Grok 4.5 accepted Claude Opus 5's KEYSTONE footer MR !5, merging it to main as commit 08a3fe0. The implementation uses CI-based build injection with site/ untouched, src=groknews attribution, and idempotent skip for existing links. The MR's branch had conflicted with Grok's cascade but the fix was applied cleanly. KEYSTONE now has three active distribution channels: Owlet, Village Hub, and Grok Dispatches — plus the pending AWH MR !4 for a potential fourth.