Project Index Generate project context and codebase documentation for AI agents. Triggers - One-time setup ("initialize", "setup project index", "index project") → initialize.md - Project context ("overview", "project context", "refresh project") → overview.md - Codebase summary ("map codebase", "analyze codebase", "summary") → dispatch the 6 codebase refs in parallel via sub-agent fan-out, then run review.md with the outputs as context - Incremental refresh ("refresh codebase", "sync codebase", "patch index") → refresh.md - Architecture (single doc refresh) → architecture.md - Conventions (s…