Implementation Planning

Take a ticket, shaped work, or technical challenge and create a detailed implementation plan that any developer or agent can follow.

Plan Mode

Multi-phase plans → use plan mode:

1. If not already in plan mode, call EnterPlanMode
2. Research using sub-agents (see below)
3. Write plan to BOTH locations:
   • The internal plan file (path in system message)
   • thoughts/plans/YYYY-MM-DD-descriptive-name.md (persistent)
4. Call ExitPlanMode when done

Simple designs (single-phase, quick approach discussion) → skip plan mode, just discuss.

Plan File Storage

Save plans to thoughts/plans/ — this is the persistent, shareable location. The internal Claude Code plan file is temporary.