catten is an operating system kernel developed as a key component of the CharlotteOS project but it is designed to be flexible enough that we hope it can also find use in many other places. It seeks to be a monolithic kernel with low-level system call interfaces that borrows ideas from exokernels and other novel systems like Plan 9 and Fuchsia. Its design allows for almost any higher level interface to be layered on top and also includes a typesafe system namespace (akin to the namespaces found in Fuschsia and Plan 9 but more flexible and typesafe) with URIs as paths which has the added benefit of allowing access to the namespace of another host over a network without having to mount anything locally all while being secured by granular capabilities and a persistent mandatory access control policy.

catten is still in early development, and core subsystems are actively being built. We welcome contributions—feel free to grab an issue from the tracker, suggest features, or participate in discussions on our repository, Discord server or Matrix instance.

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