Add modelReasoningEffort option to TypeScript SDK

[danfhernandez]

Summary

• Adds ModelReasoningEffort type to TypeScript SDK with values: minimal, low, medium, high
• Adds modelReasoningEffort option to ThreadOptions
• Forwards the option to the codex CLI via --config model_reasoning_effort="<value>"
• Includes test coverage for the new option

Changes

• sdk/typescript/src/threadOptions.ts: Define ModelReasoningEffort type and add to ThreadOptions
• sdk/typescript/src/index.ts: Export ModelReasoningEffort type
• sdk/typescript/src/exec.ts: Forward modelReasoningEffort to CLI as config flag
• sdk/typescript/src/thread.ts: Pass option through to exec (+ debug logging)
• sdk/typescript/tests/run.test.ts: Add test for modelReasoningEffort flag forwarding

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[danfhernandez]

I have read the CLA Document and I hereby sign the CLA

[etraut-openai]

Thanks for the contribution.

We've updated our contribution guidelines to clarify that we're currently accepting contributions for bugs and security fixes, but we're not generally accepting new features at this time. We need to make sure that all new features compose well with both existing and upcoming features and fit into our roadmap. With the SDK, in particular, we are being very deliberate about what features we expose and what shape the API takes.

If you would like to propose a new feature, please file or upvote an enhancement request in the issue tracker. We will generally prioritize new features based on community feedback.

[etraut-openai]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. 👍

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