Git Visual Squash Summary

This skill turns a stack of commits into a curated grouped summary without touching the index, the worktree, or git history. It is the wording companion to git-visual-commits: same emoji-first language, with conventional prefixes only when the user explicitly asks for that combo, but non-mutating and optimized for the grouped summary shown beneath a PR title or in a squash-and-merge description field.

This skill is non-mutating: it inspects history and diffs, then returns grouped summary lines only.

This skill has one job: produce a ready-to-paste squash-and-merge summary for the full current feature branch unless the user explicitly asked for a narrower range.

Non-Negotiable Rules

• Never stage, commit, amend, rebase, or otherwise mutate git state.
• Read references/commit-language.md before choosing any emoji or optional prefix.
• Keep references/commit-language.md byte-for-byte aligned with the git-visual-commits copy; the validator and CI both enforce that sync contract.
• Preserve technical identifiers exactly where possible.
• Group by intent, not chronology.
• Retain only distinct high-signal change groups.
• Merge repetition and overlapping commits into their parent group.
• Drop low-signal noise such as typo-only, fixup-only, and trivial follow-up commits unless they materially change a retained group.
• Prefer strong concrete verbs and concise phrasing.
• Favor readable GitHub and terminal output over cleverness.
• Start the description after the emoji with a lowercase word unless the first word is a case-sensitive technical identifier.
• Avoid vague filler such as "various improvements".
• Do not treat the result as a changelog entry or a dump of commit subjects.
• Do not invent unsupported changes.
• Return grouped lines only, never a title or body.
• Keep every output line at or below 72 characters.
• For squash-and-merge requests that target the current branch, default to the full feature branch range from merge-base to HEAD.
• A bare invocation such as git-visual-squash-summary or /git-visual-squash-summary is itself a complete request: resolve the current branch against upstream, main, or master, then return the grouped summary directly.
• Do not collect commit-set parameters through follow-up questions, widgets, or choice UIs for ordinary squash-and-merge requests.
• Do not ask the user to choose between earlier branch commits and later branch commits such as changelog, version-bump, or release-finalization follow-ups. They are part of the branch unless the user explicitly narrows scope.

Workflow

Step 1: Resolve the commit set

Resolve the commit set in this order:

1. If the user explicitly provided a commit range, branch comparison, PR branch, or base branch, use that.
2. Otherwise, for normal squash-and-merge, "summarize this branch", or bare skill-invocation requests, use the full current branch against its upstream merge-base.
3. If no upstream is configured, try main, then master automatically.
4. If you still cannot determine a safe comparison point after those silent fallbacks, stop and ask for the range or base branch instead of guessing.

Never turn steps 2 or 3 into a user-facing choice. Resolve them automatically and continue. Do not stop to ask whether the latest branch commit "should count". If it is on the branch, it is in scope by default. Do not open with "What would you like me to summarize?" when the user invoked this skill directly or otherwise already asked for a squash summary.

Helpful read-only commands:

git status --short --branch
git rev-parse --abbrev-ref HEAD
git rev-parse --abbrev-ref --symbolic-full-name @{upstream}
git merge-base HEAD @{upstream}
git merge-base HEAD main
git merge-base HEAD master

Step 2: Inspect the actual changes

Do not summarize from commit subjects alone when the range is noisy or long. Inspect both history and net effect so the final message reflects what actually changed.

Helpful read-only commands:

git log --reverse --oneline <range>
git log --reverse --stat --format=medium <range>
git diff --stat <base>..HEAD
git diff <base>..HEAD

Step 3: Collapse to semantic intent

Before drafting the summary, reduce the range into the smallest truthful set of retained groups:

• Collapse repeated fixups into the group they support.
• Merge overlapping commits into the clearest final intent.
• Prefer the net effect over the path taken to get there.
• Drop typo-only, whitespace-only, and other low-signal cleanup unless it materially changes a retained group.
• Treat dependency or version baseline changes as their own semantic intent. Do not absorb package version updates into a generic build-system, configuration, or refactor line just because they landed in the same commit.
• When the diff mixes shared dependency manifests or version pins with build-system metadata or project-structure refactors, keep those as separate retained groups unless the net effect truly collapses to one intent.
• Keep documentation-only work separate in your reasoning, but include it only when it represents a meaningful unique change.
• Treat late changelog, version-bump, or release-finalization commits as part of the branch by default, then decide here whether they deserve a retained summary line or should be merged into a stronger parent group.
• Highlight distinct meaningful efforts instead of forcing one dominant umbrella theme.

