[codex] Enforce OpenAI reasoning compliance

[0x4007]

Summary

• normalize upstream null reasoning metadata to the OpenAI wire value \none\
• share the reasoning dropdown between chat playground and admin defaults
• reject explicit null reasoning fields in OpenAI-compatible request handling
• document the no-drift OpenAI API compliance rule in AGENTS.md

Validation

• deno lint
• deno task build
• deno test --env --allow-env=VOYAGEAI_API_KEY

[github-actions]

15 May 07:08

65e7922 fix: resolve reasoning compliance review feedback

Show 1 previous deployments

10 May 05:27

f2daba6 Enforce OpenAI reasoning compliance

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 10bcf555-117a-4231-96d0-66aa4fe0aee4

📥 Commits

Reviewing files that changed from the base of the PR and between 3f7a10f and 65e7922.

📒 Files selected for processing (16)

• AGENTS.md
• scripts/codex-models.ts
• src/admin.ts
• src/openai.ts
• src/static.ts
• static/admin.html
• static/admin.js
• static/chat.html
• static/chat.js
• static/docs/llms-agents.md
• static/reasoning-select.js
• tests/admin-auth.test.ts
• tests/codex-models.test.ts
• tests/openai-compat.test.ts
• tests/reasoning-select.test.ts
• tests/static-assets.test.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/openai-reasoning-compliance

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[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: f2daba649b

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[chatgpt-codex-connector]

Hide None when the model does not support it

For models whose stored supported_reasoning_levels do not include none (for example existing/pre-gpt-5.1 Codex snapshots with only low, medium, high, xhigh), this unconditionally advertises a None choice even though the updated backend validation in src/openai.ts rejects explicit none unless it is listed. Selecting it in chat sends reasoning_effort: "none", and selecting it in admin defaults saves the same value, so users are led into a 400 instead of seeing only supported efforts plus Default.

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