> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-stale2000-comfy-agent-guides.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Comfy Agent Data and Privacy

> Understand what Comfy Agent uses to answer a request and how local and Cloud use differ.

## The short version

Comfy Agent uses your message, selected workflow, selected nodes, and attachments. When you work with a local ComfyUI installation, chat history is stored on that machine. Your message and the information needed to answer it are sent through Comfy's online service.

## What the Agent uses

| Data                          | How it helps                                                         |
| ----------------------------- | -------------------------------------------------------------------- |
| Your message                  | Tells the Agent what you want to do.                                 |
| Selected workflow and nodes   | Show which workflow and nodes you want explained or changed.         |
| Image attachment              | Lets the Agent inspect the image and use it in a workflow.           |
| Video or audio attachment     | Lets the Agent read media properties and extract or convert content. |
| Workflow and execution errors | Help the Agent explain and fix a failed workflow.                    |
| Personal skill                | Supplies reusable instructions.                                      |

The [Privacy Policy](https://www.comfy.org/privacy-policy?utm_source=docs) and [Terms of Service](https://www.comfy.org/terms-of-service?utm_source=docs) govern your use of Comfy.

## Cloud and local data flow

| Where you use Comfy Agent    | What happens                                                                                                                                                                                                                                    |
| ---------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Comfy Cloud**              | Comfy Cloud stores conversations, workflows, and assets. Your messages are processed by Comfy's online service, and workflows run on Cloud GPUs.                                                                                                |
| **Local ComfyUI in Desktop** | The local installation stores chat history, workflows, and files. Your messages and relevant workflow information are processed by Comfy's online service. Local workflow nodes run on your hardware; partner nodes use their online providers. |

## Chat history and sync

Conversations with the Cloud Agent are stored with Comfy Cloud. Conversations with the local Agent are stored on the machine running ComfyUI. The two histories do not sync. This depends on whether you are using Cloud or a local installation, not which application window you open it in.

## Skills and guidance

Personal skills contain instructions you create for the Agent. They are saved to your account and used when your request matches them or you name them.

Built-in Agent guidance and skills for external coding agents are separate from your personal Agent skills.

## Retention and deletion

For retention details, see the [Privacy Policy](https://www.comfy.org/privacy-policy?utm_source=docs) and [Data Retention](/support/data-retention).

For account or data-deletion requests, contact [support@comfy.org](mailto:support@comfy.org).