PRD to Plan

Break a PRD into phased vertical slices (tracer bullets). Output: plans/<name>.md.

Pre-loaded context

Before proceeding, use the Glob tool to list files in prds/ directory.

Workflow

1. Read the PRD

Open the PRD file. If no name given, ask: "Which PRD should we plan?" — list each available PRD as an option. Use AskUserQuestion when available; otherwise present as a numbered list.

2. Explore the codebase

Understand current architecture, existing patterns, and integration points.

3. Identify durable architectural decisions

Before slicing, extract decisions that hold across all phases: