Similar with a todo.md in the project which outlines work to be done.. this gets combined with developer and/or user documentation which outlines features and how they're expected to work. I'll iterate with the agent on the planning and documentation through several times until the documentation and plan look good. The only gotcha I've had a couple times is I'll have the testing and spec before implementation and sometimes the agent will try to edit tests rather than making the implementation match spec/tests.

I'm definitely baby sitting the process more than vibe coding, and review each cycle's results. As for languages, mostly TS/JS and Rust with a bit of C# here and there depending on what I need. Claude Code's Opus does a pretty good job with Rust, so for anything personal, I've just gone with it.

Work has been limited to working out specific problems, or a small utility/library that I can pull in, but on my own system, separate from work resources.