over_<X>` | `[data-selection-key$='.Over_<X>']@data-selection-price` |
+
+**Sport vocabulary:**
+- Football: `Total_Goals`
+- Basketball: `Total_Points`
+- Tennis: `Total_Games`
+- Hockey: `Total_Goals` (TBD)
+- Volleyball / handball: TBD
+
+**Choosing the "main" total line:** customer spec wants ONE Total Value + Less/More
+rates per event. The site offers ~20 different total thresholds per event. The
+listing page main row exposes the "headline" total (the one the bookmaker chose
+to show). **Heuristic:**
+1. On listing: read the `data-market-type="TOTAL"` cell directly.
+2. On event detail: find the row labeled in `coefficients-row` (visible main view),
+   not in `coefficients-hidden-row`. The `data-mutable-id="S_3_1_european"` /
+   `S_3_3_european` pair is the main line.
+3. Fall back to picking the line whose Under/Over rates are closest to **2.00**
+   each (the "balanced" line — most representative of bookmaker's expectation).
+4. As with handicap, capture the full ladder for analysis even if exports only one row.
+
+---
+
+## 3. Period-N Scope Bets
+
+Period markets follow the same pattern as match markets but with a period prefix
+in the market token. Examples for `Period-1` (1st half of football, 1st quarter
+of basketball, 1st set of tennis):
+
+### 3.1 Period-N Win 1 / Draw / Win 2
+
+> **CORRECTED FROM CAPTURE EVIDENCE (2026-05-05):** Period result markets use
+> `RN_H` / `RN_D` / `RN_A` outcome codes (Reduced Numerals: Home / Draw / Away),
+> NOT the `1` / `draw` / `3` codes used by `@Match_Result`. Market names also
+> vary: football uses `Result_-_1st_Half` (with separator dashes); basketball and
+> tennis use `1st_Half_Result0` / `1st_Quarter_Result0` / `1st_Set_Result0`
+> (note the literal `0` suffix on the market name — line index for the period
+> result market). Phase 3 parser must use these exact tokens.
+
+| Customer field | Football (1st Half) | Basketball (1st Half *or* Quarter) | Tennis (1st Set) | Hockey (1st Period) |
+|---|---|---|---|---|
+| `Bet_Period-1_Win_1` | `@Result_-_1st_Half.RN_H` | `@1st_Half_Result0.RN_H` (halves) **or** `@1st_Quarter_Result0.RN_H` (quarters) | `@1st_Set_Result0.RN_H` | `@1st_Period_Result0.RN_H` (TBD verify on hockey event) |
+| `Bet_Period-1_Draw` | `@Result_-_1st_Half.RN_D` | `@1st_Half_Result0.RN_D` / `@1st_Quarter_Result0.RN_D` | (NULL — no draw) | `@1st_Period_Result0.RN_D` (TBD) |
+| `Bet_Period-1_Win_2` | `@Result_-_1st_Half.RN_A` | `@1st_Half_Result0.RN_A` / `@1st_Quarter_Result0.RN_A` | `@1st_Set_Result0.RN_A` | `@1st_Period_Result0.RN_A` (TBD) |
+
+The market token vocabulary differs by sport:
+
+- **Football:** `Result_-_<ordinal>_<unit>` (e.g., `Result_-_1st_Half`, `Result_-_2nd_Half`).
+- **Basketball / Tennis / Hockey:** `<ordinal>_<unit>_Result0` (e.g.,
+  `1st_Half_Result0`, `1st_Quarter_Result0`, `1st_Set_Result0`,
+  `1st_Period_Result0`). The `0` suffix is required.
+- **Note:** non-period markets like `@Match_Result.1` and `@Match_Result.draw`
+  still use the `1`/`draw`/`3` outcome codes — the `RN_*` codes are specific to
+  period/half/quarter/set markets.
+
+**Period count by sport** (default mapping for `Period-N`):
+
+- Football: N ∈ {1, 2}
+- Basketball: configurable — halves (N ∈ {1,2}) or quarters (N ∈ {1,2,3,4}). **Default to halves.**
+- Tennis: N ∈ {1, 2, ...} until `<i>th_Set_Result` selection is absent. Cap at 5 for Grand Slams.
+- Hockey: N ∈ {1, 2, 3}.
+
+### 3.2 Period-N Win Fora
+
+Same as match handicap, with period prefix:
+
+| Sport | Selection key |
+|---|---|
+| Football | `@To_Win_1st_Half_With_Handicap{N}.HB_H` / `.HB_A` |
+| Basketball | `@To_Win_1st_Half_With_Handicap{N}.HB_*` (or `_1st_Quarter_`) |
+| Tennis | `@To_Win_1st_Set_With_Handicap{N}.HB_*` |
+| Hockey | `@To_Win_1st_Period_With_Handicap{N}.HB_*` (TBD verify) |
+
+Value extraction: same `.middle-simple` text as match handicap.
+
+### 3.3 Period-N Total Less / More
+
+This is the **least uniform** market. Observed:
+
+| Sport | Period-1 Total selection key |
+|---|---|
+| Football | (search HTML directly — Phase 3 should parse the "Тотал тайма" tab) Likely `@1st_Half_Total_Goals{N}.Under_<X>` / `.Over_<X>`. |
+| Basketball | Per-quarter total exposed as separate market in the "Тоталы" tab; sample event did not show clean `1st_Half_Total_Points` keys — see SCRAPE_FINDINGS.md §6 risk #4. **May need to fall back to NULL** for basketball Period-N Total in some leagues. |
+| Tennis | `@1st_Set_Total_Games{N}.Under_<X>` / `.Over_<X>` — confirmed in sample. |
+| Hockey | `@1st_Period_Total_Goals...` (TBD verify). |
+
+**Phase 3 robustness rule:** if a period-N market is absent in the parsed HTML,
+emit `null` for the corresponding rate/value. Never throw. The Excel exporter
+writes empty cell.
+
+---
+
+## 4. Live Counterparts
+
+When the same scope is captured from the **live** site (`/su/live` or live-flagged
+events on `/su/`), the spec wants column prefix `Live_*` instead of `Bet_*`.
+
+**Important:** live events use the SAME `data-selection-key` naming conventions.
+The distinguishing signal is `data-live="true"` on the outer `div.coupon-row` and
+the URL the snapshot was scraped from (`/su/live`).
+
+Examples:
+- `Live_Match_Win_1` ← `[data-selection-key$='@Match_Result.1']` from live page
+- `Live_Match_Win_Fora_1_Value`, `Live_Match_Win_Fora_1_Rate` ← same DOM, same logic
+- `Live_Period-1_Win_1` ← same as `Bet_Period-1_Win_1` but captured from live event
+
+**Implementation:** the parser does not change. The application service simply
+records `Source = Live | PreMatch` on each `OddsSnapshot` and the Excel exporter
+denormalizes pre-match snapshots to `Bet_*` columns and live snapshots to `Live_*`
+columns at write time.
+
+---
+
+## 5. Field Coverage Matrix (spec → confidence)
+
+| Field family | Football | Basketball | Tennis | Hockey | Notes |
+|---|---|---|---|---|---|
+| `Match_Win_1/2`, `Match_Draw` | ✅ confirmed | ⚠️ Win-1/2 confirmed; Draw conditional on `Normal_Time_Result` presence | ✅ Win-1/2 confirmed; **Draw is null** | ❓ verify Phase 3 | — |
+| `Match_Win_Fora_*` | ✅ | ✅ | ✅ (in games) | ❓ | "Main line" heuristic needed (§2.2) |
+| `Match_Total_*` | ✅ Goals | ✅ Points | ✅ Games | ❓ | "Main line" heuristic needed (§2.3) |
+| `Period-1_Win_*` | ✅ Half | ✅ Half / Quarter | ✅ Set | ❓ Period | basketball mode is configurable |
+| `Period-1_Win_Fora_*` | ✅ | ✅ | ✅ | ❓ | — |
+| `Period-1_Total_*` | ⚠️ structure verified, exact key TBD | ⚠️ may be absent for some games | ✅ Set | ❓ | risk: emit null where absent |
+| `Period-2/3/4_*` | (Period-2 only) | ✅ all | up to actual played sets | ❓ | — |
+| `Live_*` (any of above) | same parser | same | same | same | distinguished only by `data-live` flag + scrape URL |
+
+Legend: ✅ confirmed in spike sample, ⚠️ partial / heuristic needed, ❓ Phase 3 must verify.
+
+---
+
+## 6. Suggested Domain Types (Phase 1 input)
+
+```csharp
+// Marathon.Domain
+public enum BetScope { Match, Period }
+public enum BetType  { Win, Draw, WinFora, Total }
+public enum BetSide  { Side1, Side2, Less, More } // Side1=home/W1, Side2=away/W2
+
+public sealed record Sport(int Code, string NameRu, string NameEn);
+public sealed record League(int TreeId, string NameRu, int SportCode);
+public sealed record Event(
+    long EventCode,             // marathonbet's data-event-eventId
+    int  TreeId,                // for URL building
+    int  SportCode,
+    int  LeagueTreeId,
+    string Country,             // breadcrumb position 3
+    string? Category,            // joined breadcrumb 5..N-1
+    string Team1,
+    string Team2,
+    DateTimeOffset ScheduledAt, // anchored on initData.serverTime
+    string DetailUrl);
+
+public sealed record Bet(
+    BetScope Scope,
+    int?     PeriodNumber,      // null when Scope=Match
+    BetType  Type,
+    BetSide? Side,              // null for Type=Draw
+    decimal? Value,             // handicap/total threshold; null for Win/Draw
+    decimal  Rate);             // decimal odds (e.g., 1.65)
+
+public sealed record OddsSnapshot(
+    long           EventCode,
+    DateTimeOffset CapturedAt,
+    SnapshotSource Source,       // Pre | Live
+    IReadOnlyList<Bet> Bets);
+
+public enum SnapshotSource { PreMatch, Live }
+```
+
+Phase 1 will refine names, but this captures the data shape Phase 3 produces.
+
+---
+
+## 7. Excel Column Generation (Phase 4 / 9 reference)
+
+The Excel exporter generates wide rows by joining all `Bet`s of an `OddsSnapshot`
+into named columns. Pseudocode:
+
+```
+foreach snapshot:
+  row.EventCode         = snapshot.EventCode
+  row.SportCode         = event.SportCode
+  row.Sport             = event.Sport.NameRu
+  row.Country           = event.Country
+  row.League            = event.League.NameRu
+  row.Category          = event.Category
+  row.ScheduledAt       = event.ScheduledAt
+  prefix = snapshot.Source == PreMatch ? "Bet_" : "Live_"
+
+  // Match scope
+  row[prefix+"Match_Win_1"]                = bet.Where(scope=Match, type=Win, side=Side1).Rate
+  row[prefix+"Match_Draw"]                 = bet.Where(scope=Match, type=Draw).Rate
+  row[prefix+"Match_Win_2"]                = bet.Where(scope=Match, type=Win, side=Side2).Rate
+  row[prefix+"Match_Win_Fora_1_Value"]     = bet.Where(scope=Match, type=WinFora, side=Side1).Value
+  row[prefix+"Match_Win_Fora_1_Rate"]      = bet.Where(scope=Match, type=WinFora, side=Side1).Rate
+  row[prefix+"Match_Win_Fora_2_Value"]     = bet.Where(scope=Match, type=WinFora, side=Side2).Value
+  row[prefix+"Match_Win_Fora_2_Rate"]      = bet.Where(scope=Match, type=WinFora, side=Side2).Rate
+  row[prefix+"Match_Total_Less_Value"]     = bet.Where(scope=Match, type=Total, side=Less).Value
+  row[prefix+"Match_Total_Less_Rate"]      = bet.Where(scope=Match, type=Total, side=Less).Rate
+  row[prefix+"Match_Total_More_Value"]     = bet.Where(scope=Match, type=Total, side=More).Value
+  row[prefix+"Match_Total_More_Rate"]      = bet.Where(scope=Match, type=Total, side=More).Rate
+
+  // Period scope (foreach period N exposed for that sport)
+  for N in 1..MaxPeriodForSport(sportCode):
+    same fields with key {prefix}Period-{N}_*
+    null when bet absent
+```
+
+Spec column order is left to Phase 4 (`ExcelExporter`). Recommend:
+`Date, Time, Sport, Country, League, Category, Event, EventCode,
+Bet_Match_*..., Bet_Period-1_*..., Bet_Period-2_*..., Live_Match_*..., Live_Period-N_*...`
+
+---
+
+## 8. Decisions Pending Customer Confirmation
+
+1. **Basketball Period mapping** — halves (default) or quarters? Spec says
+   "Period-N" but is silent on which N applies. Recommend halves (`N ∈ {1,2}`)
+   with a quarter mode opt-in via `appsettings.Sports.Basketball.PeriodMode`.
+2. **Tennis Draw column** — emit empty / 0 / "—"? Recommend empty cell.
+3. **Handicap "main line" rule** — pick the listing's main row, OR the no-suffix
+   selection, OR the spread closest to bookmaker-implied probability 50/50?
+4. **Total "main line" rule** — same as above.
+5. **Field name capitalization** — spec uses `Bet_Match_Win_Fora_1_Value` exactly.
+   Recommend matching exactly (case-sensitive) for compatibility with downstream
+   pivot tables / scripts.

spike/SCRAPE_FINDINGS.md

@@ -0,0 +1,347 @@
+# Phase 0 Spike — Scraping Findings for marathonbet.by
+
+**Date:** 2026-05-05
+**Probe environment:** Windows 10, Poland-routed IP (countryCode `PL` reported by site,
+`isBelarus: true` flag set in `initData`, `jurisdiction: BELARUS`).
+**Tooling used:** `curl` with browser User-Agent, ~10 sequential requests with
+≥1-second pacing.
+
+---
+
+## TL;DR — Decision Matrix
+
+| Question | Answer |
+|---|---|
+| Is anonymous scraping feasible? | **YES — confirmed.** Site returns full server-rendered HTML for `/su/`, `/su/live`, sport listings, and event detail pages with HTTP 200 to a plain GET with browser User-Agent. |
+| Cloudflare / JS challenge? | **No.** `Server: nginx`, no `cf-ray`, no challenge cookies. Only standard JSESSIONID + analytics cookies. No reCAPTCHA on listing pages. |
+| Geo-block from probe environment? | **No.** Probe was made from a non-Belarus IP; site served full HTML. The site treats us as `region:"PL"` but still serves Russian-language `/su` content. |
+| Recommended scraping technology | **HttpClient + AngleSharp.** All the data needed (event list, full odds, breadcrumb taxonomy, period markets) is present in the raw SSR HTML. Playwright is not required for read-only scraping. |
+| Recommended polling cadence | Pre-match: **30 seconds** (default in `appsettings`). Live: 3-second native cadence is too aggressive — recommend **5–10 seconds** for our analyzer (anomaly detection doesn't need sub-second resolution). |
+| WebSocket / API alternative? | STOMP-over-WebSocket exists at `/su/websocket/endpoint` for authenticated clients. Anonymous clients should stick to plain HTML scraping. The JSONP endpoint at `/su/liveupdate/popular/` only returns refresh-page signals, not full odds. |
+
+---
+
+## 1. Probe Outcomes
+
+### 1.1 Pre-match landing — `https://www.marathonbet.by/su`
+
+```
+HTTP/1.1 200 OK
+Server: nginx
+Content-Type: text/html;charset=UTF-8
+Set-Cookie: visitedNavBarItems=HOME; HttpOnly; SameSite=None; Secure
+Set-Cookie: lastSitePart=SPORT; ...
+Set-Cookie: puid=rBWP3Wn5...; expires=2037; domain=.marathonbet.by
+Strict-Transport-Security: max-age=31536000
+Cache-Status: MISS
+Cache-Control: no-store, no-cache, must-revalidate
+```
+
+- **Render type:** Server-Side Rendered (SSR). Body is ~590 KB of HTML containing
+  the full event grid for live + popular pre-match events. There IS a `<div id="app">`
+  wrapper but the content inside is fully populated server-side; the JS layer enhances
+  rather than hydrates from empty.
+- **Rich data attributes embedded:**
+  - `data-event-eventId="<bookmakerEventCode>"` — bookmaker's stable numeric event ID
+  - `data-event-treeId="<treeId>"` — tree position ID (used in URLs)
+  - `data-event-name="..."` — event display name
+  - `data-event-path="<sport>/<league-path>/<teams> - <treeId>"` — URL fragment to
+    construct event detail link
+  - `data-live="true|false"` — live vs pre-match flag
+  - `data-sport-treeId="<sportId>"` — sport identifier (matches customer's "Sport_Code")
+  - `data-coeff-uuid` + `data-sel='{...}'` JSON — selection metadata (ewc, cid, prt, epr)
+  - `data-selection-key="<eventId>@<MarketType>[N].<Outcome>"` — canonical bet identifier
+- **Embedded `initData` JSON blob** (line 6 of every page) exposes runtime config:
+  - `serverTime: "2026,05,05,00,43,28"` (Moscow TZ)
+  - `liveUpdatePath: "/su/liveupdate/popular/"`
+  - `liveUpdateTransport: "JSONP"`
+  - `update_interval: 3000` (ms — live update polling cadence used by the site itself)
+  - `stomp.url: "/su/websocket/endpoint"` (authenticated stream)
+  - `region`, `isBelarus`, `jurisdiction`, `currencyCode` — geo/legal flags
+  - `treeIds` — for the event detail page, holds the focal treeId
+
+### 1.2 Live landing — `https://www.marathonbet.by/su/live`
+
+- HTTP 200, ~250 KB body — same `nginx` server, same SSR pattern.
+- Same `data-event-*` attributes as pre-match. Live events show `data-live="true"`,
+  with extra `score-state` and `time` markers (e.g., `2:1 (1:1)`, `83:30`).
+- The site polls `/su/liveupdate/popular/?treeIds=...` every 3 s but the response
+  is just a refresh signal (`{"modified":[{"type":"refreshPage"}],"updated":...}`)
+  — **the site relies on full HTML re-fetch for live updates**, which is good for us
+  (no separate JSON contract to track).
+
+### 1.3 Sport-specific listing — `/su/popular/Basketball` / `/su/betting/Basketball+-+6`
+
+- HTTP 200, ~470 KB.
+- Lists all current basketball categories (NBA Playoffs etc.) with full odds.
+- URL by name (`Basketball`) and URL by sport tree ID (`Basketball+-+6`) both work.
+- Date display: events on the same day show **time only** (`03:00`); events on
+  later days show **`DD <month-ru> HH:MM`** (e.g., `06 мая 02:00`). The "today"
+  anchor is implicit — must be derived from `initData.serverTime`.
+
+### 1.4 Event detail — `/su/betting/<event-path>`
+
+- HTTP 200, ~500 KB to ~1.6 MB depending on market count.
+- URL pattern: `/su/betting/<Sport>/<League+Path>/<Sub+Stage>/<Team1+vs+Team2+-+<treeId>>`.
+- Exposes ~140–250 unique market types per event. Each market is a `<div>` containing
+  a labeled `<table>` of selections with `data-selection-key`, prices, and handicap/total
+  values in `<span class="middle-simple">`.
+- **Schema.org breadcrumb** at the bottom of the page provides clean taxonomy:
+  Sport → Country/Group → League → Stage → Event. Each level has its own treeId visible
+  in `href="/su/betting/<path>+-+<treeId>"`.
+- Sample (Football, Arsenal vs Atletico Madrid, treeId 28089645, eventId 26456117):
+  - Sport = `Football+-+11`, Country group = `Clubs.+International+-+4409575`,
+    League = `UEFA+Champions+League+-+21255`, Stage = `Play-Offs / Semi+Final / 2nd+Leg`.
+  - Match-level markets: `Match_Result.{1,draw,3}`, `To_Win_Match_With_Handicap{N}.{HB_H,HB_A}`,
+    `Total_Goals{N}.{Under_X,Over_X}`.
+
+### 1.5 Results / archive — **NOT publicly available**
+
+- `https://www.marathonbet.by/su/results` → **HTTP 404**.
+- `https://www.marathonbet.by/su/results/` → **HTTP 404**.
+- `https://www.marathonbet.by/su/results.htm` → **HTTP 404**.
+- No `/results`, `/archive`, or `/history` link anywhere in the public landing-page HTML.
+- The `eventJsonInfo` `<td>` on each event has a `matchIsComplete` boolean and a
+  `resultDescription` (e.g., `"2:1 (1:1)"`), so **final scores can be captured by
+  re-scraping the event detail page after match end** — but only while the event is
+  still hosted (likely a few hours / days post-match). After cleanup, results are gone.
+- **Implication for Phase 8 (Results loader):** results must be harvested by
+  continuing to poll the event detail page until `matchIsComplete=true`, then storing
+  the final score. There is no historical archive endpoint to back-fill from. We
+  should also evaluate scraping a third-party results aggregator
+  (flashscore, livescore, sofascore) as a fallback — that's a Phase 8 design decision.
+
+---
+
+## 2. Anti-bot Posture
+
+| Signal | Observation |
+|---|---|
+| Cloudflare | Absent. `Server: nginx`, no `cf-*` headers. |
+| reCAPTCHA / hCAPTCHA | Not on public listing or event pages (only on `/captchaData.htm` for login). |
+| User-Agent filtering | A browser UA returns 200. We did not test with `curl/8.x` or empty UA — recommend always sending a real UA. |
+| Cookie requirement | None for read-only access. The site sets `puid`, `JSESSIONID`, `lastSitePart`, etc., but we observed full HTML on the very first request without prior cookies. |
+| IP rate-limit | 5 sequential requests at ~1s pacing all returned 200 in <1 s. No throttling observed within our budget (10 total requests). The customer should test heavier loads from their environment. |
+| Geo-block | Probe environment is geo-routed as Poland; site still serves `/su` Russian content. Customer (Belarus) should see same or better access. |
+| Fingerprinting | Standard analytics (GTM, dataLayer); no JS-fingerprint cookies or canvas hashing detected in the entry-page payload. |
+
+**Mitigations to bake into the scraper anyway** (defense-in-depth):
+
+- **Rotate User-Agents** from a small pool of recent Chrome/Firefox/Edge versions
+  (configurable via `Scraping:UserAgents[]`).
+- **Polite pacing:** default `Scraping:RateLimit:RequestsPerSecond = 1`,
+  `MaxConcurrentRequests = 4`. Per-host token-bucket rate limiter using Polly v8 +
+  `Microsoft.Extensions.Http.Resilience`.
+- **Honor `Cache-Control: no-store`** — do NOT cache responses; that's the site's intent.
+- **Handle 403 / 429 / 503** with exponential backoff and circuit breaker; alert the user
+  when circuit opens for >5 minutes.
+- **Cookie jar per scraper instance** — accept set-cookies and replay them. This avoids
+  a session-creation latency on every request.
+- **Belarus-specific:** if customer's environment ever sees a `/forbidden` redirect,
+  we fall back to the `afterForbiddenRedirectUrl` documented in `initData`.
+
+---
+
+## 3. URL Templates Phase 3 Will Use
+
+| Purpose | Template | Notes |
+|---|---|---|
+| Pre-match top page | `https://www.marathonbet.by/su/` | Mixed live + popular pre-match. Use only for landing/health-check. |
+| Live top page | `https://www.marathonbet.by/su/live` | Mixed sports. Use for live-event discovery. |
+| Live popular | `https://www.marathonbet.by/su/live/popular` | Same data as `/su/live`. |
+| All-events index | `https://www.marathonbet.by/su/all-events/` | Long full list; use for discovery seed. |
+| Sport listing (by ID) | `https://www.marathonbet.by/su/betting/{Sport}+-+{sportId}` | e.g., `/su/betting/Basketball+-+6`. **Preferred** because sport-id stable. |
+| Sport listing (by name) | `https://www.marathonbet.by/su/popular/{Sport}` | e.g., `/su/popular/Basketball`. Convenient for humans. |
+| Category / league listing | `https://www.marathonbet.by/su/betting/{Sport}/{League+Path}+-+{categoryTreeId}` | From breadcrumbs / `category-label-link`. |
+| Event detail | `https://www.marathonbet.by/su/betting/{event-path}` | `event-path` from `data-event-path`, ends in `-+{treeId}`. |
+| Live update signal | `https://www.marathonbet.by/su/liveupdate/popular/?treeIds={csv}` | Returns `{"modified":[...],"updated":<ts>}`. Use only as "hey something changed" hint; full odds still come from event-detail re-fetch. |
+| Server time sync | `https://www.marathonbet.by/su/stateless/synctime` | Use to anchor "today" date interpretation. |
+
+URL paths use `+` for spaces, `%2C` for `,`, etc. — standard `Uri.EscapeDataString`.
+
+---
+
+## 4. Sport ID Inventory (observed)
+
+From the pre-match landing page (`data-sport-treeId` attributes + `category-label`
+breadcrumb hrefs):
+
+| Sport ID | Russian name | English path |
+|---|---|---|
+| **6** | Баскетбол | `Basketball` |
+| **11** | Футбол | `Football` |
+| **537** | (TBD — verify on populated day) | — |
+| **2398** | (TBD) | — |
+| **22723** | Теннис | `Tennis` |
+| **26418** | Футбол (alt? duplicate live) | `Football` |
+| **43658** | Хоккей | `Hockey` |
+| **45356** | Баскетбол (live tree) | `Basketball` |
+| **139722** | Гандбол | `Handball` |
+| **414329** | Настольный теннис | `Table+Tennis` |
+| **1372932** | Киберспорт | `Esports` |
+| **3083982** | Лотереи | `Lotteries` |
+| **11308234** | Шорт хоккей | `Short+Hockey` |
+| **23054364** | Кибербаскетбол | `eBasketball` |
+| **23054392** | Киберфутбол | `eFootball` |
+
+**Important observation:** the site has **two parallel tree IDs per sport** — one
+"canonical" (e.g., `6` for Basketball) used on event-detail breadcrumb, and a
+"category" tree ID (e.g., `45356`) used inside the live grouping. Phase 1 domain
+needs to recognize the canonical ID as `SportCode` and ignore the category tree ID.
+
+The customer-spec field `Sport_Code = 6` for Basketball matches the canonical ID
+in `data-sport-treeId="6"` and in the breadcrumb URL `/su/betting/Basketball+-+6`.
+
+---
+
+## 5. Bet Selection Naming Convention
+
+Format: `{eventId}@{MarketName}{LineIndex?}.{Outcome}`
+
+Where:
+
+- `eventId` = bookmaker's `data-event-eventId` (numeric, ~26-million range, stable).
+- `MarketName` = `Match_Result`, `To_Win_Match_With_Handicap`, `Total_Points`,
+  `1st_Half_Result`, `To_Win_1st_Half_With_Handicap`, `1st_Set_Total_Games`, etc.
+- `LineIndex?` = optional integer suffix when a market has multiple lines/spreads
+  (e.g., `Total_Points10`, `Total_Points11` are different total thresholds for the
+  same event). Empty / `0` is the "main" line.
+- `Outcome` codes:
+  - `1`, `draw`, `3` — for 3-way result markets
+  - `HB_H`, `HB_A` — handicap home/away
+  - `Under_<X>`, `Over_<X>` — total under/over (X is the threshold, embedded in name)
+  - `HD`, `AD` — half-time/full-time draw combinations
+  - `yes` / `no` — for yes/no markets
+
+The handicap value (`+1.0`, `-2.5`) and total threshold (`213.5`) are NOT in the
+selection key as parseable numbers — they live in the `<span class="middle-simple">`
+display element OR they are embedded in the outcome name (e.g., `Under_213.5`).
+
+---
+
+## 6. Period Scope per Sport (observed)
+
+| Sport | Period scopes available | Spec field prefix |
+|---|---|---|
+| Football (11) | 1st Half, 2nd Half | `Bet_Period-1_*`, `Bet_Period-2_*` |
+| Basketball (6) | 1st/2nd Half, 1st/2nd/3rd/4th Quarter | Customer must clarify whether Period-N maps to halves or quarters. **Recommend halves** as default (Period-1, Period-2) with an `appsettings` toggle for quarter-mode. |
+| Tennis (22723) | 1st Set, 2nd Set, ... (variable count) | `Bet_Period-1_*` = 1st Set, etc. **No Draw outcome.** |
+| Hockey (43658) | 1st/2nd/3rd Period | `Bet_Period-1_*`, `Bet_Period-2_*`, `Bet_Period-3_*` (not yet sampled — revalidate in Phase 3). |
+
+The internal market-name token is sport-dependent:
+- `1st_Half_Result`, `To_Win_1st_Half_With_Handicap`
+- `1st_Quarter_Result`, `To_Win_1st_Quarter_With_Handicap`
+- `1st_Set_Result`, `To_Win_1st_Set_With_Handicap`
+
+**Phase 3 should encapsulate this** in a sport-aware mapping table
+(`PeriodScopeMapper`) keyed on `SportCode`, returning the set of expected period
+markets and their token names.
+
+---
+
+## 7. Open Questions / Risks
+
+1. **Results storage cleanup:** how long does marathonbet keep finished events on
+   the event detail URL? Must be empirically tested over Phase 8. Recommend retaining
+   our own snapshot with `matchIsComplete=true` permanently in SQLite as soon as
+   we observe it, so we never depend on the site for historical data.
+2. **Sport ID duplication** (e.g., `26418` and `11` both = Football):
+   verify with customer that we should use the canonical breadcrumb ID. The
+   "category" trees may exist for live grouping or alphabetization purposes.
+3. **Localization:** site labels are Russian on `/su/`. There appears to be `/en/`
+   path support (untested). Customer wants RU + EN — Phase 5 must verify EN locale
+   page parses identically.
+4. **Period total markets in basketball:** sampled NBA event did NOT explicitly
+   expose "Total points 1st quarter" as a clean market in the public HTML — only
+   `AllInningsGoalsOver` (combined). Customer's spec implies `Bet_Period-N_Total_*`
+   is universal — Phase 3 must gracefully degrade and emit `null` rates for fields
+   the site doesn't surface for that sport+league.
+5. **Belarus geo-restriction risk:** we tested from non-BY. If customer's BY IP
+   gets a different page (KYC overlay, deposit prompt, etc.), the parser must be
+   robust to unexpected wrapping. Defensive parsing only — never assume strict
+   structure.
+6. **`isLogged: false` overlay risk:** initData reports we are anonymous. Some
+   markets may be hidden behind login (we did not detect any in samples, but the
+   parser should treat missing markets as `null`, not throw).
+
+---
+
+## 8. Recommended Phase 3 Architecture
+
+```
+IOddsScraper (Application)
+   │
+   └── MarathonBetScraper : IOddsScraper (Infrastructure)
+        ├── HttpClient (resilient via Polly v8)
+        │     ├── User-Agent rotator
+        │     ├── Token-bucket rate limiter (config: RequestsPerSecond)
+        │     ├── Retry policy (3x exponential backoff, jitter)
+        │     └── Circuit breaker (open after N consecutive 5xx)
+        │
+        ├── EventDiscoveryParser  ← parses /su/, /su/live, /su/popular/{sport}
+        │     produces List<EventListItem>
+        │
+        ├── EventDetailParser     ← parses /su/betting/<path>
+        │     produces FullOddsSnapshot with all markets
+        │
+        ├── BreadcrumbParser      ← extracts Sport / Country / League / Stage taxonomy
+        │
+        └── BetMarketMapper       ← AngleSharp QuerySelector → spec field name
+              (sport-aware; uses PeriodScopeMapper)
+```
+
+**Use AngleSharp for parsing** — it handles malformed HTML well, has a CSS-selector
+API, and is the established `.NET` choice. JSON islands inside attributes (`data-sel`,
+`data-json`) decode cleanly with `System.Text.Json`.
+
+**No Playwright required** for the scraper. Keep Playwright as a documented
+fallback in `appsettings` (`Scraping:UsePlaywright = false`) so we can flip it on
+later if the site adds JS challenges. This adds <100 LOC of optional code, costs
+nothing if unused.
+
+---
+
+## 9. Customer Validation Plan
+
+If our environment ever stops working (geo-block, IP ban, etc.) the customer in
+Belarus can:
+
+1. Open https://www.marathonbet.by/su in a browser, verify it renders.
+2. View page source (Ctrl+U), search for `data-event-eventId` — confirm same
+   structure as our captured `spike/captures/pre-match-landing.html`.
+3. Save the HTML and email it to dev — the parser is environment-agnostic and
+   should handle their captured HTML byte-for-byte.
+
+This decouples scraper development from probe environment and makes Phase 3
+testable offline.
+
+---
+
+## 10. Captured Samples (gitignored, local only)
+
+| File | Purpose |
+|---|---|
+| `spike/captures/pre-match-landing.html` | `/su/` snapshot, 587 KB, full grid |
+| `spike/captures/live-landing.html` | `/su/live` snapshot, 250 KB |
+| `spike/captures/basketball-listing.html` | `/su/popular/Basketball`, 471 KB |
+| `spike/captures/event-basketball-28405506.html` | NBA Knicks vs 76ers full event, 505 KB |
+| `spike/captures/event-football-28089645.html` | UCL Arsenal vs Atletico full event, 1.58 MB |
+| `spike/captures/event-tennis-28430484.html` | ATP Rome qualif full event, 244 KB |
+| `spike/captures/liveupdate-popular.json` | Live-update API sample response |
+| `spike/captures/results-page.html` | `/su/results` response (~20 KB) — captured to evidence the missing public archive endpoint (Phase 8 deviation). |
+
+These artifacts are **not committed** but should be kept locally to back parser unit
+tests in Phase 3.
+
+> **Caveats on captures:**
+>
+> - `live-landing.html` was captured at a moment when no live events were
+>   in-progress for popular sports. As a result, the `.score-state` element
+>   referenced in `SCHEMA_DRAFT.md` §1 is NOT present in this particular capture.
+>   Phase 3 should re-verify the score selector against a live event during
+>   parser implementation (the selector itself is well-known across bookmaker
+>   sites and not in doubt).
+> - Hockey events were not sampled directly. Period-result selection key tokens
+>   for hockey (`1st_Period_Result0.RN_H` etc.) are extrapolated from the
+>   football/basketball/tennis pattern and marked TBD in `SCHEMA_DRAFT.md`. Phase 3
+>   must verify against a real hockey event before relying on those tokens.

