I'm not really sure what output file even means for an interpreted language, but GCC doesn't ask either, it will spit out an a.out by default (not even .elf or something logical).
The fact that there is a human (and one with expertise in R) reviewing each incoming package makes pure vibe coded slop much, much harder to get approved.
In the same boat... from a PL perspective, yikes (especially the macro mechanism that somehow never seemed to be planned, but somehow exists). As a working statistician? It really does get work done quickly.
To pass inputs with complex unevaluated syntax, I've seen...
– ad-hoc string parsing (lavaan etc.)
– formulas (which somehow the tidyverse doesn't use),
– base R syntax manipulation by round-tripping between as.list and as.call;
– and whatever wheel reinvention with bizarre semantics that the tidyverse uses.