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# Plugins

> No-op plugin stubs and inference classes for LiveKit API compatibility.

[agentsession]: /docs/server-sdks/reference/typescript/agents/livewire/agent-session

LiveWire provides stub classes under the `plugins` and `inference` namespaces that
mirror popular livekit-agents plugin constructors so that existing code compiles
unchanged. On SignalWire, the platform handles all STT, TTS, LLM, and VAD
infrastructure automatically. These classes are no-ops that log an informational
message once on first instantiation.

> **Note**
>
> You do not need to install Deepgram, Cartesia, ElevenLabs, Silero, or any other
> provider SDK. SignalWire manages the entire AI pipeline in its control plane.
> These stubs exist solely so that imports and constructor calls from existing
> livekit-agents code do not raise errors.

## **STT Plugins**

### plugins.DeepgramSTT

Stub for the LiveKit Deepgram STT plugin.

```typescript {3}
import { plugins } from '@signalwire/sdk/livewire';

const stt = new plugins.DeepgramSTT({ model: 'nova-2' });
// No-op: SignalWire handles speech recognition automatically
```

Accepts arbitrary constructor arguments for API compatibility. All are ignored.

---

## **LLM Plugins**

### plugins.OpenAILLM

Stub for the LiveKit OpenAI LLM plugin. The constructor accepts arbitrary options
for API compatibility.

```typescript {3}
import { plugins } from '@signalwire/sdk/livewire';

const llm = new plugins.OpenAILLM({ model: 'gpt-4o' });
```

All constructor arguments are accepted for API compatibility. To set the LLM model
on the SignalWire agent, pass the model string to the
[`AgentSession`][agentsession] constructor's `llm` option instead.

---

## **TTS Plugins**

### plugins.CartesiaTTS

Stub for the LiveKit Cartesia TTS plugin.

```typescript {3}
import { plugins } from '@signalwire/sdk/livewire';

const tts = new plugins.CartesiaTTS({ voice: 'some-voice-id' });
// No-op: SignalWire handles text-to-speech automatically
```

Accepts arbitrary constructor arguments for API compatibility. All are ignored.

---

### plugins.ElevenLabsTTS

Stub for the LiveKit ElevenLabs TTS plugin.

```typescript {3}
import { plugins } from '@signalwire/sdk/livewire';

const tts = new plugins.ElevenLabsTTS({ voiceId: 'some-voice-id' });
// No-op: SignalWire handles text-to-speech automatically
```

Accepts arbitrary constructor arguments for API compatibility. All are ignored.

---

## **VAD Plugins**

### plugins.SileroVAD

Stub for the LiveKit Silero VAD plugin.

```typescript {3}
import { plugins } from '@signalwire/sdk/livewire';

const vad = plugins.SileroVAD.load();
// No-op: SignalWire handles voice activity detection automatically
```

#### load

```typescript {1}
static load(): SileroVAD
```

Static factory method that mirrors `SileroVAD.load()` from the LiveKit SDK.
Returns a new `SileroVAD` instance. Logs an informational no-op message on
first call.

---

## **Inference Stubs**

The `inference` namespace mirrors the `livekit.agents.inference` module. These
classes are available as named exports from the `inference` namespace.

```typescript {3-5}
import { inference } from '@signalwire/sdk/livewire';

const stt = new inference.STT('deepgram/nova-2');
const llm = new inference.LLM('gpt-4o');
const tts = new inference.TTS('cartesia/sonic');
```

### inference.STT

Stub for `livekit.agents.inference.STT`.

```typescript {3}
import { inference } from '@signalwire/sdk/livewire';

const stt = new inference.STT('deepgram/nova-2');
```

> **Note**
>
> No-op. SignalWire's control plane handles speech recognition automatically.

**`model`** `string` — required

Model identifier. Accepted for API compatibility.

---

Accepts an optional second argument for additional options. All are ignored.

---

### inference.LLM

Stub for `livekit.agents.inference.LLM`. This class is a no-op — the constructor
accepts but does not store its arguments. To set the LLM model on the SignalWire
agent, pass a **plain string** (e.g., `'gpt-4o'`) to `AgentSession({ llm })`
instead of an `inference.LLM` instance.

```typescript {3}
import { inference, AgentSession } from '@signalwire/sdk/livewire';

const llm = new inference.LLM('gpt-4o');
const session = new AgentSession({ llm });
```

**`model`** `string` — required

Model identifier. A provider prefix (e.g., `"openai/"`) is stripped automatically
by the session when building the underlying SignalWire agent.

---

Accepts an optional second argument for additional options. All are ignored.

---

### inference.TTS

Stub for `livekit.agents.inference.TTS`.

```typescript {3}
import { inference } from '@signalwire/sdk/livewire';

const tts = new inference.TTS('cartesia/sonic');
```

> **Note**
>
> No-op. SignalWire's control plane handles text-to-speech automatically.

**`model`** `string` — required

Model identifier. Accepted for API compatibility.

---

Accepts an optional second argument for additional options. All are ignored.

> No-op plugin stubs and inference classes for LiveKit API compatibility.