src/Marathon.Application/Abstractions/IAnomalyRepository.cs

@@ -0,0 +1,26 @@
+using Marathon.Domain.Entities;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Repository for <see cref="Anomaly"/> domain entities.
+/// </summary>
+public interface IAnomalyRepository : IRepository<Guid, Anomaly>
+{
+    /// <summary>
+    /// Server-side count of anomalies detected strictly after <paramref name="since"/>.
+    /// Backs the unread badge without materialising the table.
+    /// </summary>
+    Task<int> CountSinceAsync(DateTimeOffset since, CancellationToken ct = default);
+
+    /// <summary>
+    /// Anomalies whose <see cref="Anomaly.DetectedAt"/> falls in the inclusive
+    /// [<paramref name="from"/>..<paramref name="to"/>] window (either bound may be
+    /// null for open-ended), ordered newest-first. Pushes the temporal filter to SQL;
+    /// severity / sport filtering remains a service concern (needs the event join).
+    /// </summary>
+    Task<IReadOnlyList<Anomaly>> ListByDateRangeAsync(
+        DateTimeOffset? from,
+        DateTimeOffset? to,
+        CancellationToken ct = default);
+}

src/Marathon.Application/Abstractions/IBetPlacer.cs

@@ -0,0 +1,21 @@
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Marker interface for the future bet-placing feature.
+/// </summary>
+/// <remarks>
+/// <para>
+/// This interface is intentionally empty.  It acts as an extension point for
+/// a future implementation that interacts with a bookmaker's authenticated
+/// betting API.
+/// </para>
+/// <para>
+/// Phase 3 scope is analyze-only.  Register a stub / no-op implementation if
+/// needed for DI graph completeness, but the interface itself is not consumed
+/// by any application service in the current release.
+/// </para>
+/// </remarks>
+public interface IBetPlacer
+{
+    // Future: PlaceBetAsync(BetRequest request, CancellationToken ct)
+}

src/Marathon.Application/Abstractions/IEventRepository.cs

@@ -0,0 +1,46 @@
+using Marathon.Application.Storage;
+using Marathon.Domain.Entities;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Repository for <see cref="Event"/> domain entities.
+/// </summary>
+public interface IEventRepository : IRepository<EventId, Event>
+{
+    Task<IReadOnlyList<Event>> ListByDateRangeAsync(DateRange range, CancellationToken ct = default);
+
+    /// <summary>
+    /// Date-range + sport-filtered query pushed to the database. Replaces the
+    /// "load the whole date range then filter sports in memory" path on the list
+    /// pages. Locale-sensitive search and sort remain a service-layer concern.
+    /// </summary>
+    Task<IReadOnlyList<Event>> QueryAsync(EventQuery query, CancellationToken ct = default);
+
+    /// <summary>
+    /// Batched point-lookup: loads many events in a single query, keyed by
+    /// <see cref="EventId"/>. Missing ids are simply absent from the dictionary.
+    /// Replaces per-id <see cref="IRepository{TKey,TEntity}.GetAsync"/> loops (N+1).
+    /// </summary>
+    Task<IReadOnlyDictionary<EventId, Event>> GetManyAsync(
+        IReadOnlyCollection<EventId> ids,
+        CancellationToken ct = default);
+
+    Task<IReadOnlyList<Event>> ListBySportAsync(SportCode sport, CancellationToken ct = default);
+
+    /// <summary>Server-side total event count (dashboard summary).</summary>
+    Task<int> CountAsync(CancellationToken ct = default);
+
+    /// <summary>
+    /// Distinct sport codes across the events table. Projects in the database
+    /// rather than materialising every <see cref="Event"/> on the client.
+    /// </summary>
+    Task<IReadOnlyList<int>> ListDistinctSportCodesAsync(CancellationToken ct = default);
+
+    /// <summary>
+    /// Distinct ISO-2 country codes across the events table. Projects in the
+    /// database rather than materialising every <see cref="Event"/>.
+    /// </summary>
+    Task<IReadOnlyList<string>> ListDistinctCountryCodesAsync(CancellationToken ct = default);
+}

src/Marathon.Application/Abstractions/IExcelExporter.cs

@@ -0,0 +1,22 @@
+using Marathon.Application.Storage;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Exports odds snapshots to an Excel file matching the customer's wide-column specification.
+/// </summary>
+public interface IExcelExporter
+{
+    /// <summary>
+    /// Exports snapshots for the given date range to an XLSX file.
+    /// </summary>
+    /// <param name="range">The inclusive date range to export.</param>
+    /// <param name="kind">Which snapshots to include: pre-match, live, or combined.</param>
+    /// <param name="outputPath">
+    /// Directory where the file will be written. The filename is auto-generated as
+    /// <c>Marathon_yyyy-MM-dd_to_yyyy-MM-dd.xlsx</c>.
+    /// </param>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>The full path of the created file.</returns>
+    Task<string> ExportAsync(DateRange range, ExportKind kind, string outputPath, CancellationToken ct = default);
+}

src/Marathon.Application/Abstractions/INotificationSink.cs

@@ -0,0 +1,28 @@
+using Marathon.Domain.Enums;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// A ready-to-deliver anomaly alert payload, shaped by
+/// <see cref="UseCases.GetPendingAnomalyNotificationsUseCase"/> so a sink only has to
+/// format and transmit it.
+/// </summary>
+public sealed record AnomalyNotification(
+    Guid AnomalyId,
+    string EventTitle,
+    AnomalyKind Kind,
+    decimal Score,
+    DateTimeOffset DetectedAt);
+
+/// <summary>
+/// A channel that delivers anomaly alerts (e.g. Telegram; future: email / Discord).
+/// </summary>
+/// <remarks>
+/// Implementations must be resilient: a failure to deliver one notification should be
+/// logged and swallowed, never thrown into the dispatcher loop. A sink that is not
+/// configured (e.g. missing credentials) should no-op with a warning.
+/// </remarks>
+public interface INotificationSink
+{
+    Task SendAsync(AnomalyNotification notification, CancellationToken ct);
+}

src/Marathon.Application/Abstractions/IOddsScraper.cs

@@ -0,0 +1,75 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Scrapes upcoming events, live odds snapshots, and completed event results
+/// from a bookmaker's public web interface.
+/// </summary>
+/// <remarks>
+/// The infrastructure implementation (<c>MarathonbetScraper</c>) uses
+/// HttpClient + AngleSharp + Polly.  All methods are non-blocking and
+/// honour the caller's <see cref="CancellationToken"/>.
+/// </remarks>
+public interface IOddsScraper
+{
+    /// <summary>
+    /// Returns the list of upcoming (pre-match) events, optionally filtered to one sport.
+    /// </summary>
+    /// <param name="sportFilter">When non-null, restricts results to the given sport code.</param>
+    /// <param name="ct">Cancellation token.</param>
+    Task<IReadOnlyList<Event>> ScrapeUpcomingAsync(
+        SportCode? sportFilter,
+        CancellationToken ct);
+
+    /// <summary>
+    /// Returns the list of currently-live events parsed from <c>/su/live</c>.
+    /// Each returned <see cref="Event"/> has its <see cref="Event.EventPath"/>
+    /// populated so the caller can immediately fetch its odds snapshot.
+    /// </summary>
+    /// <param name="ct">Cancellation token.</param>
+    Task<IReadOnlyList<Event>> ScrapeLiveAsync(CancellationToken ct);
+
+    /// <summary>
+    /// Fetches a full odds snapshot (all markets) for a single event.
+    /// </summary>
+    /// <param name="eventInfo">
+    /// The event to scrape — its <see cref="Event.EventPath"/> drives URL construction.
+    /// When the path is null (legacy row), the scraper falls back to the numeric event ID.
+    /// </param>
+    /// <param name="source">Whether this is a pre-match or live scrape.</param>
+    /// <param name="ct">Cancellation token.</param>
+    Task<OddsSnapshot> ScrapeEventOddsAsync(
+        Event eventInfo,
+        OddsSource source,
+        CancellationToken ct);
+
+    /// <summary>
+    /// Fetches the event-detail page for a single event and extracts its final
+    /// result if and only if the bookmaker has flagged the match as complete
+    /// (<c>eventJsonInfo.matchIsComplete = true</c>).
+    /// </summary>
+    /// <remarks>
+    /// <para>
+    /// marathonbet.by has no public results archive endpoint
+    /// (<c>/su/results</c> → 404), so results are harvested per-event by
+    /// re-fetching the same event-detail HTML used for odds scraping and
+    /// parsing the embedded <c>eventJsonInfo</c> JSON.
+    /// </para>
+    /// </remarks>
+    /// <param name="eventInfo">
+    /// The event to query — its <see cref="Event.EventPath"/> drives URL
+    /// construction (with the numeric ID as a best-effort fallback).
+    /// </param>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>
+    /// An <see cref="EventResult"/> when the match is complete and the score
+    /// could be parsed, <c>null</c> when the match is still in-progress or
+    /// the score string is unrecognised.
+    /// </returns>
+    Task<EventResult?> ScrapeEventResultAsync(
+        Event eventInfo,
+        CancellationToken ct);
+}

src/Marathon.Application/Abstractions/IPaperBetRepository.cs

@@ -0,0 +1,24 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Repository for <see cref="PaperBet"/> entities — the forward-test ledger written
+/// by the paper-trading worker.
+/// </summary>
+public interface IPaperBetRepository : IRepository<Guid, PaperBet>
+{
+    /// <summary>
+    /// Paper bets in a given settlement state — <see cref="BetOutcome.Pending"/> is
+    /// the open set the settler scans each cycle.
+    /// </summary>
+    Task<IReadOnlyList<PaperBet>> ListByOutcomeAsync(BetOutcome outcome, CancellationToken ct = default);
+
+    /// <summary>
+    /// The subset of <paramref name="anomalyIds"/> that already have a paper bet —
+    /// lets the opener skip anomalies it has already forward-tested (one bet per anomaly).
+    /// </summary>
+    Task<IReadOnlySet<Guid>> GetExistingAnomalyIdsAsync(
+        IReadOnlyCollection<Guid> anomalyIds, CancellationToken ct = default);
+}

src/Marathon.Application/Abstractions/IPlacedBetRepository.cs

@@ -0,0 +1,32 @@
+using Marathon.Application.Storage;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Repository for <see cref="PlacedBet"/> domain entities — the user-tracked
+/// betting journal.
+/// </summary>
+public interface IPlacedBetRepository : IRepository<Guid, PlacedBet>
+{
+    /// <summary>
+    /// Bets matching <paramref name="outcome"/>. Used by the resolver use case
+    /// to scan only <see cref="BetOutcome.Pending"/> rows on each pass.
+    /// </summary>
+    Task<IReadOnlyList<PlacedBet>> ListByOutcomeAsync(BetOutcome outcome, CancellationToken ct = default);
+
+    /// <summary>
+    /// Bets whose <see cref="PlacedBet.PlacedAt"/> falls within
+    /// <paramref name="range"/>. Used by the journal page when the user filters
+    /// by date.
+    /// </summary>
+    Task<IReadOnlyList<PlacedBet>> ListByDateRangeAsync(DateRange range, CancellationToken ct = default);
+
+    /// <summary>
+    /// Every bet recorded against <paramref name="eventId"/>. Used by the event
+    /// detail page to show "you have N bets on this match".
+    /// </summary>
+    Task<IReadOnlyList<PlacedBet>> ListByEventAsync(EventId eventId, CancellationToken ct = default);
+}

src/Marathon.Application/Abstractions/IRepository.cs

@@ -0,0 +1,23 @@
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Generic repository abstraction providing CRUD operations for a domain entity.
+/// </summary>
+/// <typeparam name="TKey">The type of the entity's primary key.</typeparam>
+/// <typeparam name="TEntity">The domain entity type.</typeparam>
+public interface IRepository<TKey, TEntity>
+    where TKey : notnull
+    where TEntity : class
+{
+    Task<TEntity?> GetAsync(TKey key, CancellationToken ct = default);
+
+    Task<IReadOnlyList<TEntity>> ListAsync(CancellationToken ct = default);
+
+    Task AddAsync(TEntity entity, CancellationToken ct = default);
+
+    Task UpdateAsync(TEntity entity, CancellationToken ct = default);
+
+    Task DeleteAsync(TKey key, CancellationToken ct = default);
+
+    Task SaveChangesAsync(CancellationToken ct = default);
+}

src/Marathon.Application/Abstractions/IResultRepository.cs

@@ -0,0 +1,19 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Repository for <see cref="EventResult"/> domain entities.
+/// </summary>
+public interface IResultRepository : IRepository<EventId, EventResult>
+{
+    /// <summary>
+    /// Batched point-lookup: loads many results in a single query, keyed by
+    /// <see cref="EventId"/>. Missing ids are simply absent from the dictionary.
+    /// Replaces per-id <see cref="IRepository{TKey,TEntity}.GetAsync"/> loops (N+1).
+    /// </summary>
+    Task<IReadOnlyDictionary<EventId, EventResult>> GetManyAsync(
+        IReadOnlyCollection<EventId> ids,
+        CancellationToken ct = default);
+}

src/Marathon.Application/Abstractions/ISavedStrategyRepository.cs

@@ -0,0 +1,17 @@
+using Marathon.Domain.Backtesting;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Repository for <see cref="SavedStrategy"/> presets — the user's named,
+/// reusable backtest staking configurations. <see cref="IRepository{TKey,TEntity}.ListAsync"/>
+/// returns them name-ascending for a stable picker order.
+/// </summary>
+public interface ISavedStrategyRepository : IRepository<Guid, SavedStrategy>
+{
+    /// <summary>
+    /// The preset whose (trimmed) name matches <paramref name="name"/>, or null.
+    /// Used by the save flow to upsert by name rather than create a duplicate.
+    /// </summary>
+    Task<SavedStrategy?> GetByNameAsync(string name, CancellationToken ct = default);
+}

src/Marathon.Application/Abstractions/ISnapshotRepository.cs

@@ -0,0 +1,66 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Application.Abstractions;
+
+/// <summary>
+/// Repository for <see cref="OddsSnapshot"/> domain entities.
+/// </summary>
+/// <remarks>
+/// Snapshots are append-only and identified by the composite (EventId, CapturedAt)
+/// rather than a surrogate key, so this contract intentionally does NOT extend
+/// <see cref="IRepository{TKey, TEntity}"/> — point lookup by Guid would be
+/// meaningless. Use <see cref="ListByEventAsync"/> for retrieval.
+/// </remarks>
+public interface ISnapshotRepository
+{
+    Task<IReadOnlyList<OddsSnapshot>> ListAsync(CancellationToken ct = default);
+
+    /// <summary>
+    /// Server-side count of snapshots captured at or after <paramref name="since"/>.
+    /// Backs the dashboard "snapshots today" stat without materialising rows.
+    /// </summary>
+    Task<int> CountSinceAsync(DateTimeOffset since, CancellationToken ct = default);
+
+    /// <summary>
+    /// The most recent snapshot capture time across all events, or <c>null</c> when the
+    /// store is empty. Backs the pipeline-health freshness indicator.
+    /// </summary>
+    Task<DateTimeOffset?> GetLatestCapturedAtAsync(CancellationToken ct = default);
+
+    Task<IReadOnlyList<OddsSnapshot>> ListByEventAsync(
+        EventId eventId,
+        DateTimeOffset from,
+        DateTimeOffset to,
+        CancellationToken ct = default);
+
+    /// <summary>
+    /// Batched companion to <see cref="ListByEventAsync"/>: loads snapshots
+    /// for many events in a single query and groups by <see cref="EventId"/>.
+    /// Events with no snapshots in range get an empty list in the result.
+    /// </summary>
+    Task<IReadOnlyDictionary<EventId, IReadOnlyList<OddsSnapshot>>> ListByEventsAsync(
+        IReadOnlyCollection<EventId> eventIds,
+        DateTimeOffset from,
+        DateTimeOffset to,
+        CancellationToken ct = default);
+
+    Task AddAsync(OddsSnapshot entity, CancellationToken ct = default);
+
+    Task SaveChangesAsync(CancellationToken ct = default);
+
+    /// <summary>
+    /// Returns the latest pre-match snapshot for <paramref name="eventId"/> whose
+    /// <see cref="OddsSnapshot.CapturedAt"/> is at or before
+    /// <paramref name="atOrBefore"/>, or <c>null</c> if none exists. Used by the
+    /// bet-journal use case as the "closing line" reference for CLV.
+    /// </summary>
+    /// <remarks>
+    /// Pushes the ORDER BY + LIMIT 1 down to SQLite so we do not materialise
+    /// every snapshot in the 30-day pre-match window just to pick one.
+    /// </remarks>
+    Task<OddsSnapshot?> GetLatestPreMatchAsync(
+        EventId eventId,
+        DateTimeOffset atOrBefore,
+        CancellationToken ct = default);
+}

src/Marathon.Application/ApplicationModule.cs

@@ -0,0 +1,53 @@
+using Marathon.Application.UseCases;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Marathon.Application;
+
+/// <summary>
+/// DI registration helpers for the Marathon.Application layer.
+/// Call <see cref="AddMarathonApplication"/> from the composition root (host or
+/// <c>InfrastructureModule</c>).
+/// </summary>
+public static class ApplicationModule
+{
+    /// <summary>
+    /// Registers all Application-layer use cases with <c>Scoped</c> lifetime.
+    /// Use cases are scoped so that each background-service cycle or UI request
+    /// gets a fresh unit-of-work from its own DI scope.
+    /// </summary>
+    /// <remarks>
+    /// No <see cref="Microsoft.Extensions.Configuration.IConfiguration"/> is
+    /// required here — the Application layer has no direct configuration bindings.
+    /// Infrastructure and UI layers bind their own options against the shared
+    /// JSON sections.
+    /// </remarks>
+    public static IServiceCollection AddMarathonApplication(this IServiceCollection services)
+    {
+        ArgumentNullException.ThrowIfNull(services);
+
+        services.AddScoped<PullUpcomingEventsUseCase>();
+        services.AddScoped<PullLiveOddsUseCase>();
+        services.AddScoped<PullResultsUseCase>();
+        services.AddScoped<ExportToExcelUseCase>();
+        services.AddScoped<ExportToCsvUseCase>();
+        services.AddScoped<DetectAnomaliesUseCase>();
+        services.AddScoped<EvaluateAnomalyOutcomesUseCase>();
+        services.AddScoped<GetPendingAnomalyNotificationsUseCase>();
+
+        services.AddScoped<RecordPlacedBetUseCase>();
+        services.AddScoped<ResolvePendingBetsUseCase>();
+        services.AddScoped<BuildBetJournalReportUseCase>();
+        services.AddScoped<DeletePlacedBetUseCase>();
+        services.AddScoped<UpdatePlacedBetUseCase>();
+
+        services.AddScoped<RunBacktestUseCase>();
+        services.AddScoped<SaveStrategyUseCase>();
+        services.AddScoped<DeleteStrategyUseCase>();
+        services.AddScoped<CompareStrategiesUseCase>();
+
+        services.AddScoped<OpenPaperBetsUseCase>();
+        services.AddScoped<SettlePaperBetsUseCase>();
+
+        return services;
+    }
+}

src/Marathon.Application/Betting/BetJournalReport.cs

@@ -0,0 +1,92 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+
+namespace Marathon.Application.Betting;
+
+/// <summary>
+/// Aggregate report on the user's bet-tracking journal — totals, P&amp;L, and
+/// per-bet CLV. Consumed by the Journal page; built by
+/// <see cref="UseCases.BuildBetJournalReportUseCase"/>.
+/// </summary>
+/// <param name="Stats">Roll-up of stake / profit / hit rate / CLV across all bets in scope.</param>
+/// <param name="Bets">
+/// Every bet paired with its computed CLV (null when no closing snapshot was
+/// available). Ordered most-recent <see cref="PlacedBet.PlacedAt"/> first.
+/// </param>
+public sealed record BetJournalReport(
+    BetJournalStats Stats,
+    IReadOnlyList<BetJournalRow> Bets);
+
+/// <summary>
+/// One row in the journal — a domain <see cref="PlacedBet"/> plus the CLV
+/// computed against the closing pre-match snapshot.
+/// </summary>
+/// <param name="Bet">The domain bet exactly as persisted.</param>
+/// <param name="ClvProbabilityDelta">
+/// Closing-line value as an implied-probability delta in roughly [-1, 1].
+/// Positive means the user took a better price than the closing line; null
+/// when no matching bet existed in the closing snapshot.
+/// </param>
+public sealed record BetJournalRow(
+    PlacedBet Bet,
+    decimal? ClvProbabilityDelta);
+
+/// <summary>
+/// Aggregate statistics across a set of <see cref="PlacedBet"/>.
+/// All money values share the user's currency — the domain does not encode one.
+/// </summary>
+/// <param name="TotalBets">Every bet in scope, regardless of outcome.</param>
+/// <param name="PendingCount">Bets still awaiting settlement.</param>
+/// <param name="WonCount">Settled wins.</param>
+/// <param name="LostCount">Settled losses.</param>
+/// <param name="VoidCount">Settled pushes / void grades.</param>
+/// <param name="TotalStaked">
+/// Turnover that contributes to ROI: sum of <see cref="PlacedBet.Stake"/> across
+/// <b>Won and Lost</b> bets only. Void (push) and Pending bets are excluded — a
+/// returned stake is not real turnover and counting it would dilute ROI.
+/// </param>
+/// <param name="TotalReturned">
+/// Sum of <see cref="PlacedBet.GrossReturn"/> across the same Won + Lost subset
+/// that feeds <see cref="TotalStaked"/>.
+/// </param>
+/// <param name="NetProfit"><c>TotalReturned − TotalStaked</c>.</param>
+/// <param name="RoiPercent">
+/// <c>NetProfit / TotalStaked × 100</c>. Null when no bets have resolved yet.
+/// </param>
+/// <param name="StrikeRatePercent">
+/// <c>WonCount / (WonCount + LostCount) × 100</c> — excludes voids and pendings.
+/// Null when no settled win/loss exists yet.
+/// </param>
+/// <param name="AverageClvProbabilityDelta">
+/// Mean CLV across bets where CLV was computable. Null when no comparable
+/// closing snapshot was available for any bet.
+/// </param>
+public sealed record BetJournalStats(
+    int TotalBets,
+    int PendingCount,
+    int WonCount,
+    int LostCount,
+    int VoidCount,
+    decimal TotalStaked,
+    decimal TotalReturned,
+    decimal NetProfit,
+    decimal? RoiPercent,
+    decimal? StrikeRatePercent,
+    decimal? AverageClvProbabilityDelta)
+{
+    /// <summary>Convenience: WonCount + LostCount + VoidCount.</summary>
+    public int ResolvedCount => WonCount + LostCount + VoidCount;
+
+    public static BetJournalStats Empty { get; } = new(
+        TotalBets: 0,
+        PendingCount: 0,
+        WonCount: 0,
+        LostCount: 0,
+        VoidCount: 0,
+        TotalStaked: 0m,
+        TotalReturned: 0m,
+        NetProfit: 0m,
+        RoiPercent: null,
+        StrikeRatePercent: null,
+        AverageClvProbabilityDelta: null);
+}

src/Marathon.Application/Betting/ClosingLineValueCalculator.cs

@@ -0,0 +1,85 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Application.Betting;
+
+/// <summary>
+/// Pure helper that computes Closing Line Value (CLV) for a placed bet.
+/// </summary>
+/// <remarks>
+/// <para>
+/// CLV measures how much better (or worse) the rate the user took was compared
+/// with the bookmaker's last pre-match price on the same selection. It is the
+/// single best long-run indicator of betting skill — positive CLV correlates
+/// with positive expected value regardless of any individual bet's outcome.
+/// </para>
+/// <para>
+/// Formula (implied-probability delta):
+/// <list type="bullet">
+///   <item>Taken implied probability:   <c>p_t = 1 / takenRate</c></item>
+///   <item>Closing implied probability: <c>p_c = 1 / closeRate</c></item>
+///   <item><c>CLV  =  p_c − p_t</c></item>
+/// </list>
+/// Positive CLV means the closing price implied higher probability for the
+/// selection than the price the user took — i.e. the line moved in the user's
+/// favour after they placed the bet.
+/// </para>
+/// <para>
+/// Returns <c>null</c> when no matching bet (same Scope / Type / Side / Value)
+/// can be found in the closing snapshot — typically because the market closed
+/// before the bookmaker exposed a comparable line, or the snapshot store has
+/// gaps. UI consumers must distinguish "no data" from "0% CLV".
+/// </para>
+/// </remarks>
+public static class ClosingLineValueCalculator
+{
+    /// <summary>
+    /// Computes CLV (implied-probability delta) given the rate the user took
+    /// and the rate present in the closing pre-match snapshot for the same
+    /// selection. Both must be positive — invariants on <see cref="OddsRate"/>
+    /// already guarantee this for inputs sourced from the domain.
+    /// </summary>
+    public static decimal Compute(decimal takenRate, decimal closingRate)
+    {
+        if (takenRate <= 0m)
+            throw new ArgumentOutOfRangeException(nameof(takenRate), takenRate, "Must be positive.");
+        if (closingRate <= 0m)
+            throw new ArgumentOutOfRangeException(nameof(closingRate), closingRate, "Must be positive.");
+
+        var takenProb = 1m / takenRate;
+        var closingProb = 1m / closingRate;
+
+        // Round to 6 decimals — beyond that is noise from the round-trip.
+        return Math.Round(closingProb - takenProb, 6);
+    }
+
+    /// <summary>
+    /// Convenience overload: finds the matching <see cref="Bet"/> in
+    /// <paramref name="closingSnapshot"/> by Scope / Type / Side / Value, then
+    /// computes CLV against <paramref name="takenRate"/>. Returns <c>null</c>
+    /// when no comparable bet is present.
+    /// </summary>
+    public static decimal? TryCompute(
+        decimal takenRate,
+        Bet placedSelection,
+        OddsSnapshot? closingSnapshot)
+    {
+        ArgumentNullException.ThrowIfNull(placedSelection);
+        if (closingSnapshot is null) return null;
+
+        var match = closingSnapshot.Bets.FirstOrDefault(b =>
+            b.Scope.Equals(placedSelection.Scope) &&
+            b.Type == placedSelection.Type &&
+            b.Side == placedSelection.Side &&
+            NullableValuesEqual(b.Value, placedSelection.Value));
+
+        return match is null ? null : Compute(takenRate, match.Rate.Value);
+    }
+
+    private static bool NullableValuesEqual(OddsValue? a, OddsValue? b)
+    {
+        if (a is null && b is null) return true;
+        if (a is null || b is null) return false;
+        return a.Value == b.Value;
+    }
+}

src/Marathon.Application/Configuration/AnomalyOptions.cs

@@ -0,0 +1,66 @@
+namespace Marathon.Application.Configuration;
+
+/// <summary>
+/// Strongly typed options for the anomaly-detection subsystem.
+/// Bound from the <c>Anomaly</c> section of <c>appsettings.json</c>.
+/// </summary>
+public sealed class AnomalyOptions
+{
+    /// <summary>Configuration section key.</summary>
+    public const string SectionName = "Anomaly";
+
+    /// <summary>
+    /// Minimum gap between adjacent live snapshots, in seconds, to classify as
+    /// a bookmaker suspension. Default: 60 s.
+    /// </summary>
+    public int SuspensionGapSeconds { get; init; } = 60;
+
+    /// <summary>
+    /// Minimum normalised implied-probability delta required for the post-suspension
+    /// odds change to qualify as a flip. Must be in (0, 1). Default: 0.30.
+    /// </summary>
+    public decimal OddsFlipThreshold { get; init; } = 0.30m;
+
+    /// <summary>
+    /// Minimum number of live snapshots an event must have before detection runs.
+    /// Default: 3. Must be at least 2 (one pair).
+    /// </summary>
+    public int MinSnapshotCount { get; init; } = 3;
+
+    /// <summary>
+    /// How long the <c>AnomalyDetectionPoller</c> sleeps between detection cycles,
+    /// in seconds. Default: 60 s.
+    /// </summary>
+    public int DetectionIntervalSeconds { get; init; } = 60;
+
+    /// <summary>
+    /// Trailing window, in seconds, over which the steam-move detector measures a
+    /// continuous one-directional probability drift. Default: 120 s.
+    /// </summary>
+    public int SteamMoveWindowSeconds { get; init; } = 120;
+
+    /// <summary>
+    /// Minimum one-directional normalised implied-probability rise within the window
+    /// to flag a steam move. Must be in (0, 1). Default: 0.20 (20 percentage points).
+    /// </summary>
+    public decimal SteamMoveDriftThreshold { get; init; } = 0.20m;
+
+    /// <summary>
+    /// Maximum normalised implied-probability change across a suspension for it to count
+    /// as a "freeze" (line resumed essentially unchanged). Must be in (0, 1).
+    /// Default: 0.05 (5 percentage points).
+    /// </summary>
+    public decimal SuspensionFreezeThreshold { get; init; } = 0.05m;
+
+    /// <summary>
+    /// Trailing window, in seconds, over which the overround-compression detector
+    /// measures a continuous margin drop. Default: 120 s.
+    /// </summary>
+    public int OverroundWindowSeconds { get; init; } = 120;
+
+    /// <summary>
+    /// Minimum drop in the bookmaker's overround (raw implied-probability sum) within the
+    /// window to flag a compression. Must be in (0, 1). Default: 0.02 (2 margin points).
+    /// </summary>
+    public decimal OverroundCompressionThreshold { get; init; } = 0.02m;
+}

