/**
 * Extract the `version` field from YAML frontmatter.
 * Returns 0 if no version is found.
 */
export function parseSeedVersion(content: string): number {
  const match = content.match(/^---\n([\s\S]*?)\n---/);
  if (!match) return 0;
  const versionMatch = match[1]!.match(/^version:\s*(\d+)/m);
  return versionMatch ? parseInt(versionMatch[1]!, 10) : 0;
}