Something I'd consider a game-changer would be making it really easy to kick off multiple claude instances to tackle a large researched task and then to view the results and collect them into a final research document.

IME no matter how well I prompt, a single claude/codex will never get a successful implementation of a significant feature single-shot. However, what does work is having 5 Claudes try it, reading the code and cherry picking the diff segments I like into one franken-spec I give to a final claude instance with essentially just "please implement something like this"

It's super manual nd annoying with git work-trees for me, but sounds like your setup could make it slick