Wrapping the existing code in hooks of some sort to enable injecting profiling or whatever is really quite nice. A lot of javascript hot reloading implementati

Wrapping the existing code in hooks of some sort to enable injecting profiling or whatever is really quite nice. A lot of javascript hot reloading implementations rely on using Babel to do that as part of a build step so they output the wrapped code and your app loads that instead (and it's not that dissimilar to compilers having a debug mode where they output very different code). I would certainly side-eye you for using the relevant common lisp hooks in production without a very convincing reason, but for many development time tasks it's basically the civilised version of widely used techniques.