Proceeding his
PS4 Lib CISO Port & Zlib release, PlayStation 4 homebrew developer
@cfwprophet of
CFWPrpht.Tumblr.com updated his
Github projects recently including
LibLuaPS4: LibLua 5.3.5 for PS4, a
PS4_debug_module PRX with filesystem access that can write to USB, a
PS4 Rtl_usrlnd_printf Userland "printf" driver for retail consoles and progress in his
PS4 LibHB project adding Visual Studio integration to create graphical homebrew in less then a minute with a
demo video on his
YouTube Channel!
To quote from his recent
Blog entry: Oh dare you Lua ! Initialization process of the config, using Lua, brakes to run the App Loop in a own CPU Core. Will throw a fix for libhb quickly. User Entry still runs in Core 1. Will look into how to fix that so we can run the App in Core 3.

From the
ReadMe.md, to quote:
LibLua 5.3.5 for PS4
This source was built with the official Sony *** 4.50.
Download:
liblua_bin_SDK_450.rar /
libluaPs4-master.zip /
LibLuaPS4 GIT

From the
ReadMe.md, to quote:
PS4_debug_module
Code:
____ __________ __ ___ ___ ___ ___ ____ __ ____ ____
|| \\|| || ))| ||// \\ ||\\//||// \\|| \\|| |||| ||
|| ))|== ||=)|| |(( ___ || \/ |(( ))| ))| |||| ||==
||_//||___||_))\_//\\_|| || ||\\_//||_//\\_//||__|||___
What's this ?
A driver for debugging reasons. Will jailbreak the process if needed so, that it has access to fs and can write a file to usb.
Does it need any special drivers to be loaded ?
No. Only the system drivers which are automatically loaded. The Fios2 should be...