writeJsonAtomic (dod-check.ts)

Write JSON marker via rename, ensures atomic dirs, updates covers.

import { mkdir, readFile, rename, writeFile } from "node:fs/promises";
import { homedir } from "node:os";
import { dirname, join, resolve } from "node:path";
import { spawn } from "node:child_process";

interface DoDCheckResult {
  id: string;
  passed: boolean;
  detail: string;
}

type DoDStatus = "DONE" | "NOT_DONE";

interface DoDStatusArtifact {
  generatedAt: string;
  runtimeDir: string;
  status: DoDStatus;
  passed: boolean;
  checks: DoDCheckResult[];
}

interface WorkerProgress {
  cycle?: number;
  lastStep?: {
    id?: string;
    exitCode?: number;
  };
}

interface ProductDoDDefinition {
  fullChinese: boolean;
  nonTechnicalCopy: boolean;
  middleSchoolReadable: boolean;
  globalVisibility: boolean;
  appleNativeUI?: boolean;
  realSubscriptionConnected?: boolean;
  tiAppro

... (truncated -- full source via MCP)