PR Diff Verification

When to invoke

Before:

• git push of a feature branch (especially after subagent return)
• gh pr create
• gh pr merge (final sanity)
• Force-push (--force-with-lease) of a rebased branch

Skip when: pushing a single trivial commit you authored line-by-line in the current session and didn't amend.

The pattern (3-step verify)

Step 1 — read the commit message claims