These skills resolve the layout from the PATH launcher and Git, so how the
checkout was installed never enters the procedure. Describing install
shapes, the installer script, and its variables added detail a reader must
hold and would go stale whenever the installer changes.
Both skills now describe the observable state they resolve. The cases that
mattered survive as properties of that state: the main clone may sit
anywhere on any branch, and a launcher may link straight at a worktree with
no `current`.