A few things I have built and made public — have a look, break them, or build on them.
A small, hands-on crypto challenge site. Upload a file, dig through what comes back, and see how far you get unravelling the layers hidden inside. A playground for anyone who enjoys picking things apart.
Take the challenge
The Line 6 Helix .hsp preset format, reverse-engineered
and proven on hardware, packaged so an AI assistant can build guitar
patches from a plain description instead of clicking through menus.
Open source on GitHub.
© 2026 Gert Nelen · All rights reserved.