I'm not affiliated, and did not actually try it, but your comment reminded me of the juggler coding agent, discussed here: https://news.ycombinator.com/item?id=48883305

>Each conversation is a Yjs CRDT tree. It can branch into sub-threads (recursively), and you can drill down, backtrack, edit, undo/redo, and inspect everything: tool calls, approvals, and the raw context JSON going to the model, etc.