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name: plan-feature description: Create a lightweight implementation plan for medium-scope features (1-5 files). Use when you need a plan but not a full PRD.

Plan Feature

Create a lightweight implementation plan for medium-scope features.

When to Use

• Medium features (1-5 files)
• Clear requirements, no UX exploration needed
• Standard patterns apply

Artifacts

• implementation_plan.md artifact
• task.md updated via task_boundary

Approach

Phase 1: Discovery & Impact

1. Proof of Understanding: Summarize feature in one sentence.
2. Holistic Impact Analysis: What else might this affect?

Phase 2: Approach Evaluation

Generate 3-4 strategies.

Evaluate with brief Socratic Debate:

• Proponent: Benefits, consistency with patterns
• Adversary: Complexity, maintenance burden
• Synthesis: Final selection

Phase 3: Design & Execution

File Changes Table

Phased Implementation

Break into atomic, testable steps.

Phase 4: Reflexion

Hostile Architect Review: Identify 3 tech debt risks.

Constraints

• No code generation — plan only
• Steps must be atomic and testable
• No one-off patterns