Well, before even writing anything, I've looked up into PS docs, and noticed Register-ArgumentCompleter cmdlet. It could definitely be used for autocompletion p

Well, before even writing anything, I've looked up into PS docs, and noticed Register-ArgumentCompleter cmdlet. It could definitely be used for autocompletion purposes, but we need something like a database of autocomplete definitions for common utilities to get started, and a tool to read such a database. So, I propose to create a format for autocomplete definitions and invite everyone to discuss it.