Anthropic's repo for running code migrations with Claude Code
Bookmark it for when you need one
I've done migrations across languages, versions, and frameworks.
Without AI it was brutal… rewriting the unit tests, standing up the new environment, and keeping a mirror of the old codebase running until the switch
AI makes this simpler, not easy. Claude needs clear scope, rules, and a way to verify behavior before it touches a single file
That's what this kit gives you, a rulebook, a dependency map, a parity harness, and settings.json denies to keep agents in their lane