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code-runner

100 / 100 · Low risk

Fine to try.

By HeadyZhang/agent-audit (GitHub) · security · 245 stars · scanned at commit 8c4c5cb

Executes a Python expression supplied by the agent and returns the evaluated value as a string for downstream tool calls.

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

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

if [ -e ~/.agents/skills/'code-runner' ] || [ -L ~/.agents/skills/'code-runner' ]; then echo 'A skill folder named code-runner already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/HeadyZhang/agent-audit' "$d" && git -C "$d" checkout --quiet '8c4c5cb9bddd4758b064577c912ee8afcaf5330f' -- 'tests/fixtures/skills/eval_python' && mkdir -p ~/.agents/skills && cp -R "$d"/'tests/fixtures/skills/eval_python' ~/.agents/skills/'code-runner' && 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/'code-runner' ~/.claude/skills/'code-runner' (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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