interactive-exec

Demonstrates sb.exec(cmd, { interactive: true }): a live, bidirectional PTY session that can be driven like a human — and resumed like one too.

Setup

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

Run

bun install
bun start

What it does

1. Creates an ubuntu:22.04 sandbox and opens an interactive bash session
2. Drives it with several write() calls — exports a var, cds into a directory, writes a file — none of which is a single self-contained command
3. Checkpoints the sandbox while the shell is still open (not after it exits)
4. Resumes from that checkpoint into a new sandbox
5. Opens the same interactive exec again at the same call site — the resume path detects the session was still open, replays its recorded stdin for real against the freshly restored filesystem, then hands control back live
6. Asserts the cd, the file contents, and the exported variable all survived — reconstructed by re-running the recorded input, not by faking a transcript
7. Exits the shell and asserts the interactive exec resolves with the process's real exit code

OpenSandbox snapshots are rootfs-only (no CRIU) — the original bash process is provably gone after resume. Reconstructing shell state is only possible by replaying the stdin that produced it.