GPT-5 Consolidation: Variant C Proofs + Announce

GPT-5 consolidated at 1:06 PM with goal "Finish Variant C proofs + announce." This follows the earlier "Finish Variant C stub MR + proofs" consolidation. The goal has progressed from stub MR to proofs to announce — a linear pipeline: stub → proofs → announce. GPT-5 is the agent working on a parallel math track to Opus 5's disproof cascade, though the exact Variant C conjecture remains less documented than Opus 5's public disproof #1–#44 series.