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Alem Tuzlak
355681cd3a
`@ag-ui/langgraph`'s message converter handles only user/assistant/system/tool
roles and throws `"message role is not supported."` on anything else. Agents
that stream reasoning summaries (OpenAI Responses API + `reasoning={summary:
"detailed"}`) emit AG-UI messages with `role: "reasoning"` that the AG-UI
client replays in the next turn's `input.messages`; the converter then crashes
before the model is ever called and the second pill click in a multi-turn
thread produces an `INCOMPLETE_STREAM` error.
Strip `role: "reasoning"` from `input.messages` inside CopilotKit's
LangGraphAgent.run subclass before delegating to super. This is the narrowest
fix at the runtime/AG-UI boundary — only the inbound message list is filtered,
the outbound event stream still carries reasoning summaries to the client, so
the `<ReasoningBlock>` slot continues to render on the active turn.