Experimental Ruby library by Ismael Celis for building reactive web apps around commands rather than controllers or background jobs. A Cidurial app is a Rack app (run on Falcon, fiber-based) with typed command structs, a DSL for command-handler blocks, Phlex page classes that know their own path and can subscribe to commands via pub/sub, and a form/button command-helper that transparently submits commands over Ajax. On page load, the browser opens a long-lived SSE connection; POSTed commands are appended to a store interface and the request immediately returns an empty body. Asynchronous worker fibers claim commands, run handlers, and publish the result into a pub/sub channel; subscribed pages re-render (whole page or DOM fragments) and the rendered HTML is pushed back over SSE using Datastar, which morphs it into the DOM (idiomorph-style). Swappable store/dispatcher interfaces let it integrate directly with Sourced. Hosted on Ismael's GitHub; very early/experimental — not intended for production.