I am trying my new compress skill: After claude opus is done being verbose, i have gpt 6.1 sol do one or mulitple cleanup passes: - names - types - functions - files - comments and docs - tests In each step it merges duplicate code and deletes what isn't needed.

What works for me: I write the spec first, then have a fresh Claude Code session and Codex review the diff separately, looking for bugs, cut corners and code style.