Good constructive feedback, much appreciated. > Prefer just a simple MIT over GPL Done. I added MIT or Apache-2.0 or GPL-2.0-or-later. > properly license you

Good constructive feedback, much appreciated. > Prefer just a simple MIT over GPL Done. I added MIT or Apache-2.0 or GPL-2.0-or-later. > properly license your repo on Github Done. I added LICENSE.md file with SPDX links. > Unit tests Done. I added example tests. Do you have a preferred POSIX shell script unit test approach? > And more... Good ideas, all of them. I'll add your ideas to a new TODO section. Thank you so much!