docs: DaoXE example for OpenAI-compatible custom providers

[seven7763]

Summary

Adds a short concrete example under Configuring OpenAI-Compatible Endpoints for a multi-model gateway (DaoXE, https://daoxe.com/v1).

• Docs only: docs/docs/prompt-engineering/playground/02-custom-providers.mdx
• Reuses existing Custom Provider UI flow (API key + Base URL + model IDs)

Notes

• Account-scoped model IDs
• Chat Completions path
• DaoXE not available in mainland China
• Contributor is affiliated with DaoXE

Test plan

• Docs page renders
• Optional: Model Hub → Create Custom Provider → Base URL https://daoxe.com/v1

[vercel]

@seven7763 is attempting to deploy a commit to the agenta projects Team on Vercel.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 68f984e2-5e03-4060-a1ea-d4a6f7e63efb

📥 Commits

Reviewing files that changed from the base of the PR and between e723777 and fbefc61.

📒 Files selected for processing (1)

• docs/docs/prompt-engineering/playground/02-custom-providers.mdx

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📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Added a guide for configuring DaoXE as an OpenAI-compatible custom provider.
  • Included instructions for setting the API key, base URL, and account-specific model IDs.
  • Documented supported protocols and geographic availability.

Walkthrough

Adds documentation for configuring DaoXE as an OpenAI-compatible custom provider, including its API key, base URL, exact account-scoped model IDs, protocol support, geographic availability, and contributor disclosure.

Changes

DaoXE provider documentation

Layer / File(s)	Summary
DaoXE gateway setup docs/docs/prompt-engineering/playground/02-custom-providers.mdx	Adds configuration steps for DaoXE’s API key and base URL, guidance for selecting exact account-scoped model IDs, and provider-specific notes.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the added DaoXE example for OpenAI-compatible custom providers.
Description check	✅ Passed	The description matches the docs-only DaoXE example and notes the relevant setup details.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[CLAassistant]

All committers have signed the CLA.

[seven7763]

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

[seven7763]

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

[seven7763]

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

[seven7763]

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

[seven7763]

I've signed the CLA (CLA assistant may still show pending — please recheck via the badge if needed: https://cla-assistant.io/Agenta-AI/agenta?pullRequest=5328).

Vercel deploy needs team authorization (not something I can fix from the fork). Docs-only change; happy to adjust wording if reviewers prefer a more generic OpenAI-compatible framing.

[seven7763]

recheck CLA status please — signed as @seven7763. (If still pending: https://cla-assistant.io/check/Agenta-AI/agenta?pullRequest=5328 )