Project: Code Executor

Role: Author

URL: https://demo-garden.pnetto.com/apps/code-executor.html

What is it?

Runs Python, SQL, Bash, JavaScript, and Deno in a sandboxed container
Isolated execution environment — no persistent state between runs
Hosted as part of Demo Garden, wakes on demand
Similar in concept to Judge0 or Piston, but minimal and self-hosted

Backstory

Built as an experiment in sandboxed execution and as a useful addition to Demo Garden. The goal was a simple tool to run code snippets quickly without spinning up a local environment — useful for testing ideas, demonstrating concepts, or teaching.

The execution environment runs inside a Deno container with restricted access. It became one of the first services hosted on Demo Garden, which made it a good test case for the lazy loader and the broader platform architecture.

Source code: github.com/pnettto/code-executor.

Technical details

Stack

Deno (runtime + sandboxing)
Docker (containerized execution)
Hosted on Demo Garden (AWS EC2 + lazy loader)