"a quasi is like a little templating language for the raku code"
Please consider choosing a word other than quasi. Using quasi introduces conceptual complexity that is unnecessary and, imo, harmful. Given that what it does is a "Transform of a syntax template" with the transform being "To AST", please consider one or more of ToAST, toAST, and/or toast, and perhaps encourage the lie-to-children simplicity of "template of AST".