Oh, ok, if you already have a plugin then its a case of trying to get it to work in a github fork of geany-plugins then you can make a PR for GP to add it.
IIUC you need to take out your `configure.ac` since there is one at the top level and you add your plugin to the list in it. Checks you need done are in the `pluginname.m4` in the `build` directory and that also enables/disables the plugin if checks fail. Its all explained in the geany plugins HACKING as well as the conventional makefile arrangement.
Maybe adding to addons isn't too bad
You need to talk to @eht16 about that, its his plugin.
But don't break it, its the only one I have enabled most of the time, the TODO feature is __essential__!!!! but I do wish my files have less of them :grin: