Release script: --review the summary before anything is pushed #160

Parent

#150

What to build

With --review, the release script pauses once, after the summary has been written (by the agent or by the fallback) and before anything is pushed. It prints the summary and asks [y]es / [e]dit / [n]o:

• y: carries on as usual.
• e: opens the summary in $EDITOR, then carries on with what was saved.
• n: stops with nothing pushed (no branch, PR or tag) and exits non-zero.

Without --review, the script never prompts.

Acceptance criteria

• With --review and y, the PR body holds the summary as it was written.
• With --review and e, a scripted $EDITOR changes the summary, and the PR body holds the edited text.
• With --review and n, origin has no new branch, PR or tag, and the script exits non-zero.
• Without --review, the script runs to the tag without reading stdin.
• The README's Releasing section mentions --review.

Blocked by

• Release script: agent-written summary in the bump PR #159