deno-sandbox

Run untrusted TypeScript code in isolated Firecracker microVMs.

5|Updated May 7, 2026

Search Tags:#security #isolation #deno #sandbox #microVM #firecracker

Ready to run

npx skills add https://github.com/raulk/hermetic --skill deno-sandbox-raulk

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: deno-sandbox
Source: https://github.com/raulk/hermetic/tree/main/.agents/skills/deno-sandbox
Command: npx skills add https://github.com/raulk/hermetic --skill deno-sandbox-raulk

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a secure, isolated environment to run untrusted user code safely, preventing sandbox escapes and protecting host systems.

Core Features & Use Cases

Isolated Code Execution: Run untrusted scripts in a sandboxed environment to prevent security breaches.
Multi-tenant Environments: Create multi-user platforms that require secure code execution spaces.
Use Case: Develop a code playground where users can write and test JavaScript or TypeScript code without risking the host system.

Quick Start

Use the deno-sandbox skill to execute user-submitted TypeScript code safely in an isolated environment.

Frequently Asked Questions about deno-sandbox

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I securely execute untrusted code in a sandboxed environment?▼

To securely execute untrusted code in a sandboxed environment, you can use Firecracker microVMs to establish strict isolation, preventing sandbox escapes and protecting the host system from malicious scripts. This approach is ideal for multi-tenant platforms.

What is the best way to run untrusted TypeScript code for a multi-user code playground?▼

Running untrusted TypeScript code for a multi-user code playground is best achieved by leveraging Firecracker microVMs, which provide secure isolated environments tailored for multi-tenant platforms requiring strict isolation to prevent security breaches.

Can I use Firecracker microVMs to isolate AI agent tool execution?▼

Yes, you can use Firecracker microVMs to isolate AI agent tool execution, providing a secure environment that enforces strict isolation requirements and protects host systems from potentially malicious operations generated by autonomous agents.

Does Deno provide strict isolation for running untrusted user scripts?▼

Deno leverages Firecracker microVMs to provide strict isolation for running untrusted user scripts, ensuring that multi-tenant environments and code playgrounds remain secure by preventing sandbox escapes and protecting the underlying host system.

What are the limitations of using microVMs for isolated code execution?▼

The primary limitation of using microVMs for isolated code execution is the operational overhead required to manage Firecracker instances, though it effectively prevents sandbox escapes and secures multi-tenant platforms running untrusted code.