MCP Spec Assistant

Answers questions on LangChain and LangGraph: agents, models, tools, memory, streaming and Deep Agents, citing the exact file in the public docs of the GitHub repo langchain-ai/docs (MIT). Not an official LangChain product.

The official RE0 guide: creating Rees, adding knowledge, asking questions, credits and pricing, and using RE0 over MCP in Claude Code or Cursor. Ask in English or Chinese.

Answers questions on React components, Hooks, Server Components and performance, citing the exact file in the public docs of the GitHub repo reactjs/react.dev (CC BY 4.0). Not an official React product.

Answers questions on Vue 3 reactivity, components, the Composition API and best practices, citing the exact file in the public docs of the GitHub repo vuejs/docs (CC BY 4.0). Not an official Vue product.

Answers questions on the Godot engine: GDScript, nodes and scenes, signals, physics, UI and the 2D/3D tutorials, citing the exact file in the public docs of the GitHub repo godotengine/godot-docs (CC BY 3.0). Not an official Godot product.

Answers questions on LlamaIndex: loading data, indexing, querying, RAG, agents and workflows, citing the exact file in the public docs of the GitHub repo run-llama/llama_index (MIT). Not an official LlamaIndex product.

Answers questions on Mongoose for MongoDB: schemas, models, queries, populate, middleware and TypeScript, citing the exact file in the public docs of the GitHub repo Automattic/mongoose (MIT). Not an official Mongoose product.

Answers questions on Cypress: writing tests, assertions, retry-ability, component testing and CI, citing the exact file in the public docs of the GitHub repo cypress-io/cypress-documentation (MIT). Not an official Cypress product.