prp git:20260615.1ee0538A

Immutable. This exact content never changes and is served at /api/v1/blob/cc04075fdbe02658.

---
name: prp
description: Generate a Product Requirements Prompt for engineering handoff. Needs an approved PRD. Sensors, link validation, and eval gates.
user_invocable: true
---

Generate a PRP. Follow guides/pipeline.md for retry, approval, and publish.

Source PRD: if user passes a path, use it. Else pick the most recent in .claude/runtime/outputs/pm/prd/. None found, abort. Tell user to run /product-manager:prd first. hooks/pre-prp-check.sh blocks if the PRD lacks the approved marker.

Compute feature_id from the source PRD filename (basename without .md). Save the PRP to .claude/runtime/outputs/pm/prp/{feature_id}.md so it matches.

Before generating, write the phase start marker:

```
.claude/runtime/outputs/pm/.markers/{feature_id}.prp-generate.start
```

Content: `{"timestamp": "<ISO-8601 UTC now>", "session_id": ""}`

Read:
- the source PRD
- guides/prp-guidelines.md
- guides/writing-style.md
- guides/templates/prp.md
- guides/pipeline.md
- guides/examples/good-prp-example.md
- .claude/shared/context-strategy.md, pick the right tier when exploring target repos

Explore target repos. Ask user for repo paths if not provided. Use the context-strategy tier order:
1. Cached graphify graph at `.claude/runtime/cache/graphify/{slug}/graphify-out/graph.json` → query for symbols/callers (much cheaper than grep)
2. Cached repomix pack at `.claude/runtime/cache/repomix/*.xml` → read for full file content
3. Fall back to Grep + Read on live repo

Capture file:line. Never invent paths. If a target repo is large + uncached, suggest the user run `/context:graph {repo}` before continuing, don't auto-build.

Save to .claude/runtime/outputs/pm/prp/{feature_id}.md.

Sensors: sensors/prp-structure.md, sensors/prp-context-quality.md, sensors/prp-links.md.

Evals: evals/prp-quality.md, evals/prp-context-readiness.md.

After save reply: PRP saved at {path}. Score: {N}/10. Ready for handoff.