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libfuzzerby Trail of BitsDevelopmentGitHub stars: 7.4k

LibFuzzer skill: what it does and how to install it

Sets up and runs LLVM's libFuzzer on Clang-built C/C++ code, covering harnesses, sanitizer builds, corpus management and campaign troubleshooting.

Summary generated from the skill's documentation.

Warning. A security audit flagged this skill with a warning. Read its SKILL.md and scripts before you install it.

Install

$ npx skills add trailofbits/skills --skill libfuzzer

Run it in a terminal. If your agent is already running, start a new session so it picks the skill up.

About this skill

What it does. Creates and compiles LLVMFuzzerTestOneInput harnesses, then runs libFuzzer with sanitizers, seed corpora, dictionaries and coverage instrumentation. It also covers crash reproduction, corpus minimisation, multi-core options and diagnosing slow or ineffective campaigns.

When to use it. For quick, focused fuzzing of C/C++ libraries that compile with Clang. Consider AFL++ or another fuzzer for serious multi-core campaigns, custom fuzzers or code that cannot compile with Clang.

History

Repo stars

7.4kAbout +216 since 9 Jul 2026

Before 1 Oct 2026 the curve is estimated from public event data.

Stars are counted for the whole repository, which holds 49 skills.

Show as a table
Repo stars by day
DateRepo stars
5 Oct 20267,370
4 Oct 20267,355
3 Oct 20267,348
2 Oct 20267,340
1 Oct 20267,320
24 Sept 2026 (estimated)7,310
17 Sept 2026 (estimated)7,305
10 Sept 2026 (estimated)7,239
3 Sept 2026 (estimated)7,179
27 Aug 2026 (estimated)7,174
20 Aug 2026 (estimated)7,174
13 Aug 2026 (estimated)7,169
6 Aug 2026 (estimated)7,164
30 Jul 2026 (estimated)7,164
23 Jul 2026 (estimated)7,164
16 Jul 2026 (estimated)7,164
9 Jul 2026 (estimated)7,154

Installs

4.9k

Tracking since . A chart appears once there are 7 days of data.

Installs via skills.sh

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