docs: Add /release-docs command, changelog page, and build instructions

- Add /release-docs command for regenerating documentation site
- Add commands/README.md with usage instructions for all commands
- Add changelog.html page rendering CHANGELOG.md in HTML format
- Add changelog CSS styles to docs.css
- Update navigation in all docs pages to include changelog link
- Fix command count from 16 to 13 in navigation
- Update CLAUDE.md with:
  - Documentation Site section explaining structure
  - /release-docs command in update checklist
  - Instructions for keeping docs up-to-date

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -12,9 +12,15 @@ every-marketplace/
     └── compounding-engineering/   # The actual plugin
         ├── .claude-plugin/
         │   └── plugin.json        # Plugin metadata
-        ├── agents/                # 17 specialized AI agents
-        ├── commands/              # 6 slash commands
-        ├── skills/                # 1 skill (gemini-imagegen)
+        ├── agents/                # 24 specialized AI agents
+        ├── commands/              # 13 slash commands (including /release-docs)
+        ├── skills/                # 11 skills
+        ├── mcp-servers/           # 2 MCP servers (playwright, context7)
+        ├── docs/                  # Documentation site (static HTML/CSS/JS)
+        │   ├── index.html         # Landing page
+        │   ├── css/               # Stylesheets (style.css, docs.css)
+        │   ├── js/                # JavaScript (main.js)
+        │   └── pages/             # Reference pages (agents, commands, skills, mcp-servers)
         ├── README.md              # Plugin documentation
         └── CHANGELOG.md           # Version history
 ```
@@ -86,7 +92,21 @@ When adding new functionality, bump the version in:
 - [ ] `plugins/compounding-engineering/CHANGELOG.md` → document changes
 - [ ] `CLAUDE.md` → update structure diagram if needed
 
-#### 5. Validate JSON files
+#### 5. Rebuild documentation site
+
+Run the release-docs command to update all documentation pages:
+
+```bash
+claude /release-docs
+```
+
+This will:
+- Update stats on the landing page
+- Regenerate reference pages (agents, commands, skills, MCP servers)
+- Update the changelog page
+- Validate all counts match actual files
+
+#### 6. Validate JSON files
 
 ```bash
 cat .claude-plugin/marketplace.json | jq .
@@ -167,6 +187,73 @@ Each plugin has its own plugin.json with detailed metadata:
 }
 ```
 
+## Documentation Site
+
+The plugin includes a static documentation site at `plugins/compounding-engineering/docs/`. This site is built with plain HTML/CSS/JS (based on Evil Martians' LaunchKit template) and requires no build step to view.
+
+### Documentation Structure
+
+```
+docs/
+├── index.html           # Landing page with stats and philosophy
+├── css/
+│   ├── style.css        # Main styles (LaunchKit-based)
+│   └── docs.css         # Documentation-specific styles
+├── js/
+│   └── main.js          # Interactivity (theme toggle, mobile nav)
+└── pages/
+    ├── getting-started.html  # Installation and quick start
+    ├── agents.html           # All 24 agents reference
+    ├── commands.html         # All 13 commands reference
+    ├── skills.html           # All 11 skills reference
+    ├── mcp-servers.html      # MCP servers reference
+    └── changelog.html        # Version history
+```
+
+### Keeping Docs Up-to-Date
+
+**IMPORTANT:** After ANY change to agents, commands, skills, or MCP servers, run:
+
+```bash
+claude /release-docs
+```
+
+This command:
+1. Counts all current components
+2. Reads all agent/command/skill/MCP files
+3. Regenerates all reference pages
+4. Updates stats on the landing page
+5. Updates the changelog from CHANGELOG.md
+6. Validates counts match across all files
+
+### Manual Updates
+
+If you need to update docs manually:
+
+1. **Landing page stats** - Update the numbers in `docs/index.html`:
+   ```html
+   <span class="stat-number">24</span>  <!-- agents -->
+   <span class="stat-number">13</span>  <!-- commands -->
+   ```
+
+2. **Reference pages** - Each page in `docs/pages/` documents all components in that category
+
+3. **Changelog** - `docs/pages/changelog.html` mirrors `CHANGELOG.md` in HTML format
+
+### Viewing Docs Locally
+
+Since the docs are static HTML, you can view them directly:
+
+```bash
+# Open in browser
+open plugins/compounding-engineering/docs/index.html
+
+# Or start a local server
+cd plugins/compounding-engineering/docs
+python -m http.server 8000
+# Then visit http://localhost:8000
+```
+
 ## Testing Changes
 
 ### Test Locally