fuzzing

Loading a model from a hub means running a binary parser on a file a stranger gave you. This is the map for Crucible: what the attack surface is, why a format-aware fuzzer beats a dumb one on it, and how a seed file becomes a filed advisory.

A structure-aware fuzzer found a small ONNX memory-safety bug, GitHub Copilot helped patch it upstream, and the public issue-to-merge loop closed the same afternoon.

SafeTensors did not survive fuzzing by luck. It survived because the format puts validation before allocation, keeps code out of the file, and treats model loading as an input-parsing problem.