PRD to Plan

Break a PRD into phased vertical slices (tracer bullets) saved in ./plans/.

Process

1. Confirm PRD is in context; else ask the user for it.
2. Explore the codebase: architecture, patterns, integration layers.
3. Note durable decisions (routes, schema, models, auth, integrations).
4. Draft tracer-bullet phases cutting through ALL layers end-to-end, not one.