export type BuildArch = "arm64" | "x64" | "universal";export type BuildPlatform = "mac" | "linux" | "win"; interface PlatformConfig {  readonly archChoices: ReadonlyArray<BuildArch>;} function normalizeWindowsArch(value: string | undefined): BuildArch | undefined {  const normalized = value?.trim().toLowerCase();  if (!normalized) return undefined;  if (normalized.includes("arm64") || normalized === "aarch64") return "arm64";  if (normalized.includes("amd64") || normalized.includes("x64")) return "x64";  return undefined;} export function resolveHostProcessArch(  platform: NodeJS.Platform,  processArch: NodeJS.Architecture,  env: NodeJS.ProcessEnv,): BuildArch | undefined {  if (processArch === "arm64") return "arm64";  if (processArch === "x64") {    if (platform !== "win32") return "x64";     // On Windows-on-Arm, x64 Node/Bun can run under emulation while the host    // still reports ARM64 via the processor environment variables.    return (      normalizeWindowsArch(env.PROCESSOR_ARCHITEW6432) ??      normalizeWindowsArch(env.PROCESSOR_ARCHITECTURE) ??      "x64"    );  }  return undefined;} export function getDefaultBuildArch(  platform: BuildPlatform,  processArch: NodeJS.Architecture,  env: NodeJS.ProcessEnv,  platformConfig: PlatformConfig,): BuildArch {  const hostPlatform: NodeJS.Platform =    platform === "win" ? "win32" : platform === "mac" ? "darwin" : "linux";  const hostArch = resolveHostProcessArch(hostPlatform, processArch, env);  if (hostArch && platformConfig.archChoices.includes(hostArch)) {    return hostArch;  }   return platformConfig.archChoices[0] ?? "x64";}