Made while doing the codecrafters' shell implementation challenge -- but let's see I'll add stuff that I find interesting. Given it's at ~1000 LOC the goal is still to keep it as small as possible, as part of that

Almost no error handling on POSIX apis or otherwise
Linux only
Edge cases are intended to be unhandled wherever they are
focus on "terse" modern cpp code and practices, even if they are not the most efficient

what we DO have is

no external dependencies ( not even GNU readline ), except POSIX and C++ standard library
support for pipelines, redirection, and background processes

Running

make wrapper over cmake

make build
make run
make clean