src/Marathon.Application/Configuration/ScrapingThrottle.cs

@@ -0,0 +1,26 @@
+namespace Marathon.Application.Configuration;
+
+/// <summary>
+/// Application-layer view of the scraping concurrency knobs.
+/// </summary>
+/// <remarks>
+/// <para>
+/// Bound from the same <c>Scraping</c> appsettings section as
+/// <c>Marathon.Infrastructure.Configuration.ScrapingOptions</c> — but only the
+/// fields the use cases need to schedule fan-out. Keeping a separate Application
+/// type avoids leaking the Infrastructure namespace into use-case code.
+/// </para>
+/// </remarks>
+public sealed class ScrapingThrottle
+{
+    public const string SectionName = "Scraping";
+
+    /// <summary>
+    /// Maximum number of in-flight HTTP requests the scraper is allowed to
+    /// issue concurrently. Use cases use this as the
+    /// <see cref="ParallelOptions.MaxDegreeOfParallelism"/> for batch fan-out.
+    /// The bookmaker rate limiter still throttles to <c>RequestsPerSecond</c>
+    /// underneath this value.
+    /// </summary>
+    public int MaxConcurrentRequests { get; init; } = 4;
+}

src/Marathon.Application/Export/Csv.cs

@@ -0,0 +1,62 @@
+using System.Text;
+
+namespace Marathon.Application.Export;
+
+/// <summary>
+/// Minimal RFC 4180 CSV writer — escapes fields and joins rows with CRLF. Pure and
+/// allocation-light; used by <see cref="UseCases.ExportToCsvUseCase"/>.
+/// </summary>
+public static class Csv
+{
+    private static readonly char[] MustQuote = { ',', '"', '\r', '\n' };
+
+    /// <summary>Builds a CSV document from a header row plus data rows (CRLF endings).</summary>
+    public static string Document(IReadOnlyList<string> header, IEnumerable<IReadOnlyList<string>> rows)
+    {
+        ArgumentNullException.ThrowIfNull(header);
+        ArgumentNullException.ThrowIfNull(rows);
+
+        var sb = new StringBuilder();
+        AppendLine(sb, header);
+        foreach (var row in rows)
+            AppendLine(sb, row);
+        return sb.ToString();
+    }
+
+    private static void AppendLine(StringBuilder sb, IReadOnlyList<string> fields)
+    {
+        for (var i = 0; i < fields.Count; i++)
+        {
+            if (i > 0) sb.Append(',');
+            sb.Append(Escape(fields[i]));
+        }
+        sb.Append("\r\n");
+    }
+
+    /// <summary>
+    /// Quotes a field when it contains a comma, double-quote, CR or LF; inner quotes are
+    /// doubled. Null is treated as empty.
+    /// </summary>
+    public static string Escape(string? field)
+    {
+        var value = field ?? string.Empty;
+        if (value.IndexOfAny(MustQuote) < 0)
+            return value;
+        return "\"" + value.Replace("\"", "\"\"") + "\"";
+    }
+
+    /// <summary>
+    /// Defuses spreadsheet formula / DDE injection: when a cell would start with a formula
+    /// trigger (<c>= + - @</c>, tab or CR) it is prefixed with an apostrophe so Excel /
+    /// LibreOffice render it as text. Apply to USER-supplied or SCRAPED text fields (notes,
+    /// event titles) before they enter a row — numeric/date cells your own code formats are
+    /// trusted and don't need it (keeping them numeric for analysis).
+    /// </summary>
+    public static string NeutralizeFormula(string? field)
+    {
+        var value = field ?? string.Empty;
+        return value.Length > 0 && value[0] is '=' or '+' or '-' or '@' or '\t' or '\r'
+            ? "'" + value
+            : value;
+    }
+}

src/Marathon.Application/GlobalUsings.cs

@@ -0,0 +1,3 @@
+// Alias Microsoft.Extensions.Logging.EventId to avoid name conflict with
+// Marathon.Domain.ValueObjects.EventId throughout the Application layer.
+global using LogEventId = Microsoft.Extensions.Logging.EventId;

src/Marathon.Application/Marathon.Application.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
+    <PackageReference Include="Microsoft.Extensions.Options" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Marathon.Domain\Marathon.Domain.csproj" />
+  </ItemGroup>
+
+</Project>

src/Marathon.Application/Reporting/AnomalyOutcomeReport.cs

@@ -0,0 +1,65 @@
+using Marathon.Domain.AnomalyDetection;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.Reporting;
+
+/// <summary>
+/// Aggregate report answering the question "is the SuspensionFlip detector right?".
+/// </summary>
+/// <param name="TotalAnomalies">Every persisted anomaly considered by this report.</param>
+/// <param name="ResolvedCount">Anomalies whose source events now have a final result.</param>
+/// <param name="UnresolvedCount">Anomalies still waiting for an event result.</param>
+/// <param name="HitCount">Resolved anomalies where the post-flip favourite won.</param>
+/// <param name="MissCount">Resolved anomalies where the post-flip favourite lost.</param>
+/// <param name="HitRate">
+/// <see cref="HitCount"/> ÷ <see cref="ResolvedCount"/> in [0, 1]. Null when no anomalies
+/// have been resolved yet — the UI must distinguish "0% hit rate" from "no data".
+/// </param>
+/// <param name="BySeverity">Breakdown by Low / Medium / High severity buckets.</param>
+/// <param name="BySport">Breakdown by sport code.</param>
+/// <param name="ByScoreBin">Breakdown across [0.30, 0.40), [0.40, 0.50), …, [0.90, 1.00].</param>
+/// <param name="ByKind">
+/// Breakdown by detector kind. Only directional kinds (SuspensionFlip, SteamMove) ever
+/// resolve to a hit/miss, so non-directional kinds simply don't appear here.
+/// </param>
+/// <param name="Resolved">All resolved anomalies, newest first. Drives the drill-down table.</param>
+/// <param name="Unresolved">All unresolved anomalies, newest first.</param>
+/// <param name="EventTitles">
+/// Pre-shaped <c>"Side1Name vs Side2Name"</c> strings keyed by event id. Carried
+/// alongside the report so UI projections do not need a second pass over
+/// <c>IEventRepository</c> — every event in <see cref="Resolved"/> /
+/// <see cref="Unresolved"/> appears as a key. Missing events (e.g. pruned) are
+/// absent; consumers fall back to <c>EventId.Value</c>.
+/// </param>
+public sealed record AnomalyOutcomeReport(
+    int TotalAnomalies,
+    int ResolvedCount,
+    int UnresolvedCount,
+    int HitCount,
+    int MissCount,
+    decimal? HitRate,
+    IReadOnlyList<OutcomeBucket> BySeverity,
+    IReadOnlyList<OutcomeBucket> BySport,
+    IReadOnlyList<OutcomeBucket> ByScoreBin,
+    IReadOnlyList<OutcomeBucket> ByKind,
+    IReadOnlyList<ResolvedAnomaly> Resolved,
+    IReadOnlyList<ResolvedAnomaly> Unresolved,
+    IReadOnlyDictionary<DomainEventId, string> EventTitles);
+
+/// <summary>
+/// One row in a breakdown table — e.g. "High severity", "Tennis", "[0.60, 0.70)".
+/// </summary>
+/// <param name="Key">
+/// Stable, culture-invariant identifier used by the UI to localise the label
+/// (e.g. <c>"Severity.High"</c>, <c>"Sport.22723"</c>, <c>"Bin.0.60-0.70"</c>).
+/// </param>
+/// <param name="Total">Resolved anomalies in this bucket.</param>
+/// <param name="Hits">Subset of <see cref="Total"/> where post-flip favourite won.</param>
+/// <param name="HitRate">
+/// <see cref="Hits"/> ÷ <see cref="Total"/>, or null when <see cref="Total"/> is 0.
+/// </param>
+public sealed record OutcomeBucket(
+    string Key,
+    int Total,
+    int Hits,
+    decimal? HitRate);

src/Marathon.Application/Reporting/OutcomeBucketKeys.cs

@@ -0,0 +1,26 @@
+namespace Marathon.Application.Reporting;
+
+/// <summary>
+/// Canonical, culture-invariant <see cref="OutcomeBucket.Key"/> prefixes and
+/// literals. Used by the use case to emit keys and by the UI to localise them
+/// — both sides reference these constants so a rename can never produce silent
+/// "key not found" rendering on the page.
+/// </summary>
+public static class OutcomeBucketKeys
+{
+    /// <summary>Prefix for sport-grouped buckets, e.g. <c>Sport.6</c>.</summary>
+    public const string SportPrefix = "Sport.";
+
+    /// <summary>Prefix for score-bin buckets, e.g. <c>Bin.0.30-0.40</c>.</summary>
+    public const string BinPrefix = "Bin.";
+
+    /// <summary>Prefix for detector-kind buckets, e.g. <c>Kind.SteamMove</c> (the enum name).</summary>
+    public const string KindPrefix = "Kind.";
+
+    /// <summary>Prefix for severity buckets, e.g. <c>Severity.High</c>.</summary>
+    public const string SeverityPrefix = "Severity.";
+
+    public const string SeverityLow = SeverityPrefix + "Low";
+    public const string SeverityMedium = SeverityPrefix + "Medium";
+    public const string SeverityHigh = SeverityPrefix + "High";
+}

src/Marathon.Application/Storage/DateRange.cs

@@ -0,0 +1,21 @@
+namespace Marathon.Application.Storage;
+
+/// <summary>
+/// An inclusive date-time range used for querying and exporting snapshots.
+/// </summary>
+public sealed record DateRange
+{
+    public DateTimeOffset From { get; }
+    public DateTimeOffset To { get; }
+
+    public DateRange(DateTimeOffset from, DateTimeOffset to)
+    {
+        if (from > to)
+            throw new ArgumentException(
+                $"DateRange.From ({from:O}) must be less than or equal to DateRange.To ({to:O}).",
+                nameof(from));
+
+        From = from;
+        To = to;
+    }
+}

src/Marathon.Application/Storage/EventQuery.cs

@@ -0,0 +1,13 @@
+namespace Marathon.Application.Storage;
+
+/// <summary>
+/// Database-pushdown query for the event list pages: an inclusive date range plus
+/// an optional sport-code filter. Locale-sensitive search and sort are deliberately
+/// NOT part of this contract — they stay in the service layer where Cyrillic
+/// ordinal semantics are preserved (SQLite BINARY collation would change them).
+/// </summary>
+/// <param name="Dates">Inclusive scheduled-at window.</param>
+/// <param name="SportCodes">When non-empty, restricts to these sport codes. Null/empty = all sports.</param>
+public sealed record EventQuery(
+    DateRange Dates,
+    IReadOnlyCollection<int>? SportCodes = null);

src/Marathon.Application/Storage/ExportKind.cs

@@ -0,0 +1,16 @@
+namespace Marathon.Application.Storage;
+
+/// <summary>
+/// Controls which odds snapshots are included in an Excel export.
+/// </summary>
+public enum ExportKind
+{
+    /// <summary>Include only pre-match snapshots (columns prefixed with <c>Bet_</c>).</summary>
+    PreMatch,
+
+    /// <summary>Include only live snapshots (columns prefixed with <c>Live_</c>).</summary>
+    Live,
+
+    /// <summary>Include both pre-match and live snapshots on separate sheets.</summary>
+    Combined,
+}

src/Marathon.Application/Storage/StorageOptions.cs

@@ -0,0 +1,18 @@
+namespace Marathon.Application.Storage;
+
+/// <summary>
+/// Configuration options for the storage layer, bound to the <c>Storage:*</c> configuration section.
+/// </summary>
+public sealed class StorageOptions
+{
+    public const string SectionName = "Storage";
+
+    /// <summary>Path to the SQLite database file. Default: <c>./data/marathon.db</c>.</summary>
+    public string DatabasePath { get; set; } = "./data/marathon.db";
+
+    /// <summary>Directory where Excel exports are written. Default: <c>./exports</c>.</summary>
+    public string ExportDirectory { get; set; } = "./exports";
+
+    /// <summary>Number of days to retain odds snapshots before pruning. Default: 90.</summary>
+    public int SnapshotRetentionDays { get; set; } = 90;
+}

src/Marathon.Application/UseCases/BuildBetJournalReportUseCase.cs

@@ -0,0 +1,173 @@
+using Marathon.Application.Abstractions;
+using Marathon.Application.Betting;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Microsoft.Extensions.Logging;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Builds a <see cref="BetJournalReport"/>: every persisted bet paired with its
+/// Closing-Line-Value, plus aggregate <see cref="BetJournalStats"/>.
+/// </summary>
+/// <remarks>
+/// <para>
+/// Closing-line lookup: for each distinct event in the journal, this use case
+/// queries pre-match snapshots within a window that ends at the event's
+/// <see cref="Event.ScheduledAt"/> and picks the latest snapshot whose
+/// <see cref="OddsSnapshot.CapturedAt"/> is still before kickoff. That snapshot
+/// is the "close" for CLV purposes.
+/// </para>
+/// <para>
+/// If the snapshot store has nothing within the lookback window, the bet
+/// receives a null CLV. Stats then exclude it from the average.
+/// </para>
+/// </remarks>
+public sealed class BuildBetJournalReportUseCase
+{
+    private readonly IPlacedBetRepository _bets;
+    private readonly IEventRepository _events;
+    private readonly ISnapshotRepository _snapshots;
+    private readonly ILogger<BuildBetJournalReportUseCase> _logger;
+
+    public BuildBetJournalReportUseCase(
+        IPlacedBetRepository bets,
+        IEventRepository events,
+        ISnapshotRepository snapshots,
+        ILogger<BuildBetJournalReportUseCase> logger)
+    {
+        _bets = bets ?? throw new ArgumentNullException(nameof(bets));
+        _events = events ?? throw new ArgumentNullException(nameof(events));
+        _snapshots = snapshots ?? throw new ArgumentNullException(nameof(snapshots));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public async Task<BetJournalReport> ExecuteAsync(CancellationToken ct = default)
+    {
+        var bets = await _bets.ListAsync(ct).ConfigureAwait(false);
+        if (bets.Count == 0)
+        {
+            _logger.LogInformation("BuildBetJournalReportUseCase: no bets — empty report");
+            return new BetJournalReport(BetJournalStats.Empty, Array.Empty<BetJournalRow>());
+        }
+
+        var distinctEventIds = bets.Select(b => b.EventId).Distinct().ToList();
+
+        // Batch the event loads (was N+1). The closing-snapshot lookup stays per-event
+        // because it pushes ORDER BY / LIMIT 1 down to SQLite (one indexed row each)
+        // and is parameterised by that event's ScheduledAt.
+        var events = await _events.GetManyAsync(distinctEventIds, ct).ConfigureAwait(false);
+
+        var closingByEvent = new Dictionary<DomainEventId, OddsSnapshot?>(distinctEventIds.Count);
+        foreach (var eventId in distinctEventIds)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            if (!events.TryGetValue(eventId, out var ev))
+            {
+                closingByEvent[eventId] = null;
+                continue;
+            }
+
+            var closing = await _snapshots
+                .GetLatestPreMatchAsync(eventId, ev.ScheduledAt, ct)
+                .ConfigureAwait(false);
+
+            closingByEvent[eventId] = closing;
+        }
+
+        var rows = new List<BetJournalRow>(bets.Count);
+        foreach (var bet in bets)
+        {
+            ct.ThrowIfCancellationRequested();
+            closingByEvent.TryGetValue(bet.EventId, out var closing);
+
+            var clv = ClosingLineValueCalculator.TryCompute(
+                takenRate: bet.Selection.Rate.Value,
+                placedSelection: bet.Selection,
+                closingSnapshot: closing);
+
+            rows.Add(new BetJournalRow(bet, clv));
+        }
+
+        rows.Sort((a, b) => b.Bet.PlacedAt.CompareTo(a.Bet.PlacedAt));
+
+        var stats = ComputeStats(rows);
+
+        _logger.LogInformation(
+            "BuildBetJournalReportUseCase: report built — {Total} bets, {Resolved} resolved, ROI={Roi:0.##}%",
+            stats.TotalBets, stats.ResolvedCount, stats.RoiPercent ?? 0m);
+
+        return new BetJournalReport(stats, rows);
+    }
+
+    private static BetJournalStats ComputeStats(IReadOnlyList<BetJournalRow> rows)
+    {
+        if (rows.Count == 0) return BetJournalStats.Empty;
+
+        var pending = 0;
+        var won = 0;
+        var lost = 0;
+        var voided = 0;
+        // Industry-standard ROI excludes pushes from turnover — staking on a Void
+        // bet returns the stake and is functionally a no-op, so counting it as
+        // turnover dilutes the ROI denominator and understates the user's edge.
+        // Only Won + Lost contribute to TotalStaked / TotalReturned.
+        var totalStaked = 0m;
+        var totalReturned = 0m;
+        decimal clvSum = 0m;
+        var clvCount = 0;
+
+        foreach (var row in rows)
+        {
+            switch (row.Bet.Outcome)
+            {
+                case BetOutcome.Pending: pending++; break;
+                case BetOutcome.Won: won++; break;
+                case BetOutcome.Lost: lost++; break;
+                case BetOutcome.Void: voided++; break;
+            }
+
+            if (row.Bet.Outcome is BetOutcome.Won or BetOutcome.Lost)
+            {
+                totalStaked += row.Bet.Stake;
+                totalReturned += row.Bet.GrossReturn ?? 0m;
+            }
+
+            if (row.ClvProbabilityDelta is { } clv)
+            {
+                clvSum += clv;
+                clvCount++;
+            }
+        }
+
+        var netProfit = totalReturned - totalStaked;
+        var winLoss = won + lost;
+
+        decimal? roi = totalStaked > 0m
+            ? Math.Round((netProfit / totalStaked) * 100m, 2)
+            : null;
+        decimal? strikeRate = winLoss > 0
+            ? Math.Round(((decimal)won / winLoss) * 100m, 2)
+            : null;
+        // CLV inputs are already 6-decimal-rounded by ClosingLineValueCalculator;
+        // round the mean only at the display boundary to avoid compounding bias.
+        decimal? avgClv = clvCount > 0
+            ? clvSum / clvCount
+            : null;
+
+        return new BetJournalStats(
+            TotalBets: rows.Count,
+            PendingCount: pending,
+            WonCount: won,
+            LostCount: lost,
+            VoidCount: voided,
+            TotalStaked: totalStaked,
+            TotalReturned: totalReturned,
+            NetProfit: netProfit,
+            RoiPercent: roi,
+            StrikeRatePercent: strikeRate,
+            AverageClvProbabilityDelta: avgClv);
+    }
+}

src/Marathon.Application/UseCases/CompareStrategiesUseCase.cs

@@ -0,0 +1,60 @@
+using Marathon.Application.Abstractions;
+using Marathon.Application.Storage;
+using Marathon.Domain.Backtesting;
+using Microsoft.Extensions.Logging;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>One saved strategy preset paired with its backtest result over a shared window.</summary>
+public sealed record StrategyComparison(Guid StrategyId, string Name, BacktestResult Result);
+
+/// <summary>
+/// Runs every saved strategy preset over the same anomaly window and returns their
+/// backtest results side by side, so the user can see which staking configuration wins.
+/// </summary>
+/// <remarks>
+/// Delegates to <see cref="RunBacktestUseCase"/> once per preset — the anomaly set is
+/// re-loaded per run, which is fine for the handful of presets a user keeps. Keeping the
+/// composition at the use-case level (rather than re-implementing candidate loading) means
+/// the comparison stays bug-for-bug identical to a single backtest run.
+/// </remarks>
+public sealed class CompareStrategiesUseCase
+{
+    private readonly ISavedStrategyRepository _strategies;
+    private readonly RunBacktestUseCase _backtest;
+    private readonly ILogger<CompareStrategiesUseCase> _logger;
+
+    public CompareStrategiesUseCase(
+        ISavedStrategyRepository strategies,
+        RunBacktestUseCase backtest,
+        ILogger<CompareStrategiesUseCase> logger)
+    {
+        _strategies = strategies ?? throw new ArgumentNullException(nameof(strategies));
+        _backtest = backtest ?? throw new ArgumentNullException(nameof(backtest));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Backtests each saved preset over <paramref name="dateRange"/> (null = all graded
+    /// anomalies). Returns one row per preset in saved (name-ascending) order; empty when
+    /// the user has saved no strategies.
+    /// </summary>
+    public async Task<IReadOnlyList<StrategyComparison>> ExecuteAsync(
+        DateRange? dateRange, CancellationToken ct = default)
+    {
+        var presets = await _strategies.ListAsync(ct).ConfigureAwait(false);
+        if (presets.Count == 0)
+            return Array.Empty<StrategyComparison>();
+
+        var rows = new List<StrategyComparison>(presets.Count);
+        foreach (var preset in presets)
+        {
+            ct.ThrowIfCancellationRequested();
+            var result = await _backtest.ExecuteAsync(preset.Strategy, dateRange, ct).ConfigureAwait(false);
+            rows.Add(new StrategyComparison(preset.Id, preset.Name, result));
+        }
+
+        _logger.LogInformation("CompareStrategiesUseCase: compared {Count} preset(s)", rows.Count);
+        return rows;
+    }
+}

src/Marathon.Application/UseCases/DeletePlacedBetUseCase.cs

@@ -0,0 +1,29 @@
+using Marathon.Application.Abstractions;
+using Microsoft.Extensions.Logging;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Removes a <see cref="Marathon.Domain.Entities.PlacedBet"/> from the journal
+/// by its identifier. Silent no-op when the id does not exist.
+/// </summary>
+public sealed class DeletePlacedBetUseCase
+{
+    private readonly IPlacedBetRepository _bets;
+    private readonly ILogger<DeletePlacedBetUseCase> _logger;
+
+    public DeletePlacedBetUseCase(
+        IPlacedBetRepository bets,
+        ILogger<DeletePlacedBetUseCase> logger)
+    {
+        _bets = bets ?? throw new ArgumentNullException(nameof(bets));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public async Task ExecuteAsync(Guid betId, CancellationToken ct = default)
+    {
+        await _bets.DeleteAsync(betId, ct).ConfigureAwait(false);
+        await _bets.SaveChangesAsync(ct).ConfigureAwait(false);
+        _logger.LogInformation("DeletePlacedBetUseCase: removed bet {BetId}", betId);
+    }
+}

src/Marathon.Application/UseCases/DeleteStrategyUseCase.cs

@@ -0,0 +1,26 @@
+using Marathon.Application.Abstractions;
+using Microsoft.Extensions.Logging;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Removes a saved strategy preset by id. Silent no-op when the id is unknown.
+/// </summary>
+public sealed class DeleteStrategyUseCase
+{
+    private readonly ISavedStrategyRepository _repo;
+    private readonly ILogger<DeleteStrategyUseCase> _logger;
+
+    public DeleteStrategyUseCase(ISavedStrategyRepository repo, ILogger<DeleteStrategyUseCase> logger)
+    {
+        _repo = repo ?? throw new ArgumentNullException(nameof(repo));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public async Task ExecuteAsync(Guid id, CancellationToken ct = default)
+    {
+        await _repo.DeleteAsync(id, ct).ConfigureAwait(false);
+        await _repo.SaveChangesAsync(ct).ConfigureAwait(false);
+        _logger.LogInformation("DeleteStrategyUseCase: removed preset {Id}", id);
+    }
+}

src/Marathon.Application/UseCases/DetectAnomaliesUseCase.cs

@@ -0,0 +1,184 @@
+using Marathon.Application.Abstractions;
+using Marathon.Application.Configuration;
+using Marathon.Domain.AnomalyDetection;
+using Marathon.Domain.Entities;
+using Marathon.Domain.ValueObjects;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Orchestrates one anomaly-detection cycle:
+/// <list type="number">
+///   <item>Loads all tracked events.</item>
+///   <item>For each event, fetches its last-24-hour live snapshots.</item>
+///   <item>Runs <see cref="AnomalyDetector"/> over the snapshot timeline.</item>
+///   <item>Persists any new anomalies that have not already been stored (dedup by EventId + Kind + DetectedAt minute-window).</item>
+/// </list>
+/// </summary>
+/// <remarks>
+/// 🟡 Optimisation opportunity (Phase 8/9): currently iterates ALL events and loads 24 h of
+/// snapshots per event. A future improvement is to track a "last detection run" timestamp per
+/// event so we only load new snapshots. This is intentionally deferred to keep Phase 7 scope
+/// focused on the detection algorithm.
+/// </remarks>
+public sealed class DetectAnomaliesUseCase
+{
+    private static readonly TimeSpan SnapshotLookback = TimeSpan.FromHours(24);
+
+    // Dedup window: two anomalies for the same event within this window are considered duplicates.
+    private static readonly TimeSpan DedupWindow = TimeSpan.FromMinutes(1);
+
+    private readonly IEventRepository _eventRepo;
+    private readonly ISnapshotRepository _snapshotRepo;
+    private readonly IAnomalyRepository _anomalyRepo;
+    private readonly AnomalyOptions _options;
+    private readonly ILogger<DetectAnomaliesUseCase> _logger;
+
+    public DetectAnomaliesUseCase(
+        IEventRepository eventRepo,
+        ISnapshotRepository snapshotRepo,
+        IAnomalyRepository anomalyRepo,
+        IOptions<AnomalyOptions> options,
+        ILogger<DetectAnomaliesUseCase> logger)
+    {
+        _eventRepo = eventRepo ?? throw new ArgumentNullException(nameof(eventRepo));
+        _snapshotRepo = snapshotRepo ?? throw new ArgumentNullException(nameof(snapshotRepo));
+        _anomalyRepo = anomalyRepo ?? throw new ArgumentNullException(nameof(anomalyRepo));
+        _options = (options ?? throw new ArgumentNullException(nameof(options))).Value;
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Executes one detection cycle.
+    /// </summary>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>Number of new anomalies persisted during this cycle.</returns>
+    public async Task<int> ExecuteAsync(CancellationToken ct)
+    {
+        _logger.LogInformation("DetectAnomaliesUseCase: cycle started");
+
+        var detectors = new IAnomalyDetector[]
+        {
+            new AnomalyDetector(
+                _options.SuspensionGapSeconds,
+                _options.OddsFlipThreshold,
+                _options.MinSnapshotCount),
+            new SteamMoveDetector(
+                _options.SteamMoveWindowSeconds,
+                _options.SteamMoveDriftThreshold,
+                _options.MinSnapshotCount,
+                _options.SuspensionGapSeconds),
+            new SuspensionFreezeDetector(
+                _options.SuspensionGapSeconds,
+                _options.SuspensionFreezeThreshold,
+                _options.MinSnapshotCount),
+            new OverroundCompressionDetector(
+                _options.OverroundWindowSeconds,
+                _options.OverroundCompressionThreshold,
+                _options.MinSnapshotCount,
+                _options.SuspensionGapSeconds),
+        };
+
+        var events = await _eventRepo.ListAsync(ct);
+        int newAnomalyCount = 0;
+
+        var now = MoscowTime.Now;
+        var from = now - SnapshotLookback;
+
+        // Hoisted outside the per-event loop: load existing anomalies ONCE per cycle
+        // and index them by event so dedup is O(1) per event instead of scanning the
+        // whole list each time (was O(events × anomalies)). Reviewer W1, Phase 7.
+        var existingAnomalies = await _anomalyRepo.ListAsync(ct);
+        var existingByEvent = existingAnomalies
+            .GroupBy(a => a.EventId)
+            .ToDictionary(g => g.Key, g => g.ToList());
+
+        // Single batched query for all events' snapshots — replaces the prior
+        // per-event ListByEventAsync round-trip (O(N) SQLite hits + N Include(Bets)
+        // payloads). Returns an empty list for events with no snapshots in range.
+        var eventIds = events.Select(e => e.Id).ToList();
+        var snapshotsByEvent = await _snapshotRepo.ListByEventsAsync(eventIds, from, now, ct);
+
+        foreach (var ev in events)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            try
+            {
+                var snapshots = snapshotsByEvent.TryGetValue(ev.Id, out var found)
+                    ? found
+                    : Array.Empty<OddsSnapshot>();
+                var existingForEvent = existingByEvent.TryGetValue(ev.Id, out var slice)
+                    ? slice
+                    : new List<Anomaly>();
+                newAnomalyCount += await ProcessEventAsync(detectors, ev, snapshots, existingForEvent, ct);
+            }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex,
+                    "DetectAnomaliesUseCase: failed to process event {EventId} — skipping",
+                    ev.Id.Value);
+            }
+        }
+
+        _logger.LogInformation(
+            "DetectAnomaliesUseCase: cycle done — {NewAnomalies} new anomalies across {TotalEvents} events",
+            newAnomalyCount, events.Count);
+
+        return newAnomalyCount;
+    }
+
+    // ── Private helpers ───────────────────────────────────────────────────────
+
+    private async Task<int> ProcessEventAsync(
+        IReadOnlyList<IAnomalyDetector> detectors,
+        Event ev,
+        IReadOnlyList<OddsSnapshot> snapshots,
+        List<Anomaly> existingForEvent,
+        CancellationToken ct)
+    {
+        // Fan out over every detector; dedup below keys on EventId + Kind so the flip,
+        // steam, and freeze signals for one event persist independently.
+        var detected = detectors
+            .SelectMany(d => d.Detect(ev.Id, snapshots))
+            .ToList();
+
+        if (detected.Count == 0)
+            return 0;
+
+        int persisted = 0;
+        foreach (var anomaly in detected)
+        {
+            if (IsDuplicate(anomaly, existingForEvent))
+                continue;
+
+            await _anomalyRepo.AddAsync(anomaly, ct);
+            existingForEvent.Add(anomaly); // Keep local list in sync so the same cycle doesn't re-add.
+            persisted++;
+        }
+
+        // One write per event rather than per anomaly — with three detectors an event
+        // can yield several new anomalies in a single cycle.
+        if (persisted > 0)
+            await _anomalyRepo.SaveChangesAsync(ct);
+
+        return persisted;
+    }
+
+    private static bool IsDuplicate(Anomaly candidate, IReadOnlyList<Anomaly> existing)
+    {
+        // Two anomalies are considered duplicates if they share the same EventId, Kind,
+        // and their DetectedAt timestamps fall within the dedup window.
+        return existing.Any(a =>
+            a.EventId == candidate.EventId &&
+            a.Kind == candidate.Kind &&
+            Math.Abs((a.DetectedAt - candidate.DetectedAt).TotalMinutes) <=
+                DedupWindow.TotalMinutes);
+    }
+}

