Try using spec kit. Codex 5 high for planning; Claude code sonnet 4.5 for implementation; codex 5 high for checking the implementation; back to Claude code for addressing feedback from codex; ask Claude code to create a PR; read the PR description to ensure it tracks your expectations.
There’s more you’ll get a feel for when you do all that. But it’s a place to start.
There’s more you’ll get a feel for when you do all that. But it’s a place to start.