olegakbarov

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.

Implement or debug the CodexMonitor remote backend daemon and client using the JSON-over-TCP, line-delimited JSON-RPC-ish protocol. Use when building the TypeScript/Node.js daemon, wiring Codex app-server proxy methods, auth handshake, workspace/worktree management, or the matching client.

Build local-first apps with ElectricSQL (HTTP Postgres sync) and TanStack DB. Use when wiring Electric shapes and proxy routes, configuring electricCollectionOptions, implementing optimistic mutations with txid handshake, or troubleshooting live queries, security, and deployment.

Build and integrate json-render (json-render.dev) for AI generated UIs with guardrails in React. Use when implementing or troubleshooting catalogs, component registries, renderers, data binding, actions, visibility, validation, streaming (JSONL + useUIStream), AI SDK integration, or code export and codegen for json-render.

Build, integrate, and troubleshoot xmcp-based MCP servers and adapters. Use when creating MCP tools/prompts/resources, bootstrapping with init-xmcp, wiring /mcp endpoints in Next.js/Express/NestJS, configuring auth/middleware, or debugging build/dev and adapter output.

Load when working inside a Weekend project (path under ~/.weekend/<project>/) — touching weekend.config.json, importing from @weekend/design, building UI, testing the running app, or reading ./shared-assets/. Triggers on portless runtime, Weekend MCP, theme tokens, four-theme support, "use the design system", "test in the browser pane".