I was grumbling about WordPress (WP) blocks templates having no documentation for their markup, when I came across an extension to Visual Studio that auto-completes block templates for you. This gave me an idea: 💡Why not see if there’s a package I can install in Sublime Text?
There is: it’s called WordPress-Gutenberg-Blocks-Autocomplete by Skullmonkey. I installed it with Sublime’s package manager: Tools > Command Palette… > Package Control: Install Package > WordPress Gutenburg Blocks Autocompletions.
I don’t think it’s exhaustive, but it’s surely a step in the right direction.