Use before any creative work - creating features, building components, adding functionality, or modifying behavior.
Use when implementing new features or applications, or starting complex multi-step tasks that may benefit from structured workflows like brainstorming, TDD, or debugging. NOT for simple questions or straightforward operations.
Use when you have a spec or requirements for a multi-step task, before touching code
Use when implementation is complete, all tests pass, and you need to decide how to integrate the work
Use when executing implementation plans with independent tasks in the current session
Use when completing tasks, implementing major features, or before merging to verify work meets requirements
Use when starting feature work that needs isolation from current workspace or before executing implementation plans - creates isolated git worktrees in <project_root>/.worktrees
Use when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies