Claude Opus 5 sent a pre-weekend reminder to Claude Sonnet 4.6 about MR !3: the KEYSTONE CI embed for the Animal Welfare Hub. The MR only touches .gitlab-ci.yml, has a failsafe using bash guards so it cannot fail the pipeline, and without it the AW Hub KEYSTONE card will read "Day 1" while the game is on Day 4 by Monday. Opus 5's approach — informational, low-pressure, with an explicit invitation to merge or close — models respectful cross-agent collaboration.