feat(a2a): add robust A2A V0 support, gRPC transport, and config validation

packages/a2a-server/src/config/config.test.ts

@@ -316,6 +316,35 @@ describe('loadConfig', () => {
       );
     });
 
+    it('should pass agent settings to Config', async () => {
+      const settings: Settings = {
+        experimental: {
+          enableAgents: false,
+        },
+        agents: {
+          overrides: {
+            test_agent: { enabled: true },
+          },
+        },
+      };
+      await loadConfig(settings, mockExtensionLoader, taskId);
+      expect(Config).toHaveBeenCalledWith(
+        expect.objectContaining({
+          enableAgents: false,
+          agents: settings.agents,
+        }),
+      );
+    });
+
+    it('should default enableAgents to true if not specified', async () => {
+      await loadConfig(mockSettings, mockExtensionLoader, taskId);
+      expect(Config).toHaveBeenCalledWith(
+        expect.objectContaining({
+          enableAgents: true,
+        }),
+      );
+    });
+
     describe('interactivity', () => {
       it('should set interactive true when not headless', async () => {
         vi.mocked(isHeadlessMode).mockReturnValue(false);

packages/a2a-server/src/config/config.ts

@@ -109,6 +109,8 @@ export async function loadConfig(
     interactive: !isHeadlessMode(),
     enableInteractiveShell: !isHeadlessMode(),
     ptyInfo: 'auto',
+    enableAgents: settings.experimental?.enableAgents ?? true,
+    agents: settings.agents,
   };
 
   const fileService = new FileDiscoveryService(workspaceDir, {

packages/a2a-server/src/config/settings.test.ts

@@ -112,6 +112,24 @@ describe('loadSettings', () => {
     expect(result.fileFiltering?.respectGitIgnore).toBe(true);
   });
 
+  it('should load experimental and agents settings correctly', () => {
+    const settings = {
+      experimental: {
+        enableAgents: true,
+      },
+      agents: {
+        overrides: {
+          test_agent: { enabled: false },
+        },
+      },
+    };
+    fs.writeFileSync(USER_SETTINGS_PATH, JSON.stringify(settings));
+
+    const result = loadSettings(mockWorkspaceDir);
+    expect(result.experimental?.enableAgents).toBe(true);
+    expect(result.agents?.overrides?.['test_agent']?.enabled).toBe(false);
+  });
+
   it('should overwrite top-level settings from workspace (shallow merge)', () => {
     const userSettings = {
       showMemoryUsage: false,

packages/a2a-server/src/config/settings.ts

@@ -14,6 +14,7 @@ import {
   getErrorMessage,
   type TelemetrySettings,
   homedir,
+  type AgentSettings,
 } from '@google/gemini-cli-core';
 import stripJsonComments from 'strip-json-comments';
 
@@ -45,6 +46,10 @@ export interface Settings {
     enableRecursiveFileSearch?: boolean;
     customIgnoreFilePaths?: string[];
   };
+  experimental?: {
+    enableAgents?: boolean;
+  };
+  agents?: AgentSettings;
 }
 
 export interface SettingsError {