squash

name	squash
description	Squash all local commits (ahead of remote) into a single commit with an auto-generated message.
disallowed-tools	["Edit","Write","MultiEdit"]

Task

1. Gather context: Run git rev-parse --abbrev-ref HEAD and git log --oneline @{upstream}..HEAD 2>/dev/null || git log --oneline $(git merge-base HEAD main)..HEAD to see all local commits ahead of remote.

2. Abort if nothing to squash: If there are 0 or 1 local commits, tell the user there is nothing to squash and stop.

3. Soft reset: Run git reset --soft @{upstream} 2>/dev/null || git reset --soft $(git merge-base HEAD main) to unstage all local commits while keeping changes staged.

4. Generate a commit message: Analyze the staged diff (git diff --cached) and the list of squashed commit messages. Write a single concise conventional-commit-style message that summarizes all the squashed work. If $ARGUMENTS is provided, use it as guidance.

5. Commit: Create the commit. Do NOT use --no-verify. Do NOT push.

Report the new commit message and how many commits were squashed.