About
libFuzzer is a coverage-guided fuzzer integrated into LLVM for testing C/C++ code compiled with Clang. It's ideal for quick, simple setup on single projects due to its low complexity and strong toolchain integration. While now in maintenance mode, it remains a widely supported and easy-to-use starting point for fuzzing.
Quick Install
Claude Code
Recommendednpx skills add trailofbits/skills -a claude-code/plugin add https://github.com/trailofbits/skillsgit clone https://github.com/trailofbits/skills.git ~/.claude/skills/libfuzzerCopy and paste this command in Claude Code to install this skill
GitHub Repository
Frequently asked questions
What is the libfuzzer skill?
libfuzzer is a Claude Skill by trailofbits. Skills package instructions and resources that Claude loads on demand, so Claude can perform libfuzzer-related tasks without extra prompting.
How do I install libfuzzer?
Use the install commands on this page: add libfuzzer to Claude Code as a plugin, or clone its repository into your skills directory, then restart Claude so it picks up the skill.
What category does libfuzzer belong to?
libfuzzer is in the Design category, tagged design.
Is libfuzzer free to use?
Yes. libfuzzer is listed on AIMCP and free to install. It runs inside Claude, so no separate service account is required to use the skill itself.
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