fix(proxy): ignore legacy singleton session file

src/proxy/proxy-daemon-state.ts

@@ -108,10 +108,18 @@ export function listOpenAICompatProxyProfileNames(): string[] {
     const entries = fs.readdirSync(getOpenAICompatProxyDir(), { withFileTypes: true });
     const profileKeys = new Set<string>();
     for (const entry of entries) {
-      if (!entry.isFile() || !entry.name.endsWith('.session.json')) {
+      if (
+        !entry.isFile() ||
+        entry.name === 'session.json' ||
+        !entry.name.endsWith('.session.json')
+      ) {
         continue;
       }
-      profileKeys.add(entry.name.slice(0, -'.session.json'.length));
+      const profileKey = entry.name.slice(0, -'.session.json'.length);
+      if (!profileKey) {
+        continue;
+      }
+      profileKeys.add(profileKey);
     }
     return [...profileKeys].map((profileKey) => decodeURIComponent(profileKey));
   } catch {

tests/unit/proxy/proxy-daemon-state.test.ts

@@ -0,0 +1,37 @@
+import { afterEach, beforeEach, describe, expect, it } from 'bun:test';
+import * as fs from 'fs';
+import * as os from 'os';
+import * as path from 'path';
+import {
+  getLegacyOpenAICompatProxySessionPath,
+  getOpenAICompatProxySessionPath,
+} from '../../../src/proxy/proxy-daemon-paths';
+import { listOpenAICompatProxyProfileNames } from '../../../src/proxy/proxy-daemon-state';
+
+let originalCcsHome: string | undefined;
+let tempDir: string;
+
+beforeEach(() => {
+  originalCcsHome = process.env.CCS_HOME;
+  tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'ccs-proxy-state-'));
+  process.env.CCS_HOME = tempDir;
+});
+
+afterEach(() => {
+  if (originalCcsHome !== undefined) {
+    process.env.CCS_HOME = originalCcsHome;
+  } else {
+    delete process.env.CCS_HOME;
+  }
+  fs.rmSync(tempDir, { recursive: true, force: true });
+});
+
+describe('listOpenAICompatProxyProfileNames', () => {
+  it('ignores the legacy singleton session file', () => {
+    fs.mkdirSync(path.dirname(getLegacyOpenAICompatProxySessionPath()), { recursive: true });
+    fs.writeFileSync(getLegacyOpenAICompatProxySessionPath(), '{}\n', 'utf8');
+    fs.writeFileSync(getOpenAICompatProxySessionPath('ccg'), '{}\n', 'utf8');
+
+    expect(listOpenAICompatProxyProfileNames()).toEqual(['ccg']);
+  });
+});