MiniScript is a 3rd party scripting language for Unity. This repository provides syntax highlighting files for Microsoft's VS Code (https://code.visualstudio.com/). It may or may not work in other editors too!
It looks like this is something a language extension can provide.
So, this is a request to add basic autocompletion support for common MiniScript types and functions. Ideally, have some sort of switch that lets the user specify (or somehow detects) whether they are in the context of Mini Micro, which has a larger API and is a very common MiniScript environment.
It doesn't need to be perfect; assume the user has not overridden any standard APIs. I'd say, for a first pass it doesn't need to keep track of user-written classes and other assignments, either. Just being able to autocomplete "gfx.drawImage" in a Mini Micro context would be a great first implementation.