src/Marathon.Application/UseCases/EvaluateAnomalyOutcomesUseCase.cs

@@ -0,0 +1,261 @@
+using System.Globalization;
+using Marathon.Application.Abstractions;
+using Marathon.Application.Reporting;
+using Marathon.Domain.AnomalyDetection;
+using Marathon.Domain.Entities;
+using Microsoft.Extensions.Logging;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Builds an <see cref="AnomalyOutcomeReport"/> by joining every persisted
+/// <see cref="Anomaly"/> with the originating event and its
+/// <see cref="EventResult"/>, then running the pure
+/// <see cref="AnomalyOutcomeEvaluator"/> over each pair.
+/// </summary>
+/// <remarks>
+/// <para>
+/// This is the answer to "does the SuspensionFlip detector actually predict the
+/// right side?" The report is the validator for the entire anomaly-detection
+/// premise of the product — without it, the algorithm's confidence score is
+/// just a number with no calibration.
+/// </para>
+/// <para>
+/// The use case loads all three collections in one pass each and performs the
+/// join in memory. Anomaly volumes are small (one per suspension interval per
+/// event) so this is well within budget. If volumes grow significantly the
+/// repository layer can later add a SQL-side join — the public shape of the
+/// report does not change.
+/// </para>
+/// </remarks>
+public sealed class EvaluateAnomalyOutcomesUseCase
+{
+    /// <summary>
+    /// Lowest score bin shown in the histogram. Score values below this never
+    /// appear because the detector enforces a configurable threshold (default
+    /// 0.30) — but the constant is repeated here so the bucketer is independent
+    /// of any specific configuration value.
+    /// </summary>
+    public const decimal MinScore = 0.30m;
+
+    /// <summary>
+    /// Bin width for the score histogram. Yields 7 buckets:
+    /// [0.30, 0.40), [0.40, 0.50), [0.50, 0.60), [0.60, 0.70), [0.70, 0.80),
+    /// [0.80, 0.90), [0.90, 1.00]. The last bin is closed on the right.
+    /// </summary>
+    public const decimal BinWidth = 0.10m;
+
+    private readonly IAnomalyRepository _anomalies;
+    private readonly IEventRepository _events;
+    private readonly IResultRepository _results;
+    private readonly ILogger<EvaluateAnomalyOutcomesUseCase> _logger;
+
+    public EvaluateAnomalyOutcomesUseCase(
+        IAnomalyRepository anomalies,
+        IEventRepository events,
+        IResultRepository results,
+        ILogger<EvaluateAnomalyOutcomesUseCase> logger)
+    {
+        _anomalies = anomalies ?? throw new ArgumentNullException(nameof(anomalies));
+        _events = events ?? throw new ArgumentNullException(nameof(events));
+        _results = results ?? throw new ArgumentNullException(nameof(results));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public async Task<AnomalyOutcomeReport> ExecuteAsync(CancellationToken ct)
+    {
+        _logger.LogInformation("EvaluateAnomalyOutcomesUseCase: report build started");
+
+        var anomalies = await _anomalies.ListAsync(ct).ConfigureAwait(false);
+        if (anomalies.Count == 0)
+        {
+            _logger.LogInformation(
+                "EvaluateAnomalyOutcomesUseCase: no anomalies — empty report");
+            return EmptyReport();
+        }
+
+        // Batched lookups — a single query each, replacing the prior per-event
+        // GetAsync round-trip (N+1 against SQLite).
+        var distinctEventIds = anomalies.Select(a => a.EventId).Distinct().ToList();
+
+        var eventLookup = await _events.GetManyAsync(distinctEventIds, ct).ConfigureAwait(false);
+        var resultLookup = await _results.GetManyAsync(distinctEventIds, ct).ConfigureAwait(false);
+
+        var eventTitles = new Dictionary<DomainEventId, string>(eventLookup.Count);
+        foreach (var (id, ev) in eventLookup)
+            eventTitles[id] = ev.Title;
+
+        // Evaluate every anomaly through the pure domain function.
+        var resolved = new List<ResolvedAnomaly>();
+        var unresolved = new List<ResolvedAnomaly>();
+        foreach (var anomaly in anomalies)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            eventLookup.TryGetValue(anomaly.EventId, out var ev);
+            resultLookup.TryGetValue(anomaly.EventId, out var result);
+
+            var evaluated = AnomalyOutcomeEvaluator.Evaluate(anomaly, ev?.Sport, result);
+
+            if (evaluated.Outcome == AnomalyOutcomeKind.Unresolved)
+                unresolved.Add(evaluated);
+            else
+                resolved.Add(evaluated);
+        }
+
+        var resolvedOrdered = resolved
+            .OrderByDescending(r => r.DetectedAt)
+            .ToList();
+        var unresolvedOrdered = unresolved
+            .OrderByDescending(r => r.DetectedAt)
+            .ToList();
+
+        var hitCount = resolvedOrdered.Count(r => r.Outcome == AnomalyOutcomeKind.Hit);
+        var missCount = resolvedOrdered.Count - hitCount;
+
+        var report = new AnomalyOutcomeReport(
+            TotalAnomalies: anomalies.Count,
+            ResolvedCount: resolvedOrdered.Count,
+            UnresolvedCount: unresolvedOrdered.Count,
+            HitCount: hitCount,
+            MissCount: missCount,
+            HitRate: ComputeRate(hitCount, resolvedOrdered.Count),
+            BySeverity: BuildSeverityBuckets(resolvedOrdered),
+            BySport: BuildSportBuckets(resolvedOrdered),
+            ByScoreBin: BuildScoreBins(resolvedOrdered),
+            ByKind: BuildKindBuckets(resolvedOrdered),
+            Resolved: resolvedOrdered,
+            Unresolved: unresolvedOrdered,
+            EventTitles: eventTitles);
+
+        _logger.LogInformation(
+            "EvaluateAnomalyOutcomesUseCase: report ready — total={Total}, resolved={Resolved}, hits={Hits}",
+            report.TotalAnomalies, report.ResolvedCount, report.HitCount);
+
+        return report;
+    }
+
+    // ── Bucketers ────────────────────────────────────────────────────────────
+
+    private static IReadOnlyList<OutcomeBucket> BuildSeverityBuckets(
+        IReadOnlyCollection<ResolvedAnomaly> resolved)
+    {
+        // Thresholds sourced from the Domain so the UI's severity badge and
+        // this report cannot drift out of sync — single source of truth.
+        return new[]
+        {
+            BuildBucket(OutcomeBucketKeys.SeverityLow,
+                resolved.Where(r => r.Score < AnomalySeverityThresholds.Medium)),
+            BuildBucket(OutcomeBucketKeys.SeverityMedium,
+                resolved.Where(r => r.Score >= AnomalySeverityThresholds.Medium
+                                 && r.Score < AnomalySeverityThresholds.High)),
+            BuildBucket(OutcomeBucketKeys.SeverityHigh,
+                resolved.Where(r => r.Score >= AnomalySeverityThresholds.High)),
+        };
+    }
+
+    private static IReadOnlyList<OutcomeBucket> BuildSportBuckets(
+        IReadOnlyCollection<ResolvedAnomaly> resolved)
+    {
+        return resolved
+            .Where(r => r.Sport is not null)
+            .GroupBy(r => r.Sport!.Value)
+            .OrderBy(g => g.Key)
+            .Select(g => BuildBucket(
+                key: string.Format(
+                    CultureInfo.InvariantCulture,
+                    "{0}{1}",
+                    OutcomeBucketKeys.SportPrefix,
+                    g.Key),
+                items: g))
+            .ToList();
+    }
+
+    private static IReadOnlyList<OutcomeBucket> BuildKindBuckets(
+        IReadOnlyCollection<ResolvedAnomaly> resolved)
+    {
+        // Only directional kinds resolve to a hit/miss (the evaluator leaves the rest
+        // Unresolved), so this naturally shows just the directional detectors.
+        return resolved
+            .GroupBy(r => r.Kind)
+            .OrderBy(g => (int)g.Key)
+            .Select(g => BuildBucket(
+                key: OutcomeBucketKeys.KindPrefix + g.Key,
+                items: g))
+            .ToList();
+    }
+
+    private static IReadOnlyList<OutcomeBucket> BuildScoreBins(
+        IReadOnlyCollection<ResolvedAnomaly> resolved)
+    {
+        // Default range is the canonical [0.30, 1.00] with seven 0.10-wide bins.
+        // If the operator has lowered the detector's flip threshold and we have
+        // resolved anomalies below 0.30, prepend additional bins so every row in
+        // the report shows up in exactly one bucket — the histogram total must
+        // equal ResolvedCount no matter how the detector is tuned.
+        var floor = MinScore;
+        if (resolved.Count > 0)
+        {
+            var lowest = resolved.Min(r => r.Score);
+            if (lowest < MinScore)
+            {
+                var binsBelow = Math.Ceiling((MinScore - lowest) / BinWidth);
+                floor = MinScore - binsBelow * BinWidth;
+                if (floor < 0m) floor = 0m;
+            }
+        }
+
+        var bins = new List<OutcomeBucket>();
+        for (var start = floor; start < 1.0m; start += BinWidth)
+        {
+            var binStart = start;
+            var binEnd = start + BinWidth;
+            var isLast = binEnd >= 1.0m;
+
+            // Last bin is closed on the right so 1.00 lands in [0.90, 1.00].
+            var inBin = resolved.Where(r =>
+                r.Score >= binStart &&
+                (isLast ? r.Score <= 1.0m : r.Score < binEnd));
+
+            var key = string.Format(
+                CultureInfo.InvariantCulture,
+                "{0}{1:0.00}-{2:0.00}",
+                OutcomeBucketKeys.BinPrefix,
+                binStart,
+                Math.Min(binEnd, 1.0m));
+
+            bins.Add(BuildBucket(key, inBin));
+        }
+        return bins;
+    }
+
+    private static OutcomeBucket BuildBucket(string key, IEnumerable<ResolvedAnomaly> items)
+    {
+        var list = items as IReadOnlyCollection<ResolvedAnomaly> ?? items.ToList();
+        var total = list.Count;
+        var hits = list.Count(r => r.Outcome == AnomalyOutcomeKind.Hit);
+        return new OutcomeBucket(key, total, hits, ComputeRate(hits, total));
+    }
+
+    private static decimal? ComputeRate(int numerator, int denominator) =>
+        denominator == 0
+            ? null
+            : Math.Round(numerator / (decimal)denominator, 4);
+
+    private static AnomalyOutcomeReport EmptyReport() =>
+        new(
+            TotalAnomalies: 0,
+            ResolvedCount: 0,
+            UnresolvedCount: 0,
+            HitCount: 0,
+            MissCount: 0,
+            HitRate: null,
+            BySeverity: Array.Empty<OutcomeBucket>(),
+            BySport: Array.Empty<OutcomeBucket>(),
+            ByScoreBin: Array.Empty<OutcomeBucket>(),
+            ByKind: Array.Empty<OutcomeBucket>(),
+            Resolved: Array.Empty<ResolvedAnomaly>(),
+            Unresolved: Array.Empty<ResolvedAnomaly>(),
+            EventTitles: new Dictionary<DomainEventId, string>());
+}

src/Marathon.Application/UseCases/ExportToCsvUseCase.cs

@@ -0,0 +1,134 @@
+using System.Globalization;
+using System.Text;
+using Marathon.Application.Abstractions;
+using Marathon.Application.Export;
+using Marathon.Application.Storage;
+using Marathon.Domain.ValueObjects;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Exports the bet journal and the paper-trading (forward-test) ledger to CSV files in
+/// the configured export directory, returning each file's path (or null when there is
+/// nothing to export). Mirrors <see cref="ExportToExcelUseCase"/>'s write-and-return-path
+/// contract; CSV needs no third-party library so it stays in the Application layer.
+/// </summary>
+public sealed class ExportToCsvUseCase
+{
+    // BOM so Excel opens UTF-8 (Cyrillic team names) correctly.
+    private static readonly Encoding Utf8Bom = new UTF8Encoding(encoderShouldEmitUTF8Identifier: true);
+
+    private readonly IPlacedBetRepository _bets;
+    private readonly IPaperBetRepository _paperBets;
+    private readonly IEventRepository _events;
+    private readonly IOptions<StorageOptions> _storage;
+    private readonly ILogger<ExportToCsvUseCase> _logger;
+
+    public ExportToCsvUseCase(
+        IPlacedBetRepository bets,
+        IPaperBetRepository paperBets,
+        IEventRepository events,
+        IOptions<StorageOptions> storage,
+        ILogger<ExportToCsvUseCase> logger)
+    {
+        _bets = bets ?? throw new ArgumentNullException(nameof(bets));
+        _paperBets = paperBets ?? throw new ArgumentNullException(nameof(paperBets));
+        _events = events ?? throw new ArgumentNullException(nameof(events));
+        _storage = storage ?? throw new ArgumentNullException(nameof(storage));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>Writes the bet journal to CSV; returns the path, or null when empty.</summary>
+    public async Task<string?> ExportJournalAsync(CancellationToken ct = default)
+    {
+        var bets = await _bets.ListAsync(ct).ConfigureAwait(false);
+        if (bets.Count == 0)
+            return null;
+
+        var titles = await TitlesAsync(bets.Select(b => b.EventId), ct).ConfigureAwait(false);
+
+        var header = new[]
+        {
+            "PlacedAt", "Event", "EventId", "Type", "Side", "Value", "Rate", "Stake", "Outcome", "Profit", "Notes",
+        };
+        var rows = bets
+            .OrderByDescending(b => b.PlacedAt)
+            .Select(b => (IReadOnlyList<string>)new[]
+            {
+                b.PlacedAt.ToString("yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture),
+                Title(titles, b.EventId),
+                Csv.NeutralizeFormula(b.EventId.Value),
+                b.Selection.Type.ToString(),
+                b.Selection.Side.ToString(),
+                b.Selection.Value?.Value.ToString(CultureInfo.InvariantCulture) ?? string.Empty,
+                b.Selection.Rate.Value.ToString(CultureInfo.InvariantCulture),
+                b.Stake.ToString(CultureInfo.InvariantCulture),
+                b.Outcome.ToString(),
+                b.NetProfit?.ToString(CultureInfo.InvariantCulture) ?? string.Empty,
+                Csv.NeutralizeFormula(b.Notes),
+            });
+
+        return await WriteAsync("journal", Csv.Document(header, rows), ct).ConfigureAwait(false);
+    }
+
+    /// <summary>Writes the paper-trading ledger to CSV; returns the path, or null when empty.</summary>
+    public async Task<string?> ExportPaperLedgerAsync(CancellationToken ct = default)
+    {
+        var bets = await _paperBets.ListAsync(ct).ConfigureAwait(false);
+        if (bets.Count == 0)
+            return null;
+
+        var titles = await TitlesAsync(bets.Select(b => b.EventId), ct).ConfigureAwait(false);
+
+        var header = new[]
+        {
+            "OpenedAt", "Event", "EventId", "PickedSide", "Rate", "Stake", "Outcome", "Payout", "SettledAt",
+        };
+        var rows = bets
+            .OrderByDescending(b => b.OpenedAt)
+            .Select(b => (IReadOnlyList<string>)new[]
+            {
+                b.OpenedAt.ToString("yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture),
+                Title(titles, b.EventId),
+                Csv.NeutralizeFormula(b.EventId.Value),
+                b.PickedSide.ToString(),
+                b.Rate.ToString(CultureInfo.InvariantCulture),
+                b.Stake.ToString(CultureInfo.InvariantCulture),
+                b.Outcome.ToString(),
+                b.Payout?.ToString(CultureInfo.InvariantCulture) ?? string.Empty,
+                b.SettledAt?.ToString("yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture) ?? string.Empty,
+            });
+
+        return await WriteAsync("forward-test", Csv.Document(header, rows), ct).ConfigureAwait(false);
+    }
+
+    private async Task<string> WriteAsync(string label, string content, CancellationToken ct)
+    {
+        var dir = _storage.Value.ExportDirectory;
+        Directory.CreateDirectory(dir);
+        var fileName = $"Marathon_{label}_{MoscowTime.Now:yyyy-MM-dd_HHmmss}.csv";
+        var path = Path.Combine(dir, fileName);
+        await File.WriteAllTextAsync(path, content, Utf8Bom, ct).ConfigureAwait(false);
+        _logger.LogInformation("ExportToCsvUseCase: wrote {Label} CSV → {Path}", label, path);
+        return path;
+    }
+
+    private async Task<IReadOnlyDictionary<DomainEventId, string>> TitlesAsync(
+        IEnumerable<DomainEventId> ids, CancellationToken ct)
+    {
+        var distinct = ids.Distinct().ToList();
+        var events = await _events.GetManyAsync(distinct, ct).ConfigureAwait(false);
+        var titles = new Dictionary<DomainEventId, string>(events.Count);
+        foreach (var (id, ev) in events)
+            titles[id] = ev.Title;
+        return titles;
+    }
+
+    // Titles are scraped ("Side1 vs Side2") so they're treated as untrusted text and
+    // neutralized against CSV/formula injection.
+    private static string Title(IReadOnlyDictionary<DomainEventId, string> titles, DomainEventId id) =>
+        Csv.NeutralizeFormula(titles.TryGetValue(id, out var t) ? t : id.Value);
+}

src/Marathon.Application/UseCases/ExportToExcelUseCase.cs

@@ -0,0 +1,54 @@
+using Marathon.Application.Abstractions;
+using Marathon.Application.Storage;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Exports odds snapshots for a date range to an Excel file, placing it in
+/// the configured export directory.
+/// </summary>
+public sealed class ExportToExcelUseCase
+{
+    private readonly IExcelExporter _exporter;
+    private readonly IOptions<StorageOptions> _storageOptions;
+    private readonly ILogger<ExportToExcelUseCase> _logger;
+
+    public ExportToExcelUseCase(
+        IExcelExporter exporter,
+        IOptions<StorageOptions> storageOptions,
+        ILogger<ExportToExcelUseCase> logger)
+    {
+        _exporter       = exporter       ?? throw new ArgumentNullException(nameof(exporter));
+        _storageOptions = storageOptions  ?? throw new ArgumentNullException(nameof(storageOptions));
+        _logger         = logger         ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Runs the export and returns the absolute path of the created file.
+    /// </summary>
+    /// <param name="range">Inclusive date range to export.</param>
+    /// <param name="kind">Which snapshots to include.</param>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>Absolute path of the written <c>.xlsx</c> file.</returns>
+    public async Task<string> ExecuteAsync(DateRange range, ExportKind kind, CancellationToken ct)
+    {
+        var exportDir = _storageOptions.Value.ExportDirectory;
+
+        // Ensure the output directory exists before handing off to the exporter.
+        Directory.CreateDirectory(exportDir);
+
+        _logger.LogInformation(
+            "ExportToExcelUseCase: exporting {Kind} snapshots for {From:yyyy-MM-dd}..{To:yyyy-MM-dd} → {Dir}",
+            kind, range.From, range.To, exportDir);
+
+        var outputPath = await _exporter.ExportAsync(range, kind, exportDir, ct);
+
+        _logger.LogInformation(
+            "ExportToExcelUseCase: export complete — file={Path}",
+            outputPath);
+
+        return outputPath;
+    }
+}

src/Marathon.Application/UseCases/GetPendingAnomalyNotificationsUseCase.cs

@@ -0,0 +1,62 @@
+using Marathon.Application.Abstractions;
+using Microsoft.Extensions.Logging;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Shapes the anomalies worth alerting on: those detected at or after a caller-supplied
+/// marker whose score clears a minimum, joined with their event titles. Pure of any
+/// transport concern — the dispatcher decides cadence and the sink decides delivery.
+/// </summary>
+/// <remarks>
+/// Results are ordered oldest-first so the caller can advance its "since" marker to the
+/// last item's <see cref="AnomalyNotification.DetectedAt"/> (plus one tick) without gaps
+/// or duplicates.
+/// </remarks>
+public sealed class GetPendingAnomalyNotificationsUseCase
+{
+    private readonly IAnomalyRepository _anomalies;
+    private readonly IEventRepository _events;
+    private readonly ILogger<GetPendingAnomalyNotificationsUseCase> _logger;
+
+    public GetPendingAnomalyNotificationsUseCase(
+        IAnomalyRepository anomalies,
+        IEventRepository events,
+        ILogger<GetPendingAnomalyNotificationsUseCase> logger)
+    {
+        _anomalies = anomalies ?? throw new ArgumentNullException(nameof(anomalies));
+        _events = events ?? throw new ArgumentNullException(nameof(events));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public async Task<IReadOnlyList<AnomalyNotification>> ExecuteAsync(
+        DateTimeOffset since,
+        decimal minScore,
+        CancellationToken ct)
+    {
+        // Date filter pushed to SQL; score filter is cheap in memory over the small slice.
+        var recent = await _anomalies.ListByDateRangeAsync(since, to: null, ct).ConfigureAwait(false);
+        var qualifying = recent.Where(a => a.Score >= minScore).ToList();
+        if (qualifying.Count == 0)
+            return Array.Empty<AnomalyNotification>();
+
+        var eventIds = qualifying.Select(a => a.EventId).Distinct().ToList();
+        var events = await _events.GetManyAsync(eventIds, ct).ConfigureAwait(false);
+
+        var notifications = qualifying
+            .OrderBy(a => a.DetectedAt)
+            .Select(a => new AnomalyNotification(
+                AnomalyId: a.Id,
+                EventTitle: events.TryGetValue(a.EventId, out var ev) ? ev.Title : a.EventId.Value,
+                Kind: a.Kind,
+                Score: a.Score,
+                DetectedAt: a.DetectedAt))
+            .ToList();
+
+        _logger.LogDebug(
+            "GetPendingAnomalyNotificationsUseCase: {Count} alert(s) since {Since:O} at minScore {MinScore}",
+            notifications.Count, since, minScore);
+
+        return notifications;
+    }
+}

src/Marathon.Application/UseCases/OpenPaperBetsUseCase.cs

@@ -0,0 +1,84 @@
+using Marathon.Application.Abstractions;
+using Marathon.Domain.AnomalyDetection;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Microsoft.Extensions.Logging;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Opens flat-stake paper bets for directional anomalies detected in
+/// (<c>since</c>..<c>until</c>] whose score clears the threshold and that don't
+/// already have one. The picked side is the post-flip favourite; the rate is that
+/// side's post-suspension rate — locking in the price the moment the signal fired.
+/// </summary>
+public sealed class OpenPaperBetsUseCase
+{
+    private readonly IAnomalyRepository _anomalies;
+    private readonly IPaperBetRepository _paperBets;
+    private readonly ILogger<OpenPaperBetsUseCase> _logger;
+
+    public OpenPaperBetsUseCase(
+        IAnomalyRepository anomalies,
+        IPaperBetRepository paperBets,
+        ILogger<OpenPaperBetsUseCase> logger)
+    {
+        _anomalies = anomalies ?? throw new ArgumentNullException(nameof(anomalies));
+        _paperBets = paperBets ?? throw new ArgumentNullException(nameof(paperBets));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>Returns the paper bets opened this pass (empty when nothing qualified).</summary>
+    public async Task<IReadOnlyList<PaperBet>> ExecuteAsync(
+        DateTimeOffset since,
+        DateTimeOffset until,
+        decimal minScore,
+        decimal flatStake,
+        CancellationToken ct = default)
+    {
+        if (flatStake <= 0m)
+            throw new ArgumentOutOfRangeException(nameof(flatStake), flatStake, "Flat stake must be positive.");
+
+        var anomalies = await _anomalies.ListByDateRangeAsync(since, until, ct).ConfigureAwait(false);
+
+        // Only directional kinds make a side prediction worth forward-testing; the rest
+        // are informational and would just measure the base favourite-win rate.
+        var candidates = anomalies
+            .Where(a => a.Kind.IsDirectional() && a.Score >= minScore)
+            .ToList();
+        if (candidates.Count == 0)
+            return Array.Empty<PaperBet>();
+
+        var existing = await _paperBets
+            .GetExistingAnomalyIdsAsync(candidates.Select(a => a.Id).ToList(), ct)
+            .ConfigureAwait(false);
+
+        var opened = new List<PaperBet>();
+        foreach (var anomaly in candidates)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            if (existing.Contains(anomaly.Id))
+                continue;
+
+            if (!AnomalyEvidenceParser.TryParse(anomaly.EvidenceJson, out var evidence))
+                continue;
+
+            var pick = evidence.PostSuspension.Favourite;
+            if (evidence.PostSuspension.RateFor(pick) is not { } rate || rate <= 1m)
+                continue;
+
+            opened.Add(PaperBet.Open(anomaly.Id, anomaly.EventId, pick, rate, flatStake, anomaly.DetectedAt));
+        }
+
+        if (opened.Count == 0)
+            return Array.Empty<PaperBet>();
+
+        foreach (var bet in opened)
+            await _paperBets.AddAsync(bet, ct).ConfigureAwait(false);
+        await _paperBets.SaveChangesAsync(ct).ConfigureAwait(false);
+
+        _logger.LogInformation("OpenPaperBetsUseCase: opened {Count} paper bet(s)", opened.Count);
+        return opened;
+    }
+}

src/Marathon.Application/UseCases/PullLiveOddsUseCase.cs

@@ -0,0 +1,156 @@
+using System.Collections.Concurrent;
+using Marathon.Application.Abstractions;
+using Marathon.Application.Configuration;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Discovers currently-live events from the bookmaker's <c>/su/live</c> listing,
+/// persists any not yet known to the database, and captures a fresh
+/// <see cref="OddsSource.Live"/> snapshot for each.
+/// </summary>
+/// <remarks>
+/// Live discovery is authoritative: events that go live without ever appearing
+/// in the upcoming list (late-added matches, in-play markets opened on demand)
+/// are picked up here. Pre-match-only events are NOT scraped by this use case —
+/// they would just be wasted requests against the bookmaker.
+/// </remarks>
+public sealed class PullLiveOddsUseCase
+{
+    private readonly IOddsScraper _scraper;
+    private readonly IEventRepository _eventRepo;
+    private readonly ISnapshotRepository _snapshotRepo;
+    private readonly IOptionsMonitor<ScrapingThrottle> _throttle;
+    private readonly ILogger<PullLiveOddsUseCase> _logger;
+
+    public PullLiveOddsUseCase(
+        IOddsScraper scraper,
+        IEventRepository eventRepo,
+        ISnapshotRepository snapshotRepo,
+        IOptionsMonitor<ScrapingThrottle> throttle,
+        ILogger<PullLiveOddsUseCase> logger)
+    {
+        _scraper      = scraper      ?? throw new ArgumentNullException(nameof(scraper));
+        _eventRepo    = eventRepo    ?? throw new ArgumentNullException(nameof(eventRepo));
+        _snapshotRepo = snapshotRepo ?? throw new ArgumentNullException(nameof(snapshotRepo));
+        _throttle     = throttle     ?? throw new ArgumentNullException(nameof(throttle));
+        _logger       = logger       ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Executes one live-odds polling cycle.
+    /// </summary>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>Number of live snapshots successfully captured.</returns>
+    public async Task<int> ExecuteAsync(CancellationToken ct)
+    {
+        _logger.LogInformation("PullLiveOddsUseCase: cycle started");
+
+        IReadOnlyList<Event> liveEvents;
+        try
+        {
+            liveEvents = await _scraper.ScrapeLiveAsync(ct);
+        }
+        catch (OperationCanceledException)
+        {
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex,
+                "PullLiveOddsUseCase: failed to fetch live event listing — skipping cycle");
+            return 0;
+        }
+
+        _logger.LogInformation(
+            "PullLiveOddsUseCase: scraper returned {Count} live events",
+            liveEvents.Count);
+
+        // Phase 1 — parallel HTTP fan-out: scrape every event's odds in parallel,
+        // capped at MaxConcurrentRequests. The scraper's rate limiter still
+        // throttles to RequestsPerSecond underneath this fan-out, so spikes are
+        // smoothed out before they reach the bookmaker. We deliberately do NOT
+        // touch the DbContext (or its repositories) inside the parallel block —
+        // EF Core DbContext is not thread-safe.
+        var scraped = new ConcurrentBag<(Event Live, OddsSnapshot Snapshot)>();
+        var maxParallelism = Math.Max(1, _throttle.CurrentValue.MaxConcurrentRequests);
+
+        var parallelOptions = new ParallelOptions
+        {
+            MaxDegreeOfParallelism = maxParallelism,
+            CancellationToken = ct,
+        };
+
+        await Parallel.ForEachAsync(liveEvents, parallelOptions, async (live, taskCt) =>
+        {
+            try
+            {
+                var snapshot = await _scraper.ScrapeEventOddsAsync(live, OddsSource.Live, taskCt);
+                scraped.Add((live, snapshot));
+            }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex,
+                    "PullLiveOddsUseCase: failed to capture live snapshot for event {EventId} — skipping",
+                    live.Id.Value);
+            }
+        });
+
+        // Phase 2 — sequential persistence. EF Core DbContext is single-threaded,
+        // so we apply each (event upsert + snapshot insert) one at a time.
+        int snapshotsCaptured = 0;
+        foreach (var (live, snapshot) in scraped)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            try
+            {
+                // Persist new live events — the upcoming poller may not have seen them
+                // yet (or never will, for matches added after their scheduled start).
+                // The Live page reads from the events table, so a new live row must
+                // exist before its snapshots become visible.
+                var existing = await _eventRepo.GetAsync(live.Id, ct);
+                if (existing is null)
+                {
+                    await _eventRepo.AddAsync(live, ct);
+                    await _eventRepo.SaveChangesAsync(ct);
+                }
+                else if (existing.EventPath is null && live.EventPath is not null)
+                {
+                    // Backfill EventPath on rows persisted before the column existed.
+                    var patched = existing with { EventPath = live.EventPath };
+                    await _eventRepo.UpdateAsync(patched, ct);
+                    await _eventRepo.SaveChangesAsync(ct);
+                }
+
+                await _snapshotRepo.AddAsync(snapshot, ct);
+                await _snapshotRepo.SaveChangesAsync(ct);
+                snapshotsCaptured++;
+            }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex,
+                    "PullLiveOddsUseCase: failed to persist live snapshot for event {EventId} — skipping",
+                    live.Id.Value);
+            }
+        }
+
+        _logger.LogInformation(
+            "PullLiveOddsUseCase: cycle done — snapshots captured for {Count}/{Total} live events",
+            snapshotsCaptured, liveEvents.Count);
+
+        return snapshotsCaptured;
+    }
+}

