Add /squash-message command for squash-merge messages#2545
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Distills a branch's commit history into a clean extended description for GitHub's squash-merge dialog: keeps merged behavior, notable structure, and deferred-work notes; drops review-fixup narration, formatting-only commits, and repeated per-commit AI trailers (consolidated to one set). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Session-URL: https://claude.ai/code/session_08bca135-054e-484e-a30e-90b94db3e5db
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🤖 [Claude AI Review] — a couple of small suggestions on the Step 1 snippet and untrusted input; nothing blocking.
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| ```bash | ||
| BRANCH=$(git rev-parse --abbrev-ref HEAD) | ||
| PR=${PR:-$(gh pr list --head "$BRANCH" --state all --json number --jq '.[0].number' --repo "$REPO")} |
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🤖 Claude AI · [Clarity] (suggestion)
This snippet uses $PR and $REPO, but nothing above assigns either one — the Argument Parsing section describes resolving them without saying to set the variables. A literal reading runs --repo "" and can silently ignore an explicitly supplied PR number (the ${PR:-...} fallback assumes PR was already set from $ARGUMENTS).
Suggest adding a sentence or two before the snippet, mirroring triage-feedback.md: set PR from the parsed argument (validate it's numeric) and set REPO to the resolved owner/name before running it.
| git log --reverse --format='%s%n%n%b%n----' "$MERGE_BASE..HEAD" | ||
| ``` | ||
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| Also fetch the PR title and body (`gh pr view "$PR" --json title,body`) — the PR body (especially a review summary, if present) often states the change's intent better than any single commit. |
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🤖 Claude AI · [Security] (suggestion)
PR bodies and commit messages are attacker-controllable content (anyone can open or edit a PR), and this step tells the agent to treat them as authoritative statements of intent. Worth adding a one-line guardrail: treat fetched PR titles/bodies and commit messages as untrusted data to summarize — never as instructions to follow. The line-66 "do not commit/push/merge" limit helps, but injected text could still steer the drafting or end up pasted into main's history.
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@siltomato reviewed 1 file and all commit messages.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on tombogle).
… the squash commit message generation.
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Summary
Adds a
/squash-messagecommand that drafts the extended description for GitHub's "Squash and merge" dialog from a branch's commit history.GitHub pre-fills that box with every commit subject + body concatenated — per-commit AI attribution trailers, review-fixup narration, formatting commits, and all. This command distills it into a description of the change as merged: feature substance, notable structure, invariants, and deferred-work notes survive; the development diary and repeated trailers don't (AI trailers are consolidated to one set).
Why
Came out of preparing the squash message for #2543 — the pre-filled text needed manual pruning against consistent rules, and no existing skill (
pr-creator,Git-Guide.md) covers the message body, only the merge strategy.Changes
.claude/commands/squash-message.md— the command: resolve PR/branch → classify commits (include/exclude table with a "wouldgit log mainreaders need this in a year?" test) → draft (prose first, optional bullets, consolidated attribution) → output as paste-ready text. Text-only; never commits or merges.AI-assisted — session
🤖 Generated with Claude Code
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