Implement a feature using strict test-driven development. Enforces one-test-at-a-time discipline: write failing test (red), minimal code to pass (green), refactor, repeat. Catches regressions after every step.

AI assistant configured for software engineers. TDD discipline, architecture-first planning, vertical slicing, and codebase health auditing.

AI assistant configured for design work in HTML. Junior-designer iteration (assumption + 3 variants), brand-asset acquisition before drafting, fact-check before claiming product specifics, anti-slop discipline.