Add reasoning text content for OpenAI Responses ChatClient Streaming #6761
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Pull Request Overview
This PR adds support for reasoning text content during streaming responses in the OpenAI chat client. It introduces handling for reasoning summary text delta events to capture reasoning content while streaming.
- Add support for streaming reasoning text content in OpenAIResponsesChatClient
- Implement breaking-glass approach to extract delta text from reasoning events
- Add comprehensive test coverage for reasoning content streaming scenario
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
| OpenAIResponsesChatClient.cs | Adds handling for reasoning summary text delta events with JSON serialization/deserialization |
| OpenAIResponseClientTests.cs | Adds test case for streaming reasoning responses with detailed mock data |
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src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs
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src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs
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src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs
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test/Libraries/Microsoft.Extensions.AI.OpenAI.Tests/OpenAIResponseClientTests.cs
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@dotnet-policy-service agree company="Microsoft" |
stephentoub
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Sep 3, 2025
src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs
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src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs
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stephentoub
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Sep 5, 2025
src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs
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stephentoub
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Sep 5, 2025
src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIResponsesChatClient.cs
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stephentoub
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Sep 5, 2025
joperezr
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Sep 9, 2025
…6761) * Add reasoning text content for OpenAI Responses ChatClient Streaming --------- Co-authored-by: Stephen Toub <stoub@microsoft.com>
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Motivation and Context
Add support for text reasoning content while streaming in the
OpenAIResponsesChatClient.Microsoft Reviewers: Open in CodeFlow