| protocol-message:cohere-content-delta | Cohere chat-stream / content-delta | extensions |
| protocol-message:cohere-content-end | Cohere chat-stream / content-end | extensions |
| protocol-message:cohere-content-start | Cohere chat-stream / content-start | extensions |
| protocol-message:cohere-message-end | Cohere chat-stream / message-end | extensions |
| protocol-message:cohere-message-start | Cohere chat-stream / message-start | extensions |
| protocol-message:cohere-tool-call-delta | Cohere chat-stream / tool-call-delta | extensions |
| protocol-message:cohere-tool-call-end | Cohere chat-stream / tool-call-end | extensions |
| protocol-message:cohere-tool-call-start | Cohere chat-stream / tool-call-start | extensions |
| protocol-message:mistral-stream-chunk | Mistral chat / stream chunk | extensions |
| protocol-message:mistral-stream-done | Mistral chat / stream [DONE] sentinel | extensions |
| protocol-message:ollama-chat-stream-chunk | Ollama /api/chat — streaming chunk | extensions |
| protocol-message:ollama-chat-stream-done | Ollama /api/chat — streaming terminal | extensions |
| protocol-message:ollama-generate-stream-chunk | Ollama /api/generate — streaming chunk | extensions |
| protocol-message:openai-response-completed | OpenAI Responses / response.completed | extensions |
| protocol-message:openai-response-created | OpenAI Responses / response.created | extensions |
| protocol-message:openai-response-failed | OpenAI Responses / response.failed | extensions |
| protocol-message:openai-response-output-item-added | OpenAI Responses / response.output_item.added | extensions |
| protocol-message:openai-response-output-text-delta | OpenAI Responses / response.output_text.delta | extensions |
| protocol-message:stream-event | SDKMessage / StreamEvent | extensions |