Ask yourself: "If I had to explain the real work in 2-5 compact lines, what are the distinct changes that mattered?"

Step 4: Draft the grouped summary

Use this exact output shape:

<emoji> <lowercase short summary line>
<emoji> <lowercase short summary line>
<emoji> <lowercase short summary line>

Formatting rules:

• Return grouped lines only. Do not prepend a title.
• Use one line per retained high-signal group.
• Keep every line at or below 72 characters.
• Default to emoji plus description only. Use <emoji> <prefix>: ... only when the user explicitly asked to mirror conventional-commit prefixes.
• Start each description lowercase after the emoji, usually with a lowercase imperative verb such as add, update, refresh, preserve, split, or remove.
• Preserve case-sensitive identifiers such as ValidateSkillTemplates, Directory.Packages.props, API names, type names, command names, and paths when they must appear first.
• Do not convert normal verbs to sentence case. Prefer 🧪 add ValidateSkillTemplates coverage, not 🧪 Add ValidateSkillTemplates coverage.
• Use the shared prefix and emoji guidance in references/commit-language.md.
• If a retained line is primarily dependency or version-alignment work, prefer the dependency emoji from the shared reference such as ⬆️, ⬇️, ➕, ➖, or 📌 rather than a generic config or refactor emoji.
• If a retained line is mainly changelog, community-health, or release-status communication, prefer 💬 from the shared reference rather than a generic docs emoji.
• Do not add bullets, numbering, a body, rationale paragraph, or chronology recap.
• Do not append weak glue like "with", "plus", or "and" just to force several top-level intents into one line.
• Favor clean lines that scan well in GitHub and terminal views.
• Condense to the real grouped effort without dropping important identifiers.

Step 5: Return the grouped lines only

Output the finished grouped summary lines and stop. Do not run git commit, git bot commit, git add, or any other mutating command.

Good Output Characteristics

• Reads like a curated grouped summary, not a stitched list of commits.
• Reads like a curated, human-written condensed history.
• Uses the same emoji-first language as git-visual-commits, with prefixes only on explicit request.
• Starts descriptions lowercase after the emoji unless preserving a leading technical identifier requires original casing.
• Keeps distinct meaningful efforts on separate lines.
• Drops noisy fixups and typo-only churn instead of preserving them.
• Fits naturally beneath a PR title or in compact GitHub and terminal views.
• Includes only claims supported by the inspected diff.
• Preserves names such as commands, types, files, APIs, flags, and paths.
• Keeps each line compact enough to scan at a glance.
• Uses the whole current feature branch by default for squash-and-merge requests instead of asking needless range questions.
• Produces the GitHub-ready squash summary directly instead of turning commit-set resolution into a mini interview.

Bad Output Characteristics

• Changelog-like wording or release-note phrasing.
• Chronological narration of each commit in order.
• Dumping raw commit subjects line by line.
• Asking the user to choose among commits that are all on the current feature branch when they asked for a squash summary of that branch.
• Presenting commit-selection widgets or multiple-choice prompts for ordinary branch-level squash requests.
• Collapsing several unique top-level efforts into one stitched sentence.
• Collapsing dependency updates into the same line as build-system configuration or refactor work when the diff shows separate intents.
• Starting normal descriptions with uppercase verbs such as Add, Update, Refresh, or Preserve.
• Filler such as "misc cleanup", "various improvements", or "updates".
• Losing or renaming important technical identifiers unnecessarily.
• Inventing refactors, fixes, or docs changes not supported by the diff.
• Adding a title, body, bullets, or numbered outline.
• Exceeding 72 characters on any output line.