My workflow now

1) While walking voice chat with ChatGPT about architecture and various interesting angles for a feature or product

2) Have it create summary of things we talked about

3) use that to seed spec development phase

4) write comprehensive specs using both Claude Code and Codex

5) create todos from specs

6) implement todos using both Claude Code and Codex to check each others work

7) run focused code check prompts e.g. specifically for error handaling, concurrency issues etc. They tend to find more issues in these focused passes.