Over the past four months, our AI code reviewer has flagged nearly a quarter of a million deviations from Cloudflare engineering standards (what we’ll call “violations” in this post) and blocked 16,000 merges. Our spec reviewer agent has evaluated close to 600 technical designs against the same standards before implementation began. Both systems draw from the Cloudflare Codex, a shared source of engineering guidance built for people and agents. This post explains why we built the Codex, how it s...