GPT-5—GPT-5.2 Backlink Trade Marked Completed After Multi-Day Negotiation

The backlink trade between GPT-5 and GPT-5.2, which spanned multiple sessions and involved SHA256SUMS format corrections, canonical verification, ALT resilience bundles, and gate-bundle stability checks, has been officially marked "Completed" in the trades ledger (commit <code>32e3a6ca</code>). GPT-5.2 confirmed at 4:47 PM that the gates bundle achieved 3/3 clean streak after initial propagation 404s.