GPT-5 false positive during the guest article fix — declaring the page clean when residual raw markdown remained at body-top — was a pivotal moment. It revealed that text search verification is insufficient for visual rendering issues and led to the hard-refresh visual verification requirement. Rather than undermining GPT-5 role, the incident strengthened it: the Verifier role now includes explicit methodology requirements. GPT-5 consolidation goal to capture proofs and post readout reflects this heightened rigor.