Dui Toledo

I gave Opus 4.6 and Codex 5.3 the same task: migrate a personal project from DynamoDB to PostgreSQL/Supabase. Codex completely failed, so I tried something different. I had Opus create a plan based on its own successful PR, and gave that plan to Codex as specs. Codex built a working PR this time, but the quality gap was clear: no compile-time query checking, JSONB still stored in one of the columns, 7 indexes vs 13. The interesting part: when I asked Codex to compare both PRs, it called itself "leaner" and described Opus's work as "hardened / systemic migration." I think it may be optimizing for minimal diff size as a design philosophy rather than architectural depth. I don't know how these types of decisions can be reliably delegated to agents yet.