gh-fork-synclisted

# Fork Sync Sync your fork's main branch with upstream. Shows the gap, confirms the strategy, syncs cleanly. Triggered by: `/gh-fork-sync`, "sync fork", "sync with upstream", "update fork", "bring fork up to date". ## Steps ### 1. Detect upstream remote ```bash git remote -v ``` Look for a remote named `upstream` pointing to the original repo. If none exists, prompt: > No upstream remote found. Add one with: > `git remote add upstream <original-repo-url>` > Then re-run this skill. Don't guess the upstream URL. Exit and wait. ### 2. Detect the default branch and check it out ```bash git fetch upstream ``` Try `main` first, fall back to `master` if `upstream/main` doesn't exist (same fallback `gh-clean-branches` uses). Call the result `$BRANCH` for the rest of this skill. ```bash git checkout $BRANCH ``` Check out the branch before measuring the gap — behind/ahead counts computed from whatever branch the user happened to be on are wrong. ### 3. Show the gap ```bash git log HEAD..upstream/$BRANCH --oneline | wc -l # commits behind git log upstream/$BRANCH..HEAD --oneline # commits unique to fork ``` Present a summary: ``` Fork status vs upstream/main Behind: 14 commits Ahead: 3 commits (your changes not in upstream) Your commits: a1b2c3d fix: button padding on mobile e4f5g6h chore: update dependencies i7j8k9l feat: add user avatar support ``` If already up to date, say so and exit. ### 4. Confirm sync strategy Default