version: "1.0.0" name: xb-ai description: >- Integrate generative AI into an XR Blocks app via xb.ai — text and multimodal (image) queries to Gemini or OpenAI, real-time Gemini Live audio/video sessions, and image generation. Use to answer questions, describe what the camera sees, drive conversational agents, or generate content from an XR scene. Covers enableAI(), xb.ai.isAvailable(), xb.ai.query(), startLiveSession(), generate(), and local API-key handling (?key= / keys.json). Always guard calls with isAvailable(); never ship keys in production client code.

xb-ai: Gemini / OpenAI integration

xb.ai (a.k.a. xb.core.ai) wraps Gemini (default) and OpenAI. See templates/6_ai, templates/7_ai_live, and demos/xrpoet.

Setup & keys

const options = new xb.Options();
options.enableAI();
xb.init(options);

For local prototyping, supply a key via the ?key=YOUR_KEY URL parameter or a keys.json ({"gemini": {"apiKey": "…"}}) served next to the app.

[!IMPORTANT]

The ?key=/keys.json paths are for prototyping ONLY. In production, proxy AI calls through

a server you control — never embed a key in client code.

Text & multimodal queries

class Ask extends xb.Script {
  async ask() {
    if (!xb.ai.isAvailable()) return; // always guard
    const res = await xb.ai.query({prompt: 'Write a haiku about dust.'});
    console.log(res.text); // response text
    // Multimodal: text + image parts
    const res2 = await xb.ai.query({
      type: 'multiPart',
      parts: [
        {inlineData: {data: base64Png, mimeType: 'image/png'}},
        {text: 'What do you see?'},
      ],
    });
    console.log(res2.text);
  }
}

Gemini Live (real-time audio/video)

await xb.ai.setLiveCallbacks({
  /* onmessage, onopen, … */
});
const session = await xb.ai.startLiveSession(/* LiveConnectConfig */ {});
xb.ai.sendRealtimeInput({
  /* audio/video chunk */
});
// xb.ai.getLiveSessionStatus(); xb.ai.stopLiveSession();

Capture the scene to feed the model with xb.core.screenshotSynthesizer / xb.core.deviceCamera (passthrough; enable via options.enableCamera()).

Image generation

const result = await xb.ai.generate('a low-poly desert fox', 'image');

Notes

• Choose the model via options.ai (model: 'gemini' | 'openai', per-model options in

`src/ai/AIOptions.ts`).

• xb.ai.isLiveAvailable() gates Live; not all models/keys support it.
• AI data leaves the device for Gemini/OpenAI servers — follow their privacy terms.