git-sync

name	git-sync
model	haiku
description	Fetch the latest origin/main and rebase the current branch onto it, then optionally create a worktree for a given topic. Use when the user says "mainを最新化して", "git sync", "worktreeを切って", or asks to prepare a branch before starting work. This is a mechanical operation — it runs git commands and reports the result. It never implements features, writes tests, or opens PRs.

Git sync + worktree preparation

Bring the local repo up to date and (optionally) set up an isolated worktree for a topic. This is a mechanical, command-only skill — no design decisions, no code changes.

Steps

1. Fetch and rebase

   git fetch origin
   git rebase origin/main
   

   If there are conflicts, report them and stop — don't resolve automatically.

2. Worktree creation (when a topic is given)

   Use the project's make worktree target:

   make worktree TOPIC=<topic>
   

   This fetches origin/main, creates ../bajutsu-<topic> on branch claude/<topic>, and runs make setup inside. Report the worktree path when done.

   If the user specifies a PREFIX (e.g. their username), pass it through:

   make worktree TOPIC=<topic> PREFIX=<user>
   

3. Report the result: current branch, HEAD commit, worktree path (if created).

What this skill does NOT do

• Implement features or write code
• Run make check or tests
• Create PRs or commits
• Resolve merge conflicts (report and stop)

If the user asks to proceed with implementation after sync, tell them to start a new session with /implement-be or the appropriate skill — that will use the right model.