# Claude Code Tools & Extensions

Useful tools, plugins, and extensions for Claude Code.

## MCP Servers

MCP (Model Context Protocol) servers are external processes that provide tools to Claude Code via a standardized protocol. They run alongside your session and extend Claude's capabilities.

### Context7

Up-to-date documentation and code examples for any library, available directly in your Claude Code session.

- **Website:** <https://context7.com/>
- **Setup:**

  ```bash
  claude mcp add --scope user --transport http context7 https://mcp.context7.com/mcp --header "CONTEXT7_API_KEY: <YOUR_API_KEY>"
  ```

- **Note:** API key can be created for free after signing in at [context7.com](https://context7.com/)

## Skills (Slash Commands)

Skills are a different extension mechanism from MCPs. They are prompt-based extensions invoked via `/skill-name` commands directly within Claude Code — no external server required.

### Installing `.skill` packages

Skills are distributed as `.skill` files (ZIP archives containing a `SKILL.md` and optional scripts).

**Option 1 — CLI** (if `claude` command is available):

```bash
claude skill install --scope user my-skill.skill
```

**Option 2 — Manual extraction** (works everywhere, including VS Code extension):

```bash
# Python one-liner
python -c "import zipfile; zipfile.ZipFile('my-skill.skill').extractall('$HOME/.claude/skills')"
```

Skills are extracted into `~/.claude/skills/<skill-name>/`. They become available in the next Claude Code session.

### AST Index

Fast code search skill for Claude Code — find classes, symbols, usages, implementations, and more across large codebases using AST parsing.

- **Repository:** <https://github.com/defendend/Claude-ast-index-search>
- **Usage:** Invoke with `/ast-index` or related commands like "find class", "search for symbol", etc.

### Packaged Skills

Packaged `.skill` files available in the [skills/](skills/) directory:

- **dolgolyov-dev-facts** — Sync local project configuration with the central claude-code-facts knowledge base.
- **dolgolyov-git-release-publisher** — Generate release notes and push release tags for repos hosted on Gitea or GitHub.
- **feature-planner** — Plan and develop complex features using a structured, phase-based workflow with git integration, Markdown plans, review gates, and controlled merging.

## Toolkits

### Everything Claude Code (ECC)

A comprehensive collection of skills, rules, agents, and hooks for Claude Code.

- **Repository:** <https://github.com/affaan-m/everything-claude-code>
- **Setup guide:** [ecc-setup-guide.md](ecc-setup-guide.md)