/**
 * Extract persona names from a workflow's YAML frontmatter `deps.personas` list.
 *
 * Expects the frontmatter block to begin and end with `---` delimiters.
 * Looks for:
 *   ```yaml
 *   deps:
 *     personas: [architect, engineer]
 *   ```
 *
 * @returns Array of persona name strings, or empty array if not found.
 */
export declare function extractPersonaNames(workflowMd: string): string[];