There is also https://github.com/nixpulvis/oursh https://github.com/nixpulvis/oursh which wants to be POSIX compatible with its own extensions. Actually I would

There is also https://github.com/nixpulvis/oursh https://github.com/nixpulvis/oursh which wants to be POSIX compatible with its own extensions. Actually I would prefer if a new shell focuses on bash compatibility. If features are integrated, then I would probably want to have something about error handling because it is difficult to get right in bash even with shellcheck¹ plus shellharden², and gets just worse when things run in parallel. ¹ https://www.shellcheck.net/ https://www.shellcheck.net/ ² https://github.com/anordal/shellharden https://github.com/anordal/shellharden