feat: upgrade Copilot SDK and agent selection flow

AGENTS.md

@@ -36,6 +36,7 @@ Pre-commit hooks (husky) run lint-staged (Prettier) and `npm test` automatically
 - Preserve existing formatting in touched files unless a formatting change is required for correctness.
 - Never run project-wide formatting as part of a feature/fix unless the user explicitly requests it.
 - If formatting is required, scope it to the smallest possible set of changed lines/files.
+- Preserve each file's existing line ending style (LF vs CRLF) and never introduce EOL-only churn.
 
 ## Release & Versioning
 

src/main/agents.test.ts

@@ -124,30 +124,22 @@ mode: gpt-4.5
     expect(result.agents).toEqual([]);
   });
 
-  it('should find gemini and codex agent files', async () => {
+  it('should find gemini agent file', async () => {
     mocks.existsSync.mockImplementation((path: string) => {
       const normalized = normalizePath(path);
-      return (
-        normalized === '/tmp/test-home/.gemini/GEMINI.md' ||
-        normalized === '/tmp/test-home/.codex/AGENTS.md'
-      );
+      return normalized === '/tmp/test-home/.gemini/GEMINI.md';
     });
     mocks.stat.mockResolvedValue({ isFile: () => true });
-    mocks.readFile.mockImplementation((path: string) => {
-      if (normalizePath(path).includes('/.gemini/')) {
-        return Promise.resolve(`---
-name: gemini-agent
----`);
-      }
+    mocks.readFile.mockImplementation(() => {
       return Promise.resolve(`---
-name: codex-agent
+name: gemini-agent
 ---`);
     });
 
     const result = await getAllAgents();
 
-    expect(result.agents.length).toBe(2);
-    const sources = result.agents.map((agent) => agent.source).sort();
-    expect(sources).toEqual(['codex', 'gemini']);
+    expect(result.agents.length).toBe(1);
+    const sources = result.agents.map((agent) => agent.source);
+    expect(sources).toEqual(['gemini']);
   });
 });

src/main/agents.ts

@@ -278,7 +278,6 @@ export async function getAllAgents(projectRoot?: string, cwd?: string): Promise<
 
   const personalFiles = [
     { path: join(homePath, '.gemini', 'GEMINI.md'), source: 'gemini' as const },
-    { path: join(homePath, '.codex', 'AGENTS.md'), source: 'codex' as const },
   ];
 
   for (const { path, source } of personalFiles) {
@@ -295,8 +294,6 @@ export async function getAllAgents(projectRoot?: string, cwd?: string): Promise<
     for (const { path, source } of projectDirs) {
       addResults(await scanAgentsDirectory(path, 'project', source));
     }
-
-    addResults(await scanAgentFile(join(projectRoot, 'AGENTS.md'), 'project', 'codex'));
   }
 
   if (cwd && cwd !== projectRoot) {
@@ -309,8 +306,6 @@ export async function getAllAgents(projectRoot?: string, cwd?: string): Promise<
     for (const { path, source } of cwdDirs) {
       addResults(await scanAgentsDirectory(path, 'project', source));
     }
-
-    addResults(await scanAgentFile(join(cwd, 'AGENTS.md'), 'project', 'codex'));
   }
 
   return { agents, errors };