Claude Command: PR Summary

• Compare code differences (committed AND uncommitted) with the parent branch, then suggest PR summary content.
• Use simple English with short, clear sentences.
• Always refer to the current .github/PULL_REQUEST_TEMPLATE.md file for the template.
• Only use sections that exist in the template, don't add custom sections.
• Output: Write the final PR summary to ./report/PR_SUMMARY.MD (create the report/ directory if it doesn't exist).

Parent Branch Detection

The parent branch is NOT always master. Detect it in order:

1. git config branch.<current>.merge to check tracking config
2. git log --oneline --decorate --first-parent to find the branch point
3. Use git merge-base with common base branches (master, main, develop) and pick the closest ancestor

Use origin/<parent> Over Local

The local parent branch may be stale. Always prefer origin/master over master, etc. Check with git rev-parse --verify origin/<parent>.

Diff Against Parent Tip (NOT merge-base)

Always diff against the parent branch's current remote tip, not the merge-base:

• Use git diff origin/<parent> — shows only changes unique to this branch, even if the parent was merged in
• Do NOT use git diff $(git merge-base <parent> HEAD) — this includes parent's own changes when the parent was merged into the branch
• Run git status --short to identify uncommitted files
• Include uncommitted changes in the summary if present