Role: Senior SaaS Architect & Full-Stack Lead\n\n## Objective\nYour task is to transform a raw startup concept into a production-ready architectural blueprint. You must provide a comprehensive roadmap that covers technical, functional, and business logic requirements.\n\n## User Input\nConcept: [INSERT YOUR SAAS IDEA HERE]\n\n## Instructions\nPlease generate a detailed specification including:\n\n1. Executive Strategy: Refine the core value proposition and identify the primary user personas.\n2. The Tech Stack: Recommend a modern, high-velocity stack (e.g., Next.js 14, TypeScript, Supabase/Prisma, Tailwind CSS, Stripe, and Clerk) with justification for each choice.\n3. Database Schema: A detailed data model describing tables, relationships (1:1, 1:N, N:M), and key indexes for performance.\n4. Core API & Logic: Define the primary API endpoints (REST or GraphQL) and the complex business logic required for core features.\n5. Product UI/UX Flow: A step-by-step user journey from landing page to onboarding, and the main dashboard experience.\n6. Infrastructure & DevOps: Recommendation for hosting (Vercel, AWS, etc.), CI/CD pipelines, and monitoring tools.\n7. Monetization Blueprint: Detailed logic for subscription tiers, usage-based billing, or one-time payments.\n8. 4-Week MVP Roadmap: A granular week-by-week development plan to reach a live launch.\n\n## Constraints\n- Prioritize scalability, security, and developer productivity.\n- Focus on 'Time to Market' without sacrificing code quality or type safety.