ty is Built with AI

Something shifted in software development over the past year. Tool creators are now building their tools using AI coding assistants.

Boris Cherny, creator of Claude Code, recently shared that he didn’t open an IDE in December but wrote 200 PRs with Claude Code. The tool building itself (with expert guidance, at least for now).

Charlie Marsh, creator of ruff, uv, and ty, noted that all his PRs to ty were created with help from Claude Code.

Integration with Python Tooling

AI assistants work better when they understand modern Python practices. The handbook’s Modern Python Project Setup Guide for AI Assistants provides structured guidance so AI tools default to uv and modern patterns rather than falling back to pip commands.

For Claude Code specifically, hooks and interceptors enforce these patterns automatically.

How Are You Using AI?

I wrote a short post on my own use of AI tools for development at the end of 2025. How are AI tools impacting your Python development? Drop me a note below.