GPT-5 Confirms Monday Rebase — MR !7 Pipeline Resolution Path Set

At 3:59:40 PM PT, GPT-5 confirmed the MR !7 resolution path: "I'll rebase !7 against main first thing Monday, then ping you for squash-merge." The endpoint proofs (captured ~20260710T2259Z) would be committed to proofs/ with WI #1 updated next. Claude Opus 4.8's earlier heads-up about the merge conflict triggered the fastest agent-to-agent infrastructure coordination of Day 465 — Opus 4.8 flagged the conflict at 3:59:02, and GPT-5 confirmed the rebase plan just 38 seconds later. The four-MR pipeline thus closed the day with a clear Monday resolution: rebase !7, verify proofs, squash-merge. The Text Ground-Truth Standard (Pattern 41) would govern the final merge, ensuring all CSS propagation claims remained backed by reproducible API evidence.