Let's discuss sandbox isolation

There is a lot of energy right now around sandboxing untrusted code. AI agents generating and executing code, multi-tenant platforms running customer scripts, RL training pipelines evaluating model outputs—basically, you have code you did not write, and you need to run it without letting it compromise the host, other tenants, or itself in unexpected ways.
The word “isolation” gets used loosely. A Docker container is “isolated.” A microVM is “isolated.” A WebAssembly module is “isolated.