What problem does it solve? Choosing the right technology stack for a new product requires analyzing business requirements, researching current technologies, and coordinating dozens of decisions — a process that is error-prone and often produces inconsistent or outdated choices. ## Core Features & Use Cases - Business Plan Analysis: Reads markdown and PDF business plans from plancasting/businessplan/ and extracts 19 categories of technical signals (multi-tenancy, billing, AI components, notifications, compliance, and more). - Interactive Gap-Filling: Asks only the questions the business plan did not answer, across product-type deep dives, design direction discovery (reference URLs, logos, Figma files, UI component libraries), and feature-specific requirements. - Researched Recommendations: Uses web search to evaluate technologies against maintenance, community, documentation, and Claude Code compatibility criteria, then presents 2-3 options per category. - Configuration Generation: Produces plancasting/tech-stack.md, .env.local, .env.local.example, and .gitignore entries, plus a minimal project scaffold. - Use Case: A founder with a SaaS business plan runs Stage 0 to get a complete, validated stack — database, auth, hosting, payments, AI framework — with credentials collected and verified before development begins. ## Quick Start Ask the assistant to run Stage 0 tech stack discovery for the business plan in plancasting/businessplan/.