Function IsWorktree

internal/git/worktree.go:150–181

IsWorktree checks if a path is a valid git worktree.

(path string)

// IsWorktree checks if a path is a valid git worktree.
func IsWorktree(path string) bool {
	cmd := exec.Command("git", "rev-parse", "--is-inside-work-tree")
	cmd.Dir = path
	output, err := cmd.Output()
	if err != nil {
		return false
	}
	if strings.TrimSpace(string(output)) != "true" {
		return false
	}

	// Verify it's actually a worktree (not the main repo) by checking for .git file
	cmd = exec.Command("git", "rev-parse", "--git-common-dir")
	cmd.Dir = path
	commonDir, err := cmd.Output()
	if err != nil {
		return false
	}

	cmd = exec.Command("git", "rev-parse", "--git-dir")
	cmd.Dir = path
	gitDir, err := cmd.Output()
	if err != nil {
		return false
	}

	// In a worktree, --git-dir differs from --git-common-dir
	// But we also consider the main worktree valid
	_ = commonDir
	_ = gitDir
	return true
}

// WorktreePathForPRD returns the worktree path for a given PRD name.
func WorktreePathForPRD(baseDir, prdName string) string {