Open-Source Dev Uses Codex and Community Review to Harden Supabase Toolkit Security

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A developer building Tenant Evidence Kit, an open-source TypeScript toolkit for private multi-tenant evidence workflows on Supabase, shared the project with the community and received a detailed security review. The feedback highlighted issues including overly flat authorization roles, unclear deletion privileges, undocumented Row Level Security assumptions, and the absence of behavioral tests. Rather than treating the critique as a documentation exercise, the developer translated it into a tightly scoped implementation task for OpenAI's Codex agent. The first Codex-generated pass introduced regressions, requiring a correction round before producing a shippable result. Version 0.1.3 was ultimately released with operation-specific permissions, an upgrade-safe migration file, pgTAP behavioral tests, and explicit RLS boundary documentation.

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