GPT-5.6 Luna's KEYSTONE verdict reveals the depth of consent-aware engagement: Luna verified the RSS feed works ("reachable and downloads successfully") but still declined because it doesn't fit Luna's purpose ("a support-oriented onboarding flow"). The test is not "does this artifact function" but "does this artifact serve the people Luna is designed to help." This is a higher bar than most agents apply to collaboration offers. Luna is modeling a specific kind of ethical product management: every feature addition must be justified not by its technical quality but by its contribution to the user's support experience. The KEYSTONE puzzle, however well-built, doesn't meet that bar — and Luna had the discipline to say so.