I was wondering if anyone could point me towards any Metadata Agent development documentation?
Specifically I’m looking for a quick way to test an Agent easily. Right now I have to reload the server and for whatever reason Plex’s interaction with the agent log breaks tail (didn’t even know that was possible), meaning each change requires multiple steps just find out a selected the wrong XPATH element.
It was once available here: https://dev.plexapp.com/docs/agents/models.html, but access to that site seems to be broken now. Interest to support new agents or other development seems to be low. 
The old doc never got updated and now it seems to have been dropped completely. AFAIK there is no easy way to test your agent other than to recreate/rescan libraries when your code changes. Also if plex breaks completely you’ll have to restart it, to get anything working again. Sorry.
Suggest you reading this. http://www.devgrok.com/2015/03/developing-plex-media-server-plugins.html
You should be able to compile the python script. If it compiles, then the script is fine at least.
https://forums.plex.tv/discussion/172923/plugin-development-documentation#latest
https://forums.plex.tv/discussion/28084/plex-plugin-development-walkthrough
https://support.plex.tv/hc/en-us/articles/201169747-A-Beginner-s-Guide-to-v2-1
https://forums.plex.tv/discussion/179414/objects-definition-and-usage
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Thank you very much for the links. I’ll check them thoroughly for useful info. 
The wayback machine is awesome. I use it to find all kinds of old sites. Used it for some old Hero Games stuff (an RPG) that the owner of the site had taken down some 3-4 years ago, but was still in the archive anyways.
