The articles sound interesting, particularly those about Plan 9.
So does TexiWeb Jr., a super simple literate programming system built on top of Texinfo and implemented in awk https://github.com/arnoldrobbins/texiwebjr
which is mentioned in
AWK As A Major Systems Programming Language — Revisited
http://www.skeeve.com/awk-sys-prog.html
struct --- Convert Fortran into Ratfor
could be useful for proot:
This is Brenda Baker's struct program. It converts plain old Fortran into Rational Fortran (ratfor). The code here is taken from the TUHS archives, starting with the V7 version, and progressing through V8 and V10.
https://github.com/arnoldrobbins/struct