Function assertFileExists

packages/codex-native-api/src/daemon_manager.ts:1239–1243

(filePath: string | null, label: string)

}

function assertFileExists(filePath: string | null, label: string): void {
  if (!filePath || !fs.existsSync(filePath)) {
    throw new Error(`${label} is not installed: ${filePath ?? 'unknown path'}`);
  }
}

function printInstallPlan(plan: CodexNativeApiDaemonInstallPlan): void {
  process.stdout.write(`platform: ${plan.layout.platform}\n`);