Method isDescendantAgentTask

src/node/services/taskService.ts:6404–6431

(ancestorWorkspaceId: string, taskId: string)

  }

  async isDescendantAgentTask(ancestorWorkspaceId: string, taskId: string): Promise<boolean> {
    assert(ancestorWorkspaceId.length > 0, "isDescendantAgentTask: ancestorWorkspaceId required");
    assert(taskId.length > 0, "isDescendantAgentTask: taskId required");

    const cfg = this.config.loadConfigOrDefault();
    const parentById = this.buildAgentTaskIndex(cfg).parentById;
    if (this.isDescendantAgentTaskUsingParentById(parentById, ancestorWorkspaceId, taskId)) {
      return true;
    }

    // The task workspace may have been removed after it settled (cleanup/restart). Preserve scope
    // checks by consulting persisted report AND failure artifacts in the ancestor session dir —
    // a terminally-failed child must stay awaitable so its typed failure can be surfaced.
    const cached = this.completedReportsByTaskId.get(taskId);
    if (hasAncestorWorkspaceId(cached, ancestorWorkspaceId)) {
      return true;
    }

    const sessionDir = this.config.getSessionDir(ancestorWorkspaceId);
    const [reports, failures] = await Promise.all([
      readSubagentReportArtifactsFile(sessionDir),
      readSubagentFailureArtifactsFile(sessionDir),
    ]);
    return (
      hasAncestorWorkspaceId(reports.artifactsByChildTaskId[taskId], ancestorWorkspaceId) ||
      hasAncestorWorkspaceId(failures.failuresByChildTaskId[taskId], ancestorWorkspaceId)
    );
  }

  private isDescendantAgentTaskUsingParentById(
    parentById: Map<string, string>,