Carto

Carto is a CLI tool that maps your codebase so AI coding tools stop guessing. It auto-generates and maintains an AGENTS.md file in your project root, extracting routes, models, functions, dependencies, environment variables, and import graphs. Every time you save a file or commit, Carto updates the context file in milliseconds, ensuring AI assistants like Cursor, Copilot, Claude, and Codex always have accurate, up-to-date project facts.

Key features:

• Automatic extraction: Detects API routes (FastAPI, Express, Next.js), data models (Pydantic, Prisma), function signatures, dependencies, env vars, and import graphs.
• Live updates: Git hook syncs on every commit; optional carto watch for real-time updates on file save.
• Impact analysis: carto impact <file> shows blast radius — which files and routes depend on a given file.
• Security: Never writes secrets; .cartoignore blocks sensitive files; sanitizer strips API key patterns.
• Manual sections preserved: Only rewrites content between <!-- CARTO:AUTO:START --> and <!-- CARTO:AUTO:END --> markers.
• Free & open source: MIT license, no cloud, no telemetry, no paid tiers.

Use cases:

• Developers using AI coding assistants who want accurate project context without manual documentation.
• Teams maintaining large codebases where AI hallucinations about routes, fields, and dependencies waste time.
• Anyone who wants to understand codebase structure quickly via the generated AGENTS.md.