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Research files synthesized: - STACK.md: Flutter + Supabase + Riverpod recommended stack - FEATURES.md: 7 table stakes, 6 differentiators, 7 anti-features identified - ARCHITECTURE.md: Offline-first sync with optimistic locking, RLS multi-tenancy - PITFALLS.md: 5 critical pitfalls (v1), 8 moderate (v1.5), 3 minor (v2+) - SUMMARY.md: Executive synthesis with 3-phase roadmap implications Key findings: - Stack: Flutter + Supabase free tier + mobile_scanner + Open Food Facts - Critical pitfalls: Barcode mismatches, timezone bugs, sync conflicts, setup complexity, notification fatigue - Phase structure: MVP (core) → expansion (usage tracking) → differentiation (prediction + sales) - All research grounded in ecosystem analysis (12+ competitors), official documentation, and production incidents Confidence: HIGH Ready for roadmap creation: YES Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>