Build sandboxed code execution environments on Cloudflare Workers using the Sandbox SDK.
npx skills add https://github.com/Aki2022/skills --skill sandbox-sdk-aki2022
Please help me install this Agent Skill. Skill: sandbox-sdk Source: https://github.com/Aki2022/skills/tree/main/sandbox-sdk Command: npx skills add https://github.com/Aki2022/skills --skill sandbox-sdk-aki2022
exec() and capture stdout, stderr, and exit codes inside isolated containers. - Code Interpreter for AI: Execute LLM-generated Python, JavaScript, or TypeScript with runCode(), including rich outputs and persistent state across calls. - File and Port Management: Write, read, and list files in the sandbox, and expose HTTP services via preview URLs. - Use Case: Build an AI coding assistant that executes user-submitted Python scripts in isolated per-session sandboxes, returns results with charts, and destroys the container when the session ends. ## Quick Start Ask the AI to set up a Cloudflare Worker using @cloudflare/sandbox that runs a Python snippet in a sandbox and returns the output.High-intent search queries and answers about installing and using this skill.
Use sandbox.runCode() with a code context created via createCodeContext(). It supports Python, JavaScript, and TypeScript, returns rich outputs like text and images, and persists state within the context across calls.
Call sandbox.exec() with your command string after getting a sandbox via getSandbox(env.Sandbox, id). The result includes stdout, stderr, exitCode, and a success flag, with options for cwd, env vars, timeout, and stdin.
exec() runs shell commands directly and suits scripts and build pipelines needing exit codes. runCode() is a code interpreter for LLM-generated code, offering rich outputs, error objects, and state persistence across executions.
The Worker must re-export the Sandbox class with export { Sandbox } from '@cloudflare/sandbox'. Also verify wrangler.jsonc includes the containers, durable_objects bindings, and migrations entries exactly as required.
No, preview URLs from exposePort() require a custom domain with wildcard DNS such as *.yourdomain.com. The default .workers.dev domain does not support the subdomains needed for preview URLs.
Containers sleep after 10 minutes of inactivity by default, configurable via the sleepAfter option or keepAlive flag. Call destroy() to immediately terminate a sandbox and free its resources.
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