From the README

# Astrid

**Software should compose without inheriting each other's authority.**

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Astrid is an operating-system project for software built from WebAssembly
**capsules**. Today it runs as a portable user-space runtime on macOS and Linux;
the direction is a standalone operating system. This release is the hosted
runtime, not a bootable OS image.

Run components in a sandbox, connect them through typed interfaces, and give
each principal its own capabilities and durable state. Install, upgrade, and
remove capsules while the runtime is running.

Use it to build agent systems, tools, services, or your own distribution. Astrid
does not choose a product, model provider, agent loop, or user interface for you.

Agents make the problem urgent: a model can choose what to do, but that should
not make the model the authority that permits it. Astrid separates those jobs.
The same foundation serves software without an LLM—components can be replaced
and composed without putting application policy