NotiCap executes SSH commands when receiving a notification from a specific application.
After installation, you first have to grant NotiCap notification access.
To do this, go to Filter Rules->Setup, search for NotiCap in the displayed list and enable notification access.
The next step is to setup your first identity at SSH Identities->Add SSH Identity.
Finally, go back to Filter Rules and select Add Filter Rule.
Note: The Filter Rule screen only provides very basic options at the moment. If you miss a specific function, feel free to add it and submit a Pull Request or open a new issue.