Brief description of the change.

• New skill
• New rule
• New MCP tool
• Bug fix
• Documentation update
• CI/CD change
• Other

• YAML frontmatter is valid (skills: name + description; rules: description + alwaysApply)
• Tested locally (plugin loads, MCP server builds, tests pass)
• Plugin structure tests pass (pytest tests/ -v)
• MCP server tests pass (cd mcp-server && npm test)
• Updated CHANGELOG.md
• No hardcoded credentials or secrets
• No em dashes used