environments

Demonstrates sandbox environments: build a reusable sandbox image once, then restore from the snapshot on every subsequent run — skipping the setup entirely.

Setup

bunx alineo-cli init   # starts OpenSandbox in Docker (one-time setup)

Run

bun install
bun start        # ~30–60s first run (builds environment)
bun start        # ~2–3s on subsequent runs (restores from snapshot)

What it does

First run — environment not yet cached:

1. Installs Python 3 and pip into a debian:bookworm-slim container
2. Installs numpy and pandas via pip
3. Snapshots the container and saves the snapshot ID to the ledger

Subsequent runs — environment cached:

1. Finds the existing snapshot in the ledger
2. Boots directly from the snapshot — no apt-get or pip install
3. Runs import numpy, pandas to prove packages are already present

The ledger entry is keyed by the environment name ("python-data-science"), so the snapshot is reused across process restarts.