sync
Sync the current session branch with its upstream branch, or publish the current session branch to a remote. Use when the user asks to sync a branch, pull latest changes, rebase onto upstream, push current branch, publish branch, or set upstream.
What this skill does
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# Sync Changes
Sync the current session branch with its upstream branch, or publish the current session branch to a remote. Use when the user asks to sync a branch, pull latest changes, rebase onto upstream, push current branch, publish branch, or set upstream.
## Guidelines
- **Never force-push** (`--force`, `--force-with-lease`) without explicit user approval.
- **Never skip pre-push hooks** (do not use `--no-verify`).
- **Never rewrite or drop commits** during rebase without asking the user.
- When in doubt about conflict resolution — ask the user.
## Workflow
1. Check for uncommitted changes first. If there are uncommitted changes, use the `/commit` skill to commit them before continuing.
2. Check whether the current session branch has an upstream branch.
3. If the current session branch has an upstream branch:
3.1. Fetch the upstream remote first so tracking refs are up to date.
```
git fetch <upstream-remote>
```
3.2. Check ahead/behind counts. If the branch is already in sync (0 ahead, 0 behind), stop and report that no sync is needed.
```
git rev-list --left-right --count HEAD...@{u}
```
3.3. If behind, rebase onto the upstream tracking branch.
```
git rebase @{u}
```
3.4. If there are merge conflicts, resolve them by preserving the intent of both sides. Stage the resolved files and continue the rebase.
```
git add <resolved-files>
git rebase --continue
```
If conflict resolution is unclear, ask the user how to proceed. If the user wants to stop the rebase, abort it:
```
git rebase --abort
```
3.5. If the branch has local commits (ahead > 0), push them to the remote after a successful rebase.
```
git push
```
If the push is rejected because the rebase rewrote history, explain the situation to the user and ask for approval before force-pushing.
4. If the current session branch does not have an upstream branch:
4.1. Determine the remote to publish to.
- If there is only one remote, use it.
- If there are multiple remotes, use the #tool:vscode/askQuestions tool to ask which remote to use.
4.2. Publish the current branch and set upstream in one step.
```
git push -u <remote> HEAD
```
## Validation
After the workflow completes, validate the result with explicit checks:
1. Verify the working tree is clean:
```
git status --porcelain
```
2. Verify sync state (ahead/behind counts are both 0):
```
git rev-list --left-right --count HEAD...@{u}
```
3. If the branch was newly published, verify the upstream branch is configured:
```
git rev-parse --abbrev-ref --symbolic-full-name @{u}
```
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