Carto Automatically Updates AGENTS.md

Carto is an open-source CLI (carto-md) that automatically generates and maintains AGENTS.md. It states that on file save, it extracts routes, models, functions, dependencies, environment variable names, fetch() patterns, import graphs, and DB tables, updating the documentation in about 300ms.

The four main commands are as follows.

• carto init: Detects the stack, creates AGENTS.md, and installs a git hook.
• carto watch: Continuously updates the documentation on every file save.
• carto sync: Refreshes once without a watcher.
• carto impact <file>: Shows the scope of impact and dependent files before making an edit.

FastAPI/Python, Next.js App Router, and Prisma are listed as supported targets, and it explains that even in large monorepos, it summarizes down to at most 50 core files. It claims to run locally with no cloud, telemetry, or secret logging.