feat: Implement Helix app with new chat action

packages/backend/src/apps/helix/actions/index.ts

@@ -0,0 +1,3 @@
+import newChat from './new-chat';
+
+export default [newChat];

packages/backend/src/apps/helix/actions/new-chat/index.ts

@@ -0,0 +1,50 @@
+import FormData from 'form-data';
+import defineAction from '../../../../helpers/define-action';
+
+export default defineAction({
+  name: 'New chat',
+  key: 'newChat',
+  description: 'Create a new chat session for Helix AI.',
+  arguments: [
+    {
+      label: 'Input',
+      key: 'input',
+      type: 'string' as const,
+      required: true,
+      description: 'Prompt to start the chat with.',
+      variables: true,
+    },
+  ],
+
+  async run($) {
+    const formData = new FormData();
+    formData.append('input', $.step.parameters.input as string);
+    formData.append('mode', 'inference');
+    formData.append('type', 'text');
+
+    const sessionResponse = await $.http.post('/api/v1/sessions', formData, {
+      headers: {
+        ...formData.getHeaders(),
+      },
+    });
+
+    const sessionId = sessionResponse.data.id;
+
+    let chatGenerated = false;
+
+    while (!chatGenerated) {
+      const response = await $.http.get(`/api/v1/sessions/${sessionId}`);
+
+      const message =
+        response.data.interactions[response.data.interactions.length - 1];
+
+      if (message.creator === 'system' && message.state === 'complete') {
+        $.setActionItem({
+          raw: message,
+        });
+
+        chatGenerated = true;
+      }
+    }
+  },
+});