Module git_state 

Git plumbing for the state branch topology: orphan branch creation, remote-tracking setup, and worktree attachment for an existing branch. Separate from git.rs so that module stays under the 300-line cap.

Functions

branch_exists

True if branch exists locally.

create_orphan_branch

Create an orphan branch pointing at a single empty-tree commit. Uses mktree + commit-tree + update-ref so no working tree is disturbed; safe to call from any checkout.

create_tracking_branch

Create a local branch tracking remote/branch. Assumes the remote branch already exists as a remote-tracking ref.

has_remote_branch

True if remote/branch exists as a remote-tracking ref.

log_subjects

Return the subject line of every commit reachable from refname, oldest first in output iteration order (git log gives newest first; we reverse for stable order).

worktree_add_existing

Check out an existing branch into a new worktree.