# Legacy agent types

> What changes for agents built on the retired OpenAI Assistant and OpenAI GPTs paths.

Source: https://docs.runbear.io/legacy

Last updated: 2026-08-26

Runbear used to let you import an OpenAI Assistant or a GPT and drive it through
Runbear's channels. Both paths are retired for new setups. This page covers what
that means if you have one.

## What is retired

**OpenAI Assistant agents.** You cannot create one. Existing agents continue to run
and stay readable through the dashboard and the public API, but they are read-only
through the Agent API surface, and the tooling around them is no longer extended.

**OpenAI GPTs import.** Removed. The import endpoint returns an explanatory error.

**OpenAPI Actions and `__api__` function calling.** These add-on styles were how
Assistant agents called external APIs. They accept no new configurations. The
replacement is [MCP](/agents/tools/overview.md), which covers the same ground with
per-user authorization and a managed catalog.

## Moving to a current agent

There is no automatic conversion, because the pieces do not map one to one. In
practice a rebuild is short:

1. Create a new agent from the **Agents** page.
2. Copy the Assistant's system prompt into [Instructions](/agents/instructions.md),
   splitting it into named blocks as you go.
3. Re-upload or reconnect its files as a [knowledge source](/agents/knowledge/overview.md).
   Files that came from Notion, Confluence, Google Drive, Slack, or SharePoint should
   be connected at the source instead, so they stay current on their own.
4. Replace each OpenAPI action with the equivalent [tool](/agents/tools/catalog.md),
   or a [custom MCP server](/agents/tools/custom-mcp.md) if the API is your own.
5. Move the channel connections over and remove the old agent once the new one
   answers correctly.

The rebuilt agent gains what the Assistant path never had: incremental knowledge
sync, per-user tool authorization, [triggers](/triggers.md), and
[traces](/api/traces.md).

## Related

- [Getting started](/getting-started.md)
- [Tools](/agents/tools/overview.md)