Yes! This reminds me strongly of the core/modules architecture of the apache httpd, as described by the excellent O'Reilly book on it. The process of serving a

Yes! This reminds me strongly of the core/modules architecture of the apache httpd, as described by the excellent O'Reilly book on it. The process of serving an HTTP request is broken into a large number of fine grained stages and plugin modules may hook into any or all of these to modify the input and output to each stage. The same basic idea makes it easy to turn any application concept into a modules-and-core architecture. From the day I read (skimmed) that book a decade or two ago this pattern has been burned into my brain