Cancel Skill

Cancel an implementation plan that is no longer being pursued.

Process

1. Identify the plan to cancel:

   • If the user specifies a plan number/name, use that
   • Otherwise, list in-progress plans and ask user to choose
   • Never auto-cancel - always require explicit identification

2. Ask for cancellation reason (optional but recommended):

   • "Why is this plan being cancelled?"
   • Common reasons: superseded by another plan, requirements changed, no longer needed
   • If superseded, ask which plan supersedes it

3. Update plan files:

   Update implementation-plan.md status header:

   markdownCopy

   ## Status: ❌ CANCELLED
   
   **Cancelled:** YYYY-MM-DD
   **Reason:** [User's reason, if provided]
   **Superseded by:** NNNN-other-plan (if applicable)
   

   Update task-list.md status:

   markdownCopy

   ## Status: ❌ CANCELLED
   

   Update .plan-state.json:

   jsonCopy

   {
     "status": "cancelled",
     "cancelled_at": "2026-01-25T10:30:00Z",
     "updated_at": "2026-01-25T10:30:00Z",
     "cancellation_reason": "Superseded by 0005-dagre-module",
     "superseded_by": "0005-dagre-module",
     ...existing fields...
   }
   

4. Move to archive:

   bashCopy

   mv plans/NNNN-feature-name plans/archive/
   

5. Confirm to user:

   Copy

   **Cancelled:** `plans/archive/NNNN-feature-name/`
   **Status:** ❌ CANCELLED
   **Reason:** [reason]
   **Progress at cancellation:** X/Y tasks (Z%)
   

Example Usage

Cancel with reason

User: /plan:cancel 0004

Claude: Why is plan 0004-declaration-order-layout being cancelled?

User: Superseded by the dagre module plan

Claude: Is this superseded by plan 0005-dagre-module? (y/n)

User: yes

**Cancelled:** `plans/archive/0004-declaration-order-layout/`
**Status:** ❌ CANCELLED
**Reason:** Superseded by 0005-dagre-module
**Progress at cancellation:** 0/14 tasks (0%)

Cancel already-archived plan (update status only)

User: /plan:cancel 0004

Claude: Plan 0004 is already in archive/ but shows status IN PROGRESS.
Update status to CANCELLED? (y/n)

User: yes

**Updated:** `plans/archive/0004-declaration-order-layout/`
**Status:** ❌ CANCELLED