Function writeStateAtomic

src/utils/cacheStats.ts:96–109

(
  filePath: string,
  state: CacheStatsState,
)

 * partial-write corruption and concurrent reads.
 */
export async function writeStateAtomic(
  filePath: string,
  state: CacheStatsState,
): Promise<void> {
  const dir = dirname(filePath)
  await mkdir(dir, { recursive: true })
  const tmp = `${filePath}.${process.pid}.tmp`
  try {
    await writeFile(tmp, JSON.stringify(state), 'utf8')
    await rename(tmp, filePath)
  } catch {
    // Best-effort; silently ignore errors so the UI never crashes
  }
}