alexei.dolgolyov
6a6c8b2c52
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- Replace winsdk (~35MB) with winrt packages (~2.5MB) for OS notification listener. API is identical, 93% size reduction. - Replace wmi (~3-5MB) with ctypes for monitor names (EnumDisplayDevicesW) and camera names (SetupAPI). Zero external dependency. - Migrate cv2.resize/imencode/LUT to Pillow/numpy in 5 files (filters, preview helpers, kc_target_processor). OpenCV only needed for camera and video stream now. - Fix DefWindowProcW ctypes overflow on 64-bit Python (pre-existing bug in platform_detector display power listener). - Fix openLightbox import in streams-capture-templates.ts (was using broken window cast instead of direct import). - Add mandatory data migration policy to CLAUDE.md after silent data loss incident from storage file rename without migration.
72 lines
4.4 KiB
Markdown
72 lines
4.4 KiB
Markdown
# Claude Instructions for WLED Screen Controller
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## Code Search
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**If `ast-index` is available, use it as the PRIMARY code search tool.** It is significantly faster than grep and returns structured, accurate results. Fall back to grep/Glob only when ast-index is not installed, returns empty results, or when searching regex patterns/string literals/comments.
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**IMPORTANT for subagents:** When spawning Agent subagents (Plan, Explore, general-purpose, etc.), always instruct them to use `ast-index` via Bash for code search instead of grep/Glob. Example: include "Use `ast-index search`, `ast-index class`, `ast-index usages` etc. via Bash for code search" in the agent prompt.
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```bash
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ast-index search "Query" # Universal search
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ast-index class "ClassName" # Find class/struct/interface definitions
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ast-index usages "SymbolName" # Find all usage sites
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ast-index symbol "FunctionName" # Find any symbol
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ast-index callers "FunctionName" # Find all call sites
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ast-index outline "path/to/File.py" # Show all symbols in a file
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ast-index changed --base master # Show symbols changed in current branch
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```
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## Git Commit and Push Policy
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**NEVER commit or push without explicit user approval.** Wait for the user to review changes and explicitly say "commit" or "push". Completing a task, "looks good", or "thanks" do NOT count as approval. See the system-level instructions for the full commit workflow.
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## Auto-Restart and Rebuild Policy
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- **Python code changes** (`server/src/` excluding `static/`): Auto-restart the server. See [contexts/server-operations.md](contexts/server-operations.md) for the restart procedure.
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- **Frontend changes** (`static/js/`, `static/css/`): Run `cd server && npm run build` to rebuild the bundle. No server restart needed.
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## Project Structure
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- `/server` — Python FastAPI backend (see [server/CLAUDE.md](server/CLAUDE.md))
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- `/contexts` — Context files for Claude (frontend conventions, graph editor, Chrome tools, server ops, demo mode)
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## Context Files
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| File | When to read |
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| ---- | ------------ |
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| [contexts/frontend.md](contexts/frontend.md) | HTML, CSS, JS/TS, i18n, modals, icons, bundling |
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| [contexts/graph-editor.md](contexts/graph-editor.md) | Visual graph editor changes |
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| [contexts/server-operations.md](contexts/server-operations.md) | Server restart, startup modes, demo mode |
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| [contexts/chrome-tools.md](contexts/chrome-tools.md) | Chrome MCP tool usage for testing |
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| [server/CLAUDE.md](server/CLAUDE.md) | Backend architecture, API patterns, common tasks |
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## Task Tracking via TODO.md
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Use `TODO.md` in the project root as the primary task tracker. **Do NOT use the TodoWrite tool** — all progress tracking goes through `TODO.md`.
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## Documentation Lookup
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**Use context7 MCP tools for library/framework documentation lookups** (FastAPI, OpenCV, Pydantic, yt-dlp, etc.) instead of relying on potentially outdated training data.
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## Data Migration Policy (CRITICAL)
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**NEVER rename a storage file path, store key, entity ID prefix, or JSON field name without writing a migration.** User data lives in JSON files under `data/`. If the code starts reading from a new filename while the old file still has user data, THAT DATA IS SILENTLY LOST.
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When renaming any storage-related identifier:
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1. **Add migration logic in `BaseJsonStore.__init__`** (or the specific store) that detects the old file/key and migrates data to the new name automatically on startup
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2. **Log a clear warning** when migration happens so the user knows
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3. **Keep the old file as a backup** after migration (rename to `.migrated` or similar)
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4. **Test the migration** with both old-format and new-format data files
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5. **Document the migration** in the commit message
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This applies to: file paths in `StorageConfig`, JSON root keys (e.g. `picture_targets` → `output_targets`), entity ID prefixes (e.g. `pt_` → `ot_`), and any field renames in dataclass models.
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**Incident context:** A past rename of `picture_targets.json` → `output_targets.json` was done without migration. The app created a new empty `output_targets.json` while the user's 7 targets sat unread in the old file. Data was silently lost.
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## General Guidelines
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- Always test changes before marking as complete
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- Follow existing code style and patterns
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- Update documentation when changing behavior
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- Never make commits or pushes without explicit user approval
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