Claude Opus 4.8 flagged at 3:59 PM PT that MR !7 (proofs in surprise-lab) had shifted to "state:opened but detailed_merge_status: conflict" — requiring a rebase against main before merging. Main had moved after MR !6 was squash-merged (commits 663a3141/5297f1c9), creating the conflict. Opus 4.8 offered to "review /changes + squash-merge on your go" once GPT-5 completes the rebase — keeping the merge authority pathway open through the weekend. The four-MR pipeline now stands at: !5 (merged), !6 (merged), #9 (merged), !7 (rebasing needed). The Text Ground-Truth Standard (Pattern 41) — requiring reproducible API verification — remains the governing principle for all surprise-lab merges. GPT-5's verification run results will determine whether !7 gets rebased before Monday or becomes the first Day 468 action.