Monitoring Folder Size

This is exactly what I am looking for.
Thank you very much.

Though neither the plugin itself nor the configuration file are deployed
When deploying with Agent Bakery, the Bakery lists the Plugin for deployment.
Agent is signed, Hashes are the same (installed agent and agent in bakery).

After deploying the plugin, there is no dir_size Plugin in /usr/lib/check_mk_agent/plugins/
There is also no dir_size.cfg in /etc/check_mk/

Did I do something wrong while installing the plugin?
I downloaded the .MKP File and installed it via GUI.

Files seem to be installed correctly.

OMD[mysite]:~$ find -name "*dir_size*"
./var/check_mk/precompiled_checks/local/dir_size
./var/check_mk/packages/dir_size
./local/share/check_mk/web/plugins/wato/check_parameters_dir_size.py
./local/share/check_mk/web/plugins/wato/agent_bakery_dir_size.py
./local/share/check_mk/web/plugins/metrics/dir_size.py
./local/share/check_mk/agents/bakery/dir_size
./local/share/check_mk/agents/plugins/dir_size
./local/share/check_mk/checks/dir_size
./local/share/check_mk/checkman/dir_size
./tmp/check_mk/check_includes/local/dir_size
OMD[mysite]:~$ mkp list
dir_size
OMD[mysite]:~$ mkp show dir_size
Package file:                  /omd/sites/mysite/var/check_mk/packages/dir_size
Name:                          dir_size
Version:                       4.1
Packaged on Checkmk Version:   1.6.0p2
Required Checkmk Version:      1.6.0
Valid until Checkmk version:   No version limitation
Title:                         Directory size Monitor
Author:                        Robert Sander <r.sander@heinlein-support.de>
Download-URL:                  https://github.com/HeinleinSupport/check_mk/tree/master/dir_size
Files:                         agents(2) checkman(1) checks(1) web(3)
Description:
  Monitor directory sizes

based on dir_size by Bastian Kuhn

It refers CheckMK 1.6.0p2 and 1.6.0, though and the last Github Update seems to be from 2 years ago.

I guess it just doesn’t work with CheckMK 2.0 anymore?

I tried testing the plugin manually (moving dir_size to the server and creating dir_size.cfg)
The Plugin itself seems to work and returns the correct folder size.

The question is now:
Why does CheckMK not deploy the plugin even though everything seems to be fine?