src/Marathon.Application/UseCases/PullResultsUseCase.cs

@@ -0,0 +1,201 @@
+using Marathon.Application.Abstractions;
+using Marathon.Application.Storage;
+using Marathon.Domain.Entities;
+using Microsoft.Extensions.Logging;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Per-event progress emitted by <see cref="PullResultsUseCase.ExecuteAsync"/>.
+/// Used by the UI to render a progress bar and the running list of loaded
+/// results — each tick is fired AFTER the bookmaker has been queried for
+/// <see cref="EventId"/>, so the UI sees one tick per inspected event.
+/// </summary>
+/// <param name="Processed">Total events processed so far (1-based at the first tick).</param>
+/// <param name="Total">Total candidates in this run.</param>
+/// <param name="EventId">The event just processed.</param>
+/// <param name="Outcome">What happened — see <see cref="ResultLoadOutcome"/>.</param>
+/// <param name="Result">The persisted <see cref="EventResult"/> when <paramref name="Outcome"/> is <see cref="ResultLoadOutcome.Loaded"/>; otherwise null.</param>
+public sealed record PullResultsProgress(
+    int Processed,
+    int Total,
+    DomainEventId EventId,
+    ResultLoadOutcome Outcome,
+    EventResult? Result);
+
+/// <summary>What happened to a single candidate event during a results load.</summary>
+public enum ResultLoadOutcome
+{
+    /// <summary>A new <see cref="EventResult"/> was scraped and persisted.</summary>
+    Loaded,
+
+    /// <summary>The event already had a stored result — no work was done.</summary>
+    AlreadyLoaded,
+
+    /// <summary>The match isn't complete yet — try again later.</summary>
+    NotYetComplete,
+
+    /// <summary>The scrape failed (HTTP, parse, etc.). Logged at warning.</summary>
+    Failed,
+}
+
+/// <summary>
+/// Loads completed-event results into the database.
+/// </summary>
+/// <remarks>
+/// <para>
+/// For each candidate event, the use case:
+/// </para>
+/// <list type="number">
+///   <item>Skips it if a result is already stored (idempotent).</item>
+///   <item>Calls <see cref="IOddsScraper.ScrapeEventResultAsync"/>, which returns
+///         a non-null <see cref="EventResult"/> only when the bookmaker reports
+///         <c>matchIsComplete=true</c>.</item>
+///   <item>Persists the result and increments the loaded count.</item>
+/// </list>
+/// <para>
+/// Candidates are either an explicit <paramref name="selection"/> list or — when
+/// null/empty — every event scheduled in <c>range</c>.
+/// </para>
+/// </remarks>
+public sealed class PullResultsUseCase
+{
+    private readonly IOddsScraper _scraper;
+    private readonly IEventRepository _eventRepo;
+    private readonly IResultRepository _resultRepo;
+    private readonly ILogger<PullResultsUseCase> _logger;
+
+    public PullResultsUseCase(
+        IOddsScraper scraper,
+        IEventRepository eventRepo,
+        IResultRepository resultRepo,
+        ILogger<PullResultsUseCase> logger)
+    {
+        _scraper = scraper ?? throw new ArgumentNullException(nameof(scraper));
+        _eventRepo = eventRepo ?? throw new ArgumentNullException(nameof(eventRepo));
+        _resultRepo = resultRepo ?? throw new ArgumentNullException(nameof(resultRepo));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Inspects events for completion and persists results.
+    /// </summary>
+    /// <param name="range">Date range used when <paramref name="selection"/> is null or empty.</param>
+    /// <param name="selection">
+    /// When non-empty, only these event IDs are inspected.
+    /// When null or empty, all events in <paramref name="range"/> without a stored
+    /// result are inspected.
+    /// </param>
+    /// <param name="progress">
+    /// Optional progress sink. Receives one update per candidate AFTER the scrape
+    /// has resolved. Suitable for binding to a UI progress indicator.
+    /// </param>
+    /// <param name="ct">Cancellation token.</param>
+    public async Task<(int Inspected, int ResultsLoaded, int Skipped)> ExecuteAsync(
+        DateRange range,
+        IReadOnlyList<DomainEventId>? selection,
+        IProgress<PullResultsProgress>? progress,
+        CancellationToken ct)
+    {
+        _logger.LogInformation(
+            "PullResultsUseCase: cycle started — range={From:O}..{To:O}, selection={SelectionCount}",
+            range.From, range.To, selection?.Count.ToString() ?? "all");
+
+        var candidates = await ResolveCandidatesAsync(range, selection, ct).ConfigureAwait(false);
+
+        int inspected = 0;
+        int resultsLoaded = 0;
+        int skipped = 0;
+
+        foreach (var ev in candidates)
+        {
+            ct.ThrowIfCancellationRequested();
+            inspected++;
+
+            var (outcome, persisted) = await ProcessOneAsync(ev, ct).ConfigureAwait(false);
+            switch (outcome)
+            {
+                case ResultLoadOutcome.Loaded: resultsLoaded++; break;
+                case ResultLoadOutcome.AlreadyLoaded: skipped++; break;
+            }
+
+            progress?.Report(new PullResultsProgress(
+                Processed: inspected,
+                Total: candidates.Count,
+                EventId: ev.Id,
+                Outcome: outcome,
+                Result: persisted));
+        }
+
+        _logger.LogInformation(
+            "PullResultsUseCase: cycle done — inspected={Inspected}, loaded={Loaded}, skipped={Skipped}",
+            inspected, resultsLoaded, skipped);
+
+        return (inspected, resultsLoaded, skipped);
+    }
+
+    /// <summary>Convenience overload without progress reporting (worker callers).</summary>
+    public Task<(int Inspected, int ResultsLoaded, int Skipped)> ExecuteAsync(
+        DateRange range,
+        IReadOnlyList<DomainEventId>? selection,
+        CancellationToken ct)
+        => ExecuteAsync(range, selection, progress: null, ct);
+
+    private async Task<IReadOnlyList<Event>> ResolveCandidatesAsync(
+        DateRange range,
+        IReadOnlyList<DomainEventId>? selection,
+        CancellationToken ct)
+    {
+        if (selection is { Count: > 0 })
+        {
+            // Batched load (was N+1); preserve the caller's selection order and
+            // silently drop ids with no stored event.
+            var events = await _eventRepo.GetManyAsync(selection, ct).ConfigureAwait(false);
+            var resolved = new List<Event>(selection.Count);
+            foreach (var id in selection)
+            {
+                if (events.TryGetValue(id, out var ev))
+                    resolved.Add(ev);
+            }
+            return resolved;
+        }
+
+        return await _eventRepo.ListByDateRangeAsync(range, ct).ConfigureAwait(false);
+    }
+
+    private async Task<(ResultLoadOutcome Outcome, EventResult? Persisted)> ProcessOneAsync(
+        Event ev,
+        CancellationToken ct)
+    {
+        try
+        {
+            var existing = await _resultRepo.GetAsync(ev.Id, ct).ConfigureAwait(false);
+            if (existing is not null)
+            {
+                return (ResultLoadOutcome.AlreadyLoaded, null);
+            }
+
+            var scraped = await _scraper.ScrapeEventResultAsync(ev, ct).ConfigureAwait(false);
+            if (scraped is null)
+            {
+                return (ResultLoadOutcome.NotYetComplete, null);
+            }
+
+            await _resultRepo.AddAsync(scraped, ct).ConfigureAwait(false);
+            await _resultRepo.SaveChangesAsync(ct).ConfigureAwait(false);
+            return (ResultLoadOutcome.Loaded, scraped);
+        }
+        catch (OperationCanceledException)
+        {
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex,
+                "PullResultsUseCase: error processing event {EventId} — skipping",
+                ev.Id.Value);
+            return (ResultLoadOutcome.Failed, null);
+        }
+    }
+}

src/Marathon.Application/UseCases/PullUpcomingEventsUseCase.cs

@@ -0,0 +1,146 @@
+using System.Collections.Concurrent;
+using Marathon.Application.Abstractions;
+using Marathon.Application.Configuration;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Fetches the current pre-match event listing, persists new events (skipping
+/// duplicates by <see cref="Domain.ValueObjects.EventId"/>), and captures an
+/// initial pre-match odds snapshot for every returned event.
+/// </summary>
+public sealed class PullUpcomingEventsUseCase
+{
+    private readonly IOddsScraper _scraper;
+    private readonly IEventRepository _eventRepo;
+    private readonly ISnapshotRepository _snapshotRepo;
+    private readonly IOptionsMonitor<ScrapingThrottle> _throttle;
+    private readonly ILogger<PullUpcomingEventsUseCase> _logger;
+
+    public PullUpcomingEventsUseCase(
+        IOddsScraper scraper,
+        IEventRepository eventRepo,
+        ISnapshotRepository snapshotRepo,
+        IOptionsMonitor<ScrapingThrottle> throttle,
+        ILogger<PullUpcomingEventsUseCase> logger)
+    {
+        _scraper      = scraper      ?? throw new ArgumentNullException(nameof(scraper));
+        _eventRepo    = eventRepo    ?? throw new ArgumentNullException(nameof(eventRepo));
+        _snapshotRepo = snapshotRepo ?? throw new ArgumentNullException(nameof(snapshotRepo));
+        _throttle     = throttle     ?? throw new ArgumentNullException(nameof(throttle));
+        _logger       = logger       ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Executes one polling cycle: scrape → persist new events → capture snapshots.
+    /// </summary>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>
+    /// A tuple of <c>(EventsProcessed, NewEvents, SnapshotsCaptured)</c>.
+    /// <c>EventsProcessed</c> is the total number returned by the scraper.
+    /// <c>NewEvents</c> is how many were not already in the DB.
+    /// <c>SnapshotsCaptured</c> is how many snapshots were successfully saved.
+    /// </returns>
+    public async Task<(int EventsProcessed, int NewEvents, int SnapshotsCaptured)> ExecuteAsync(
+        CancellationToken ct)
+    {
+        _logger.LogInformation("PullUpcomingEventsUseCase: cycle started");
+
+        var events = await _scraper.ScrapeUpcomingAsync(sportFilter: null, ct);
+        int eventsProcessed = events.Count;
+
+        _logger.LogInformation(
+            "PullUpcomingEventsUseCase: scraper returned {Count} events",
+            eventsProcessed);
+
+        // Phase 1 — parallel HTTP fan-out. Each event's odds snapshot is scraped
+        // concurrently up to MaxConcurrentRequests; the scraper's rate limiter
+        // smooths spikes underneath. We do NOT touch the DbContext here — EF Core
+        // is single-threaded.
+        var scraped = new ConcurrentBag<(Event Event, OddsSnapshot Snapshot)>();
+        var maxParallelism = Math.Max(1, _throttle.CurrentValue.MaxConcurrentRequests);
+
+        var parallelOptions = new ParallelOptions
+        {
+            MaxDegreeOfParallelism = maxParallelism,
+            CancellationToken = ct,
+        };
+
+        await Parallel.ForEachAsync(events, parallelOptions, async (ev, taskCt) =>
+        {
+            try
+            {
+                var snapshot = await _scraper.ScrapeEventOddsAsync(ev, OddsSource.PreMatch, taskCt);
+                scraped.Add((ev, snapshot));
+            }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex,
+                    "PullUpcomingEventsUseCase: failed to capture snapshot for event {EventId} — skipping",
+                    ev.Id.Value);
+            }
+        });
+
+        // Phase 2 — sequential persistence. Upsert event row, then save the
+        // captured snapshot. Per-event try/catch keeps a single failure from
+        // aborting the whole cycle.
+        int newEvents = 0;
+        int snapshotsCaptured = 0;
+        foreach (var (ev, snapshot) in scraped)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            try
+            {
+                var existing = await _eventRepo.GetAsync(ev.Id, ct);
+                if (existing is null)
+                {
+                    await _eventRepo.AddAsync(ev, ct);
+                    await _eventRepo.SaveChangesAsync(ct);
+                    newEvents++;
+                }
+            }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex,
+                    "PullUpcomingEventsUseCase: failed to persist event {EventId} — skipping",
+                    ev.Id.Value);
+            }
+
+            try
+            {
+                await _snapshotRepo.AddAsync(snapshot, ct);
+                await _snapshotRepo.SaveChangesAsync(ct);
+                snapshotsCaptured++;
+            }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex,
+                    "PullUpcomingEventsUseCase: failed to persist snapshot for event {EventId} — skipping",
+                    ev.Id.Value);
+            }
+        }
+
+        _logger.LogInformation(
+            "PullUpcomingEventsUseCase: cycle done — processed={Processed}, new={New}, snapshots={Snapshots}",
+            eventsProcessed, newEvents, snapshotsCaptured);
+
+        return (eventsProcessed, newEvents, snapshotsCaptured);
+    }
+}

src/Marathon.Application/UseCases/RecordPlacedBetUseCase.cs

@@ -0,0 +1,90 @@
+using Marathon.Application.Abstractions;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Microsoft.Extensions.Logging;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Records a new <see cref="PlacedBet"/> entered manually via the Journal UI.
+/// </summary>
+/// <remarks>
+/// <para>
+/// The use case validates that the referenced event exists, then persists the
+/// bet. If the event already has a final result the bet is graded on the spot
+/// via <see cref="Marathon.Domain.Betting.BetOutcomeResolver"/> — saves the
+/// user a round-trip to the resolver page when entering historical wagers.
+/// </para>
+/// </remarks>
+public sealed class RecordPlacedBetUseCase
+{
+    private readonly IPlacedBetRepository _bets;
+    private readonly IEventRepository _events;
+    private readonly IResultRepository _results;
+    private readonly ILogger<RecordPlacedBetUseCase> _logger;
+
+    public RecordPlacedBetUseCase(
+        IPlacedBetRepository bets,
+        IEventRepository events,
+        IResultRepository results,
+        ILogger<RecordPlacedBetUseCase> logger)
+    {
+        _bets = bets ?? throw new ArgumentNullException(nameof(bets));
+        _events = events ?? throw new ArgumentNullException(nameof(events));
+        _results = results ?? throw new ArgumentNullException(nameof(results));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Persists <paramref name="bet"/>. Returns the bet as stored — if the
+    /// event already has a result, the returned instance reflects the graded
+    /// <see cref="BetOutcome"/>.
+    /// </summary>
+    /// <exception cref="InvalidOperationException">
+    /// The bet references an unknown event. The journal does not allow free-form
+    /// event codes — wagers must be on events the scraper has captured so the
+    /// CLV calculator can compare against the closing snapshot.
+    /// </exception>
+    public async Task<PlacedBet> ExecuteAsync(PlacedBet bet, CancellationToken ct = default)
+    {
+        ArgumentNullException.ThrowIfNull(bet);
+
+        // Confirm the event exists in the local store.
+        var ev = await _events.GetAsync(bet.EventId, ct).ConfigureAwait(false);
+        if (ev is null)
+        {
+            throw new InvalidOperationException(
+                $"Cannot record a bet on unknown event '{bet.EventId.Value}'. " +
+                "The event must already be present in the scrape store.");
+        }
+
+        var toPersist = bet;
+
+        // Auto-grade if a result is already available.
+        if (bet.Outcome == BetOutcome.Pending)
+        {
+            var result = await _results.GetAsync(bet.EventId, ct).ConfigureAwait(false);
+            if (result is not null)
+            {
+                var graded = Marathon.Domain.Betting.BetOutcomeResolver.Resolve(bet.Selection, result);
+                if (graded is not null)
+                {
+                    toPersist = bet.WithOutcome(graded.Value);
+                    _logger.LogInformation(
+                        "RecordPlacedBetUseCase: bet {BetId} on event {EventId} auto-graded as {Outcome}",
+                        toPersist.Id, ((DomainEventId)toPersist.EventId).Value, graded.Value);
+                }
+            }
+        }
+
+        await _bets.AddAsync(toPersist, ct).ConfigureAwait(false);
+        await _bets.SaveChangesAsync(ct).ConfigureAwait(false);
+
+        _logger.LogInformation(
+            "RecordPlacedBetUseCase: persisted bet {BetId} on event {EventId} stake={Stake} rate={Rate}",
+            toPersist.Id, ((DomainEventId)toPersist.EventId).Value, toPersist.Stake, toPersist.Selection.Rate.Value);
+
+        return toPersist;
+    }
+}

src/Marathon.Application/UseCases/ResolvePendingBetsUseCase.cs

@@ -0,0 +1,84 @@
+using Marathon.Application.Abstractions;
+using Marathon.Domain.Betting;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Microsoft.Extensions.Logging;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Sweeps the journal for <see cref="BetOutcome.Pending"/> bets whose events
+/// have been graded, and updates them in bulk via
+/// <see cref="BetOutcomeResolver"/>.
+/// </summary>
+/// <remarks>
+/// Called on demand from the Journal page's "Resolve pending" button. The
+/// design is idempotent — bets that cannot be auto-graded (period-scope, or
+/// no result yet) are left untouched and surface again on the next pass.
+/// </remarks>
+public sealed class ResolvePendingBetsUseCase
+{
+    private readonly IPlacedBetRepository _bets;
+    private readonly IResultRepository _results;
+    private readonly ILogger<ResolvePendingBetsUseCase> _logger;
+
+    public ResolvePendingBetsUseCase(
+        IPlacedBetRepository bets,
+        IResultRepository results,
+        ILogger<ResolvePendingBetsUseCase> logger)
+    {
+        _bets = bets ?? throw new ArgumentNullException(nameof(bets));
+        _results = results ?? throw new ArgumentNullException(nameof(results));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>
+    /// Returns the number of bets that were transitioned out of Pending in this pass.
+    /// </summary>
+    public async Task<int> ExecuteAsync(CancellationToken ct = default)
+    {
+        var pending = await _bets.ListByOutcomeAsync(BetOutcome.Pending, ct).ConfigureAwait(false);
+        if (pending.Count == 0)
+        {
+            _logger.LogInformation("ResolvePendingBetsUseCase: no pending bets");
+            return 0;
+        }
+
+        // Cache results per event so we do not re-query for each bet on the same event.
+        var resultCache = new Dictionary<DomainEventId, EventResult?>();
+        var resolvedCount = 0;
+
+        foreach (var bet in pending)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            if (!resultCache.TryGetValue(bet.EventId, out var result))
+            {
+                result = await _results.GetAsync(bet.EventId, ct).ConfigureAwait(false);
+                resultCache[bet.EventId] = result;
+            }
+
+            if (result is null) continue;
+
+            var graded = BetOutcomeResolver.Resolve(bet.Selection, result);
+            if (graded is null) continue;
+
+            var updated = bet.WithOutcome(graded.Value);
+            await _bets.UpdateAsync(updated, ct).ConfigureAwait(false);
+            resolvedCount++;
+        }
+
+        // Save before logging — if the batch fails, an exception bubbles out and
+        // the success-count log is never emitted; we never report a graded count
+        // that was rolled back.
+        if (resolvedCount > 0)
+            await _bets.SaveChangesAsync(ct).ConfigureAwait(false);
+
+        _logger.LogInformation(
+            "ResolvePendingBetsUseCase: graded {Resolved} of {Pending} pending bets",
+            resolvedCount, pending.Count);
+
+        return resolvedCount;
+    }
+}

src/Marathon.Application/UseCases/RunBacktestUseCase.cs

@@ -0,0 +1,124 @@
+using Marathon.Application.Abstractions;
+using Marathon.Application.Storage;
+using Marathon.Domain.AnomalyDetection;
+using Marathon.Domain.Backtesting;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Microsoft.Extensions.Logging;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Loads every persisted anomaly paired with its event metadata and result,
+/// constructs <see cref="BacktestCandidate"/> rows, and runs the pure
+/// <see cref="BacktestSimulator"/> with the supplied strategy.
+/// </summary>
+/// <remarks>
+/// <para>
+/// Composes the two analytics features already in place: anomalies come from
+/// the SuspensionFlip detector, and results come from the results loader. The
+/// simulator never touches I/O — all data loading happens here, then the run
+/// is a deterministic function of (strategy, candidates).
+/// </para>
+/// <para>
+/// Anomalies whose evidence JSON fails to parse, whose source events lack a
+/// final result, or whose event row has been pruned are filtered out before
+/// simulation. They are not counted as "skipped" by the simulator — the
+/// simulator's <see cref="BacktestResult.Skipped"/> counter only reflects
+/// runs the strategy chose not to bet on (below threshold, no edge, etc.).
+/// </para>
+/// </remarks>
+public sealed class RunBacktestUseCase
+{
+    private readonly IAnomalyRepository _anomalies;
+    private readonly IEventRepository _events;
+    private readonly IResultRepository _results;
+    private readonly ILogger<RunBacktestUseCase> _logger;
+
+    public RunBacktestUseCase(
+        IAnomalyRepository anomalies,
+        IEventRepository events,
+        IResultRepository results,
+        ILogger<RunBacktestUseCase> logger)
+    {
+        _anomalies = anomalies ?? throw new ArgumentNullException(nameof(anomalies));
+        _events = events ?? throw new ArgumentNullException(nameof(events));
+        _results = results ?? throw new ArgumentNullException(nameof(results));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>Runs the backtest over every graded anomaly (no date filter).</summary>
+    public Task<BacktestResult> ExecuteAsync(
+        BacktestStrategy strategy,
+        CancellationToken ct = default)
+        => ExecuteAsync(strategy, dateRange: null, ct);
+
+    /// <summary>
+    /// Runs the backtest over anomalies detected within <paramref name="dateRange"/>
+    /// (inclusive); pass <c>null</c> to include every graded anomaly. The date filter
+    /// is pushed to SQL via <see cref="IAnomalyRepository.ListByDateRangeAsync"/>.
+    /// </summary>
+    public async Task<BacktestResult> ExecuteAsync(
+        BacktestStrategy strategy,
+        DateRange? dateRange,
+        CancellationToken ct)
+    {
+        ArgumentNullException.ThrowIfNull(strategy);
+
+        _logger.LogInformation(
+            "RunBacktestUseCase: started — bankroll={Bankroll}, minScore={MinScore}, stakeRule={Rule}, range={Range}",
+            strategy.StartingBankroll, strategy.MinScore, strategy.StakeRule,
+            dateRange is null ? "all" : $"{dateRange.From:O}..{dateRange.To:O}");
+
+        var anomalies = dateRange is null
+            ? await _anomalies.ListAsync(ct).ConfigureAwait(false)
+            : await _anomalies.ListByDateRangeAsync(dateRange.From, dateRange.To, ct).ConfigureAwait(false);
+        if (anomalies.Count == 0)
+        {
+            _logger.LogInformation("RunBacktestUseCase: no anomalies — empty result");
+            return BacktestSimulator.Run(strategy, Array.Empty<BacktestCandidate>());
+        }
+
+        // Batched lookups — a single query each, replacing the prior per-event
+        // GetAsync round-trip (N+1 against SQLite).
+        var distinctEventIds = anomalies.Select(a => a.EventId).Distinct().ToList();
+
+        var eventLookup = await _events.GetManyAsync(distinctEventIds, ct).ConfigureAwait(false);
+        var resultLookup = await _results.GetManyAsync(distinctEventIds, ct).ConfigureAwait(false);
+
+        var titles = new Dictionary<DomainEventId, string>(eventLookup.Count);
+        foreach (var (id, ev) in eventLookup)
+            titles[id] = ev.Title;
+
+        var candidates = new List<BacktestCandidate>(anomalies.Count);
+        foreach (var anomaly in anomalies)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            // Only directional kinds are betting signals; SuspensionFreeze (favourite
+            // unchanged) is informational and must not be staked or it would skew ROI.
+            if (!anomaly.Kind.IsDirectional())
+                continue;
+
+            // Cannot simulate a bet whose event hasn't been graded yet.
+            if (!resultLookup.TryGetValue(anomaly.EventId, out var result))
+                continue;
+
+            if (!AnomalyEvidenceParser.TryParse(anomaly.EvidenceJson, out var evidence))
+                continue;
+
+            eventLookup.TryGetValue(anomaly.EventId, out var ev);
+            candidates.Add(new BacktestCandidate(anomaly, evidence, result, ev?.Sport));
+        }
+
+        var simResult = BacktestSimulator.Run(strategy, candidates, titles);
+
+        _logger.LogInformation(
+            "RunBacktestUseCase: done — bets={Bets}, wins={Wins}, losses={Losses}, ROI={Roi:0.##}%, finalBankroll={Final}",
+            simResult.BetsPlaced, simResult.Wins, simResult.Losses,
+            simResult.RoiPercent ?? 0m, simResult.FinalBankroll);
+
+        return simResult;
+    }
+}

src/Marathon.Application/UseCases/SaveStrategyUseCase.cs

@@ -0,0 +1,50 @@
+using Marathon.Application.Abstractions;
+using Marathon.Domain.Backtesting;
+using Microsoft.Extensions.Logging;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Persists a named backtest-strategy preset. Upserts by name: saving under an
+/// existing name overwrites that preset's configuration (keeping its identity and
+/// original creation timestamp); a fresh name creates a new preset.
+/// </summary>
+public sealed class SaveStrategyUseCase
+{
+    private readonly ISavedStrategyRepository _repo;
+    private readonly ILogger<SaveStrategyUseCase> _logger;
+
+    public SaveStrategyUseCase(ISavedStrategyRepository repo, ILogger<SaveStrategyUseCase> logger)
+    {
+        _repo = repo ?? throw new ArgumentNullException(nameof(repo));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>Saves <paramref name="strategy"/> under <paramref name="name"/>.</summary>
+    /// <exception cref="ArgumentException">The name is empty or exceeds the length bound.</exception>
+    public async Task<SavedStrategy> ExecuteAsync(
+        string name, BacktestStrategy strategy, CancellationToken ct = default)
+    {
+        ArgumentNullException.ThrowIfNull(strategy);
+
+        // Validates + trims the name once, up front (throws ArgumentException if bad).
+        var candidate = SavedStrategy.Create(name, strategy);
+
+        var existing = await _repo.GetByNameAsync(candidate.Name, ct).ConfigureAwait(false);
+        if (existing is not null)
+        {
+            var updated = existing with { Strategy = strategy };
+            await _repo.UpdateAsync(updated, ct).ConfigureAwait(false);
+            await _repo.SaveChangesAsync(ct).ConfigureAwait(false);
+            _logger.LogInformation(
+                "SaveStrategyUseCase: overwrote preset {Name} ({Id})", updated.Name, updated.Id);
+            return updated;
+        }
+
+        await _repo.AddAsync(candidate, ct).ConfigureAwait(false);
+        await _repo.SaveChangesAsync(ct).ConfigureAwait(false);
+        _logger.LogInformation(
+            "SaveStrategyUseCase: created preset {Name} ({Id})", candidate.Name, candidate.Id);
+        return candidate;
+    }
+}

src/Marathon.Application/UseCases/SettlePaperBetsUseCase.cs

@@ -0,0 +1,61 @@
+using Marathon.Application.Abstractions;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+using Microsoft.Extensions.Logging;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Settles every open (<see cref="BetOutcome.Pending"/>) paper bet whose event now has
+/// a final result — Won when the picked side matches the winner, otherwise Lost. Bets
+/// on events that aren't graded yet stay open and are retried next cycle.
+/// </summary>
+public sealed class SettlePaperBetsUseCase
+{
+    private readonly IPaperBetRepository _paperBets;
+    private readonly IResultRepository _results;
+    private readonly ILogger<SettlePaperBetsUseCase> _logger;
+
+    public SettlePaperBetsUseCase(
+        IPaperBetRepository paperBets,
+        IResultRepository results,
+        ILogger<SettlePaperBetsUseCase> logger)
+    {
+        _paperBets = paperBets ?? throw new ArgumentNullException(nameof(paperBets));
+        _results = results ?? throw new ArgumentNullException(nameof(results));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <summary>Returns the number of paper bets settled this pass.</summary>
+    public async Task<int> ExecuteAsync(CancellationToken ct = default)
+    {
+        var open = await _paperBets.ListByOutcomeAsync(BetOutcome.Pending, ct).ConfigureAwait(false);
+        if (open.Count == 0)
+            return 0;
+
+        // Batched result lookup — one query, not one per open bet.
+        var eventIds = open.Select(b => b.EventId).Distinct().ToList();
+        var results = await _results.GetManyAsync(eventIds, ct).ConfigureAwait(false);
+
+        var settledAt = MoscowTime.Now;
+        var settled = 0;
+        foreach (var bet in open)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            if (!results.TryGetValue(bet.EventId, out var result))
+                continue; // event not graded yet
+
+            await _paperBets.UpdateAsync(bet.SettleAgainst(result.WinnerSide, settledAt), ct).ConfigureAwait(false);
+            settled++;
+        }
+
+        if (settled > 0)
+        {
+            await _paperBets.SaveChangesAsync(ct).ConfigureAwait(false);
+            _logger.LogInformation("SettlePaperBetsUseCase: settled {Count} paper bet(s)", settled);
+        }
+
+        return settled;
+    }
+}

src/Marathon.Application/UseCases/UpdatePlacedBetUseCase.cs

@@ -0,0 +1,96 @@
+using Marathon.Application.Abstractions;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Microsoft.Extensions.Logging;
+using DomainEventId = Marathon.Domain.ValueObjects.EventId;
+
+namespace Marathon.Application.UseCases;
+
+/// <summary>
+/// Edits an existing <see cref="PlacedBet"/> in the journal — selection, stake, or
+/// notes. The original <see cref="PlacedBet.PlacedAt"/> is preserved; the outcome is
+/// re-graded from scratch (so changing the selection or event re-settles correctly).
+/// </summary>
+public sealed class UpdatePlacedBetUseCase
+{
+    private readonly IPlacedBetRepository _bets;
+    private readonly IEventRepository _events;
+    private readonly IResultRepository _results;
+    private readonly ILogger<UpdatePlacedBetUseCase> _logger;
+
+    public UpdatePlacedBetUseCase(
+        IPlacedBetRepository bets,
+        IEventRepository events,
+        IResultRepository results,
+        ILogger<UpdatePlacedBetUseCase> logger)
+    {
+        _bets = bets ?? throw new ArgumentNullException(nameof(bets));
+        _events = events ?? throw new ArgumentNullException(nameof(events));
+        _results = results ?? throw new ArgumentNullException(nameof(results));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    /// <exception cref="InvalidOperationException">
+    /// The bet id is unknown, or the (possibly changed) event isn't in the store.
+    /// </exception>
+    public async Task<PlacedBet> ExecuteAsync(
+        Guid id,
+        DomainEventId eventId,
+        Bet selection,
+        decimal stake,
+        string? notes,
+        CancellationToken ct = default)
+    {
+        ArgumentNullException.ThrowIfNull(eventId);
+        ArgumentNullException.ThrowIfNull(selection);
+
+        var existing = await _bets.GetAsync(id, ct).ConfigureAwait(false)
+            ?? throw new InvalidOperationException($"Cannot update unknown bet '{id}'.");
+
+        var ev = await _events.GetAsync(eventId, ct).ConfigureAwait(false);
+        if (ev is null)
+        {
+            throw new InvalidOperationException(
+                $"Cannot point a bet at unknown event '{eventId.Value}'. " +
+                "The event must already be present in the scrape store.");
+        }
+
+        // Only the selection or the event affects grading. When neither changed (e.g. a
+        // stake/notes-only edit) keep the existing outcome — re-grading from Pending here
+        // would SILENTLY UN-SETTLE a won/lost bet whose result row has since been pruned by
+        // snapshot retention (the journal is FK-free and outlives result pruning). A
+        // still-Pending bet is always (re)graded, mirroring RecordPlacedBetUseCase.
+        var gradingInputChanged = !existing.EventId.Equals(eventId)
+                               || !existing.Selection.Equals(selection);
+        var regrade = gradingInputChanged || existing.Outcome == BetOutcome.Pending;
+
+        var toPersist = new PlacedBet(
+            Id: id,
+            EventId: eventId,
+            Selection: selection,
+            Stake: stake,
+            PlacedAt: existing.PlacedAt,
+            Outcome: regrade ? BetOutcome.Pending : existing.Outcome,
+            Notes: notes);
+
+        if (regrade)
+        {
+            var result = await _results.GetAsync(eventId, ct).ConfigureAwait(false);
+            if (result is not null)
+            {
+                var graded = Marathon.Domain.Betting.BetOutcomeResolver.Resolve(toPersist.Selection, result);
+                if (graded is not null)
+                    toPersist = toPersist.WithOutcome(graded.Value);
+            }
+        }
+
+        await _bets.UpdateAsync(toPersist, ct).ConfigureAwait(false);
+        await _bets.SaveChangesAsync(ct).ConfigureAwait(false);
+
+        _logger.LogInformation(
+            "UpdatePlacedBetUseCase: updated bet {BetId} on event {EventId} stake={Stake} outcome={Outcome}",
+            id, eventId.Value, stake, toPersist.Outcome);
+
+        return toPersist;
+    }
+}

