> ## Documentation Index
> Fetch the complete documentation index at: https://docs.yelu.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Track documented Yelu AI API capabilities and compatibility updates.

This changelog records public documentation and API compatibility milestones. Model availability and provider-specific behavior can change independently; always use [`GET /v1/models`](/en/api-reference/models) for the catalog available to your key.

## July 13, 2026

### Documentation baseline

* Added complete Claude Code and Codex CLI setup guides for macOS, native Windows, and WSL 2, plus practical coding-agent examples.
* Published the complete Mintlify documentation for Models, Chat Completions, Responses, Images, Embeddings, and Audio Transcriptions.
* Added production guides for streaming, vision, function calling, structured output, image generation, and reliability practices.
* Added OpenAI-compatible SDK setup for Python, JavaScript, and Go.
* Added end-to-end examples in curl, JavaScript Fetch, and Python.
* Documented configurable rate limits and the OpenAI-compatible error envelope.

## Compatibility policy

Yelu follows OpenAI-compatible endpoint and field conventions while routing to multiple providers. Compatibility has three practical boundaries:

1. **Gateway contract** — authentication, paths, common request fields, error envelope, and normalized response shapes documented here.
2. **Model capability** — support for vision, tools, JSON output, reasoning, modalities, and specific limits depends on the selected model and upstream provider.
3. **Account catalog** — enabled models and commercial terms depend on your account and are discoverable through the dashboard and Models API.

<Info>
  Integrations should ignore unknown response fields, tolerate additive changes, and avoid depending on provider-specific behavior unless it is tested for the selected model.
</Info>

## Stay compatible

* Discover models instead of maintaining a permanent local list.
* Pin SDK major versions and review their release notes before upgrades.
* Validate structured outputs in your application even when a model supports JSON schema.
* Add contract tests for critical prompts, tool schemas, and streaming parsers.
* Subscribe to operational announcements available through your Yelu account.