reminds me of an project I made many years ago to manage dependencies in between repositories. So if project A was waiting for a fix in project B to be in production, you could draw a line between the two commits (from project A to project B) and get notified when the commit in project B gets into the "production" branch. And then merge and deploy your feature branch from project A.
I worked on a toy programming language (that compile down to golang), which is a fork of the go lexer/parser, but it changes how functions can only return one value allowing the use of Result[T]/Option[T] and error propagation operators `!` and `?`.
It has enums (sum type), tuple, built-in Set[T], and good Iterator methods. It has very nice type inferred lambda function (heavily inspired by the swift syntax)... lots of good stuff!
I'm well aware of it. But I don't think I have ever seen an editor/website which would display it as 9 spaces. Github for example default to 4 spaces width.
I like how he kept "tabs" (and display it as 9 spaces) to make it as ugly as possible for the bad example, then proceed to use 4 spaces for the other examples.
For case like this, I'd say your text editor should definitely just be able to tell you right away that this variable is a "string" when you mouse over it.
It also have a working LSP server and generates a sourcemap, so when you get a runtime stacktrace, it gives you the original line in your .agl file as well as the one in the generated .go file.