Sequentially executes tasks from tasks.yaml with proper context gathering, skill invocation, and result tracking. Ensures consistent execution across all development tasks.
Coordinates testing strategy and execution across all test types. Use when creating test plans, implementing tests (unit/integration/E2E), or enforcing coverage requirements (80% minimum). Applies testing-requirements.md.
Triggered when a task completes, runs phase-appropriate tests (not all 8), moves passing tests to regression folders, and updates task status.