Default to anthropic/claude-3.5-sonnet in code mode

packages/host/app/components/matrix/room.gts

@@ -56,6 +56,8 @@ import { AiAssistantConversation } from '../ai-assistant/message';
 import NewSession from '../ai-assistant/new-session';
 import AiAssistantSkillMenu from '../ai-assistant/skill-menu';
 
+import { Submodes } from '../submode-switcher';
+
 import RoomMessage from './room-message';
 
 import type RoomData from '../../lib/matrix-classes/room';
@@ -239,6 +241,24 @@ export default class Room extends Component<Signature> {
     registerDestructor(this, () => {
       this.scrollState().messageVisibilityObserver.disconnect();
     });
+
+    this.setRoomLLM();
+  }
+
+  private async setRoomLLM() {
+    let isCodeMode =
+      this.operatorModeStateService.state.submode === Submodes.Code;
+
+    if (isCodeMode) {
+      await this.roomResource.loading;
+      let llmModel = 'anthropic/claude-3.5-sonnet';
+      let foundModel = DEFAULT_LLM_LIST.includes(llmModel);
+      if (!foundModel) {
+        throw new Error(`Cannot find LLM model: ${llmModel}`);
+      }
+      await this.roomResource.loading;
+      this.roomResource.activateLLM(llmModel);
+    } // When in interactive mode, the default LLM is used
   }
 
   private scrollState() {

packages/host/tests/acceptance/ai-assistant-test.gts

@@ -326,4 +326,22 @@ module('Acceptance | AI Assistant tests', function (hooks) {
     let roomState = getRoomState('mock_room_1', APP_BOXEL_ACTIVE_LLM, '');
     assert.strictEqual(roomState.model, 'google/gemini-pro-1.5');
   });
+
+  test('defaults to anthropic/claude-3.5-sonnet when in code mode', async function (assert) {
+    await visitOperatorMode({
+      stacks: [
+        [
+          {
+            id: `${testRealmURL}index`,
+            format: 'isolated',
+          },
+        ],
+      ],
+    });
+
+    await click('[data-test-submode-switcher] button');
+    await click('[data-test-boxel-menu-item-text="Code"]');
+    await click('[data-test-open-ai-assistant]');
+    assert.dom('[data-test-llm-select-selected]').hasText('claude-3.5-sonnet');
+  });
 });