feat(core): Enable generalist agent (#19665)

packages/core/src/agents/generalist-agent.ts

@@ -24,8 +24,7 @@ export const GeneralistAgent = (
   name: 'generalist',
   displayName: 'Generalist Agent',
   description:
-    "A general-purpose AI agent with access to all tools. Use it for complex tasks that don't fit into other specialized agents.",
-  experimental: true,
+    'A general-purpose AI agent with access to all tools. Highly recommended for tasks that are turn-intensive or involve processing large amounts of data. Use this to keep the main session history lean and efficient. Excellent for: batch refactoring/error fixing across multiple files, running commands with high-volume output, and speculative investigations.',
   inputConfig: {
     inputSchema: {
       type: 'object',

packages/core/src/agents/registry.test.ts

@@ -50,6 +50,7 @@ function makeMockedConfig(params?: Partial<ConfigParameters>): Config {
   } as unknown as ToolRegistry);
   vi.spyOn(config, 'getAgentRegistry').mockReturnValue({
     getDirectoryContext: () => 'mock directory context',
+    getAllDefinitions: () => [],
   } as unknown as AgentRegistry);
   return config;
 }
@@ -262,6 +263,7 @@ describe('AgentRegistry', () => {
           overrides: {
             codebase_investigator: { enabled: false },
             cli_help: { enabled: false },
+            generalist: { enabled: false },
           },
         },
       });
@@ -299,13 +301,13 @@ describe('AgentRegistry', () => {
       expect(registry.getDefinition('cli_help')).toBeUndefined();
     });
 
-    it('should NOT register generalist agent by default (because it is experimental)', async () => {
+    it('should register generalist agent by default', async () => {
       const config = makeMockedConfig();
       const registry = new TestableAgentRegistry(config);
 
       await registry.initialize();
 
-      expect(registry.getDefinition('generalist')).toBeUndefined();
+      expect(registry.getDefinition('generalist')).toBeDefined();
     });
 
     it('should register generalist agent if explicitly enabled via override', async () => {