Six-category brainstorm (first-5min hook, mid-game stagnation, long-term meta, social loops, ad-friendly monetization, polish/SFX) consolidated into a master spec; Phase 0 hotfix decomposed into 8 implementer-ready tasks (haptic, SFX, legendary shake, lucky fusion, combo meter, discovery hero, welcome gift, ad slot). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>