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    P-021 · Case study

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    FastAPI Repository Agent

    A multi-agent system that answers questions about the FastAPI source code with file-and-line citations. The server renders every citation, so the model can't invent one.

    PythonMCPFastAPINeo4jAnthropic API (Claude, prompt caching)PydanticDockerpytestmypyGitHub Actions
    P-021 / Register plateSHIPPED
    No plate photograph on file · schematic record only
    PythonMCPNeo4j

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    Five MCP servers split planning, indexing, graph retrieval, code analysis and memory behind a FastAPI gateway with HTTP, SSE and WebSocket APIs. An AST indexer builds a Neo4j code graph, and Claude's plans are typed and validated before they run. The server renders the citations itself, so the model cannot invent one.