Fiber Checker
Copyright 2026 Chase Hendrick and Scrolls contributors

The Fiber Checker code (app.py, fibercat.py, tools/, and fibercheck.py and fcmodel.py from scripts/fibercheck/ in
https://github.com/ChaseHendrick/Scrolls) is licensed under the Apache License, Version 2.0. See LICENSE.

The free judge's weights (weights/fibercheck-local.pt, SHA-256
e43c25b322816f9f821a154a472eb51e0af86baa194ca5d65094083e8c4b35d7) were trained by Chase Hendrick on renders of
Vesuvius Challenge open data and on Claude's answers about them; they are released with this Space under the Apache
License, Version 2.0. Anthropic's Claude is called only with a visitor's own API key, under that visitor's own terms
with Anthropic.

Scan data: Fiber Checker reads CT scans and segment meshes from the Vesuvius Challenge open data, licensed CC BY-NC 4.0
(https://creativecommons.org/licenses/by-nc/4.0/). Giorgio Angelotti, Stephen Parsons, Sean Johnson, Elian Rafael
Dal Prà, Johannes Rudolph, Paul Tafforeau, Alessandro Mirone, Paul Henderson, Hendrik Schilling, Forrest McDonald,
David Josey, Youssef Nader, C. Seth Parker, W. Brent Seales. Vesuvius Challenge: CT Scans of Herculaneum Papyri.
Vesuvius Challenge. https://scrollprize.org/data

The game's pictures (assets/game.npz) are renders of that data along open-data meshes of public scrolls on no prize
list, and the fiber maps the Space makes are model output computed from it, so both are derived data under
CC BY-NC 4.0 as well.