Chapter III ·
The standard library
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Lesson 18 of 27
The sandbox
You'll learn: See what's blocked by default — the reason this VM is agent-ready.
This playground runs in a sandboxed VM: dangerous functions
like os.execute, io.open, require, and load are stubbed
to raise. Those are the libraries a host application typically
locks down before exposing a scripting surface to users or
LLMs. *Chapter IV* shows how to expose your *own* safe
functions back into Lua.
Output
idle
Hit Run to execute.
Try it:
Try your own escape —
io.open('/etc/passwd', 'r') or require('os'). Same outcome. Now check the *Embedding* lesson to see how to allow specific paths through.