Project knowledge base and workflow router. knowledge/ caches explored file locations, module boundaries, and call chains for reuse; decisions/maxims are established architecture decisions and coding standards to follow, not relitigate; pipelines are reusable workflows; short-term/ stages new conclusions until promotion or deletion. Use self-improve after completing work to capture new insights. Provides seven tools: init, upgrade, migrate, doctor, self-improve, refine, and sync-instructions.