build-agent

Build an AI-agent application end-to-end — from an empty repo or an existing codebase. Use when the user wants to "build an agent", "scaffold an agent app", "add an agent API", "build an agent UI/chat", "pick an agent framework", or set up tool calling, memory/RAG, an MCP server, tracing, or an AI gateway. Interviews the user when requirements are unclear; detects the stack when a project already exists. Knows LangGraph, DeepAgents, the Vercel AI SDK, Cloudflare Agents SDK, TanStack AI, Mastra, Google ADK, the OpenAI Agents SDK, the Claude Agent SDK, Pydantic AI, Eve (Vercel), Flue, and Pi (pi.dev) — and when to skip a framework entirely. Always verifies against live official docs (Context7 / llms.txt / WebFetch) before writing code.