fix(openai): emit reasoning_content in Chat Completions streaming#2159
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石岳峰 (syf2211) wants to merge 1 commit into
Open
fix(openai): emit reasoning_content in Chat Completions streaming#2159石岳峰 (syf2211) wants to merge 1 commit into
石岳峰 (syf2211) wants to merge 1 commit into
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Parse delta.reasoning_content on OpenAIStreamDelta and emit StreamFrame.ReasoningDelta during Chat Completions streaming, matching the non-streaming path that already maps reasoningContent to MessagePart.Reasoning. Update ABI dumps for OpenAIStreamDelta.reasoningContent. Fixes JetBrains#2148
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Summary
Emit
StreamFrame.ReasoningDelta/ReasoningCompletewhen OpenAI Chat Completions streaming returnschoices[].delta.reasoning_content, aligning streaming behavior with the existing non-streaming path.Fixes #2148
Motivation
Providers such as DeepSeek and OpenAI-compatible gateways return chain-of-thought in streaming deltas as
reasoning_content. The non-streaming Chat Completions path already maps this field toMessagePart.Reasoning, but the streaming path ignored it entirely—so switching fromexecute()toexecuteStreaming()silently dropped reasoning output.Changes
OpenAIStreamDelta: add optionalreasoningContentfield (JSON:reasoning_contentvia SnakeCase naming)OpenAILLMClient.processStreamingResponse: emitReasoningDeltawhendelta.reasoningContentis non-blankOpenAIStreamDeltapublic API referencesTests
./gradlew :prompt:prompt-executor:prompt-executor-clients:prompt-executor-openai-client:jvmTest \ --tests "ai.koog.prompt.executor.clients.openai.OpenAIChatCompletionLLMClientTest"Result: BUILD SUCCESSFUL (4 tests, all pass)
Notes
processStreamingResponsewithout reasoning emission—a potential follow-up outside this issue's scope.