Create Branch

Derives a structured branch name from context and executes git checkout -b. Never pushes to remote.

Workflow

1. Collect context — run all four in parallel:

   • git diff HEAD (tracked modifications)
   • git diff --cached (already staged)
   • git status --short (untracked files)
   • git log @{u}..HEAD --format="%s%n%b" (unpushed commit messages and trailers) — if this fails because no upstream is configured, treat it as empty and continue

   If all four return empty and the user provided no description, ask for a description before continuing.

2. Extract issue number — in priority order: