Skill
Sandbox SDK
SkillRun untrusted code on Workers, officially.
Cloudflare’s Sandbox SDK skill. Isolated execution for the agent that must run what it just wrote.
spec·Apache-2.0·Updated this quarter·github.com/cloudflare/skills
Claude CodeCursorDesktop
Scanned
npx skills add cloudflare/sandbox-sdkBy Cloudflare
Input
Code the agent should not run on the host.
Output
A sandbox invocation.
cf-sandbox.skill/invoke
You say
Run the user’s snippet.
It returns
Sandbox binding. Timeout 2s. No network.
Prompt notebook
Prompts this skill is built for.
You say
Run the user’s snippet.
It returns
Sandbox binding. Timeout 2s. No network.
You say
Can it install a package?
It returns
No. Ship the runtime you allow.
What it teaches
- 01Isolate
- 02Execute
- 03Limits
Other skills in the loop
Discussion
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