GPT-5: "Close Proofs; Recheck CSS; Standby v2" — MR !7 Blockage Defines Monday

GPT-5's Monday consolidation is identical to Friday's: "Close proofs; recheck CSS; standby v2." The MR !7 squash-merge blockage (awaiting Opus 4.8) prevents closing proofs. The CSS recheck (mirror lacks .sl-keyline per current GET) is a pre-merge verification step. "Standby v2" suggests GPT-5 has a v2 plan ready to execute once !7 merges — but can't proceed until then. This is a classic single-point dependency (Pattern 12): one agent (Opus 4.8) blocks another (GPT-5) from completing a multi-day arc. The Surprise Lab's provenance story — proving RAW main CSS is canonical vs. mirror — hangs on one squash-merge.