docs: add Auxen integration page

[ai-auxen]

Adds a Model Provider integration page for Auxen, which serves per-customer dedicated LLM endpoints (Llama 3.1/3.2, Qwen 2.5, Mistral, Gemma 2, Mixtral, Phi-3, Command R) with an OpenAI-compatible `/v1/chat/completions` API.

The page documents tracing Auxen calls via the existing `langfuse.openai` drop-in wrapper — no Auxen-specific Langfuse SDK is required. Each Auxen instance has a per-instance base URL of the form `https://api.auxen.ai/v1/inst_xxx/v1\` and an `auxk_*` bearer token, and the OpenAI client just needs both passed through.

Mirrors the structure of the existing DeepSeek / Together / Fireworks pages and gets added to the Model Providers sidebar in alphabetical position.

Companion PRs (Auxen distribution series)

• BerriAI/litellm#28532 — LiteLLM provider
• vercel/ai#15536 — Vercel AI SDK community provider
• langchain-ai/docs#4146 — LangChain docs
• run-llama/llama_index#21764 — LlamaIndex Python
• continuedev/continue#12473 — Continue.dev provider
• Helicone/helicone#5685 — Helicone gateway
• npm: `@auxen/ai-sdk-provider` (live)

AI agent (Claude) assisted in drafting this PR.

Greptile Summary

This PR adds a new Model Provider integration page for Auxen and inserts it in the alphabetically correct position in the sidebar meta.json. The page documents how to trace Auxen's OpenAI-compatible endpoints using Langfuse's langfuse.openai drop-in wrapper.

• auxen.mdx follows the structure of the DeepSeek / Together AI / Fireworks AI pages and covers setup, chat completion, @observe() grouping, and streaming examples.
• meta.json correctly inserts \"auxen\" between \"anthropic\" and \"baseten\".
• The page currently uses the OpenAI provider logo (openai_icon.svg) as a placeholder, which will display the wrong branding in the sidebar; a provider-specific icon should be added or the field left blank.

Confidence Score: 4/5

Safe to merge after fixing the logo — the OpenAI icon placeholder actively shows wrong branding on the Auxen page.

The docs content and code examples are correct, but the logo frontmatter points to openai_icon.svg, so users browsing the Langfuse integrations list will see the OpenAI logo next to the Auxen entry. The missing LearnMore component and unused observe import are minor polish items.

content/integrations/model-providers/auxen.mdx — logo field and missing LearnMore footer

Sequence Diagram

sequenceDiagram
    participant App as User Application
    participant LF as langfuse.openai (wrapper)
    participant Auxen as Auxen API
    participant LFCloud as Langfuse Cloud

    App->>LF: client.chat.completions.create(model, messages)
    LF->>Auxen: POST /v1/chat/completions
    Auxen-->>LF: ChatCompletion response
    LF-->>App: response (transparent pass-through)
    LF->>LFCloud: Async trace (prompt, completion, tokens, latency)

Loading

Prompt To Fix All With AI

Fix the following 3 code review issues. Work through them one at a time, proposing concise fixes.

---

### Issue 1 of 3
content/integrations/model-providers/auxen.mdx:4
**Wrong logo — OpenAI icon shown on Auxen page**

The `logo` field points to `/images/integrations/openai_icon.svg`, so the OpenAI logo will be rendered in the Langfuse docs sidebar and page header for this Auxen integration. Every other provider page uses a provider-specific icon (e.g., `deepseek_icon.svg`, `fireworks_ai_icon.svg`). Either add an Auxen-specific SVG under `public/images/integrations/` or leave the field empty until one is available.

### Issue 2 of 3
content/integrations/model-providers/auxen.mdx:55-62
The `from langfuse import observe` import in the client-initialization block is unused — `@observe()` isn't called until the next section. Importing something that isn't used in the same snippet may confuse readers who copy just this block.

```suggestion
# Drop-in replacement: tracing is automatic
from langfuse.openai import OpenAI

client = OpenAI(
    base_url=os.environ["AUXEN_API_BASE"],
    api_key=os.environ["AUXEN_API_KEY"],
)
```

### Issue 3 of 3
content/integrations/model-providers/auxen.mdx:126
Every comparable provider page (DeepSeek, Together AI, Fireworks AI, etc.) ends with the `LearnMore` component, which surfaces related Langfuse docs and links to further resources. This page is missing it.

```suggestion
Pricing is per-minute of dedicated GPU runtime, not per-token. See [auxen.ai/pricing](https://auxen.ai/pricing).

import LearnMore from "@/components-mdx/integration-learn-more.mdx";

<LearnMore />
```

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Greptile also left 1 inline comment on this PR.

[claude]

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[greptile-apps]

Wrong logo — OpenAI icon shown on Auxen page

The logo field points to /images/integrations/openai_icon.svg, so the OpenAI logo will be rendered in the Langfuse docs sidebar and page header for this Auxen integration. Every other provider page uses a provider-specific icon (e.g., deepseek_icon.svg, fireworks_ai_icon.svg). Either add an Auxen-specific SVG under public/images/integrations/ or leave the field empty until one is available.

Prompt To Fix With AI

This is a comment left during a code review.
Path: content/integrations/model-providers/auxen.mdx
Line: 4

Comment:
**Wrong logo — OpenAI icon shown on Auxen page**

The `logo` field points to `/images/integrations/openai_icon.svg`, so the OpenAI logo will be rendered in the Langfuse docs sidebar and page header for this Auxen integration. Every other provider page uses a provider-specific icon (e.g., `deepseek_icon.svg`, `fireworks_ai_icon.svg`). Either add an Auxen-specific SVG under `public/images/integrations/` or leave the field empty until one is available.

How can I resolve this? If you propose a fix, please make it concise.