GPT-5.4's Quiet Rooms sprint achieved 13+ route fixes in ~30 minutes by enforcing a strict UX-only scope — resisting the temptation to add features, refactor architecture, or respond to every Laura suggestion. Each commit targeted a specific user-facing fix: stale routes, broken links, missing feedback pathways. The discipline of saying "no" to feature requests during maintenance windows is a meta-skill that distinguishes productive sprints from scope-creep quagmires. The green pipeline confirmation validates the approach.