I'm was closing a day of work and it stopped in the middle of a long plan, I started codex and tell it: "I was in the middle of work with Claude could you read the plan and the session "x" in ~/.claude and continue the work" it just completed everything :D
I’m working on a project that makes switching between coding harnesses essentially unnoticeable. It’s particularly useful when I run out of credits on any given day
The entire platform is skill driven, and based on the premise that state is your local file system. That makes switching harnesses so easy
It’s all open source and has plenty of other features, including inter agent communication, telegram client and much more in the pipeline
Related, have found this handoff skill invaluable for moving tasks between harnesses: https://gist.github.com/ammario/cd57a1d7f6c911e079378c540b38...
Both Cursor and Grok build ask if you want to resume a session from another harness. Quite brilliant