atheris

65 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a coding skill usually runs build and test commands.

By stanfish06/skillquarium (GitHub) · coding · 12 stars · scanned at commit f748ea9

Sets up and runs Atheris, the coverage-guided Python fuzzer built on libFuzzer. Covers TestOneInput harnesses, FuzzedDataProvider, instrumenting both pure Python and native C extensions, and running under AddressSanitizer. Use when fuzzing a Python package, hunting memory corruption in a Python C extension, or choosing between Atheris and Hypothesis for a Python target.

Works with any agent that supports SKILL.md skills.

Partially scanned — some files couldn't be read; we'll retry on the next scan

What this skill can do

Runs commands on your computer

The author does not mention this. Expected for a coding skill.

Found in 17 places.

skills/atheris/SKILL.md, line 50uv run python fuzz.py
skills/atheris/SKILL.md, line 66uv init --bare # once, if the harness directory is not yet a uv project
skills/atheris/SKILL.md, line 137docker build -t atheris .

Show 14 more

skills/atheris/SKILL.md, line 144python -c "import atheris; print(atheris.__version__)"
skills/atheris/SKILL.md, line 241export CC="clang"
skills/atheris/SKILL.md, line 252CBOR2_BUILD_C_EXTENSION=1 uv add --no-binary-package cbor2 'cbor2==5.6.4'
skills/atheris/SKILL.md, line 285uv run python cbor2-fuzz.py
skills/atheris/SKILL.md, line 295mkdir corpus
skills/atheris/SKILL.md, line 303uv run python fuzz.py corpus/
skills/atheris/SKILL.md, line 310uv run python fuzz.py -merge=1 new_corpus/ old_corpus/
skills/atheris/SKILL.md, line 321uv run python fuzz.py
skills/atheris/SKILL.md, line 327uv run python fuzz.py corpus/
skills/atheris/SKILL.md, line 334uv run python fuzz.py -max_total_time=600
skills/atheris/SKILL.md, line 361export CFLAGS="-fsanitize=address,fuzzer-no-link"
skills/atheris/SKILL.md, line 367export ASAN_OPTIONS="allocator_may_return_null=1,detect_leaks=0"
skills/atheris/SKILL.md, line 374export LD_PRELOAD="$(python -c 'import atheris; print(atheris.path())')/asan_with_fuzzer.so"
skills/atheris/SKILL.md, line 427export CFLAGS="-fsanitize=address,undefined,fuzzer-no-link"

Downloads and installs other software

The author does not mention this.

Found in 3 places.

skills/atheris/SKILL.md, line 82RUN apt update && apt install -y \
skills/atheris/SKILL.md, line 95RUN apt update && apt install -y \
skills/atheris/SKILL.md, line 120python -m pip install --no-binary atheris atheris

Changes files outside its own folder

The author does not mention this.

Found in 3 places.

skills/atheris/SKILL.md, line 91RUN echo "deb http://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-$LLVM_VERSION main" > /etc/apt/sources.list.d/llvm.list
skills/atheris/SKILL.md, line 92RUN echo "deb-src http://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-$LLVM_VERSION main" >> /etc/apt/sources.list.d/llvm.list
skills/atheris/SKILL.md, line 93RUN wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key > /etc/apt/trusted.gpg.d/apt.llvm.org.asc

Sends data to these websites: apt.llvm.org

The author does not mention this.

Found in 1 place.

skills/atheris/SKILL.md, line 93RUN wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key > /etc/apt/trusted.gpg.d/apt.llvm.org.asc

Safer alternatives

Low-risk skills in the same category (coding) that look related. Check that one does what you need.

100 Low riskatherisOutlineDriven/outline-driven-development · 55 stars

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'atheris' ] || [ -L ~/.agents/skills/'atheris' ]; then echo 'A skill folder named atheris already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/stanfish06/skillquarium' "$d" && git -C "$d" checkout --quiet 'f748ea91aa51ce8fc42c27c809dba73a8377b1d5' -- 'skills/atheris' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/atheris' ~/.agents/skills/'atheris' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'atheris' ~/.claude/skills/'atheris' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-08	`f748ea9`	65