# Anthropic's Claude Proves 239 Open-Source Libraries Crash-Free, Exposing Fuzzing Blind Spots

AlphaSignal, 2026-10-22. [Read the original](https://alphasignal.ai/news/anthropic-s-claude-proves-239-open-source-libraries-crash-free-exposing-fuzzing).

Anthropic and Theorem used Claude to formally verify open-source libraries down to the RISC-V assembly, proving them free of crashes.