Visual limits is a Blender add-on from xbodya13 that shows rigid body constraint limits in the viewport. It gives visual feedback on the limits set on constraints between objects, so those bounds stay visible as you work in the scene.
The add-on is compatible with Blender 4.3 and newer, and its documentation notes it works up to Blender 4.x. At version 1.3.2, it is a lightweight extension of around 2.6 KB, written entirely in Python, and it requires no special permissions to run. Visual limits is released under the GNU General Public License v3.0 or later, with source code available on the developer's GitHub repository.
Installation follows the standard Blender extension flow: drag and drop the file into Blender, or download it and install from disk. A demo video is available for a closer look at the add-on.