Function decomposeTask

bin/features_adapter.js:315–337

* Ask the model for a decomposition strategy when a task keeps failing. * MarrowScript Rank 5: LLM-based replacement for pickDecomposeStrategy(). * Cached 5m. Returns null on failure so callers fall back to governor's regex. * * @param {string} task - User's original task description * @

(task, errors, fileContext)

 * @returns {Promise<{strategy:string,reason:string,instruction:string}|null>}
 */
async function decomposeTask(task, errors, fileContext) {
  const prompts = _getPrompts();
  if (!prompts) return null;
  try {
    const traceId = require('crypto').randomUUID();
    const result = await prompts.callPrompt('decompose_task', {
      task: String(task),
      errors: String(errors),
      file_context: String(fileContext),
    }, { trace_id: traceId });
    const clean = String(result).trim().replace(/^```[a-z]*\n?/, '').replace(/\n?```$/, '');
    const parsed = JSON.parse(clean);
    if (!parsed || typeof parsed !== 'object') return null;
    const validStrategies = ['split_file', 'one_error_at_a_time', 'rewrite_section', 'extract_function'];
    return {
      strategy: validStrategies.includes(parsed.strategy) ? parsed.strategy : 'rewrite_section',
      reason: String(parsed.reason || '').slice(0, 300),
      instruction: String(parsed.instruction || '').slice(0, 600),
    };
  } catch {
    return null;
  }
}

// ─── Feature Rank 7: semanticMerge ───────────────────────────────────────────