src/Marathon.Domain/AnomalyDetection/AnomalyDetector.cs

@@ -0,0 +1,148 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Pure domain service that analyses a chronological sequence of live <see cref="OddsSnapshot"/>
+/// records for a single event and returns any detected <see cref="Anomaly"/> instances.
+///
+/// Algorithm (SuspensionFlip):
+/// <list type="number">
+///   <item>Filter to <see cref="OddsSource.Live"/> snapshots and sort by <c>CapturedAt</c>.</item>
+///   <item>Return empty if fewer than <c>minSnapshotCount</c> live snapshots are available.</item>
+///   <item>Walk adjacent pairs; identify gaps larger than <c>suspensionGapSeconds</c>.</item>
+///   <item>For each suspension, extract Match-Win bets from pre/post snapshots, compute
+///         implied probability vectors and normalise them to sum to 1.</item>
+///   <item>Compute flip score = max(|p_post[i] − p_pre[i]|) across sides.</item>
+///   <item>If flip score ≥ <c>oddsFlipThreshold</c> AND the favourite changed
+///         (argmax of implied probabilities differs), emit one <see cref="Anomaly"/>.</item>
+/// </list>
+///
+/// This class is stateless and deterministic — identical inputs always produce identical output.
+/// It has no I/O or DI dependencies. Evidence formatting is delegated to
+/// <see cref="MatchWinEvidence"/> so every detector kind writes the identical shape.
+/// </summary>
+public sealed class AnomalyDetector : IAnomalyDetector
+{
+    private readonly int _suspensionGapSeconds;
+    private readonly decimal _oddsFlipThreshold;
+    private readonly int _minSnapshotCount;
+
+    /// <param name="suspensionGapSeconds">
+    /// Minimum gap between adjacent live snapshots (in seconds) to classify as a suspension.
+    /// Default per spec: 60.
+    /// </param>
+    /// <param name="oddsFlipThreshold">
+    /// Minimum implied-probability delta to classify a post-suspension odds change as a flip.
+    /// Default per spec: 0.30 (30 percentage points).
+    /// </param>
+    /// <param name="minSnapshotCount">
+    /// Minimum number of live snapshots required before detection runs.
+    /// Default per spec: 3.
+    /// </param>
+    public AnomalyDetector(int suspensionGapSeconds, decimal oddsFlipThreshold, int minSnapshotCount)
+    {
+        if (suspensionGapSeconds <= 0)
+            throw new ArgumentOutOfRangeException(nameof(suspensionGapSeconds),
+                suspensionGapSeconds, "Must be positive.");
+
+        if (oddsFlipThreshold is <= 0m or >= 1m)
+            throw new ArgumentOutOfRangeException(nameof(oddsFlipThreshold),
+                oddsFlipThreshold, "Must be in (0, 1).");
+
+        if (minSnapshotCount < 2)
+            throw new ArgumentOutOfRangeException(nameof(minSnapshotCount),
+                minSnapshotCount, "Must be at least 2 to form at least one pair.");
+
+        _suspensionGapSeconds = suspensionGapSeconds;
+        _oddsFlipThreshold    = oddsFlipThreshold;
+        _minSnapshotCount     = minSnapshotCount;
+    }
+
+    /// <inheritdoc />
+    public IReadOnlyList<Anomaly> Detect(EventId eventId, IReadOnlyList<OddsSnapshot> snapshots)
+    {
+        ArgumentNullException.ThrowIfNull(eventId);
+        ArgumentNullException.ThrowIfNull(snapshots);
+
+        // Step 1 — filter to Live snapshots only; suspension/flip is a live phenomenon.
+        var liveSnapshots = snapshots
+            .Where(s => s.Source == OddsSource.Live)
+            .OrderBy(s => s.CapturedAt)
+            .ToList();
+
+        // Step 2 — guard: need a minimum count to form meaningful intervals.
+        if (liveSnapshots.Count < _minSnapshotCount)
+            return Array.Empty<Anomaly>();
+
+        var anomalies = new List<Anomaly>();
+        var suspensionGap = TimeSpan.FromSeconds(_suspensionGapSeconds);
+
+        // Step 3 — identify suspension intervals.
+        for (int i = 0; i < liveSnapshots.Count - 1; i++)
+        {
+            var pre  = liveSnapshots[i];
+            var post = liveSnapshots[i + 1];
+
+            var gap = post.CapturedAt - pre.CapturedAt;
+            if (gap <= suspensionGap)
+                continue;
+
+            var interval = new SuspensionInterval(pre, post);
+            var anomaly = TryDetectFlip(eventId, interval);
+            if (anomaly is not null)
+                anomalies.Add(anomaly);
+        }
+
+        return anomalies.AsReadOnly();
+    }
+
+    // ── Private helpers ──────────────────────────────────────────────────────
+
+    private Anomaly? TryDetectFlip(EventId eventId, SuspensionInterval interval)
+    {
+        // Extract Match-Win implied probabilities from each snapshot.
+        var preProbs  = MatchWinEvidence.Extract(interval.PreSuspension);
+        var postProbs = MatchWinEvidence.Extract(interval.PostSuspension);
+
+        // Cannot compute flip if either snapshot lacks Win bets.
+        if (preProbs is null || postProbs is null)
+            return null;
+
+        // Step 4 — compute flip score = max(|p_post[i] − p_pre[i]|) across common sides.
+        decimal flipScore = 0m;
+        flipScore = Math.Max(flipScore, Math.Abs(postProbs.P1 - preProbs.P1));
+        flipScore = Math.Max(flipScore, Math.Abs(postProbs.P2 - preProbs.P2));
+        if (preProbs.PDraw.HasValue && postProbs.PDraw.HasValue)
+        {
+            flipScore = Math.Max(flipScore,
+                Math.Abs(postProbs.PDraw.Value - preProbs.PDraw.Value));
+        }
+
+        // Step 5 — favourite-changed test: argmax of implied probability must differ.
+        bool favouriteChanged =
+            MatchWinEvidence.Favourite(preProbs) != MatchWinEvidence.Favourite(postProbs);
+
+        if (flipScore < _oddsFlipThreshold || !favouriteChanged)
+            return null;
+
+        // Clamp score to [0, 1] before constructing the Anomaly (domain invariant).
+        var clampedScore = Math.Min(1m, flipScore);
+
+        // Step 6 — build evidence JSON via the shared formatter.
+        var evidenceJson = MatchWinEvidence.BuildJson(
+            (int)interval.Gap.TotalSeconds,
+            interval.PreSuspension, preProbs,
+            interval.PostSuspension, postProbs);
+
+        return new Anomaly(
+            Id:          Guid.NewGuid(),
+            EventId:     eventId,
+            DetectedAt:  MoscowTime.Now,
+            Kind:        AnomalyKind.SuspensionFlip,
+            Score:       clampedScore,
+            EvidenceJson: evidenceJson);
+    }
+}

src/Marathon.Domain/AnomalyDetection/AnomalyEvidenceData.cs

@@ -0,0 +1,158 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Strongly typed projection of the JSON payload written by <see cref="AnomalyDetector"/>
+/// into <see cref="Anomaly.EvidenceJson"/>. Captures pre- and post-suspension snapshots
+/// of normalised implied probabilities and raw rates for the Match-Win market.
+/// </summary>
+/// <remarks>
+/// The evaluator and any reader that needs to inspect an anomaly's evidence should
+/// parse via <see cref="AnomalyEvidenceParser.TryParse"/> rather than re-implement
+/// the JSON shape — the detector owns the schema.
+/// </remarks>
+public sealed record AnomalyEvidenceData(
+    int SuspensionGapSeconds,
+    AnomalyEvidenceSide PreSuspension,
+    AnomalyEvidenceSide PostSuspension);
+
+/// <summary>
+/// One side (pre or post) of a suspension interval. Probabilities are normalised
+/// so that <c>P1 + (PDraw ?? 0) + P2 == 1</c>. Two-way markets (e.g. tennis)
+/// leave <see cref="PDraw"/> and <see cref="RateDraw"/> null.
+/// </summary>
+public sealed record AnomalyEvidenceSide(
+    DateTimeOffset CapturedAt,
+    decimal P1,
+    decimal? PDraw,
+    decimal P2,
+    decimal Rate1,
+    decimal? RateDraw,
+    decimal Rate2)
+{
+    /// <summary>
+    /// The side carrying the highest normalised implied probability — i.e.,
+    /// the bookmaker's favourite at this point in time.
+    /// </summary>
+    public Side Favourite
+    {
+        get
+        {
+            // Three-way: include Draw in the argmax.
+            var best = Side.Side1;
+            var bestValue = P1;
+            if (PDraw is { } pd && pd > bestValue)
+            {
+                best = Side.Draw;
+                bestValue = pd;
+            }
+            if (P2 > bestValue)
+            {
+                best = Side.Side2;
+            }
+            return best;
+        }
+    }
+
+    /// <summary>
+    /// The decimal rate offered on <paramref name="side"/> at this snapshot, or null
+    /// for a non-win side (Less/More) or an absent Draw market.
+    /// </summary>
+    public decimal? RateFor(Side side) => side switch
+    {
+        Side.Side1 => Rate1,
+        Side.Side2 => Rate2,
+        Side.Draw => RateDraw,
+        _ => null,
+    };
+}
+
+/// <summary>
+/// Parses the <see cref="Anomaly.EvidenceJson"/> string emitted by
+/// <see cref="AnomalyDetector"/>. Tolerant of malformed payloads — returns false
+/// rather than throwing so callers can skip un-parseable anomalies silently.
+/// </summary>
+public static class AnomalyEvidenceParser
+{
+    private static readonly JsonSerializerOptions JsonOptions = new()
+    {
+        PropertyNameCaseInsensitive = true,
+    };
+
+    /// <summary>
+    /// Attempts to deserialise the evidence JSON. Returns <c>true</c> only when
+    /// both pre- and post-suspension snapshots are present.
+    /// </summary>
+    public static bool TryParse(string? evidenceJson, out AnomalyEvidenceData data)
+    {
+        data = default!;
+        if (string.IsNullOrWhiteSpace(evidenceJson)) return false;
+
+        try
+        {
+            var dto = JsonSerializer.Deserialize<EvidenceDto>(evidenceJson, JsonOptions);
+            if (dto is null || dto.PreSuspension is null || dto.PostSuspension is null)
+                return false;
+
+            data = new AnomalyEvidenceData(
+                SuspensionGapSeconds: dto.SuspensionGapSeconds,
+                PreSuspension: ToSide(dto.PreSuspension),
+                PostSuspension: ToSide(dto.PostSuspension));
+            return true;
+        }
+        catch (JsonException)
+        {
+            return false;
+        }
+    }
+
+    private static AnomalyEvidenceSide ToSide(EvidenceSideDto dto) =>
+        new(
+            CapturedAt: dto.CapturedAt,
+            P1: dto.P1 ?? 0m,
+            PDraw: dto.PDraw,
+            P2: dto.P2 ?? 0m,
+            Rate1: dto.Rate1 ?? 0m,
+            RateDraw: dto.RateDraw,
+            Rate2: dto.Rate2 ?? 0m);
+
+    private sealed class EvidenceDto
+    {
+        [JsonPropertyName("suspensionGapSeconds")]
+        public int SuspensionGapSeconds { get; init; }
+
+        [JsonPropertyName("preSuspension")]
+        public EvidenceSideDto? PreSuspension { get; init; }
+
+        [JsonPropertyName("postSuspension")]
+        public EvidenceSideDto? PostSuspension { get; init; }
+    }
+
+    private sealed class EvidenceSideDto
+    {
+        [JsonPropertyName("capturedAt")]
+        public DateTimeOffset CapturedAt { get; init; }
+
+        [JsonPropertyName("p1")]
+        public decimal? P1 { get; init; }
+
+        [JsonPropertyName("pDraw")]
+        public decimal? PDraw { get; init; }
+
+        [JsonPropertyName("p2")]
+        public decimal? P2 { get; init; }
+
+        [JsonPropertyName("rate1")]
+        public decimal? Rate1 { get; init; }
+
+        [JsonPropertyName("rateDraw")]
+        public decimal? RateDraw { get; init; }
+
+        [JsonPropertyName("rate2")]
+        public decimal? Rate2 { get; init; }
+    }
+}

src/Marathon.Domain/AnomalyDetection/AnomalyOutcome.cs

@@ -0,0 +1,51 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Verdict produced by comparing an anomaly's predicted post-flip favourite
+/// against the actual <see cref="EventResult.WinnerSide"/>.
+/// </summary>
+public enum AnomalyOutcomeKind
+{
+    /// <summary>
+    /// The post-flip favourite (the side the bookmaker shortened odds on AFTER
+    /// the suspension) ended up winning. The flip was directionally correct.
+    /// </summary>
+    Hit,
+
+    /// <summary>
+    /// The post-flip favourite did NOT win. The flip pointed at the wrong side.
+    /// </summary>
+    Miss,
+
+    /// <summary>
+    /// No <see cref="EventResult"/> is available yet — outcome cannot be judged.
+    /// </summary>
+    Unresolved,
+}
+
+/// <summary>
+/// One anomaly paired with its evaluated outcome. Surfaced to the UI so each
+/// resolved anomaly can be reviewed individually (e.g., when investigating
+/// why the algorithm got a specific event wrong).
+/// </summary>
+/// <remarks>
+/// <see cref="PreFlipFavourite"/> and <see cref="PostFlipFavourite"/> are null
+/// when the anomaly's evidence JSON could not be parsed — the outcome will be
+/// <see cref="AnomalyOutcomeKind.Unresolved"/> in that case. Encoding the
+/// absence keeps consumers from being shown a fabricated side.
+/// </remarks>
+public sealed record ResolvedAnomaly(
+    Guid AnomalyId,
+    EventId EventId,
+    DateTimeOffset DetectedAt,
+    decimal Score,
+    AnomalyKind Kind,
+    SportCode? Sport,
+    Side? PreFlipFavourite,
+    Side? PostFlipFavourite,
+    Side? ActualWinner,
+    AnomalyOutcomeKind Outcome);

src/Marathon.Domain/AnomalyDetection/AnomalyOutcomeEvaluator.cs

@@ -0,0 +1,136 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Pure domain function that evaluates whether a <see cref="AnomalyKind.SuspensionFlip"/>
+/// anomaly's prediction (the post-suspension favourite) matched the actual
+/// <see cref="EventResult.WinnerSide"/>.
+/// </summary>
+/// <remarks>
+/// <para>
+/// A "hit" is recorded when the side carrying the highest implied probability
+/// in <see cref="AnomalyEvidenceData.PostSuspension"/> equals
+/// <see cref="EventResult.WinnerSide"/>. For two-way markets (tennis), Draw is
+/// not a possible favourite — the evaluator naturally never emits Draw there.
+/// </para>
+/// <para>
+/// Stateless, deterministic, no I/O. Safe to call in tight loops.
+/// </para>
+/// </remarks>
+public static class AnomalyOutcomeEvaluator
+{
+    /// <summary>
+    /// Evaluates one anomaly against its event (optional metadata) and its result
+    /// (optional — null when the match hasn't been graded yet).
+    /// </summary>
+    /// <param name="anomaly">The persisted anomaly.</param>
+    /// <param name="sport">
+    /// The event's sport — surfaced into <see cref="ResolvedAnomaly"/> so the UI
+    /// can group by sport. Null when the originating event row is missing.
+    /// </param>
+    /// <param name="result">The event's final result, if known.</param>
+    /// <returns>
+    /// A <see cref="ResolvedAnomaly"/> with <see cref="AnomalyOutcomeKind.Unresolved"/>
+    /// when <paramref name="result"/> is null or the evidence JSON cannot be parsed,
+    /// otherwise <see cref="AnomalyOutcomeKind.Hit"/> / <see cref="AnomalyOutcomeKind.Miss"/>.
+    /// </returns>
+    public static ResolvedAnomaly Evaluate(
+        Anomaly anomaly,
+        SportCode? sport,
+        EventResult? result)
+    {
+        ArgumentNullException.ThrowIfNull(anomaly);
+
+        if (!AnomalyEvidenceParser.TryParse(anomaly.EvidenceJson, out var data))
+        {
+            // Cannot determine favourite without evidence; treat as unresolved.
+            return new ResolvedAnomaly(
+                AnomalyId: anomaly.Id,
+                EventId: anomaly.EventId,
+                DetectedAt: anomaly.DetectedAt,
+                Score: anomaly.Score,
+                Kind: anomaly.Kind,
+                Sport: sport,
+                PreFlipFavourite: null,
+                PostFlipFavourite: null,
+                ActualWinner: result?.WinnerSide,
+                Outcome: AnomalyOutcomeKind.Unresolved);
+        }
+
+        var preFav = data.PreSuspension.Favourite;
+        var postFav = data.PostSuspension.Favourite;
+
+        // Non-directional kinds (e.g. SuspensionFreeze — the favourite did NOT change)
+        // make no side prediction. Grading them as "favourite won" would just measure the
+        // base favourite-win rate, polluting the hit-rate and score-bin calibration, so we
+        // leave them Unresolved (the favourites are still surfaced for display).
+        if (!anomaly.Kind.IsDirectional())
+        {
+            return new ResolvedAnomaly(
+                AnomalyId: anomaly.Id,
+                EventId: anomaly.EventId,
+                DetectedAt: anomaly.DetectedAt,
+                Score: anomaly.Score,
+                Kind: anomaly.Kind,
+                Sport: sport,
+                PreFlipFavourite: preFav,
+                PostFlipFavourite: postFav,
+                ActualWinner: result?.WinnerSide,
+                Outcome: AnomalyOutcomeKind.Unresolved);
+        }
+
+        if (result is null)
+        {
+            return new ResolvedAnomaly(
+                AnomalyId: anomaly.Id,
+                EventId: anomaly.EventId,
+                DetectedAt: anomaly.DetectedAt,
+                Score: anomaly.Score,
+                Kind: anomaly.Kind,
+                Sport: sport,
+                PreFlipFavourite: preFav,
+                PostFlipFavourite: postFav,
+                ActualWinner: null,
+                Outcome: AnomalyOutcomeKind.Unresolved);
+        }
+
+        // Guard rail for sport-specific impossibilities. A two-way market
+        // (e.g. tennis) cannot produce a Draw outcome — if one shows up the
+        // EventResult disagrees with the evidence schema, so we refuse to
+        // grade it instead of silently counting it as a Miss.
+        var isTwoWay = data.PreSuspension.PDraw is null && data.PostSuspension.PDraw is null;
+        if (isTwoWay && result.WinnerSide == Side.Draw)
+        {
+            return new ResolvedAnomaly(
+                AnomalyId: anomaly.Id,
+                EventId: anomaly.EventId,
+                DetectedAt: anomaly.DetectedAt,
+                Score: anomaly.Score,
+                Kind: anomaly.Kind,
+                Sport: sport,
+                PreFlipFavourite: preFav,
+                PostFlipFavourite: postFav,
+                ActualWinner: result.WinnerSide,
+                Outcome: AnomalyOutcomeKind.Unresolved);
+        }
+
+        var outcome = postFav == result.WinnerSide
+            ? AnomalyOutcomeKind.Hit
+            : AnomalyOutcomeKind.Miss;
+
+        return new ResolvedAnomaly(
+            AnomalyId: anomaly.Id,
+            EventId: anomaly.EventId,
+            DetectedAt: anomaly.DetectedAt,
+            Score: anomaly.Score,
+            Kind: anomaly.Kind,
+            Sport: sport,
+            PreFlipFavourite: preFav,
+            PostFlipFavourite: postFav,
+            ActualWinner: result.WinnerSide,
+            Outcome: outcome);
+    }
+}

src/Marathon.Domain/AnomalyDetection/AnomalySeverityThresholds.cs

@@ -0,0 +1,29 @@
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Single source of truth for the severity bucket boundaries that the UI
+/// pill / badge, the Insights breakdowns, and any future reporter share.
+/// </summary>
+/// <remarks>
+/// Buckets are inclusive on the left, exclusive on the right (except High
+/// which extends to 1.00 inclusive):
+/// <list type="bullet">
+///   <item>Low      [<see cref="Low"/>,    <see cref="Medium"/>)</item>
+///   <item>Medium   [<see cref="Medium"/>, <see cref="High"/>)</item>
+///   <item>High     [<see cref="High"/>,   1.00]</item>
+/// </list>
+/// Defined at the Domain layer so both the Application reporter and the
+/// Marathon.UI severity rules consume the same numbers — re-tuning happens
+/// in one place.
+/// </remarks>
+public static class AnomalySeverityThresholds
+{
+    /// <summary>Lower bound of the Low bucket. Matches the detector's default flip threshold.</summary>
+    public const decimal Low = 0.30m;
+
+    /// <summary>Lower bound of the Medium bucket.</summary>
+    public const decimal Medium = 0.45m;
+
+    /// <summary>Lower bound of the High bucket.</summary>
+    public const decimal High = 0.60m;
+}

src/Marathon.Domain/AnomalyDetection/IAnomalyDetector.cs

@@ -0,0 +1,18 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// A pure, stateless detector that scans one event's snapshot timeline and returns
+/// any anomalies it finds. Implementations are deterministic and free of I/O so they
+/// can be composed (fanned out) and unit-tested in isolation.
+/// </summary>
+public interface IAnomalyDetector
+{
+    /// <summary>
+    /// Analyses <paramref name="snapshots"/> for <paramref name="eventId"/> and returns
+    /// 0 or more anomalies. May be empty; never null.
+    /// </summary>
+    IReadOnlyList<Anomaly> Detect(EventId eventId, IReadOnlyList<OddsSnapshot> snapshots);
+}

src/Marathon.Domain/AnomalyDetection/MatchWinEvidence.cs

@@ -0,0 +1,124 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Shared helper for the match-win implied-probability extraction and the canonical
+/// pre/post evidence-JSON shape used by every <see cref="IAnomalyDetector"/>.
+/// </summary>
+/// <remarks>
+/// Centralising the evidence format here guarantees that all detector kinds write the
+/// identical on-disk shape, so the UI parser (<c>AnomalyEvidenceParser</c>) and the
+/// outcome evaluator (<see cref="AnomalyOutcomeEvaluator"/>) work for every kind
+/// without branching. The <c>suspensionGapSeconds</c> field carries the elapsed
+/// seconds between the two snapshots — a suspension gap for flips, a drift window for
+/// steam moves.
+/// </remarks>
+internal static class MatchWinEvidence
+{
+    private static readonly JsonSerializerOptions JsonOptions = new()
+    {
+        WriteIndented = false,
+        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
+    };
+
+    /// <summary>
+    /// Normalised match-win implied probabilities + raw rates for a snapshot.
+    /// <see cref="Overround"/> is the raw implied-probability sum (the bookmaker's
+    /// margin/vig, &gt;= 1.0) before normalisation.
+    /// </summary>
+    public sealed record Probabilities(
+        decimal P1,
+        decimal? PDraw,
+        decimal P2,
+        decimal Rate1,
+        decimal? RateDraw,
+        decimal Rate2,
+        decimal Overround);
+
+    /// <summary>
+    /// Extracts normalised match-win implied probabilities, or null when the snapshot
+    /// lacks both Side1 and Side2 Match-Win bets.
+    /// </summary>
+    public static Probabilities? Extract(OddsSnapshot snapshot)
+    {
+        var matchWinBets = snapshot.Bets
+            .Where(b => b.Scope is MatchScope && b.Type == BetType.Win)
+            .ToList();
+
+        var win1 = matchWinBets.FirstOrDefault(b => b.Side == Side.Side1);
+        var win2 = matchWinBets.FirstOrDefault(b => b.Side == Side.Side2);
+        if (win1 is null || win2 is null)
+            return null;
+
+        var drawBet = snapshot.Bets
+            .FirstOrDefault(b => b.Scope is MatchScope && b.Type == BetType.Draw);
+
+        // Raw implied probabilities: p = 1 / rate; normalise so they sum to 1.
+        decimal rawP1 = 1m / win1.Rate.Value;
+        decimal rawP2 = 1m / win2.Rate.Value;
+        decimal rawDraw = drawBet is not null ? 1m / drawBet.Rate.Value : 0m;
+        decimal total = rawP1 + rawP2 + rawDraw;
+
+        return new Probabilities(
+            P1: rawP1 / total,
+            PDraw: drawBet is not null ? rawDraw / total : null,
+            P2: rawP2 / total,
+            Rate1: win1.Rate.Value,
+            RateDraw: drawBet?.Rate.Value,
+            Rate2: win2.Rate.Value,
+            Overround: total);
+    }
+
+    /// <summary>Label of the side carrying the highest normalised implied probability.</summary>
+    public static string Favourite(Probabilities p)
+    {
+        if (p.PDraw.HasValue && p.PDraw.Value > p.P1 && p.PDraw.Value > p.P2)
+            return "Draw";
+        return p.P1 >= p.P2 ? "Side1" : "Side2";
+    }
+
+    /// <summary>Serialises the canonical pre/post evidence payload.</summary>
+    public static string BuildJson(
+        int gapSeconds,
+        OddsSnapshot pre,
+        Probabilities preProbs,
+        OddsSnapshot post,
+        Probabilities postProbs)
+    {
+        var payload = new EvidencePayload(
+            SuspensionGapSeconds: gapSeconds,
+            PreSuspension: ToEvidence(pre, preProbs),
+            PostSuspension: ToEvidence(post, postProbs));
+
+        return JsonSerializer.Serialize(payload, JsonOptions);
+    }
+
+    private static SnapshotEvidence ToEvidence(OddsSnapshot snapshot, Probabilities p) =>
+        new(
+            CapturedAt: snapshot.CapturedAt.ToString("O"),
+            P1: p.P1,
+            PDraw: p.PDraw,
+            P2: p.P2,
+            Rate1: p.Rate1,
+            RateDraw: p.RateDraw,
+            Rate2: p.Rate2);
+
+    private sealed record EvidencePayload(
+        [property: JsonPropertyName("suspensionGapSeconds")] int SuspensionGapSeconds,
+        [property: JsonPropertyName("preSuspension")] SnapshotEvidence PreSuspension,
+        [property: JsonPropertyName("postSuspension")] SnapshotEvidence PostSuspension);
+
+    private sealed record SnapshotEvidence(
+        [property: JsonPropertyName("capturedAt")] string CapturedAt,
+        [property: JsonPropertyName("p1")] decimal P1,
+        [property: JsonPropertyName("pDraw")] decimal? PDraw,
+        [property: JsonPropertyName("p2")] decimal P2,
+        [property: JsonPropertyName("rate1")] decimal Rate1,
+        [property: JsonPropertyName("rateDraw")] decimal? RateDraw,
+        [property: JsonPropertyName("rate2")] decimal Rate2);
+}

src/Marathon.Domain/AnomalyDetection/OverroundCompressionDetector.cs

@@ -0,0 +1,115 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Detects an "overround compression": the bookmaker's margin (the raw implied-probability
+/// sum, &gt;= 1.0) drops sharply over a short CONTINUOUS window — the book tightens its vig,
+/// often ahead of news or when it is confident in the line.
+/// </summary>
+/// <remarks>
+/// <para>
+/// Like the steam-move detector, it only considers windows with no suspension-sized gap
+/// (controlled by <c>maxStepGapSeconds</c>), so it never overlaps the across-suspension
+/// flip / freeze detectors. It is informational (non-directional) — the score is the
+/// compression intensity, not a side prediction — so the outcome evaluator and backtest
+/// exclude it (see <c>AnomalyKind.IsDirectional</c>).
+/// </para>
+/// <para>
+/// Score scales the margin drop against a reference collapse: a drop of
+/// <see cref="ReferenceCompression"/> (10 margin points) or more reads as a full-strength
+/// signal (1.0); the configured <c>compressionThreshold</c> is the minimum drop to flag.
+/// </para>
+/// </remarks>
+public sealed class OverroundCompressionDetector : IAnomalyDetector
+{
+    /// <summary>A 10-margin-point collapse maps to the maximum score of 1.0.</summary>
+    public const decimal ReferenceCompression = 0.10m;
+
+    private readonly int _windowSeconds;
+    private readonly decimal _compressionThreshold;
+    private readonly int _minSnapshotCount;
+    private readonly int _maxStepGapSeconds;
+
+    public OverroundCompressionDetector(
+        int windowSeconds, decimal compressionThreshold, int minSnapshotCount, int maxStepGapSeconds)
+    {
+        if (windowSeconds <= 0)
+            throw new ArgumentOutOfRangeException(nameof(windowSeconds), windowSeconds, "Must be positive.");
+        if (compressionThreshold is <= 0m or >= 1m)
+            throw new ArgumentOutOfRangeException(nameof(compressionThreshold), compressionThreshold, "Must be in (0, 1).");
+        if (minSnapshotCount < 2)
+            throw new ArgumentOutOfRangeException(nameof(minSnapshotCount), minSnapshotCount, "Must be at least 2.");
+        if (maxStepGapSeconds <= 0)
+            throw new ArgumentOutOfRangeException(nameof(maxStepGapSeconds), maxStepGapSeconds, "Must be positive.");
+
+        _windowSeconds = windowSeconds;
+        _compressionThreshold = compressionThreshold;
+        _minSnapshotCount = minSnapshotCount;
+        _maxStepGapSeconds = maxStepGapSeconds;
+    }
+
+    /// <inheritdoc />
+    public IReadOnlyList<Anomaly> Detect(EventId eventId, IReadOnlyList<OddsSnapshot> snapshots)
+    {
+        ArgumentNullException.ThrowIfNull(eventId);
+        ArgumentNullException.ThrowIfNull(snapshots);
+
+        var live = snapshots
+            .Where(s => s.Source == OddsSource.Live)
+            .OrderBy(s => s.CapturedAt)
+            .ToList();
+
+        if (live.Count < _minSnapshotCount)
+            return Array.Empty<Anomaly>();
+
+        var window = TimeSpan.FromSeconds(_windowSeconds);
+        var maxStepGap = TimeSpan.FromSeconds(_maxStepGapSeconds);
+
+        var anomalies = new List<Anomaly>();
+        int windowStart = 0;
+        int continuityStart = 0;
+
+        for (int end = 1; end < live.Count; end++)
+        {
+            if (live[end].CapturedAt - live[end - 1].CapturedAt > maxStepGap)
+                continuityStart = end;
+
+            while (live[end].CapturedAt - live[windowStart].CapturedAt > window)
+                windowStart++;
+
+            int start = Math.Max(windowStart, continuityStart);
+            if (start >= end)
+                continue;
+
+            var pre = MatchWinEvidence.Extract(live[start]);
+            var post = MatchWinEvidence.Extract(live[end]);
+            if (pre is null || post is null)
+                continue;
+
+            // Compression is measured start-to-end of the current window. Because the loop
+            // emits at every `end` over a sliding window, an intra-window dip that later
+            // recovers is still flagged on the iteration whose `end` lands on the trough
+            // (where `start` still holds the pre-dip margin), so a separate peak-to-trough
+            // scan is unnecessary. Positive = the margin shrank (book tightened).
+            var compression = pre.Overround - post.Overround;
+            if (compression < _compressionThreshold)
+                continue;
+
+            var gapSeconds = (int)(live[end].CapturedAt - live[start].CapturedAt).TotalSeconds;
+            var evidenceJson = MatchWinEvidence.BuildJson(gapSeconds, live[start], pre, live[end], post);
+
+            anomalies.Add(new Anomaly(
+                Id:          Guid.NewGuid(),
+                EventId:     eventId,
+                DetectedAt:  MoscowTime.Now,
+                Kind:        AnomalyKind.OverroundCompression,
+                Score:       Math.Min(1m, compression / ReferenceCompression),
+                EvidenceJson: evidenceJson));
+        }
+
+        return anomalies.AsReadOnly();
+    }
+}

