nexxtporter by Eigenvector32
https://github.com/eigenvector32/nexxtporter

A command line tool for extracting .chr, .nam and .pal files as you please from a NEXXT session (.nss). It can also generate .png bitmaps.

Putting this in your build instructions, you can make sure your NES project always has up to date assets from your working NEXXT sessions. This can allow for better version control than exporting assets manually from within NEXXTs GUI.