Plan Phase Executor

Phase Executor from Plan

Use this skill when the user asks to implement a specific phase from an existing plan in docs/plans/.

Required inputs

• Plan path (must be inside docs/plans/).
• Target phase by explicit identifier (Phase N).

If either input is missing, request it and do not start implementation.

Workflow

1) Validate scope and locate phase

1. Verify the plan file exists and is inside docs/plans/.
2. Locate the exact requested phase (### Phase N: or ## Phase N:).
3. If not found or ambiguous, stop and ask for confirmation.

2) Extract executable work

From the target phase, extract:

• Changes list.
• Verification checkboxes.

Do not modify or execute tasks from other phases.

3) Execute implementation task-by-task

Implement incrementally, prioritizing small and verifiable changes.

Rules:

• Reuse existing repository patterns.
• Do not introduce unnecessary abstractions.
• If design/scope is blocked, stop and ask the user for a decision.

4) Run validations by touched surface

Apply minimum validations based on phase change type:

• Backend domain/service/repo/router:
  • make check
  • cd backend && uv run lint-imports
• Frontend UI/routes/data fetch:
  • make check
• Dependency updates:
  • make check
  • cd backend && uv run ruff format --check app tests && uv run lint-imports && uv audit
  • cd frontend && pnpm audit
• Database migrations/schema:
  • make db-init on a running stack
  • smoke test affected flows
• Infra/deploy:
  • make check
  • validate impacted compose/deploy commands

If the phase touches multiple surfaces, run the union of validations.

5) Update plan progress

As tasks in the phase are completed:

1. Mark only existing Verification checkboxes in the target phase ([ ] -> [x]) when evidence is real.
2. Do not create new checkboxes.
3. Do not edit checkboxes from other phases.

If a verification item cannot be completed, leave it unchecked and report the blocker.

Done criteria

A phase is considered complete when:

• Phase changes are implemented.
• Corresponding validations were executed.
• Verifiable Verification checkboxes are updated.

Deliver a final summary including:

• Modified files.
• Executed validations.
• Checked and pending checkboxes in the target phase.