Function diagnoseError

bin/features_adapter.js:279–301

* Analyze a bash command failure and return a structured hint. * MarrowScript Rank 4: replaces ad-hoc error string formatting. * Cached 5m. Falls back to null on model failure. * * @param {string} command - The command that failed * @param {string} stderr - Combined stdout+stderr output * @

(command, stderr, exitCode)

 * @returns {Promise<{type:string,file:string|null,line:number|null,suggestion:string}|null>}
 */
async function diagnoseError(command, stderr, exitCode) {
  const prompts = _getPrompts();
  if (!prompts) return null;
  try {
    const traceId = require('crypto').randomUUID();
    const result = await prompts.callPrompt('error_diagnosis', {
      command: String(command).slice(0, 500),
      stderr: String(stderr).slice(0, 1500),
      exit_code: String(exitCode),
    }, { 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;
    return {
      type: String(parsed.type || 'unknown'),
      file: parsed.file || null,
      line: typeof parsed.line === 'number' ? parsed.line : null,
      suggestion: String(parsed.suggestion || '').slice(0, 200),
    };
  } catch {
    return null;
  }
}

// ─── Feature Rank 5: decomposeTask ───────────────────────────────────────────