sessionKey: "main",

});

await gateway.request("talk.client.toolCall", { sessionKey, callId, name, args });

await gateway.request("talk.client.steer", { sessionKey, text, mode: "steer" });

```

Browser-owned WebRTC/provider-websocket sessions use `talk.client.create`,

| `talk.session.cancelTurn` | all Gateway-owned sessions | Cancel active capture/provider/agent/TTS work for a turn. |

| `talk.session.cancelOutput` | `realtime/gateway-relay` | Stop assistant audio output without necessarily ending the user turn. |

| `talk.session.submitToolResult` | `realtime/gateway-relay` | Complete a provider tool call emitted by the relay; pass `options.willContinue` for interim output or `options.suppressResponse` to satisfy the call without another assistant response. |

| `talk.session.steer` | agent-backed Talk sessions | Send spoken `status`, `steer`, `cancel`, or `followup` control to the active embedded run resolved from the Talk session. |

| `talk.session.close` | all unified sessions | Stop relay sessions or revoke managed-room state, then forget the unified session id. |

Do not introduce provider or platform special cases in core to make this work.

| `plugin-sdk/speech` | Speech helpers | Speech provider types plus provider-facing directive, registry, validation helpers, and OpenAI-compatible TTS builder |

| `plugin-sdk/speech-core` | Shared speech core | Speech provider types, registry, directives, normalization |

| `plugin-sdk/realtime-transcription` | Realtime transcription helpers | Provider types, registry helpers, and shared WebSocket session helper |

| `plugin-sdk/realtime-voice` | Realtime voice helpers | Provider types, registry/resolution helpers, bridge session helpers, shared agent talk-back queues, transcript/event health, echo suppression, and fast context consult helpers |

| `plugin-sdk/realtime-voice` | Realtime voice helpers | Provider types, registry/resolution helpers, bridge session helpers, shared agent talk-back queues, active-run voice control, transcript/event health, echo suppression, and fast context consult helpers |

| `plugin-sdk/image-generation` | Image-generation helpers | Image generation provider types plus image asset/data URL helpers and the OpenAI-compatible image provider builder |

| `plugin-sdk/image-generation-core` | Shared image-generation core | Image-generation types, failover, auth, and registry helpers |

| `plugin-sdk/music-generation` | Music-generation helpers | Music-generation provider/request/result types |