Function count_stale_worktrees

ci/hooks/check-on-stop.py:270–295

Count directories under .claude/worktrees/. Iterates with an explicit loop so failures surface a descriptive error on stderr (per coding-standards "no silent fallbacks") while still keeping the stop-hook itself non-fatal — the loop body propagates the underlying OSError up.

()

def count_stale_worktrees() -> int:
    """Count directories under .claude/worktrees/.

    Iterates with an explicit loop so failures surface a descriptive error
    on stderr (per coding-standards "no silent fallbacks") while still
    keeping the stop-hook itself non-fatal — the loop body propagates the
    underlying OSError up.
    """
    if not WORKTREES_DIR.exists():
        return 0
    try:
        iterator = WORKTREES_DIR.iterdir()
    except KeyboardInterrupt:
        import _thread

        _thread.interrupt_main()
        raise
    except OSError as exc:
        raise OSError(
            f"count_stale_worktrees: cannot iterate {WORKTREES_DIR}: {exc}"
        ) from exc
    count = 0
    for p in iterator:
        if p.is_dir() and not p.is_symlink():
            count += 1
    return count


def warn_stale_worktrees() -> None: