docs(llm-providers): add LLMTR AI gateway provider

[knowhycodata]

What

Adds documentation for LLMTR as an LLM provider option, alongside the existing OpenRouter / Novita / OpenAI-compatible gateways.

LLMTR is a Turkey-hosted, OpenAI-compatible AI gateway that exposes 265+ models (OpenAI, Anthropic, Google, Qwen, plus Turkey-hosted open models such as llmtr/trendyol-asure-12b) under a single API key.

Why

Users in the region — and anyone wanting Turkey data residency for llmtr/ models — asked how to point Strix at LLMTR. It is a common OpenAI-compatible gateway, so making it a first-class documented option lowers setup friction.

How

LLMTR uses an OpenAI-compatible endpoint, so it slots into the existing pattern already used for Novita and local gateways — the openai/ LiteLLM route prefix plus LLM_API_BASE:

export STRIX_LLM="openai/anthropic/claude-sonnet-5"
export LLM_API_KEY="llmtr-..."
export LLM_API_BASE="https://llmtr.com/v1"

No code changes — this is docs-only:

• docs/llm-providers/llmtr.mdx — new provider guide (setup, model table, Turkey-hosted models, API-key steps, optional LLM_EXTRA_HEADERS attribution)
• docs/docs.json — register the page in the LLM Providers nav
• docs/llm-providers/overview.mdx — add an LLMTR card to the provider grid

Env var names used in the doc (STRIX_LLM, LLM_API_KEY, LLM_API_BASE, LLM_EXTRA_HEADERS) were verified against strix/config/settings.py.

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

Adds an LLMTR provider guide describing OpenAI-compatible gateway configuration, model selection, optional attribution headers, and Turkey-hosted models.

• Registers the guide in the LLM Providers navigation.
• Adds an LLMTR card to the provider overview.
• Documents the existing openai/ routing and environment-variable configuration pattern.

Confidence Score: 5/5

The documentation-only PR appears safe to merge, with no concrete blocking or non-blocking defects identified.

The new page follows existing documentation conventions, and the documented configuration variables and model-prefix routing agree with the repository’s current configuration and pinned SDK behavior.

Important Files Changed

Filename	Overview
docs/docs.json	Registers the new LLMTR guide using the established extensionless provider-page navigation convention.
docs/llm-providers/llmtr.mdx	Adds the provider setup guide; its documented environment variables, nested OpenAI-compatible route, and extra-header format align with current configuration behavior.
docs/llm-providers/overview.mdx	Adds a provider card whose route matches the newly registered guide.

_{Reviews (1): Last reviewed commit: "docs(llm-providers): add LLMTR AI gatewa..." | Re-trigger Greptile}