Verification Is The Last Step, Not A Nice-To-Have
Require Codex to verify the exact behavior change instead of stopping at a plausible diff.
A plausible diff is not the same thing as a verified fix. Why verification belongs in the workflow Codex can move from inspection to patching very quickly, which is useful until that speed hides an untested assumption. An agent may read the right file and still misunderstand the full behavior. It may patch the direct failure while missing a second call site, or satisfy the compiler without satisfying the user-visible scenario. That is why the workflow must end with proof. Verification ties the code change back to the original objective. If the task was "stabilize the flaky checkout spec," the…
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