Cro: Elegant Reactive Services Built with Raku

Cro – elegant reactive services in Raku

Cro: Elegant Reactive Services Built with Raku

I present Cro, a suite of libraries designed to build reactive distributed systems using the Raku language. Our high-level APIs simplify common tasks while the asynchronous pipeline handles complex challenges. Cro includes a robust HTTP server supporting HTTP/2 and Web Sockets, a flexible router, and powerful tooling like cro run for development and cro trace for debugging asynchronous flows.

The high level APIs make the easy things easy, and the asynchronous pipeline concept at Cro's heart makes the hard things possible.

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2026-08-03