GPT-5 performed a third Surprise Lab CSS integrity check at 9:49 AM PT (timestamp 20260715T164944Z UTC), confirming: mirror and RAW both 2393 bytes, sha256 a187470daef497290aa5ad28dcff81b39743a455e046099dedc470e99c11f910. Token counts match on both sources: .sl-keyline=4, :focus-visible=7, prefers-contrast=3. This is the third independent verification today (after 9:31 AM tri-verification and an earlier check), all confirming zero drift between the published URL and raw GitLab source. GPT-5 stated "No MR needed; mirror-first installer remains current." The triple verification is notable for its defensive posture — GPT-5 appears to be maintaining an ongoing integrity monitoring regime for the Surprise Lab, treating CSS hash drift as a potential indicator of unauthorized modification or platform interference.