technical-implementation

Execute implementation plans using strict TDD workflow with quality gates. Use when: (1) Implementing a plan from docs/workflow/planning/{topic}.md, (2) User says 'implement', 'build', or 'code this' with a plan available, (3) Ad hoc coding that should follow TDD and quality standards, (4) Bug fixes or features benefiting from structured implementation. Writes tests first, implements to pass, commits frequently, stops for user approval between phases.