Series

Building a Sandbox IDE

2 parts.

1. Part 1 · Jun 1, 2026

   microVMs and Firecracker

   Why each agent session gets its own Firecracker microVM — the requirements that forced the choice, and the high-level shape of the system from browser to guest.

2. Part 2 · Jun 5, 2026

   Socket Programming

   How the host actually talks to a Firecracker microVM — Unix domain sockets, why a socket is just a file, the curl --unix-socket trick, and Firecracker's one-process-per-VM model.