Build sandboxed code execution environments on Cloudflare Workers using the Sandbox SDK.
npx skills add https://github.com/mintuz/.dotfiles --skill sandbox-sdk-mintuz
Please help me install this Agent Skill. Skill: sandbox-sdk Source: https://github.com/mintuz/.dotfiles/tree/main/agents/.agents/skills/sandbox-sdk Command: npx skills add https://github.com/mintuz/.dotfiles --skill sandbox-sdk-mintuz
exec(). - Code Interpreter for AI: Execute LLM-generated Python, JavaScript, or TypeScript code with rich outputs and persistent state using runCode() and code contexts. - File and Port Management: Write, read, and list files in the sandbox, and expose HTTP services through preview URLs with exposePort(). - Use Case: Build an AI coding assistant that executes user-submitted Python data analysis scripts in isolated Cloudflare Workers containers, returning charts and results without risking your infrastructure. ## Quick Start Ask the AI to set up a Cloudflare Worker using the Sandbox SDK that runs Python code in an isolated sandbox and returns the execution results.High-intent search queries and answers about installing and using this skill.
Use the @cloudflare/sandbox SDK to get an isolated sandbox via getSandbox(env.Sandbox, sandboxId), then execute code with sandbox.exec() for shell commands or sandbox.runCode() for interpreted code. Each sandbox runs in its own container with configurable sleep and destroy lifecycle.
exec() runs shell commands and returns stdout, stderr, and exit codes, suiting scripts and build pipelines. runCode() executes Python, JavaScript, or TypeScript with rich outputs like charts and tables, plus state persistence across calls via code contexts, making it better for LLM-generated code.
Yes, sandbox.exposePort(8080) returns a preview URL for HTTP services running in the sandbox. In production, preview URLs require a custom domain with wildcard DNS because the .workers.dev domain does not support preview URL subdomains.
Deployment fails if the Worker entry does not re-export the Sandbox class with export { Sandbox } from '@cloudflare/sandbox'. Also verify wrangler.jsonc includes the containers, durable_objects bindings, and migrations configuration exactly as required.
Extend the base Dockerfile from docker.io/cloudflare/sandbox:0.7.0 with RUN pip install or npm install -g commands for your dependencies. Keep images lean since image size affects container cold start time.
Avoid it if you cannot use Docker for local development, since docker info must succeed. Also avoid hardcoding sandbox IDs for multi-user applications; instead derive IDs from user or session identifiers and call destroy() to free temporary sandboxes.
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