Function parseFrontmatterObject

src/workspaces/issues/mutate.ts:258–267

Parse a YAML frontmatter block into a plain object, or null when it isn't a * mapping. Yields the RAW object for in-place merge — the record from * `parseIssueContent` has defaults baked in and drops author keys we want to * keep verbatim (the caller has already validated parseability).

(frontmatter: string)

 *  `parseIssueContent` has defaults baked in and drops author keys we want to
 *  keep verbatim (the caller has already validated parseability). */
function parseFrontmatterObject(frontmatter: string): Record<string, unknown> | null {
  let data: unknown
  try {
    data = parseYaml(frontmatter)
  } catch {
    return null
  }
  if (data === null || typeof data !== 'object' || Array.isArray(data)) return null
  return data as Record<string, unknown>
}