Phase 4: Plan

The Plan phase converts the spec into an executable task list. Each task has a test and an implementation target.

What happens

1. Break down the spec — Split into discrete, independently testable tasks
2. Define test targets — Specify what each test should assert
3. Define code targets — Identify exact files and functions to modify
4. Order tasks — Sequence for maximum parallelism where possible

Skill

hs-plan