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atherisby Trail of BitsDevelopmentGitHub stars: 7.4k

Atheris skill: what it does and how to install it

Sets up and runs Atheris, a coverage-guided Python fuzzer, with harnesses, native extension instrumentation and AddressSanitizer support.

Summary generated from the skill's documentation.

Install

$ npx skills add trailofbits/skills --skill atheris

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. Sets up Atheris with uv, Docker or local compiler settings, then builds TestOneInput harnesses for raw or structured inputs. It covers pure Python and Python C extensions, corpus management, libFuzzer campaigns, coverage instrumentation and AddressSanitizer or UBSan configuration.

When to use it. Use it for coverage-guided fuzzing of Python packages and native extensions, especially memory-corruption testing with sanitizers. Prefer Hypothesis for property-based testing or python-afl for AFL-style fuzzing when those approaches fit better.

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

4.8k

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

Installs via skills.sh

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