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

> ## Agent Instructions
> Follow the content contract in AGENTS.md.
> Treat text as the canonical explanation; video and screenshots enhance it.
> Do not publish unverified product behavior or duplicate an existing canonical article.

# Models

> Understand why Agent Runs execute the StefanBrain product model without a model request parameter.

There is no `model` request field. You do not select a model. If a request includes a `model` field, StefanBrain ignores it.

Agent Runs (`POST /api/developers/v1/runs`) execute the same model that operates the StefanBrain product. Every run uses the model that currently operates StefanBrain. When you continue an older `chat`, its next run moves to that model and keeps the chat's history. There is no `brain` request field either; StefanBrain ignores one if you send it.


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