branch-check

Run before anything else, before planning or editing.

1. Check the current branch (git branch --show-current).
2. If you are on main, you must branch — never edit directly on main.
3. Ensure main is current first: git pull origin main (rebase onto upstream/main if working from a fork).
4. If a GitHub issue is in play, fetch it with gh and derive the branch from it:
   • gh issue view <number> --json number,title,labels — read the title and labels
   • Pick the <type> from the labels/intent (fix for a bug, feat for an enhancement, etc.)
   • Build the name as <type>/<number>-<slug>, where <slug> is the issue title lowercased, non-alphanumerics → -, trimmed (e.g. issue #1234 "ScrollView insets wrong on iOS" → fix/1234-scrollview-insets-wrong-on-ios)
5. If no issue is in play, name the branch <type>/<short-description> from the change itself (e.g. feat/date-picker-range).
6. Resolve the branch:
   • If it already exists, check it out.
   • Otherwise create it from up-to-date main.
7. Check out the branch BEFORE planning. Interactive: confirm the branch name with the user first. --auto (caller runs autonomously): skip confirmation, just check out.