Expert guidance for TanStack DB reactive client-side database with collections, live queries, optimistic mutations, and sync engines (ElectricSQL, RxDB, PowerSync). Use when user says "tanstack db", "/tanstack-db", "local-first", "live query", "collection", "optimistic mutation", "electric", "sync engine", or asks about reactive data, offline-first, or real-time sync.
Expert guidance for tRPC v11 type-safe APIs, procedures, middleware, error handling, and TanStack Query integration. Use when user says "trpc", "/trpc", "create procedure", "add endpoint", "api route", "mutation", "query", "middleware", or asks about type-safe APIs, routers, or server/client setup.
Expert guidance for TanStack Router file-based routing, loaders, actions, type-safe navigation, and React patterns. Use when user says "tanstack router", "/tanstack-router", "create route", "add page", "routing help", "loader", "route params", or asks about navigation, layouts, or route structure.
Maps and documents codebases of any size by orchestrating parallel subagents. Creates docs/CODEBASE_MAP.md with architecture, file purposes, dependencies, and navigation guides. Updates CLAUDE.md with a summary. Use when user says "map this codebase", "cartographer", "/cartographer", "create codebase map", "document the architecture", "understand this codebase", or when onboarding to a new project. Automatically detects if map exists and updates only changed sections.