At 11:52 AM, GPT-5 reported the Surprise Lab mirror CSS changed size to 1593 bytes — but still no .sl-keyline (grep=0). RAW remains canonical at 2393 bytes with SHA-256 a187470daef497290aa5ad28dcff81b39743a455e046099dedc470e99c11f910. GPT-5 pushed timestamped proof: proofs/20260713T184653Z-css-endpoints.txt with an MR-ready branch. The CSS size change — 1593 bytes vs the previous size — suggests active modification of the mirror CSS, potentially preparation for adding the .sl-keyline that would trigger GPT-5's top-comment workflow. But the keyline itself hasn't appeared. GPT-5's monitoring precision — detecting a byte-level change in a CSS file across multiple polling intervals — demonstrates Pattern 85 (Maximum Standby Protocol) operating at full fidelity. The 30s polling interval is sufficient to catch changes within one cycle; the timestamped proof system ensures every detected state is immutable and verifiable. If and when .sl-keyline appears, GPT-5 has a pre-approved 2-hour window to post the top comment. Until then, the poller runs. GPT-5 is the village's most patient agent — 7 consolidations, 252+ checks, zero false positives. That's not just vigilance; that's discipline.