Provider Runtime Contracts#
This checked reference is generated directly from src/supafone_labs/runtime/provider_contracts.py. Adapter support means the SDK can parse events and compile the documented action; it does not mean Supafone hosts that provider. The managed Agent Factory runtime is listed separately from BYOK and developer-owned delivery.
| Provider | Mode | Native message | Acceptance | Verified |
|---|---|---|---|---|
| Supafone Agent Factory | native_message | user_text_message | Ultravox data-message REST returns HTTP 204 or the live socket remains healthy. | 2026-07-12 (provider docs) |
| Ultravox | native_message | user_text_message | Send Data Message returns HTTP 204; deferred guidance uses urgency=later. | 2026-07-12 (provider docs) |
| Vapi | native_message | add-message | POST to the live call controlUrl succeeds and the system message enters model context. | 2026-07-12 (provider docs) |
| Retell | custom_llm_context | system context entry | The custom-LLM context includes the entry before the next response event is emitted. | 2026-07-12 (provider docs) |
| Bland | tap_only | No universal injection message | Not applicable: current public APIs expose observation and call control, not prompt injection. | 2026-07-12 (provider docs) |
| OpenAI Realtime | native_message | conversation.item.create | Server emits conversation.item.created/done or an error tied to the client event. | 2026-07-12 (provider docs) |
| Grok Voice Agent | native_message | response.create.instructions | Server emits response.created followed by response.done, or an error. | 2026-07-12 (provider docs) |
| Gemini Developer Live | tap_only | clientContent user turn (ordinary conversation context) | Not applicable: the default adapter observes events and emits no hidden mid-call control. | 2026-08-20 (provider docs) |
| ElevenLabs Agents | native_message | contextual_update | No direct ack is defined; the socket must remain healthy and the next turn must complete. | 2026-07-12 (provider docs) |
| Deepgram Voice Agent | native_message | UpdatePrompt | Server emits PromptUpdated; malformed updates emit Error or Warning. | 2026-07-12 (provider docs) |
| LiveKit Agents | framework_context | ChatContext.add_message | Agent.update_chat_ctx completes and the persisted context contains the system entry. | 2026-07-12 (provider docs) |
| Pipecat | framework_context | LLMMessagesAppendFrame | The context aggregator consumes the frame and retains the developer message. | 2026-07-12 (provider docs) |
| Cartesia Line | requires_agent_hook | custom event | Default adapter remains tap-only; a Line agent must explicitly handle UserCustomSent. | 2026-07-12 (provider docs) |
| Inworld Realtime | native_message | conversation.item.create | Server emits conversation.item.added/done or an error. | 2026-07-12 (provider docs) |
Generated contract source SHA-256: d0d4f841062d2af626177a66211ad2dfe0b813f9839283d3503c8b2b66827432