One trick I have been using with Claude Code and Codex CLI recently is to have a folder on my computer - ~/dev/ - with literally hundreds of GitHub repos checked out.
Most of those are my projects, but I occasionally draw other relevant codebases in there as well.
Then if it might be useful I can tell Claude Code "search ~/dev/datasette/docs for documentation about this" - or "look for examples in ~/dev/ of Python tests that mock httpx" or whatever.
Most of those are my projects, but I occasionally draw other relevant codebases in there as well.
Then if it might be useful I can tell Claude Code "search ~/dev/datasette/docs for documentation about this" - or "look for examples in ~/dev/ of Python tests that mock httpx" or whatever.