Fix Antigravity OAuth client discovery

CHANGELOG.md

@@ -8,6 +8,7 @@
 - Localizations: add Spanish and Catalan language packs and fill missing localization keys (#1041). Thanks @seifreed!
 
 ### Fixed
+- Antigravity: discover OAuth credentials from the bundled extension language server in newer IDE builds so Add Account works again (#1076). Thanks @xARSENICx!
 - Menu bar: wait for display changes to settle before recovering status items and retry if macOS still leaves the icon detached (#1074). Thanks @yipjunkai!
 - Menu: keep lower action rows stable when Refresh is highlighted or pressed (#1071). Thanks @MadanChaollaPark!
 - Linux CLI: avoid linking JetBrains provider parsing against `libxml2.so.2`, improving compatibility with newer distros that ship libxml2 2.15+ (#1046). Thanks @semsemyonoff!

Sources/CodexBarCore/Providers/Antigravity/AntigravityOAuthCredentialsStore.swift

@@ -184,6 +184,9 @@ public enum AntigravityOAuthConfig {
             applicationRoots: applicationRoots,
             fileManager: fileManager)
         let relativePaths = [
+            "Contents/Resources/app/extensions/antigravity/bin/language_server_macos_arm",
+            "Contents/Resources/app/extensions/antigravity/bin/language_server_macos_x64",
+            "Contents/Resources/app/extensions/antigravity/bin/language_server_macos",
             "Contents/Resources/app/out/main.js",
             "Contents/Resources/bin/language_server",
             "Contents/Resources/bin/language_server_macos",

Tests/CodexBarTests/AntigravityOAuthCredentialsStoreTests.swift

@@ -57,6 +57,45 @@ struct AntigravityOAuthCredentialsStoreTests {
                 applicationRoots: [root]) == standaloneClient)
     }
 
+    @Test
+    func `oauth client discovery reads antigravity extension language server`() throws {
+        let root = FileManager.default.temporaryDirectory
+            .appendingPathComponent(UUID().uuidString, isDirectory: true)
+        defer { try? FileManager.default.removeItem(at: root) }
+
+        let extensionClient = AntigravityOAuthClient(
+            clientID: self.googleClientID("extension"),
+            clientSecret: self.googleClientSecret(repeating: "d"))
+        let staleClient = AntigravityOAuthClient(
+            clientID: self.googleClientID("stale"),
+            clientSecret: self.googleClientSecret(repeating: "e"))
+        try self.writeAntigravityApp(
+            named: "Antigravity IDE.app",
+            under: root,
+            bundleIdentifier: "com.google.antigravity-ide",
+            artifactRelativePath: "Contents/Resources/app/out/main.js",
+            artifactData: Data("""
+            out-build/vs/platform/cloudCode/common/oauthClient.js
+            clientId="\(staleClient.clientID)";
+            clientSecret="\(staleClient.clientSecret)";
+            """.utf8))
+        var artifactData = Data([0xFF])
+        artifactData.append(Data(
+            """
+            \u{0}\(extensionClient.clientSecret)\u{0}oauth_data\u{0}\(extensionClient.clientID)\u{0}
+            """.utf8))
+        try self.writeAntigravityApp(
+            named: "Antigravity IDE.app",
+            under: root,
+            bundleIdentifier: "com.google.antigravity-ide",
+            artifactRelativePath: "Contents/Resources/app/extensions/antigravity/bin/language_server_macos_arm",
+            artifactData: artifactData)
+
+        #expect(
+            AntigravityOAuthConfig.discoverClientFromInstalledApp(
+                applicationRoots: [root]) == extensionClient)
+    }
+
     @Test
     func `oauth client discovery pairs lone binary secret with trailing client id`() throws {
         let root = FileManager.default.temporaryDirectory