refactor(cliproxy): centralize provider capability registry

tests/unit/cliproxy/provider-capabilities.test.ts

@@ -0,0 +1,59 @@
+import { describe, expect, it } from 'bun:test';
+import {
+  CLIPROXY_PROVIDER_IDS,
+  getOAuthCallbackPort,
+  getProviderDisplayName,
+  getProvidersByOAuthFlow,
+  isCLIProxyProvider,
+  mapExternalProviderName,
+} from '../../../src/cliproxy/provider-capabilities';
+
+describe('provider-capabilities', () => {
+  it('keeps canonical provider IDs backward-compatible', () => {
+    expect(CLIPROXY_PROVIDER_IDS).toEqual([
+      'gemini',
+      'codex',
+      'agy',
+      'qwen',
+      'iflow',
+      'kiro',
+      'ghcp',
+      'claude',
+    ]);
+  });
+
+  it('validates provider IDs', () => {
+    expect(isCLIProxyProvider('gemini')).toBe(true);
+    expect(isCLIProxyProvider('ghcp')).toBe(true);
+    expect(isCLIProxyProvider('not-a-provider')).toBe(false);
+    expect(isCLIProxyProvider('Gemini')).toBe(false);
+  });
+
+  it('returns providers by OAuth flow capability', () => {
+    expect(getProvidersByOAuthFlow('device_code')).toEqual(['qwen', 'ghcp']);
+    expect(getProvidersByOAuthFlow('authorization_code')).toEqual([
+      'gemini',
+      'codex',
+      'agy',
+      'iflow',
+      'kiro',
+      'claude',
+    ]);
+  });
+
+  it('maps external provider aliases to canonical IDs', () => {
+    expect(mapExternalProviderName('gemini-cli')).toBe('gemini');
+    expect(mapExternalProviderName('antigravity')).toBe('agy');
+    expect(mapExternalProviderName('codewhisperer')).toBe('kiro');
+    expect(mapExternalProviderName('github-copilot')).toBe('ghcp');
+    expect(mapExternalProviderName('copilot')).toBe('ghcp');
+    expect(mapExternalProviderName('anthropic')).toBe('claude');
+    expect(mapExternalProviderName('unknown-provider')).toBeNull();
+  });
+
+  it('exposes callback port and display name capabilities', () => {
+    expect(getOAuthCallbackPort('qwen')).toBeNull();
+    expect(getOAuthCallbackPort('gemini')).toBe(8085);
+    expect(getProviderDisplayName('agy')).toBe('AntiGravity');
+  });
+});