Run OciGenAiConfig models in the AutoGen, Agent Framework and OpenAI Agents adapters (OpenAI-compatible API) #263

Description

OciGenAiConfig is only executable by the WayFlow and LangGraph adapters. The adapters built on the openai SDK (AutoGen, Microsoft Agent Framework, OpenAI Agents) reject it:

NotImplementedError: LlmConfig with api_provider='oci' is not supported in autogen yet. Consider using a specific LlmConfig subclass instead.

(same message in agent_framework and openaiagents), so an Agent Spec configuration that uses OCI Generative AI is not portable across the supported runtimes.

Proposal

OCI Generative AI exposes OpenAI-compatible chat/completions and responses endpoints under <service_endpoint>/openai/v1, authenticated with an OCI request signature and an opc-compartment-id header. The three adapters can execute OciGenAiConfig by giving their OpenAI clients a signing httpx client built from the OciClientConfig (the four authentication types map onto the httpx.Auth implementations of the oci-openai package), with the compartment header, and by mapping api_type to chat completions or the Responses API where the runtime supports it. The runtime-to-Agent-Spec converters should rebuild the OciGenAiConfig from such clients.

Known limits of that API to handle explicitly: Cohere models and the DEDICATED serving mode are not served; the Responses API needs OpenAI models or a conversation store; the endpoint negotiates zstd and compresses streamed chunks as independent frames that httpx cannot decode (gzip works).

Environment

• pyagentspec main (26.4.0.dev0), autogen-core 0.7.4, agent-framework-core 1.13.0, openai-agents 0.19.4