fix: preserve CLIProxy platform arch compatibility

src/cliproxy/binary/platform-detector.ts

@@ -2,7 +2,7 @@
  * Platform Detector for CLIProxyAPI Binary Downloads
  *
  * Detects OS and architecture to determine correct binary asset.
- * Supports 6 platforms: darwin/linux/windows x amd64/aarch64
+ * Supports 6 platforms: darwin/linux/windows x amd64/arm64
  */
 
 import {
@@ -64,9 +64,7 @@ export const CLIPROXY_FAULTY_RANGE = { min: '6.6.81-0', max: '6.6.88-0' };
 /** @deprecated Use CLIPROXY_FALLBACK_VERSION instead */
 export const CLIPROXY_VERSION = CLIPROXY_FALLBACK_VERSION;
 
-/**
- * Platform mapping from Node.js values to CLIProxyAPI naming
- */
+/** Platform mapping from Node.js values to CCS public architecture labels. */
 const OS_MAP: Record<string, SupportedOS | undefined> = {
   darwin: 'darwin',
   linux: 'linux',
@@ -75,11 +73,19 @@ const OS_MAP: Record<string, SupportedOS | undefined> = {
 
 const ARCH_MAP: Record<string, SupportedArch | undefined> = {
   x64: 'amd64',
+  arm64: 'arm64',
+};
+
+/** CLIProxy release assets use aarch64 while Node.js reports arm64. */
+const RELEASE_ARCH_MAP: Record<SupportedArch, SupportedArch> = {
+  amd64: 'amd64',
   arm64: 'aarch64',
+  aarch64: 'aarch64',
 };
 
 export function mapNodeArchToReleaseArch(nodeArch: string): SupportedArch | undefined {
-  return ARCH_MAP[nodeArch];
+  const arch = ARCH_MAP[nodeArch];
+  return arch ? RELEASE_ARCH_MAP[arch] : undefined;
 }
 
 /**
@@ -96,7 +102,8 @@ export function detectPlatform(
   const nodeArch = process.arch;
 
   const os = OS_MAP[nodePlatform];
-  const arch = mapNodeArchToReleaseArch(nodeArch);
+  const arch = ARCH_MAP[nodeArch];
+  const releaseArch = mapNodeArchToReleaseArch(nodeArch);
 
   if (!os) {
     throw new Error(
@@ -105,7 +112,7 @@ export function detectPlatform(
     );
   }
 
-  if (!arch) {
+  if (!arch || !releaseArch) {
     throw new Error(
       `Unsupported CPU architecture: ${nodeArch}\n` + `Supported: x64 (amd64), arm64 (aarch64)`
     );
@@ -114,7 +121,7 @@ export function detectPlatform(
   const config = BACKEND_CONFIG[backend];
   const ver = version || config.fallbackVersion;
   const extension: ArchiveExtension = os === 'windows' ? 'zip' : 'tar.gz';
-  const binaryName = `${config.binaryPrefix}_${ver}_${os}_${arch}.${extension}`;
+  const binaryName = `${config.binaryPrefix}_${ver}_${os}_${releaseArch}.${extension}`;
 
   return {
     os,
@@ -206,7 +213,8 @@ export function getPlatformDescription(): string {
     const platform = detectPlatform();
     const osName =
       platform.os === 'darwin' ? 'macOS' : platform.os === 'linux' ? 'Linux' : 'Windows';
-    const archName = platform.arch === 'aarch64' ? 'ARM64' : platform.arch;
+    const archName =
+      platform.arch === 'arm64' || platform.arch === 'aarch64' ? 'ARM64' : platform.arch;
     return `${osName} ${archName}`;
   } catch {
     return `${process.platform} ${process.arch} (unsupported)`;

src/cliproxy/config/__tests__/backend-selection.test.js

@@ -9,6 +9,21 @@ describe('Backend Selection', () => {
   const platformDetector = require('../../../../dist/cliproxy/binary/platform-detector');
   const types = require('../../../../dist/cliproxy/types');
 
+  function withMockedProcessPlatform(platform, arch, callback) {
+    const originalPlatform = Object.getOwnPropertyDescriptor(process, 'platform');
+    const originalArch = Object.getOwnPropertyDescriptor(process, 'arch');
+
+    Object.defineProperty(process, 'platform', { value: platform, configurable: true });
+    Object.defineProperty(process, 'arch', { value: arch, configurable: true });
+
+    try {
+      callback();
+    } finally {
+      Object.defineProperty(process, 'platform', originalPlatform);
+      Object.defineProperty(process, 'arch', originalArch);
+    }
+  }
+
   describe('BACKEND_CONFIG', () => {
     it('has correct configuration for original backend', () => {
       const config = platformDetector.BACKEND_CONFIG.original;
@@ -39,6 +54,19 @@ describe('Backend Selection', () => {
       assert.strictEqual(platformDetector.mapNodeArchToReleaseArch('x64'), 'amd64');
     });
 
+    it('keeps public ARM64 arch compatibility while using aarch64 release assets', () => {
+      withMockedProcessPlatform('darwin', 'arm64', () => {
+        const info = platformDetector.detectPlatform('6.10.4', 'original');
+
+        assert.strictEqual(info.arch, 'arm64');
+        assert.strictEqual(info.binaryName, 'CLIProxyAPI_6.10.4_darwin_aarch64.tar.gz');
+        assert.strictEqual(
+          platformDetector.getDownloadUrl('6.10.4', 'original'),
+          'https://github.com/router-for-me/CLIProxyAPI/releases/download/v6.10.4/CLIProxyAPI_6.10.4_darwin_aarch64.tar.gz'
+        );
+      });
+    });
+
     it('generates correct binary name for original backend', () => {
       const info = platformDetector.detectPlatform('6.6.51', 'original');
       assert(info.binaryName.startsWith('CLIProxyAPI_6.6.51_'));

src/cliproxy/types/__tests__/types-backward-compat.test.ts

@@ -34,8 +34,8 @@ import { PLUS_ONLY_PROVIDERS } from '../../types';
 describe('types.ts backward compatibility', () => {
   it('exports all platform types', () => {
     const os: SupportedOS = 'darwin';
-    const arch: SupportedArch = 'aarch64';
-    const nodeArch: SupportedArch = 'arm64';
+    const arch: SupportedArch = 'arm64';
+    const releaseArch: SupportedArch = 'aarch64';
     const ext: ArchiveExtension = 'tar.gz';
     const info: PlatformInfo = {
       os,
@@ -44,8 +44,8 @@ describe('types.ts backward compatibility', () => {
       extension: ext,
     };
     expect(info.os).toBe('darwin');
-    expect(info.arch).toBe('aarch64');
-    expect(nodeArch).toBe('arm64');
+    expect(info.arch).toBe('arm64');
+    expect(releaseArch).toBe('aarch64');
   });
 
   it('exports all binary types', () => {