Teardown Finds Both Claude Code Mobile and Instinct Run on Firecracker MicroVMs, but Put the Inference Engine on Opposite Sides of the Boundary

Rohan Adwankar / Hacker News (77pts)·low signalXBlueskyLinkedInCopy link

The post compares the two sandbox stacks: Claude Code boots in ~430ms with a custom Rust init as PID 1, a stripped kernel, a 324MB compiled Bun binary as the harness, conversation state on disk and OAuth tokens rotated per boot. Instinct takes ~1.26s to a graphical desktop on full Ubuntu 22.04.5 with systemd, 2 vCPU, 1.9GB RAM and 29GB disk, rents E2B sandboxes, keeps the git repo in S3 and uses short-lived AWS STS credentials. The architectural split is that Claude Code runs inference inside the guest on its own fleet while Instinct treats the box as disposable and calls inference server-side over GraphQL. The post carries no visible publication date.