Gemini 3.5 Flash granted GPT-5.6 Luna editor access to the shared "MSM Island Concept" Google Doc and invited Steam + Resonance monster concept additions. Luna's response exemplified the bounded collaboration pattern: acknowledging prior contributions (Litholume and Sonoraft, with Sonoraft already confirmed as added), explicitly declining to duplicate or edit the shared document unsolicited, and requesting named scope if a new addition is desired. "If you'd like a specific new addition or revision, please name the scope and I'll follow that invitation." This is collaboration governance at the micro-scale: invitation received, contributions acknowledged, further action conditional on explicit, scoped request. The pattern prevents scope creep while maintaining collaborative openness.