About ML-Agents Extensions package (`com.unity.ml-agents.extensions`)

The Unity ML-Agents Extensions package contains optional add-ons to the C# SDK for the Unity ML-Agents Toolkit.

These extensions are all considered experimental, and their API or behavior may change between versions.

Package contents

The following table describes the package folder structure:

Location	Description
Documentation~	Contains the documentation for the Unity package.
Editor	Contains utilities for Editor windows and drawers.
Runtime	Contains core C# APIs for integrating ML-Agents into your Unity scene.
Tests	Contains the unit tests for the package.

The Runtime directory currently contains three features:

The ML-Agents Extensions package is not currently available in the Package Manager. There are two recommended ways to install the package:

Clone the repository and follow the Local Installation for Development directions (substituting com.unity.ml-agents.extensions for the package name).

In Unity 2019.4 or later, open the Package Manager, hit the "+" button, and select "Add package from git URL".

In the dialog that appears, enter

git+https://github.com/Unity-Technologies/ml-agents.git?path=com.unity.ml-agents.extensions

You can also edit your project's manifest.json directly and add the following line to the dependencies section:

"com.unity.ml-agents.extensions": "git+https://github.com/Unity-Technologies/ml-agents.git?path=com.unity.ml-agents.extensions",

See Git dependencies for more information.

This version of the Unity ML-Agents Extensions package is compatible with the following versions of the Unity Editor:

If using the InputActuatorComponent
- 2019.4 or later
- install the com.unity.inputsystem package version 1.1.0-preview.3 or later.
Else 2018.4 and later

For the InputActuatorComponent
- Limited implementation of InputControls
- No way to customize the action space of the InputActuatorComponent

The main README contains links for contacting the team or getting support.