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')
+})