update

src/agentCore.jl

@@ -228,11 +228,17 @@ function _agentLoop(agent::yiemAgent)
               result = nothing                # reset
             else  # _processMessage() done and no followUp message.
               agent.agentEventSink("_agentLoop 4 agent._state.messages length $(length(agent._state.messages))")
-              result = agent._state.messages[end]
-              filtered_content = [c for c in result.content if !(c isa reasoningContent)]
-              put!(agent.outputChannel, result)
-              if !isempty(filtered_content) && filtered_content[1] isa textContent
-                agent.agentEventSink(filtered_content[1].text)
+              result = deepcopy(agent._state.messages[end])
+
+              # filter out reasoningContent in-place
+              filter!(c -> !(c isa reasoningContent), result.content)
+
+              # format output
+              respondToUI = _assistantMessageToOpenAI(result)
+
+              put!(agent.outputChannel, respondToUI)
+              if !isempty(result.content) && result.content[1] isa textContent
+                agent.agentEventSink(result.content[1].text)
               end
               processingTask = nothing        # reset
               result = nothing                # reset