The first source-only release Zclk v0.1.0-alpha.0 of Zclk is out. It is a C library which can be used to create CLI programs written in both C and Lua. It supports commands, sub-commands, arguments, options and typed values.
Commands and sub-commands can be implemented both in Lua and C. Allowing a mix of implementations.
The documentation is available online at ZClk docs. For further details check the project page Zclk.