Surface OpenAI-compatible reasoning_content as TextReasoningContent#7295
Merged
stephentoub merged 2 commits intodotnet:mainfrom Feb 13, 2026
Merged
Surface OpenAI-compatible reasoning_content as TextReasoningContent#7295stephentoub merged 2 commits intodotnet:mainfrom
stephentoub merged 2 commits intodotnet:mainfrom
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Pull request overview
This PR adds support for surfacing reasoning_content from OpenAI-compatible API providers (such as DeepSeek, vLLM, and OpenRouter) as TextReasoningContent in the Microsoft.Extensions.AI.OpenAI library. These providers expose reasoning information through non-standard JSON fields that are not part of the official OpenAI API schema, requiring extraction via JsonPatch.
Changes:
- Added logic to extract
reasoning_contentfrom non-standard JSON response fields using JsonPatch for both streaming and non-streaming completions - Surface the extracted reasoning content as
TextReasoningContentinstances in the chat response - Added comprehensive tests covering both streaming and non-streaming scenarios with realistic response data
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| src/Libraries/Microsoft.Extensions.AI.OpenAI/OpenAIChatClient.cs | Added TryGetReasoningDelta and TryGetReasoningMessage helper methods to extract reasoning content from JSON patches, and integrated them into streaming and non-streaming response processing |
| test/Libraries/Microsoft.Extensions.AI.OpenAI.Tests/OpenAIChatClientTests.cs | Added two test methods with realistic response payloads to verify reasoning content extraction works correctly in both streaming and non-streaming modes |
eiriktsarpalis
approved these changes
Feb 13, 2026
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