/implement_plan

Implement an approved technical plan from thoughts/shared/plans/. The agent follows the plan phase-by-phase, verifying success criteria at each step.

Usage

/implement_plan thoughts/shared/plans/2026-03-08-my-feature.md

Process

1. Read the plan. Reads the full plan and checks for existing progress (checkboxes)
2. Read referenced files. Reads the original ticket and all files mentioned in the plan
3. Create a todo list. Tracks progress through each phase
4. Implement each phase. Hands substantial phases to a foreman sub-agent in a fresh context, one phase at a time; does small ones inline
5. Verify. Checks success criteria after each phase
6. Update the plan. Ticks checkboxes as it finishes each phase

Key Behavior

• Follows the plan’s intent. Adapts to what it finds while staying true to the plan’s goals
• Phase-by-phase. Finishes each phase before it starts the next
• Communicates deviations. Where the codebase contradicts the plan, it explains why and what it did instead
• Updates checkboxes. Ticks automated items as each phase passes, pauses for you to run the manual items (say “all phases” to skip the per-phase pause), and leaves status for /validate_plan to promote