Varnish https://varnish-cache.org/trac/wiki/ArchitectNotes and https://varnish-cache.org/docs/6.0/phk/firstdesign.html
Also, I'm a little bit surprised by the title/description, and then the examples. As opposite, I was looking at something like https://github.com/JonathanHuot/needrun/ which is EXACTLY a "plain shell script".
Varnish https://varnish-cache.org/trac/wiki/ArchitectNotes and https://varnish-cache.org/docs/6.0/phk/firstdesign.html
Also, I'm a little bit surprised by the title/description, and then the examples. As opposite, I was looking at something like https://github.com/JonathanHuot/needrun/ which is EXACTLY a "plain shell script".