coderunner: A local sandbox for your AI agents

by instavm · MCP Server · ★ 900

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

How to install coderunner

git clone https://github.com/instavm/coderunner.git
claude plugin install instavm-coderunner

Taken from the project's README on GitHub. Check the security audit before running it.

Security audit verdict: CAUTION · quality 67/100

Flagged: sudo usage, spawns subprocesses. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

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Quick Facts

Stars900
Forks40
LanguagePython
CategoryMCP Server
LicenseApache-2.0
Quality Score67/100
Open Issues11
Last Updated2026-11-04
Created2025-06-23
Platformsclaude-code, cli, gemini, mcp, python
Est. Tokens~15k

About coderunner

CodeRunner: A local sandbox for your AI agents CodeRunner helps you sandbox your AI agents and its actions inside a sandbox. Key use case: You can run multiple Claude Code or AI agents in our sandbox without any fear of data loss and exfilteration.

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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