Self explanatory suggestion to be able to run any command upon player death, perhaps being able to make it dimension dependent as well.

Could you give an example? I understand the basic concept of course, I'd just like to grasp what kind of specific use-case you're interested in.

I was planning on using it in combination with Reskillable which is a mod that adds various skills to the game, it also adds a command “/reskillable resetall” that resets all the players skills, so I wanted to be able to reset all player skills on death.

So there were some issues with adding command usage, particularly regarding the fact that permission checks would block many attempts.

Instead, I've considered your use-case and added in support for Reskillable directly by adding in a config option to reset all skills on respawn.

Well for the modpack I am working on uses ThutsPerms to make sure command permissions aren't a problem but I can see why issues would rise from that kind of implementation, thank you for the case-specific feature!