Kern

Judgement

What it is

Developer tool

What it does

A rootless, daemonless container runtime in one static binary that starts kernel-isolated containers in milliseconds, aimed at running AI agent tool calls and generated code, with an MCP server.

Adopt it when

You run code produced by an LLM agent on Linux and want it sandboxed in real containers without a Docker daemon or root.

Watch out

It is under four months old, so its isolation has not had the scrutiny that runc, gVisor or Firecracker have.

Ready for

Experimental

Runs as

Command line and self-hosted server

Built with

Rust, Linux namespaces, cgroups and OCI

How established

New: started 3 months ago, latest release v0.33.0.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Kern → Rust → runs on a microchip

How compilers were built, back to punched paper tape

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