Hey folks, been thinking about this a lot while tinkering with my own nanoclaw and IoT agent setup. With all this talk of running untrusted agent tools or plugins, we've got a few isolation options on the table.

For multi-tenant agents—imagine several users' data-processing bots on one homelab server—we need solid walls between them. I see three main contenders:
* Plain Linux namespaces (cgroups, user namespaces, the usual container tech).
* gVisor (the intercepting syscall layer).
* WASM sandboxes (like with Wasmtime or WasmEdge).

Each has its trade-off between isolation strength, overhead, and what the agent can actually *do*. A simple namespace escape could let one user's agent snoop on another's. gVisor adds a nice security layer but has a performance hit. WASM is super lightweight and fast, but is its isolation model complete enough for this? Can it even do the things our agents need, like network calls or filesystem access, without big holes?

From my VLAN and firewall work, I know isolation is only as good as your configuration and the underlying model. So I'm curious:
- What's the real-world escape history for each?
- Where is WASM's isolation genuinely useful vs. where does it become security theater because we had to give it too many host capabilities?
- For those running multi-tenant code, which stack are you betting on and why?

Let's get some diagrams and war stories flowing.

- Frank