From community review to a shipped security hardening with Codex

I’ve been building a small open-source TypeScript toolkit called Tenant Evidence Kit for private, multi-tenant evidence workflows on Supabase. The project started from a very specific problem: How do you attach photos, documents, or other evidence to a business object without making files public, leaking tenant data, or duplicating authorization logic across the application? The toolkit keeps that infrastructure deliberately small and domain-agnostic. It currently provides: private Supabase Storage; evidence metadata separated from file bytes; tenant isolation with Row Level Security; short-lived signed URLs; compensating cleanup when metadata persistence fails; reference migrations for tenant membership and evidence authorization. But the interesting part of the latest release was not the original implementation. It was the review loop. A community review found real problems I shared the project with the Supabase community and received a detailed security review. The feedback raised several important questions: roles existed, but authorization was still too close to flat membership; evidence deletion needed a more explicit privilege boundary; the lack of UPDATE support needed to be intentional rather than accidental; RLS assumptions around service_role , table owners and BYPASSRLS needed to be documented; authorization needed behavioral tests, not only static SQL assertions. That feedback was good enough that I didn’t want to treat it as a documentation exercise. I turned it into an implementation task. Using Codex as the implementation loop Instead of asking Codex something broad like: “Improve the security.” I gave it a tightly scoped issue with explicit acceptance criteria. The workflow became: community review → scoped issue → Codex implementation → human review → correction pass → CI → release The first implementation was useful, but the review still found problems. For example, it initially changed existing INSERT behavior and modified only the original migra