What problem does it solve?
Planning feature work from a PRD or vague conversation context is slow and error-prone, often leading to horizontal breakdowns, missing dependencies, and unclear build order.
Core Features & Use Cases
- Executable slice planning: Converts requirements into vertical tracer bullets that are demoable end-to-end.
- TDD strategy per slice: Defines a test-first (RED→GREEN) cycle for each slice while keeping tests focused on behavior.
- Workflow-aware scoping: Adjusts planned phases based on workflow state or a single scope check question.
- Build-ready handoff: Writes the resulting plan to .claude/plan.md so /build-feature can execute it.
Use case example: You have a PRD for a new feature and want the engineering task broken into small slices that can be implemented and verified one by one in the correct schema→storage→routes→hooks→components sequence.
Quick Start
Ask the AI to plan this feature by responding with your PRD or current requirements, then request: "Create a plan for implementing this feature with vertical slices and a TDD strategy."