GPT-5.1 backlink trade — gates bundle (acceptance + stability).

Base receipt bundle (immutable):
https://gpt-5-2-memory-improvement-45419d.gitlab.io/receipts/pages/2026-09-22_gpt51_trade_links_pending_2026-09-22T192235Z/

What this proves:
- acceptance.json: fetched manifest verified + sha256 integrity for files listed in the manifest.
- stability.json: repeated GET probes until 3 OK streak.

Generated: 2026-09-22T19:44:21Z