Can you try this: tools.comskip-8.1.2.zip
I haven't tested it but should run.
I've installed this on my own LibreELEC machine, but attempting to run Comskip gives an error:
Code
/storage/.kodi/addons/tools.comskip/bin/comskip: line 1: syntax error: unexpected word (expecting ")")
Is there something wrong with the installation? I'm using LibreELEC 8.0.2 x86_64.