src/Marathon.Domain/AnomalyDetection/SteamMoveDetector.cs

@@ -0,0 +1,121 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Detects a "steam move": a rapid, one-directional rise in a side's normalised
+/// implied probability over a short CONTINUOUS window — money moving the line.
+/// </summary>
+/// <remarks>
+/// <para>
+/// A window is only considered when it contains no suspension-sized gap between
+/// consecutive snapshots (controlled by <c>maxStepGapSeconds</c>); drift across a
+/// suspension is the <see cref="AnomalyDetector"/>'s (SuspensionFlip) territory, so
+/// the two detectors never double-flag the same interval.
+/// </para>
+/// <para>
+/// Emits an <see cref="AnomalyKind.SteamMove"/> anomaly whose pre/post evidence
+/// brackets the drift, written in the shared <see cref="MatchWinEvidence"/> shape so
+/// the UI and <see cref="AnomalyOutcomeEvaluator"/> handle it without branching.
+/// A sustained steam may cross the threshold at several consecutive snapshots; those
+/// are collapsed to one persisted row by the detection use case's dedup window.
+/// </para>
+/// </remarks>
+public sealed class SteamMoveDetector : IAnomalyDetector
+{
+    private readonly int _windowSeconds;
+    private readonly decimal _driftThreshold;
+    private readonly int _minSnapshotCount;
+    private readonly int _maxStepGapSeconds;
+
+    /// <param name="windowSeconds">Trailing window (seconds) over which drift is measured.</param>
+    /// <param name="driftThreshold">Minimum one-directional implied-probability rise to flag; in (0, 1).</param>
+    /// <param name="minSnapshotCount">Minimum live snapshots before detection runs (>= 2).</param>
+    /// <param name="maxStepGapSeconds">
+    /// Maximum gap between consecutive snapshots for the window to count as continuous.
+    /// A larger gap means a suspension occurred — that is flip territory, not steam.
+    /// </param>
+    public SteamMoveDetector(int windowSeconds, decimal driftThreshold, int minSnapshotCount, int maxStepGapSeconds)
+    {
+        if (windowSeconds <= 0)
+            throw new ArgumentOutOfRangeException(nameof(windowSeconds), windowSeconds, "Must be positive.");
+        if (driftThreshold is <= 0m or >= 1m)
+            throw new ArgumentOutOfRangeException(nameof(driftThreshold), driftThreshold, "Must be in (0, 1).");
+        if (minSnapshotCount < 2)
+            throw new ArgumentOutOfRangeException(nameof(minSnapshotCount), minSnapshotCount, "Must be at least 2.");
+        if (maxStepGapSeconds <= 0)
+            throw new ArgumentOutOfRangeException(nameof(maxStepGapSeconds), maxStepGapSeconds, "Must be positive.");
+
+        _windowSeconds = windowSeconds;
+        _driftThreshold = driftThreshold;
+        _minSnapshotCount = minSnapshotCount;
+        _maxStepGapSeconds = maxStepGapSeconds;
+    }
+
+    /// <inheritdoc />
+    public IReadOnlyList<Anomaly> Detect(EventId eventId, IReadOnlyList<OddsSnapshot> snapshots)
+    {
+        ArgumentNullException.ThrowIfNull(eventId);
+        ArgumentNullException.ThrowIfNull(snapshots);
+
+        var live = snapshots
+            .Where(s => s.Source == OddsSource.Live)
+            .OrderBy(s => s.CapturedAt)
+            .ToList();
+
+        if (live.Count < _minSnapshotCount)
+            return Array.Empty<Anomaly>();
+
+        var window = TimeSpan.FromSeconds(_windowSeconds);
+        var maxStepGap = TimeSpan.FromSeconds(_maxStepGapSeconds);
+
+        var anomalies = new List<Anomaly>();
+        int windowStart = 0;
+        int continuityStart = 0;
+
+        for (int end = 1; end < live.Count; end++)
+        {
+            // A suspension-sized step resets continuity: the drift after it is a flip,
+            // not a steam move, so steam windows never span a suspension.
+            if (live[end].CapturedAt - live[end - 1].CapturedAt > maxStepGap)
+                continuityStart = end;
+
+            // Shrink the trailing window so [windowStart, end] is within windowSeconds.
+            while (live[end].CapturedAt - live[windowStart].CapturedAt > window)
+                windowStart++;
+
+            int start = Math.Max(windowStart, continuityStart);
+            if (start >= end)
+                continue;
+
+            var pre = MatchWinEvidence.Extract(live[start]);
+            var post = MatchWinEvidence.Extract(live[end]);
+            if (pre is null || post is null)
+                continue;
+
+            // One-directional rise: a side's normalised probability INCREASED (odds
+            // shortened) by at least the threshold — money steamed onto that side.
+            decimal drift = Math.Max(post.P1 - pre.P1, post.P2 - pre.P2);
+            if (pre.PDraw.HasValue && post.PDraw.HasValue)
+                drift = Math.Max(drift, post.PDraw.Value - pre.PDraw.Value);
+
+            if (drift < _driftThreshold)
+                continue;
+
+            var gapSeconds = (int)(live[end].CapturedAt - live[start].CapturedAt).TotalSeconds;
+            var evidenceJson = MatchWinEvidence.BuildJson(gapSeconds, live[start], pre, live[end], post);
+
+            anomalies.Add(new Anomaly(
+                Id:          Guid.NewGuid(),
+                EventId:     eventId,
+                DetectedAt:  MoscowTime.Now,
+                Kind:        AnomalyKind.SteamMove,
+                Score:       Math.Min(1m, drift),
+                EvidenceJson: evidenceJson));
+        }
+
+        return anomalies.AsReadOnly();
+    }
+}

src/Marathon.Domain/AnomalyDetection/SuspensionFreezeDetector.cs

@@ -0,0 +1,107 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// Detects a "suspension freeze": the market was suspended (a gap larger than
+/// <c>suspensionGapSeconds</c> between adjacent live snapshots) but resumed with
+/// essentially the same line — the favourite is unchanged and the largest normalised
+/// implied-probability move is below <c>freezeThreshold</c>.
+/// </summary>
+/// <remarks>
+/// <para>
+/// This is the mirror image of <see cref="AnomalyDetector"/> (SuspensionFlip): the flip
+/// fires on a large favourite-changing move across a suspension; the freeze fires when
+/// the bookmaker paused but did <i>not</i> move — a tell that they were uncertain or
+/// gathering information rather than repricing.
+/// </para>
+/// <para>
+/// Score = how completely the line froze: <c>1 − (maxMove / freezeThreshold)</c>, so a
+/// perfectly unchanged line scores ~1.0 and one near the threshold scores near 0. The
+/// shared <see cref="MatchWinEvidence"/> shape (pre ≈ post) conveys the freeze directly,
+/// and the outcome evaluator grades the unchanged favourite like any other anomaly.
+/// </para>
+/// </remarks>
+public sealed class SuspensionFreezeDetector : IAnomalyDetector
+{
+    private readonly int _suspensionGapSeconds;
+    private readonly decimal _freezeThreshold;
+    private readonly int _minSnapshotCount;
+
+    /// <param name="suspensionGapSeconds">Minimum adjacent-snapshot gap (seconds) classed as a suspension.</param>
+    /// <param name="freezeThreshold">Maximum normalised probability move to count as frozen; in (0, 1).</param>
+    /// <param name="minSnapshotCount">Minimum live snapshots before detection runs (>= 2).</param>
+    public SuspensionFreezeDetector(int suspensionGapSeconds, decimal freezeThreshold, int minSnapshotCount)
+    {
+        if (suspensionGapSeconds <= 0)
+            throw new ArgumentOutOfRangeException(nameof(suspensionGapSeconds), suspensionGapSeconds, "Must be positive.");
+        if (freezeThreshold is <= 0m or >= 1m)
+            throw new ArgumentOutOfRangeException(nameof(freezeThreshold), freezeThreshold, "Must be in (0, 1).");
+        if (minSnapshotCount < 2)
+            throw new ArgumentOutOfRangeException(nameof(minSnapshotCount), minSnapshotCount, "Must be at least 2.");
+
+        _suspensionGapSeconds = suspensionGapSeconds;
+        _freezeThreshold = freezeThreshold;
+        _minSnapshotCount = minSnapshotCount;
+    }
+
+    /// <inheritdoc />
+    public IReadOnlyList<Anomaly> Detect(EventId eventId, IReadOnlyList<OddsSnapshot> snapshots)
+    {
+        ArgumentNullException.ThrowIfNull(eventId);
+        ArgumentNullException.ThrowIfNull(snapshots);
+
+        var live = snapshots
+            .Where(s => s.Source == OddsSource.Live)
+            .OrderBy(s => s.CapturedAt)
+            .ToList();
+
+        if (live.Count < _minSnapshotCount)
+            return Array.Empty<Anomaly>();
+
+        var suspensionGap = TimeSpan.FromSeconds(_suspensionGapSeconds);
+        var anomalies = new List<Anomaly>();
+
+        for (int i = 0; i < live.Count - 1; i++)
+        {
+            var pre = live[i];
+            var post = live[i + 1];
+            if (post.CapturedAt - pre.CapturedAt <= suspensionGap)
+                continue;
+
+            var preProbs = MatchWinEvidence.Extract(pre);
+            var postProbs = MatchWinEvidence.Extract(post);
+            if (preProbs is null || postProbs is null)
+                continue;
+
+            decimal maxMove = Math.Max(
+                Math.Abs(postProbs.P1 - preProbs.P1),
+                Math.Abs(postProbs.P2 - preProbs.P2));
+            if (preProbs.PDraw.HasValue && postProbs.PDraw.HasValue)
+                maxMove = Math.Max(maxMove, Math.Abs(postProbs.PDraw.Value - preProbs.PDraw.Value));
+
+            var favouriteUnchanged =
+                MatchWinEvidence.Favourite(preProbs) == MatchWinEvidence.Favourite(postProbs);
+
+            // Strictly below the threshold so the score stays in (0, 1].
+            if (!favouriteUnchanged || maxMove >= _freezeThreshold)
+                continue;
+
+            var score = 1m - (maxMove / _freezeThreshold);
+            var gapSeconds = (int)(post.CapturedAt - pre.CapturedAt).TotalSeconds;
+            var evidenceJson = MatchWinEvidence.BuildJson(gapSeconds, pre, preProbs, post, postProbs);
+
+            anomalies.Add(new Anomaly(
+                Id:          Guid.NewGuid(),
+                EventId:     eventId,
+                DetectedAt:  MoscowTime.Now,
+                Kind:        AnomalyKind.SuspensionFreeze,
+                Score:       score,
+                EvidenceJson: evidenceJson));
+        }
+
+        return anomalies.AsReadOnly();
+    }
+}

src/Marathon.Domain/AnomalyDetection/SuspensionInterval.cs

@@ -0,0 +1,15 @@
+using Marathon.Domain.Entities;
+
+namespace Marathon.Domain.AnomalyDetection;
+
+/// <summary>
+/// A pair of adjacent <see cref="OddsSnapshot"/> records that bracket a suspension gap —
+/// i.e. the time between them exceeded the configured <c>SuspensionGapSeconds</c> threshold.
+/// </summary>
+/// <param name="PreSuspension">The last snapshot captured before the gap.</param>
+/// <param name="PostSuspension">The first snapshot captured after the gap.</param>
+internal sealed record SuspensionInterval(OddsSnapshot PreSuspension, OddsSnapshot PostSuspension)
+{
+    /// <summary>Duration of the observed suspension gap.</summary>
+    public TimeSpan Gap => PostSuspension.CapturedAt - PreSuspension.CapturedAt;
+}

src/Marathon.Domain/Backtesting/BacktestCandidate.cs

@@ -0,0 +1,24 @@
+using Marathon.Domain.AnomalyDetection;
+using Marathon.Domain.Entities;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Backtesting;
+
+/// <summary>
+/// Input row for <see cref="BacktestSimulator"/> — one anomaly fully resolved
+/// against its event metadata and result. The use case constructs these once
+/// per simulation run and feeds them to the pure simulator in chronological
+/// order.
+/// </summary>
+/// <param name="Anomaly">The flagged anomaly being simulated.</param>
+/// <param name="Evidence">
+/// Parsed evidence payload (pre- and post-suspension snapshots). The simulator
+/// reads the post-suspension favourite and rate from here.
+/// </param>
+/// <param name="Result">Final event result — drives the win/loss verdict.</param>
+/// <param name="Sport">Sport metadata, optional, surfaced into the trace row.</param>
+public sealed record BacktestCandidate(
+    Anomaly Anomaly,
+    AnomalyEvidenceData Evidence,
+    EventResult Result,
+    SportCode? Sport);

src/Marathon.Domain/Backtesting/BacktestResult.cs

@@ -0,0 +1,113 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Backtesting;
+
+/// <summary>
+/// Aggregate output of one simulation run. Contains both the headline numbers
+/// the user looks at (final bankroll, ROI, max drawdown) and the per-bet
+/// trace needed to draw an equity curve.
+/// </summary>
+/// <param name="StartingBankroll">Echoed from the strategy for the UI.</param>
+/// <param name="FinalBankroll">Bankroll after the last simulated bet settled.</param>
+/// <param name="NetProfit"><c>FinalBankroll − StartingBankroll</c>.</param>
+/// <param name="RoiPercent">
+/// <c>NetProfit / TotalStaked × 100</c>. Null when no bets were placed
+/// (no anomaly met the threshold, or the bankroll went to zero before any
+/// stake could be sized).
+/// </param>
+/// <param name="TotalStaked">Sum of stake sizes across every settled bet.</param>
+/// <param name="TotalReturned">Sum of gross returns across every settled bet.</param>
+/// <param name="MaxDrawdown">
+/// Largest peak-to-trough drop in bankroll observed during the run, as an
+/// absolute amount. Always ≥ 0.
+/// </param>
+/// <param name="MaxDrawdownPercent">
+/// <see cref="MaxDrawdown"/> as a percentage of the peak that preceded it.
+/// Null when there were no draws (no bets or no losses).
+/// </param>
+/// <param name="BetsPlaced">Total bets the strategy actually placed.</param>
+/// <param name="Wins">Settled bets whose post-flip favourite won.</param>
+/// <param name="Losses">Settled bets whose post-flip favourite lost.</param>
+/// <param name="Skipped">
+/// Total anomalies inspected but skipped. Equals
+/// <see cref="SkippedByThreshold"/> + <see cref="SkippedByDataQuality"/> +
+/// <see cref="SkippedByBankroll"/>. Surfaced separately so the UI can
+/// distinguish a strategy choice ("threshold too high") from a real-world
+/// signal ("bankroll empty") or a data-quality issue.
+/// </param>
+/// <param name="SkippedByThreshold">
+/// Skipped because <c>Anomaly.Score &lt; strategy.MinScore</c> — pure strategy choice.
+/// </param>
+/// <param name="SkippedByDataQuality">
+/// Skipped because the evidence parsed but the post-flip favourite has no
+/// rate / probability, or because a two-way market produced a Draw winner.
+/// Strategy-orthogonal — these would be skipped under any rule.
+/// </param>
+/// <param name="SkippedByBankroll">
+/// Skipped because the sized stake was non-positive (Kelly returned no edge,
+/// or bankroll was depleted) or exceeded the current bankroll.
+/// </param>
+/// <param name="MaxWinStreak">Longest run of consecutive wins.</param>
+/// <param name="MaxLossStreak">Longest run of consecutive losses.</param>
+/// <param name="Trace">
+/// Per-bet records in chronological order — drives the equity curve.
+/// </param>
+/// <param name="EventTitles">
+/// Pre-shaped <c>"Side1Name vs Side2Name"</c> strings keyed by event id, for
+/// every event in <see cref="Trace"/>. Carried alongside the result so the UI
+/// projection does not need a second pass over <c>IEventRepository</c>.
+/// Missing events (pruned by retention) are absent from the map; consumers
+/// fall back to <c>EventId.Value</c>.
+/// </param>
+public sealed record BacktestResult(
+    decimal StartingBankroll,
+    decimal FinalBankroll,
+    decimal NetProfit,
+    decimal? RoiPercent,
+    decimal TotalStaked,
+    decimal TotalReturned,
+    decimal MaxDrawdown,
+    decimal? MaxDrawdownPercent,
+    int BetsPlaced,
+    int Wins,
+    int Losses,
+    int Skipped,
+    int SkippedByThreshold,
+    int SkippedByDataQuality,
+    int SkippedByBankroll,
+    int MaxWinStreak,
+    int MaxLossStreak,
+    IReadOnlyList<BacktestTrace> Trace,
+    IReadOnlyDictionary<Marathon.Domain.ValueObjects.EventId, string> EventTitles);
+
+/// <summary>
+/// One settled simulated bet. Carries enough metadata to surface a
+/// drill-down row and a point on the equity curve.
+/// </summary>
+/// <param name="AnomalyId">Source anomaly for the link-back affordance.</param>
+/// <param name="EventId">Event being bet on.</param>
+/// <param name="DetectedAt">When the anomaly was originally detected.</param>
+/// <param name="Score">Confidence score of the anomaly.</param>
+/// <param name="Sport">Sport metadata if available — null when the event is missing.</param>
+/// <param name="PostFlipFavourite">Side bet on (the post-suspension favourite).</param>
+/// <param name="TakenRate">Rate at which the simulator "bought" the bet (post-flip rate).</param>
+/// <param name="Stake">Stake sized for this bet.</param>
+/// <param name="WinnerSide">Actual winner of the event.</param>
+/// <param name="IsWin"><c>true</c> if the post-flip favourite was the winner.</param>
+/// <param name="Payout">Gross return — <c>Stake × Rate</c> for a win, 0 for a loss.</param>
+/// <param name="BankrollAfter">Bankroll after this bet settled — equity-curve y-axis.</param>
+public sealed record BacktestTrace(
+    Guid AnomalyId,
+    EventId EventId,
+    DateTimeOffset DetectedAt,
+    decimal Score,
+    SportCode? Sport,
+    Side PostFlipFavourite,
+    decimal TakenRate,
+    decimal Stake,
+    Side WinnerSide,
+    bool IsWin,
+    decimal Payout,
+    decimal BankrollAfter);

src/Marathon.Domain/Backtesting/BacktestSimulator.cs

@@ -0,0 +1,248 @@
+using Marathon.Domain.Enums;
+
+namespace Marathon.Domain.Backtesting;
+
+/// <summary>
+/// Pure simulator that replays a <see cref="BacktestStrategy"/> over a
+/// chronological list of <see cref="BacktestCandidate"/> rows and returns the
+/// resulting <see cref="BacktestResult"/>. No I/O, no DI — safe to call in
+/// hot loops or property tests.
+/// </summary>
+/// <remarks>
+/// <para>
+/// Loop body per candidate:
+/// <list type="number">
+///   <item>Skip if <c>Anomaly.Score &lt; strategy.MinScore</c>.</item>
+///   <item>
+///     Skip if the evidence is two-way and the actual winner is <c>Draw</c>:
+///     this mirrors <c>AnomalyOutcomeEvaluator</c> — we refuse to grade
+///     selections that are structurally impossible for the market.
+///   </item>
+///   <item>Compute stake from the chosen <see cref="StakeRule"/>.</item>
+///   <item>Skip when the stake is non-positive (Kelly returned no edge, or bankroll empty).</item>
+///   <item>Settle: payout = stake × rate when the post-flip favourite won, 0 otherwise.</item>
+///   <item>Update bankroll, streaks, and running peak-to-trough drawdown.</item>
+/// </list>
+/// </para>
+/// </remarks>
+public static class BacktestSimulator
+{
+    public static BacktestResult Run(
+        BacktestStrategy strategy,
+        IReadOnlyList<BacktestCandidate> candidates,
+        IReadOnlyDictionary<Marathon.Domain.ValueObjects.EventId, string>? eventTitles = null)
+    {
+        ArgumentNullException.ThrowIfNull(strategy);
+        ArgumentNullException.ThrowIfNull(candidates);
+
+        var bankroll = strategy.StartingBankroll;
+        var peakBankroll = bankroll;
+        var maxDrawdown = 0m;
+        decimal? maxDrawdownPct = null;
+
+        var trace = new List<BacktestTrace>();
+        var totalStaked = 0m;
+        var totalReturned = 0m;
+        var wins = 0;
+        var losses = 0;
+        var skippedByThreshold = 0;
+        var skippedByDataQuality = 0;
+        var skippedByBankroll = 0;
+        var currentWinStreak = 0;
+        var currentLossStreak = 0;
+        var maxWinStreak = 0;
+        var maxLossStreak = 0;
+
+        // Process in chronological order so bankroll progression is meaningful.
+        var ordered = candidates
+            .OrderBy(c => c.Anomaly.DetectedAt)
+            .ToList();
+
+        foreach (var candidate in ordered)
+        {
+            if (candidate.Anomaly.Score < strategy.MinScore)
+            {
+                skippedByThreshold++;
+                continue;
+            }
+
+            var postFav = candidate.Evidence.PostSuspension.Favourite;
+            var isTwoWay = candidate.Evidence.PreSuspension.PDraw is null
+                        && candidate.Evidence.PostSuspension.PDraw is null;
+
+            if (isTwoWay && candidate.Result.WinnerSide == Side.Draw)
+            {
+                // Data inconsistency — refuse to grade.
+                skippedByDataQuality++;
+                continue;
+            }
+
+            var (postRate, postProb) = ExtractPostFlipRateAndProbability(candidate.Evidence, postFav);
+            if (postRate is null || postProb is null)
+            {
+                skippedByDataQuality++;
+                continue;
+            }
+
+            var stake = SizeStake(
+                strategy: strategy,
+                bankroll: bankroll,
+                postRate: postRate.Value,
+                postProb: postProb.Value);
+
+            if (stake <= 0m || stake > bankroll)
+            {
+                // Either Kelly returned no edge, or the user is broke. Either way
+                // do not place this bet.
+                skippedByBankroll++;
+                continue;
+            }
+
+            var isWin = postFav == candidate.Result.WinnerSide;
+            var payout = isWin ? stake * postRate.Value : 0m;
+
+            bankroll = bankroll - stake + payout;
+            totalStaked += stake;
+            totalReturned += payout;
+
+            if (isWin)
+            {
+                wins++;
+                currentWinStreak++;
+                currentLossStreak = 0;
+                maxWinStreak = Math.Max(maxWinStreak, currentWinStreak);
+            }
+            else
+            {
+                losses++;
+                currentLossStreak++;
+                currentWinStreak = 0;
+                maxLossStreak = Math.Max(maxLossStreak, currentLossStreak);
+            }
+
+            // Drawdown tracking: peak is the running maximum bankroll observed
+            // before the current point; drawdown is peak − current. We update
+            // peak only on new highs so the trough is measured from the right
+            // reference.
+            if (bankroll > peakBankroll)
+            {
+                peakBankroll = bankroll;
+            }
+            else
+            {
+                var dd = peakBankroll - bankroll;
+                if (dd > maxDrawdown)
+                {
+                    maxDrawdown = dd;
+                    maxDrawdownPct = peakBankroll > 0m
+                        ? Math.Round((dd / peakBankroll) * 100m, 2)
+                        : null;
+                }
+            }
+
+            // Round money columns away-from-zero so a -0.005 stake reads as "-0.01"
+            // — the convention every accountant in the world expects.
+            trace.Add(new BacktestTrace(
+                AnomalyId: candidate.Anomaly.Id,
+                EventId: candidate.Anomaly.EventId,
+                DetectedAt: candidate.Anomaly.DetectedAt,
+                Score: candidate.Anomaly.Score,
+                Sport: candidate.Sport,
+                PostFlipFavourite: postFav,
+                TakenRate: postRate.Value,
+                Stake: Math.Round(stake, 2, MidpointRounding.AwayFromZero),
+                WinnerSide: candidate.Result.WinnerSide,
+                IsWin: isWin,
+                Payout: Math.Round(payout, 2, MidpointRounding.AwayFromZero),
+                BankrollAfter: Math.Round(bankroll, 2, MidpointRounding.AwayFromZero)));
+        }
+
+        decimal? roi = totalStaked > 0m
+            ? Math.Round(((bankroll - strategy.StartingBankroll) / totalStaked) * 100m, 2,
+                MidpointRounding.AwayFromZero)
+            : null;
+
+        var totalSkipped = skippedByThreshold + skippedByDataQuality + skippedByBankroll;
+
+        return new BacktestResult(
+            StartingBankroll: strategy.StartingBankroll,
+            FinalBankroll: Math.Round(bankroll, 2, MidpointRounding.AwayFromZero),
+            NetProfit: Math.Round(bankroll - strategy.StartingBankroll, 2, MidpointRounding.AwayFromZero),
+            RoiPercent: roi,
+            TotalStaked: Math.Round(totalStaked, 2, MidpointRounding.AwayFromZero),
+            TotalReturned: Math.Round(totalReturned, 2, MidpointRounding.AwayFromZero),
+            MaxDrawdown: Math.Round(maxDrawdown, 2, MidpointRounding.AwayFromZero),
+            MaxDrawdownPercent: maxDrawdownPct,
+            BetsPlaced: trace.Count,
+            Wins: wins,
+            Losses: losses,
+            Skipped: totalSkipped,
+            SkippedByThreshold: skippedByThreshold,
+            SkippedByDataQuality: skippedByDataQuality,
+            SkippedByBankroll: skippedByBankroll,
+            MaxWinStreak: maxWinStreak,
+            MaxLossStreak: maxLossStreak,
+            Trace: trace,
+            EventTitles: eventTitles
+                ?? new Dictionary<Marathon.Domain.ValueObjects.EventId, string>());
+    }
+
+    // ── Helpers ──────────────────────────────────────────────────────────────
+
+    private static (decimal? Rate, decimal? Probability) ExtractPostFlipRateAndProbability(
+        AnomalyDetection.AnomalyEvidenceData evidence,
+        Side favourite)
+    {
+        var post = evidence.PostSuspension;
+        return favourite switch
+        {
+            Side.Side1 => (post.Rate1, post.P1),
+            Side.Side2 => (post.Rate2, post.P2),
+            Side.Draw => (post.RateDraw, post.PDraw),
+            _ => (null, null),
+        };
+    }
+
+    private static decimal SizeStake(
+        BacktestStrategy strategy,
+        decimal bankroll,
+        decimal postRate,
+        decimal postProb)
+    {
+        if (bankroll <= 0m) return 0m;
+
+        return strategy.StakeRule switch
+        {
+            StakeRule.Flat => strategy.FlatStake,
+            StakeRule.PercentOfBankroll => bankroll * strategy.PercentOfBankroll,
+            StakeRule.Kelly => ComputeKellyStake(
+                bankroll: bankroll,
+                postRate: postRate,
+                postProb: postProb,
+                fraction: strategy.KellyFraction),
+            _ => 0m,
+        };
+    }
+
+    private static decimal ComputeKellyStake(
+        decimal bankroll,
+        decimal postRate,
+        decimal postProb,
+        decimal fraction)
+    {
+        // Kelly: f* = (b·p − q) / b where b = rate − 1, p = win prob, q = 1 − p.
+        // Skip non-positive edge (no bet rather than betting "negative size").
+        var b = postRate - 1m;
+        if (b <= 0m) return 0m;
+
+        var p = postProb;
+        var q = 1m - p;
+        var fullKelly = ((b * p) - q) / b;
+
+        if (fullKelly <= 0m) return 0m;
+
+        // Quarter / half / etc.-Kelly: scale full edge by the configured fraction.
+        var stakeFraction = fullKelly * fraction;
+        return bankroll * stakeFraction;
+    }
+}

src/Marathon.Domain/Backtesting/BacktestStrategy.cs

@@ -0,0 +1,72 @@
+namespace Marathon.Domain.Backtesting;
+
+/// <summary>
+/// Parameters fed to <see cref="BacktestSimulator"/>. The strategy is "for every
+/// SuspensionFlip anomaly with score ≥ <see cref="MinScore"/>, stake
+/// according to <see cref="StakeRule"/> on the post-flip favourite at the
+/// post-flip rate, then settle against the actual <c>EventResult</c>."
+/// </summary>
+/// <param name="StartingBankroll">
+/// Initial bankroll for compounding stake rules. Must be positive.
+/// </param>
+/// <param name="MinScore">
+/// Lower bound on <c>Anomaly.Score</c> — only anomalies at or above this
+/// threshold are bet on. Must be in [0, 1].
+/// </param>
+/// <param name="StakeRule">How to size each bet — see the enum docs.</param>
+/// <param name="FlatStake">
+/// Used when <see cref="StakeRule"/> is <see cref="Backtesting.StakeRule.Flat"/>.
+/// Must be positive.
+/// </param>
+/// <param name="PercentOfBankroll">
+/// Used when <see cref="StakeRule"/> is
+/// <see cref="Backtesting.StakeRule.PercentOfBankroll"/>. Expressed as a
+/// fraction in (0, 1]. e.g. 0.02 = 2 % of bankroll.
+/// </param>
+/// <param name="KellyFraction">
+/// Used when <see cref="StakeRule"/> is <see cref="Backtesting.StakeRule.Kelly"/>.
+/// Multiplier on the raw Kelly fraction; in (0, 1]. 0.25 (quarter-Kelly) is
+/// the conservative default.
+/// </param>
+public sealed record BacktestStrategy(
+    decimal StartingBankroll,
+    decimal MinScore,
+    StakeRule StakeRule,
+    decimal FlatStake,
+    decimal PercentOfBankroll,
+    decimal KellyFraction)
+{
+    public decimal StartingBankroll { get; } = StartingBankroll > 0m
+        ? StartingBankroll
+        : throw new ArgumentOutOfRangeException(nameof(StartingBankroll),
+            StartingBankroll, "StartingBankroll must be positive.");
+
+    public decimal MinScore { get; } = MinScore is >= 0m and <= 1m
+        ? MinScore
+        : throw new ArgumentOutOfRangeException(nameof(MinScore),
+            MinScore, "MinScore must be in [0, 1].");
+
+    public decimal FlatStake { get; } = FlatStake > 0m
+        ? FlatStake
+        : throw new ArgumentOutOfRangeException(nameof(FlatStake),
+            FlatStake, "FlatStake must be positive.");
+
+    public decimal PercentOfBankroll { get; } = PercentOfBankroll is > 0m and <= 1m
+        ? PercentOfBankroll
+        : throw new ArgumentOutOfRangeException(nameof(PercentOfBankroll),
+            PercentOfBankroll, "PercentOfBankroll must be in (0, 1].");
+
+    public decimal KellyFraction { get; } = KellyFraction is > 0m and <= 1m
+        ? KellyFraction
+        : throw new ArgumentOutOfRangeException(nameof(KellyFraction),
+            KellyFraction, "KellyFraction must be in (0, 1].");
+
+    /// <summary>Sensible defaults — flat-stake, score ≥ 0.45, ¼-Kelly waiting in the wings.</summary>
+    public static BacktestStrategy Default { get; } = new(
+        StartingBankroll: 1000m,
+        MinScore: 0.45m,
+        StakeRule: StakeRule.Flat,
+        FlatStake: 50m,
+        PercentOfBankroll: 0.02m,
+        KellyFraction: 0.25m);
+}

src/Marathon.Domain/Backtesting/SavedStrategy.cs

@@ -0,0 +1,51 @@
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Backtesting;
+
+/// <summary>
+/// A named, persisted <see cref="BacktestStrategy"/> — the user's reusable
+/// staking preset. The wrapped <see cref="Strategy"/> carries every simulation
+/// parameter (bankroll, threshold, stake rule); the date-range scope of a run
+/// is deliberately NOT stored here, since that is a per-run choice rather than
+/// a property of the strategy itself.
+/// </summary>
+/// <param name="Id">Stable identity, assigned once at creation.</param>
+/// <param name="Name">
+/// User-supplied label. Trimmed and bounded to <see cref="MaxNameLength"/>;
+/// names are unique across the store (enforced by the persistence layer).
+/// </param>
+/// <param name="Strategy">The staking configuration this preset captures.</param>
+/// <param name="CreatedAt">When the preset was first saved (Moscow time).</param>
+public sealed record SavedStrategy(
+    Guid Id,
+    string Name,
+    BacktestStrategy Strategy,
+    DateTimeOffset CreatedAt)
+{
+    /// <summary>Maximum length of a trimmed strategy name.</summary>
+    public const int MaxNameLength = 80;
+
+    public string Name { get; } = NormalizeName(Name);
+
+    /// <summary>
+    /// Builds a brand-new preset with a fresh identity and the current Moscow
+    /// timestamp. Use this for "Save"; use <c>with</c> to amend an existing one.
+    /// </summary>
+    public static SavedStrategy Create(string name, BacktestStrategy strategy)
+    {
+        ArgumentNullException.ThrowIfNull(strategy);
+        return new SavedStrategy(Guid.NewGuid(), name, strategy, MoscowTime.Now);
+    }
+
+    private static string NormalizeName(string name)
+    {
+        ArgumentNullException.ThrowIfNull(name);
+        var trimmed = name.Trim();
+        if (trimmed.Length == 0)
+            throw new ArgumentException("Strategy name must not be empty.", nameof(name));
+        if (trimmed.Length > MaxNameLength)
+            throw new ArgumentException(
+                $"Strategy name must be at most {MaxNameLength} characters.", nameof(name));
+        return trimmed;
+    }
+}

