feat: add support for GitHub Models provider

- Introduced environment variable CLAUDE_CODE_USE_GITHUB to enable GitHub Models.
- Added checks for GITHUB_TOKEN or GH_TOKEN for authentication.
- Updated base URL handling to include GitHub Models default.
- Enhanced provider detection and error handling for GitHub Models.
- Updated relevant functions and components to accommodate the new provider.

src/utils/model/providers.test.ts

@@ -7,6 +7,7 @@ import {
 
 const originalEnv = {
   CLAUDE_CODE_USE_GEMINI: process.env.CLAUDE_CODE_USE_GEMINI,
+  CLAUDE_CODE_USE_GITHUB: process.env.CLAUDE_CODE_USE_GITHUB,
   CLAUDE_CODE_USE_OPENAI: process.env.CLAUDE_CODE_USE_OPENAI,
   CLAUDE_CODE_USE_BEDROCK: process.env.CLAUDE_CODE_USE_BEDROCK,
   CLAUDE_CODE_USE_VERTEX: process.env.CLAUDE_CODE_USE_VERTEX,
@@ -15,6 +16,7 @@ const originalEnv = {
 
 afterEach(() => {
   process.env.CLAUDE_CODE_USE_GEMINI = originalEnv.CLAUDE_CODE_USE_GEMINI
+  process.env.CLAUDE_CODE_USE_GITHUB = originalEnv.CLAUDE_CODE_USE_GITHUB
   process.env.CLAUDE_CODE_USE_OPENAI = originalEnv.CLAUDE_CODE_USE_OPENAI
   process.env.CLAUDE_CODE_USE_BEDROCK = originalEnv.CLAUDE_CODE_USE_BEDROCK
   process.env.CLAUDE_CODE_USE_VERTEX = originalEnv.CLAUDE_CODE_USE_VERTEX
@@ -23,6 +25,7 @@ afterEach(() => {
 
 function clearProviderEnv(): void {
   delete process.env.CLAUDE_CODE_USE_GEMINI
+  delete process.env.CLAUDE_CODE_USE_GITHUB
   delete process.env.CLAUDE_CODE_USE_OPENAI
   delete process.env.CLAUDE_CODE_USE_BEDROCK
   delete process.env.CLAUDE_CODE_USE_VERTEX
@@ -38,6 +41,7 @@ test('first-party provider keeps Anthropic account setup flow enabled', () => {
 
 test.each([
   ['CLAUDE_CODE_USE_OPENAI', 'openai'],
+  ['CLAUDE_CODE_USE_GITHUB', 'github'],
   ['CLAUDE_CODE_USE_GEMINI', 'gemini'],
   ['CLAUDE_CODE_USE_BEDROCK', 'bedrock'],
   ['CLAUDE_CODE_USE_VERTEX', 'vertex'],
@@ -52,3 +56,11 @@ test.each([
     expect(usesAnthropicAccountFlow()).toBe(false)
   },
 )
+
+test('GEMINI takes precedence over GitHub when both are set', () => {
+  clearProviderEnv()
+  process.env.CLAUDE_CODE_USE_GEMINI = '1'
+  process.env.CLAUDE_CODE_USE_GITHUB = '1'
+
+  expect(getAPIProvider()).toBe('gemini')
+})

src/utils/model/providers.ts

@@ -1,20 +1,29 @@
 import type { AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS } from '../../services/analytics/index.js'
 import { isEnvTruthy } from '../envUtils.js'
 
-export type APIProvider = 'firstParty' | 'bedrock' | 'vertex' | 'foundry' | 'openai' | 'gemini'
+export type APIProvider =
+  | 'firstParty'
+  | 'bedrock'
+  | 'vertex'
+  | 'foundry'
+  | 'openai'
+  | 'gemini'
+  | 'github'
 
 export function getAPIProvider(): APIProvider {
   return isEnvTruthy(process.env.CLAUDE_CODE_USE_GEMINI)
     ? 'gemini'
-    : isEnvTruthy(process.env.CLAUDE_CODE_USE_OPENAI)
-      ? 'openai'
-      : isEnvTruthy(process.env.CLAUDE_CODE_USE_BEDROCK)
-        ? 'bedrock'
-        : isEnvTruthy(process.env.CLAUDE_CODE_USE_VERTEX)
-          ? 'vertex'
-          : isEnvTruthy(process.env.CLAUDE_CODE_USE_FOUNDRY)
-            ? 'foundry'
-            : 'firstParty'
+    : isEnvTruthy(process.env.CLAUDE_CODE_USE_GITHUB)
+      ? 'github'
+      : isEnvTruthy(process.env.CLAUDE_CODE_USE_OPENAI)
+        ? 'openai'
+        : isEnvTruthy(process.env.CLAUDE_CODE_USE_BEDROCK)
+          ? 'bedrock'
+          : isEnvTruthy(process.env.CLAUDE_CODE_USE_VERTEX)
+            ? 'vertex'
+            : isEnvTruthy(process.env.CLAUDE_CODE_USE_FOUNDRY)
+              ? 'foundry'
+              : 'firstParty'
 }
 
 export function usesAnthropicAccountFlow(): boolean {