fix: /v1/chat/completions -> /v1/responses json_schema

[seefs001]

Summary by CodeRabbit

• Refactor

  • Improved internal response format handling and centralized format conversion logic for better maintainability.

• Bug Fixes

  • Removed max_output_tokens minimum constraint enforcement.

[coderabbitai]

Walkthrough

A helper function convertChatResponseFormatToResponsesText() is introduced to consolidate ResponseFormat-to-JSON conversion logic. The function replaces inlined construction in ChatCompletionsRequestToResponsesRequest. A commented note documents an OpenAI constraint regarding max_output_tokens minimum boundary.

Changes

Cohort / File(s)	Summary
Response Format Conversion Helper service/openaicompat/chat_to_responses.go	Extracted convertChatResponseFormatToResponsesText() function to handle ResponseFormat serialization with support for json_schema merging and fallback embedding. Refactored existing call site to use the new helper instead of inlined logic. Added clarifying comment on OpenAI max_output_tokens constraint.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 A helper hops into view,
Consolidating what was split in two,
ResponseFormats now find their place,
In functions clean with gentle grace,
Code blooms clearer, day by day!

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: fixing json_schema handling in the conversion from /v1/chat/completions to /v1/responses endpoint.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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