src/Marathon.Domain/Backtesting/StakeRule.cs

@@ -0,0 +1,28 @@
+namespace Marathon.Domain.Backtesting;
+
+/// <summary>
+/// How the simulator decides how much to stake on each bet during a backtest.
+/// </summary>
+public enum StakeRule
+{
+    /// <summary>
+    /// Same fixed amount every bet, independent of bankroll.
+    /// Suitable for "flat-betting" historical analysis — the simplest baseline.
+    /// </summary>
+    Flat,
+
+    /// <summary>
+    /// A fixed percentage of the current bankroll every bet. Compounds: a
+    /// winning streak grows stake size; losses shrink it. Equivalent to
+    /// proportional betting.
+    /// </summary>
+    PercentOfBankroll,
+
+    /// <summary>
+    /// Fractional Kelly using the post-flip implied probability as the edge
+    /// estimate: <c>f = ((b·p) − q) / b</c>, scaled by the configured
+    /// <see cref="BacktestStrategy.KellyFraction"/>. Negative-expectation bets
+    /// stake zero (and are skipped). Half/quarter-Kelly is the usual practice.
+    /// </summary>
+    Kelly,
+}

src/Marathon.Domain/Betting/BetOutcomeResolver.cs

@@ -0,0 +1,95 @@
+using Marathon.Domain.Entities;
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Betting;
+
+/// <summary>
+/// Pure function that grades a <see cref="Bet"/> selection against a final
+/// <see cref="EventResult"/>. Used by the bet-journal resolver to auto-settle
+/// pending wagers the moment a result lands.
+/// </summary>
+/// <remarks>
+/// <para>
+/// Grading rules:
+/// <list type="bullet">
+///   <item><c>Win</c> (Side1/Side2): selection wins iff <c>WinnerSide</c> matches the side.</item>
+///   <item><c>Draw</c>: wins iff <c>WinnerSide == Draw</c>.</item>
+///   <item><c>WinFora</c> with handicap <c>h</c> on side S: adjusted S-score
+///     = <c>S.Score + h</c>. Wins when adjusted > opponent, voids on tie, loses otherwise.</item>
+///   <item><c>Total</c> with threshold <c>t</c>: combined = <c>Side1Score + Side2Score</c>.
+///     <c>More</c> wins when combined > t, voids on equal, loses when less.
+///     <c>Less</c> is the mirror image.</item>
+/// </list>
+/// </para>
+/// <para>
+/// Returns <c>null</c> when the bet cannot be graded against this result —
+/// today only period-scope selections, because <see cref="EventResult"/> stores
+/// the full-time score only. Callers must leave such bets in
+/// <see cref="BetOutcome.Pending"/> for manual settlement.
+/// </para>
+/// </remarks>
+public static class BetOutcomeResolver
+{
+    /// <summary>
+    /// Grades <paramref name="selection"/> against <paramref name="result"/>.
+    /// Returns the resulting <see cref="BetOutcome"/> or <c>null</c> if the
+    /// bet shape cannot be auto-resolved from the available result data.
+    /// </summary>
+    public static BetOutcome? Resolve(Bet selection, EventResult result)
+    {
+        ArgumentNullException.ThrowIfNull(selection);
+        ArgumentNullException.ThrowIfNull(result);
+
+        // Period-scope bets need per-period scores which EventResult does not
+        // carry today — leave for manual grading.
+        if (selection.Scope is not MatchScope)
+            return null;
+
+        return selection.Type switch
+        {
+            BetType.Win => ResolveWin(selection.Side, result),
+            BetType.Draw => ResolveDraw(result),
+            BetType.WinFora => ResolveFora(selection.Side, selection.Value!.Value, result),
+            BetType.Total => ResolveTotal(selection.Side, selection.Value!.Value, result),
+            _ => null,
+        };
+    }
+
+    private static BetOutcome ResolveWin(Side side, EventResult result) =>
+        result.WinnerSide == side ? BetOutcome.Won : BetOutcome.Lost;
+
+    private static BetOutcome ResolveDraw(EventResult result) =>
+        result.WinnerSide == Side.Draw ? BetOutcome.Won : BetOutcome.Lost;
+
+    private static BetOutcome ResolveFora(Side side, decimal handicap, EventResult result)
+    {
+        // Adjusted score for the side that took the handicap.
+        var (own, opponent) = side == Side.Side1
+            ? (result.Side1Score, result.Side2Score)
+            : (result.Side2Score, result.Side1Score);
+
+        var adjusted = own + handicap;
+
+        if (adjusted > opponent) return BetOutcome.Won;
+        if (adjusted == opponent) return BetOutcome.Void;
+        return BetOutcome.Lost;
+    }
+
+    private static BetOutcome ResolveTotal(Side side, decimal threshold, EventResult result)
+    {
+        var total = (decimal)(result.Side1Score + result.Side2Score);
+
+        // More wins when total > threshold; Less wins when total < threshold.
+        // Equality is a push (Void) for both sides.
+        if (total == threshold) return BetOutcome.Void;
+
+        var totalIsOver = total > threshold;
+        return side switch
+        {
+            Side.More => totalIsOver ? BetOutcome.Won : BetOutcome.Lost,
+            Side.Less => totalIsOver ? BetOutcome.Lost : BetOutcome.Won,
+            _ => BetOutcome.Lost, // Defensive — Bet invariant rejects other sides for Total.
+        };
+    }
+}

src/Marathon.Domain/Betting/KellyCalculator.cs

@@ -0,0 +1,82 @@
+namespace Marathon.Domain.Betting;
+
+/// <summary>
+/// Pure fractional-Kelly stake sizing for a single back bet at decimal odds.
+/// </summary>
+/// <remarks>
+/// <para>
+/// The Kelly criterion maximises the long-run growth rate of a bankroll by staking
+/// a fraction of it proportional to the edge. For decimal odds <c>o</c> and an
+/// estimated win probability <c>p</c>, the full-Kelly fraction of bankroll is:
+/// </para>
+/// <code>f* = (p·o − 1) / (o − 1)</code>
+/// <para>
+/// When <c>f*</c> is zero or negative there is no positive expected value, and the
+/// suggested stake is <c>0</c> — the calculator never recommends betting into a
+/// negative-EV price. Most disciplined bettors stake a <i>fraction</i> of full
+/// Kelly (e.g. quarter-Kelly, <c>fraction = 0.25</c>) to cut variance and blunt the
+/// impact of probability-estimation error; full Kelly is famously over-aggressive
+/// once <c>p</c> is even slightly wrong.
+/// </para>
+/// <para>
+/// The win probability is an input the bettor supplies — it is intentionally NOT
+/// derived from an anomaly score here, so the calculator stays a pure, reusable
+/// money-management primitive independent of any signal source.
+/// </para>
+/// </remarks>
+public static class KellyCalculator
+{
+    /// <summary>Default Kelly fraction: quarter-Kelly — the conventional variance-safe choice.</summary>
+    public const decimal DefaultFraction = 0.25m;
+
+    /// <summary>
+    /// Full-Kelly fraction of bankroll <c>(p·o − 1)/(o − 1)</c>. May be negative or
+    /// zero, signalling no positive edge. Exposed for callers that want the raw
+    /// figure (e.g. to display the edge) rather than a clamped stake.
+    /// </summary>
+    /// <param name="winProbability">Estimated win probability in the closed interval [0, 1].</param>
+    /// <param name="decimalOdds">Decimal odds, strictly greater than 1.0.</param>
+    public static decimal FullKellyFraction(decimal winProbability, decimal decimalOdds)
+    {
+        if (winProbability is < 0m or > 1m)
+            throw new ArgumentOutOfRangeException(nameof(winProbability), winProbability, "Must be in [0, 1].");
+        if (decimalOdds <= 1m)
+            throw new ArgumentOutOfRangeException(nameof(decimalOdds), decimalOdds, "Decimal odds must be greater than 1.0.");
+
+        return (winProbability * decimalOdds - 1m) / (decimalOdds - 1m);
+    }
+
+    /// <summary>
+    /// Suggested stake using fractional Kelly, rounded down to two decimals so the
+    /// suggestion is never larger than the theoretical figure. Returns <c>0</c> when
+    /// there is no positive edge.
+    /// </summary>
+    /// <param name="winProbability">Estimated win probability in the open interval (0, 1).</param>
+    /// <param name="decimalOdds">Decimal odds, strictly greater than 1.0.</param>
+    /// <param name="bankroll">Total bankroll; must be non-negative.</param>
+    /// <param name="fraction">Kelly fraction in (0, 1]; defaults to <see cref="DefaultFraction"/>.</param>
+    public static decimal SuggestStake(
+        decimal winProbability,
+        decimal decimalOdds,
+        decimal bankroll,
+        decimal fraction = DefaultFraction)
+    {
+        if (winProbability is <= 0m or >= 1m)
+            throw new ArgumentOutOfRangeException(nameof(winProbability), winProbability, "Must be in the open interval (0, 1).");
+        if (bankroll < 0m)
+            throw new ArgumentOutOfRangeException(nameof(bankroll), bankroll, "Must be non-negative.");
+        if (fraction is <= 0m or > 1m)
+            throw new ArgumentOutOfRangeException(nameof(fraction), fraction, "Kelly fraction must be in (0, 1].");
+
+        // FullKellyFraction validates decimalOdds.
+        var full = FullKellyFraction(winProbability, decimalOdds);
+        if (full <= 0m)
+            return 0m;
+
+        var stake = fraction * full * bankroll;
+
+        // Truncate (floor toward zero) to two decimals so a stake suggestion never
+        // exceeds the computed figure — a conservative bias for real-money sizing.
+        return Math.Truncate(stake * 100m) / 100m;
+    }
+}

src/Marathon.Domain/Entities/Anomaly.cs

@@ -0,0 +1,37 @@
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A detected anomaly in odds behaviour for an event.
+/// <c>Score</c> is a normalised confidence score in [0, 1] — higher means stronger signal.
+/// <c>EvidenceJson</c> is a JSON string containing the raw evidence timeline (snapshots, diffs).
+/// </summary>
+public sealed record Anomaly(
+    Guid Id,
+    EventId EventId,
+    DateTimeOffset DetectedAt,
+    AnomalyKind Kind,
+    decimal Score,
+    string EvidenceJson)
+{
+    public Guid Id { get; } = Id == Guid.Empty
+        ? throw new ArgumentException("Anomaly Id must not be an empty GUID.", nameof(Id))
+        : Id;
+
+    public EventId EventId { get; } = EventId ?? throw new ArgumentNullException(nameof(EventId));
+
+    public DateTimeOffset DetectedAt { get; } = DetectedAt;
+
+    public AnomalyKind Kind { get; } = Kind;
+
+    public decimal Score { get; } = Score is >= 0m and <= 1m
+        ? Score
+        : throw new ArgumentOutOfRangeException(nameof(Score), Score,
+            "Anomaly Score must be in the range [0, 1].");
+
+    public string EvidenceJson { get; } = string.IsNullOrWhiteSpace(EvidenceJson)
+        ? throw new ArgumentException("EvidenceJson must not be empty.", nameof(EvidenceJson))
+        : EvidenceJson;
+}

src/Marathon.Domain/Entities/Bet.cs

@@ -0,0 +1,82 @@
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A single betting option within an odds snapshot.
+/// Invariants enforced in constructor:
+/// <list type="bullet">
+///   <item>Win:     Side ∈ {Side1, Side2}, Value == null</item>
+///   <item>Draw:    Side == Draw,           Value == null</item>
+///   <item>WinFora: Side ∈ {Side1, Side2}, Value != null (handicap threshold)</item>
+///   <item>Total:   Side ∈ {Less, More},   Value != null (total threshold)</item>
+/// </list>
+/// </summary>
+public sealed record Bet
+{
+    public BetScope Scope { get; }
+    public BetType Type { get; }
+    public Side Side { get; }
+    public OddsValue? Value { get; }
+    public OddsRate Rate { get; }
+
+    public Bet(BetScope scope, BetType type, Side side, OddsValue? value, OddsRate rate)
+    {
+        ArgumentNullException.ThrowIfNull(scope);
+        ArgumentNullException.ThrowIfNull(rate);
+
+        ValidateInvariants(type, side, value);
+
+        Scope = scope;
+        Type = type;
+        Side = side;
+        Value = value;
+        Rate = rate;
+    }
+
+    private static void ValidateInvariants(BetType type, Side side, OddsValue? value)
+    {
+        switch (type)
+        {
+            case BetType.Win:
+                if (side is not (Side.Side1 or Side.Side2))
+                    throw new ArgumentException(
+                        $"Win bet requires Side1 or Side2. Got: {side}.", nameof(side));
+                if (value is not null)
+                    throw new ArgumentException(
+                        "Win bet must have Value == null.", nameof(value));
+                break;
+
+            case BetType.Draw:
+                if (side != Side.Draw)
+                    throw new ArgumentException(
+                        $"Draw bet requires Side == Draw. Got: {side}.", nameof(side));
+                if (value is not null)
+                    throw new ArgumentException(
+                        "Draw bet must have Value == null.", nameof(value));
+                break;
+
+            case BetType.WinFora:
+                if (side is not (Side.Side1 or Side.Side2))
+                    throw new ArgumentException(
+                        $"WinFora bet requires Side1 or Side2. Got: {side}.", nameof(side));
+                if (value is null)
+                    throw new ArgumentException(
+                        "WinFora bet requires a non-null handicap Value.", nameof(value));
+                break;
+
+            case BetType.Total:
+                if (side is not (Side.Less or Side.More))
+                    throw new ArgumentException(
+                        $"Total bet requires Side == Less or More. Got: {side}.", nameof(side));
+                if (value is null)
+                    throw new ArgumentException(
+                        "Total bet requires a non-null threshold Value.", nameof(value));
+                break;
+
+            default:
+                throw new ArgumentOutOfRangeException(nameof(type), type, "Unknown BetType.");
+        }
+    }
+}

src/Marathon.Domain/Entities/Country.cs

@@ -0,0 +1,20 @@
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A country or geographic group associated with a league.
+/// <c>Code</c> is the bookmaker's string identifier (e.g., breadcrumb text).
+/// </summary>
+public sealed record Country(string Code, string NameRu, string NameEn)
+{
+    public string Code { get; } = string.IsNullOrWhiteSpace(Code)
+        ? throw new ArgumentException("Country Code must not be empty.", nameof(Code))
+        : Code;
+
+    public string NameRu { get; } = string.IsNullOrWhiteSpace(NameRu)
+        ? throw new ArgumentException("NameRu must not be empty.", nameof(NameRu))
+        : NameRu;
+
+    public string NameEn { get; } = string.IsNullOrWhiteSpace(NameEn)
+        ? throw new ArgumentException("NameEn must not be empty.", nameof(NameEn))
+        : NameEn;
+}

src/Marathon.Domain/Entities/Event.cs

@@ -0,0 +1,73 @@
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A sporting event that can be bet on.
+/// </summary>
+/// <remarks>
+/// <para><c>ScheduledAt</c> is stored in Europe/Moscow time (UTC+3, no DST).
+/// The offset <c>+03:00</c> is baked in — it is NOT converted to UTC.
+/// This matches <c>initData.serverTime</c> from the scraped page, which is in Moscow time.
+/// </para>
+/// </remarks>
+public sealed record Event(
+    EventId Id,
+    SportCode Sport,
+    string CountryCode,
+    string LeagueId,
+    string Category,
+    DateTimeOffset ScheduledAt,
+    string Side1Name,
+    string Side2Name)
+{
+    public EventId Id { get; } = Id ?? throw new ArgumentNullException(nameof(Id));
+
+    public SportCode Sport { get; } = Sport ?? throw new ArgumentNullException(nameof(Sport));
+
+    public string CountryCode { get; } = string.IsNullOrWhiteSpace(CountryCode)
+        ? throw new ArgumentException("CountryCode must not be empty.", nameof(CountryCode))
+        : CountryCode;
+
+    public string LeagueId { get; } = string.IsNullOrWhiteSpace(LeagueId)
+        ? throw new ArgumentException("LeagueId must not be empty.", nameof(LeagueId))
+        : LeagueId;
+
+    public string Category { get; } = Category ?? string.Empty;
+
+    public DateTimeOffset ScheduledAt { get; } = ScheduledAt.Offset == MoscowTime.Offset
+        ? ScheduledAt
+        : throw new ArgumentException(
+            $"ScheduledAt must be in Europe/Moscow time (UTC+03:00). " +
+            $"Received offset: {ScheduledAt.Offset:hh\\:mm}. " +
+            "Convert to Moscow time before constructing the Event.",
+            nameof(ScheduledAt));
+
+    public string Side1Name { get; } = string.IsNullOrWhiteSpace(Side1Name)
+        ? throw new ArgumentException("Side1Name must not be empty.", nameof(Side1Name))
+        : Side1Name;
+
+    public string Side2Name { get; } = string.IsNullOrWhiteSpace(Side2Name)
+        ? throw new ArgumentException("Side2Name must not be empty.", nameof(Side2Name))
+        : Side2Name;
+
+    /// <summary>
+    /// Bookmaker URL fragment used to fetch event-detail markets, sourced from the
+    /// listing page's <c>data-event-path</c> attribute (e.g.
+    /// <c>"Football/Clubs.+International/UEFA+Champions+League/.../Arsenal+vs+Chelsea+-+28089645"</c>).
+    /// Combined with <c>/su/betting/</c> by the scraper.
+    /// </summary>
+    /// <remarks>
+    /// Optional for backward compatibility with rows persisted before the column
+    /// was introduced. When null, the scraper falls back to the (less reliable)
+    /// numeric event ID.
+    /// </remarks>
+    public string? EventPath { get; init; }
+
+    /// <summary>
+    /// Display title in the canonical "{Side1Name} vs {Side2Name}" form. Single
+    /// source for the home-vs-away join that was previously duplicated across the
+    /// report use cases and list/feed services.
+    /// </summary>
+    public string Title => $"{Side1Name} vs {Side2Name}";
+}

src/Marathon.Domain/Entities/EventResult.cs

@@ -0,0 +1,32 @@
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// The final result of a sporting event after it has completed.
+/// </summary>
+public sealed record EventResult(
+    EventId EventId,
+    int Side1Score,
+    int Side2Score,
+    Side WinnerSide,
+    DateTimeOffset CompletedAt)
+{
+    public EventId EventId { get; } = EventId ?? throw new ArgumentNullException(nameof(EventId));
+
+    public int Side1Score { get; } = Side1Score >= 0
+        ? Side1Score
+        : throw new ArgumentOutOfRangeException(nameof(Side1Score), "Score must be non-negative.");
+
+    public int Side2Score { get; } = Side2Score >= 0
+        ? Side2Score
+        : throw new ArgumentOutOfRangeException(nameof(Side2Score), "Score must be non-negative.");
+
+    public Side WinnerSide { get; } = WinnerSide is Side.Side1 or Side.Side2 or Side.Draw
+        ? WinnerSide
+        : throw new ArgumentException(
+            $"WinnerSide must be Side1, Side2, or Draw. Got: {WinnerSide}.", nameof(WinnerSide));
+
+    public DateTimeOffset CompletedAt { get; } = CompletedAt;
+}

src/Marathon.Domain/Entities/League.cs

@@ -0,0 +1,35 @@
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A sports league or tournament within a country and sport.
+/// </summary>
+public sealed record League(
+    string Id,
+    SportCode Sport,
+    string Country,
+    string NameRu,
+    string NameEn,
+    string Category)
+{
+    public string Id { get; } = string.IsNullOrWhiteSpace(Id)
+        ? throw new ArgumentException("League Id must not be empty.", nameof(Id))
+        : Id;
+
+    public SportCode Sport { get; } = Sport ?? throw new ArgumentNullException(nameof(Sport));
+
+    public string Country { get; } = string.IsNullOrWhiteSpace(Country)
+        ? throw new ArgumentException("Country must not be empty.", nameof(Country))
+        : Country;
+
+    public string NameRu { get; } = string.IsNullOrWhiteSpace(NameRu)
+        ? throw new ArgumentException("NameRu must not be empty.", nameof(NameRu))
+        : NameRu;
+
+    public string NameEn { get; } = string.IsNullOrWhiteSpace(NameEn)
+        ? throw new ArgumentException("NameEn must not be empty.", nameof(NameEn))
+        : NameEn;
+
+    public string Category { get; } = Category ?? string.Empty;
+}

src/Marathon.Domain/Entities/OddsSnapshot.cs

@@ -0,0 +1,34 @@
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A point-in-time capture of all odds for a specific event.
+/// </summary>
+public sealed record OddsSnapshot
+{
+    public EventId EventId { get; }
+    public DateTimeOffset CapturedAt { get; }
+    public OddsSource Source { get; }
+    public IReadOnlyList<Bet> Bets { get; }
+
+    public OddsSnapshot(
+        EventId eventId,
+        DateTimeOffset capturedAt,
+        OddsSource source,
+        IReadOnlyList<Bet> bets)
+    {
+        ArgumentNullException.ThrowIfNull(eventId);
+        ArgumentNullException.ThrowIfNull(bets);
+
+        if (bets.Count == 0)
+            throw new ArgumentException(
+                "OddsSnapshot must contain at least one Bet.", nameof(bets));
+
+        EventId = eventId;
+        CapturedAt = capturedAt;
+        Source = source;
+        Bets = bets;
+    }
+}

src/Marathon.Domain/Entities/PaperBet.cs

@@ -0,0 +1,72 @@
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A hypothetical "paper" wager opened automatically by the forward-test worker the
+/// moment a directional anomaly fires, then settled when the event result arrives.
+/// </summary>
+/// <remarks>
+/// Unlike <see cref="PlacedBet"/> (the user's real journal), a paper bet is
+/// system-generated and exists only to measure the detector's live, out-of-sample
+/// edge — the antidote to backtest overfitting. Exactly one paper bet is opened per
+/// anomaly (enforced by a unique index on <see cref="AnomalyId"/>).
+/// </remarks>
+public sealed record PaperBet(
+    Guid Id,
+    Guid AnomalyId,
+    EventId EventId,
+    Side PickedSide,
+    decimal Rate,
+    decimal Stake,
+    DateTimeOffset OpenedAt,
+    BetOutcome Outcome,
+    DateTimeOffset? SettledAt,
+    decimal? Payout)
+{
+    public decimal Rate { get; } = Rate > 1m
+        ? Rate
+        : throw new ArgumentOutOfRangeException(nameof(Rate), Rate, "Decimal odds must be greater than 1.");
+
+    public decimal Stake { get; } = Stake > 0m
+        ? Stake
+        : throw new ArgumentOutOfRangeException(nameof(Stake), Stake, "Stake must be positive.");
+
+    /// <summary>Whether the bet is still awaiting a result.</summary>
+    public bool IsOpen => Outcome == BetOutcome.Pending;
+
+    /// <summary>Opens a fresh, unsettled paper bet with a new identity.</summary>
+    public static PaperBet Open(
+        Guid anomalyId, EventId eventId, Side pickedSide, decimal rate, decimal stake, DateTimeOffset openedAt)
+    {
+        ArgumentNullException.ThrowIfNull(eventId);
+        return new PaperBet(
+            Id: Guid.NewGuid(),
+            AnomalyId: anomalyId,
+            EventId: eventId,
+            PickedSide: pickedSide,
+            Rate: rate,
+            Stake: stake,
+            OpenedAt: openedAt,
+            Outcome: BetOutcome.Pending,
+            SettledAt: null,
+            Payout: null);
+    }
+
+    /// <summary>
+    /// Settles the bet against the actual winner: Won (payout = stake × rate) when
+    /// <paramref name="winnerSide"/> equals <see cref="PickedSide"/>, otherwise Lost
+    /// (payout 0). A win-market pick that draws simply loses.
+    /// </summary>
+    public PaperBet SettleAgainst(Side winnerSide, DateTimeOffset settledAt)
+    {
+        var won = winnerSide == PickedSide;
+        return this with
+        {
+            Outcome = won ? BetOutcome.Won : BetOutcome.Lost,
+            SettledAt = settledAt,
+            Payout = won ? Stake * Rate : 0m,
+        };
+    }
+}

src/Marathon.Domain/Entities/PlacedBet.cs

@@ -0,0 +1,89 @@
+using Marathon.Domain.Enums;
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A wager the user manually recorded as having placed (with this or another
+/// bookmaker). Reuses the <see cref="Bet"/> vocabulary so the journal can mirror
+/// scraped markets directly — same Scope / Type / Side / Value / Rate invariants
+/// apply to <see cref="Selection"/>.
+/// </summary>
+/// <param name="Id">Stable identifier — Guid so duplicates can be detected by the UI.</param>
+/// <param name="EventId">Event the wager is on.</param>
+/// <param name="Selection">
+/// The market + rate the user took. <c>Selection.Rate</c> is the "taken rate"
+/// used for ROI and CLV calculations.
+/// </param>
+/// <param name="Stake">
+/// Money risked, in the user's currency. The domain does not encode currency —
+/// stake values are compared as raw decimals.
+/// </param>
+/// <param name="PlacedAt">When the bet was recorded. Stored as Moscow time.</param>
+/// <param name="Outcome">Current settlement state — see <see cref="BetOutcome"/>.</param>
+/// <param name="Notes">Optional free text — strategy tag, source, etc.</param>
+public sealed record PlacedBet(
+    Guid Id,
+    EventId EventId,
+    Bet Selection,
+    decimal Stake,
+    DateTimeOffset PlacedAt,
+    BetOutcome Outcome,
+    string? Notes)
+{
+    public Guid Id { get; } = Id == Guid.Empty
+        ? throw new ArgumentException("PlacedBet Id must not be an empty GUID.", nameof(Id))
+        : Id;
+
+    public EventId EventId { get; } = EventId ?? throw new ArgumentNullException(nameof(EventId));
+
+    public Bet Selection { get; } = Selection ?? throw new ArgumentNullException(nameof(Selection));
+
+    public decimal Stake { get; } = Stake > 0m
+        ? Stake
+        : throw new ArgumentOutOfRangeException(nameof(Stake), Stake,
+            "Stake must be positive.");
+
+    public DateTimeOffset PlacedAt { get; } = PlacedAt.Offset == MoscowTime.Offset
+        ? PlacedAt
+        : throw new ArgumentException(
+            $"PlacedAt must be in Europe/Moscow time (UTC+03:00). " +
+            $"Received offset: {PlacedAt.Offset:hh\\:mm}.",
+            nameof(PlacedAt));
+
+    public BetOutcome Outcome { get; } = Outcome;
+
+    public string? Notes { get; } = string.IsNullOrWhiteSpace(Notes) ? null : Notes;
+
+    /// <summary>
+    /// Gross return on this bet for the current outcome — the amount the
+    /// bookmaker pays back to the user (stake + winnings).
+    /// <list type="bullet">
+    ///   <item><see cref="BetOutcome.Won"/>: <c>Stake × Rate</c></item>
+    ///   <item><see cref="BetOutcome.Void"/>: <c>Stake</c> (push — stake returned)</item>
+    ///   <item><see cref="BetOutcome.Lost"/>: <c>0</c></item>
+    ///   <item><see cref="BetOutcome.Pending"/>: <c>null</c> (unknown)</item>
+    /// </list>
+    /// </summary>
+    public decimal? GrossReturn => Outcome switch
+    {
+        BetOutcome.Won => Stake * Selection.Rate.Value,
+        BetOutcome.Void => Stake,
+        BetOutcome.Lost => 0m,
+        _ => null,
+    };
+
+    /// <summary>
+    /// Net profit for the current outcome — <see cref="GrossReturn"/> minus
+    /// <see cref="Stake"/>. Negative for losses. Null while pending.
+    /// </summary>
+    public decimal? NetProfit => GrossReturn is null ? null : GrossReturn.Value - Stake;
+
+    /// <summary>
+    /// Returns a copy with a new <see cref="Outcome"/> — used by the resolver
+    /// use case after grading the event. Constructs explicitly because the
+    /// manual validating <c>get</c>-only properties prevent <c>with</c>.
+    /// </summary>
+    public PlacedBet WithOutcome(BetOutcome outcome) =>
+        new(Id, EventId, Selection, Stake, PlacedAt, outcome, Notes);
+}

src/Marathon.Domain/Entities/Sport.cs

@@ -0,0 +1,19 @@
+using Marathon.Domain.ValueObjects;
+
+namespace Marathon.Domain.Entities;
+
+/// <summary>
+/// A sport supported by the bookmaker.
+/// </summary>
+public sealed record Sport(SportCode Code, string NameRu, string NameEn)
+{
+    public SportCode Code { get; } = Code ?? throw new ArgumentNullException(nameof(Code));
+
+    public string NameRu { get; } = string.IsNullOrWhiteSpace(NameRu)
+        ? throw new ArgumentException("NameRu must not be empty.", nameof(NameRu))
+        : NameRu;
+
+    public string NameEn { get; } = string.IsNullOrWhiteSpace(NameEn)
+        ? throw new ArgumentException("NameEn must not be empty.", nameof(NameEn))
+        : NameEn;
+}

src/Marathon.Domain/Enums/AnomalyKind.cs

@@ -0,0 +1,31 @@
+namespace Marathon.Domain.Enums;
+
+/// <summary>
+/// The category of a detected anomaly.
+/// Extensible — new kinds will be added in future phases.
+/// </summary>
+public enum AnomalyKind
+{
+    /// <summary>
+    /// Bookmaker suspended the market, then flipped the underdog/favourite coefficients.
+    /// </summary>
+    SuspensionFlip,
+
+    /// <summary>
+    /// A rapid, one-directional drift in a side's implied probability over a short
+    /// continuous window (no suspension) — money moving the line ("steam").
+    /// </summary>
+    SteamMove,
+
+    /// <summary>
+    /// The bookmaker suspended the market but resumed with essentially the same line
+    /// (favourite unchanged, negligible price move) — a freeze signalling uncertainty.
+    /// </summary>
+    SuspensionFreeze,
+
+    /// <summary>
+    /// The bookmaker's margin (overround) compressed sharply over a short continuous
+    /// window — the book tightened its vig, often ahead of news or when confident.
+    /// </summary>
+    OverroundCompression,
+}

src/Marathon.Domain/Enums/AnomalyKindExtensions.cs

@@ -0,0 +1,25 @@
+namespace Marathon.Domain.Enums;
+
+/// <summary>Semantic classification of anomaly kinds.</summary>
+public static class AnomalyKindExtensions
+{
+    /// <summary>
+    /// Whether the kind makes a <i>directional</i> prediction — a specific side/favourite
+    /// expected to win — that can be graded against the result and bet on in a backtest.
+    /// </summary>
+    /// <remarks>
+    /// <see cref="AnomalyKind.SuspensionFlip"/> and <see cref="AnomalyKind.SteamMove"/> are
+    /// directional (they point at a favourite). <see cref="AnomalyKind.SuspensionFreeze"/> is
+    /// informational — the line did NOT move — so "predicting" the unchanged favourite would
+    /// merely measure the base favourite-win rate; it is excluded from outcome grading and
+    /// from backtest staking so it does not distort detector calibration.
+    /// </remarks>
+    public static bool IsDirectional(this AnomalyKind kind) => kind switch
+    {
+        AnomalyKind.SuspensionFlip => true,
+        AnomalyKind.SteamMove => true,
+        AnomalyKind.SuspensionFreeze => false,
+        AnomalyKind.OverroundCompression => false,
+        _ => false,
+    };
+}