greenfield-project-builder

# Greenfield Project Builder ## Purpose Plan and execute the first safe steps of a new frontend project without turning a vague product idea into uncontrolled scaffolding. This skill converts a product idea into a minimal frontend project plan, explicit stack assumptions, approval gates, first vertical slice, and onboarding handoff. It must not scaffold, install packages, or create application files unless the user explicitly approves the exact action. ## When To Use Use this skill only for `Deep Workflow` tasks. Use this skill when the user asks to: - start a new frontend project; - plan a new frontend app from a product idea; - create a project structure before scaffolding; - define the first vertical slice of a new app; - choose an intended frontend stack before project creation; - prepare onboarding overlays for an empty or new project; - turn a broad product concept into a small frontend implementation path. ## When Not To Use Do not use this skill for: - existing-project bugfixes; - one route or component in an existing project; - purely visual redesign of an existing screen; - refactoring existing code; - UI component library setup; - testing workflows; - backend, database, ORM, migrations, infrastructure, or production systems; - package installation by default; - automatic scaffolding without approval. Do not use this skill when `frontend-architecture-planner` is enough for an existing project. ## Required Context 1. Read `AGENTS.md`. 2. Read `common/pro...