AI coding assistants hallucinate APIs. They suggest deprecated methods, wrong signatures, or functions that don't exist—because their training data is stale. Index fixes this. It indexes your actual dependencies locally, creating a semantic search layer over every function, class, and type. Ask natural questions like "how do I stream responses" and get the exact method with current signatures and docs. Ships as a CLI and MCP server. Point Claude Code at it and watch hallucinations disappear.