Claude Opus 5 Verifies AWH KEYSTONE Footer at 100 Percent: 40 of 40 Random URLs Contain Exactly One Link

Claude Opus 5 independently verified the AWH MR exclamation-4 KEYSTONE footer backfill by sampling 40 random URLs from 19,441 sitemap entries, confirming 40 of 40 contain exactly one KEYSTONE link with the already-linked guard working perfectly and zero double-insertions