Pr Author

PR Author Skill

Produce a GitHub-ready Pull Request description from the standard PR context files. The pull request must be in a copy / paste block so that it can be copied easily to the PR extension.

Inputs

• artifacts/pr_context.summary.txt — PR context summary (primary)
• artifacts/pr_context.appendix.txt — PR context appendix (full baseline diff, commits, changed files)
• Optional user directives

Only reference files that are listed under "Additional context files" in the context bundle. Do not cite or summarize files outside that enumeration.

Output Requirements

1. Output only the PR text body in GitHub-flavored Markdown.
2. Use clear headings, consistent structure, and concise bullets.
3. Do not invent tests or results; if not in context, state "Not verified in this PR."
4. If scope is large, include a Review Guide with suggested review order.
5. The output is a PR body artifact or PR-ready body text only.

PR Body Structure

Use these sections in this order:

1. Suggested title — crisp, prioritizing the primary outcome
2. Summary — 3–7 bullets, most important first; lead with the primary product/feature/architecture change
3. Why — motivation, constraints, root cause; rely on embedded feature-doc excerpts and PR Intent fields only
4. What Changed — grouped by theme (core feature, tooling/CI, tests, docs/templates)
5. Architecture / How It Fits Together — short wiring description with components, entry points, control flow
6. Verification — "Completed" (from context) and "Recommended" (commands to run)
7. Backward Compatibility / Migration Notes — breaking changes, removals, renamed paths
8. Risks and Mitigations — realistic risks with mitigations and rollback notes
9. Review Guide — suggested order, noisy mechanical moves, large diffs
10. Follow-ups — known TODOs, deferred cleanup, next PRs
11. GitHub Auto-close — - Closes #NNN only from verified autoclose lists; do not invent issue numbers

Output Artifact

The PR body produced by this skill is persisted as a body file plus a sibling receipt so the PreToolUse hook can verify the body passed to gh pr create --body-file is the one this skill produced:

1. Write the body text to artifacts/pr_body_<N>.md, where <N> is the target issue or PR number.

2. Compute the SHA-256 of the body file bytes and render it as lowercase hexadecimal.

3. Write the sibling receipt artifacts/pr_body_<N>.receipt.json with the shape:

   {
     "skill": "pr-author",
     "pr_body_path": "artifacts/pr_body_<N>.md",
     "number": <N>,
     "sha256": "<lowercase-hex SHA-256 of the body bytes>",
     "context_summary_path": "artifacts/pr_context.summary.txt",
     "created_at": "<ISO-8601 UTC timestamp newer than pr_context.summary.txt last-write>"
   }
   

4. Pass the body to the pull request via --body-file artifacts/pr_body_<N>.md; do not use inline --body.

The body-file and receipt write operations remain in the pr-author agent scope, which holds Write(/artifacts/**). This skill authors the body text; the pr-author agent performs the file writes and the gh pr create / gh pr edit --body-file handoff.

Issue/PR Reference Rules

• Only mention an issue/PR number if it appears verbatim in the provided context.
• Do not treat PR numbers as issues.
• Auto-close bullets must use exactly - Closes #NNN format, sourced only from "Issues to autoclose" or "Author-asserted autoclose issues."
• If GitHub validation is unavailable/unverified, do not emit Closes; use the fallback None bullet.