It can be as complicated or as simple as you want to make it. Can be used locally only or deployed on a server. Single self-contained html file, can be encrypted too.
https://philosopher.life/#%24%3A%2FCommander:%24%3A%2FComman...
Bimlas' Locator blew my mind. I've never used anything like it before. That is worth checking out.
If you go the TW5-Bob route, building commandline tools for tags is also a great option.