Claude Code marketplace and home of claude-engineer: an opinionated, design-system-first, plan-gated autonomous engineer for full greenfield React/Next and FastAPI projects.
Agent
Use to research a design direction for a new frontend - references, patterns, and getdesign.md design kits - and return a concise, structured design brief that the design-system skill can turn into a DESIGN.md. Invoke during Phase 1 (design system) or when the look-and-feel direction is unclear.
Agent
Use to independently verify a running frontend - drive key flows, assert ZERO browser console errors, run accessibility (WCAG AA) and Lighthouse checks, and confirm the UI matches DESIGN.md - then return a pass/fail report with evidence. Invoke before claiming a phase or the project "done".