Field note

Custom Code Review rules for Codex via AGENTS.md

July 2026 developer blog: repository rules in AGENTS.md that Codex Code Review can cite on findings.

Source: Custom Code Review rules for Codex — OpenAI Developers

Codex Code Review gains scoped repository rules in AGENTS.md so findings can point at team conventions instead of generic advice. Same file many teams already use for coding agents.

Why it matters for code review

Rules files are becoming the shared control plane across write and review agents (AGENTS.md, CLAUDE.md, BUGBOT.md, greptile.json). Consolidation helps; duplication across five formats does not.