cloture VS lumo

For reference, and to show that it's possible, you might be interested in how I did this for Cloture (Clojure in CL): https://github.com/ruricolist/cloture/blob/master/clojure/core.lisp

Why not use something like https://github.com/ruricolist/cloture (a Clojure "adapter" that runs on Common Lisp) if you want that?

Clojure on Common Lisp: https://github.com/ruricolist/cloture

It does not offer the full experience. It has no breakloop and no ability to browse and edit the live running environment. It has no ability to rummage around inside the dynamic environment of a suspended function call, much less to redefine the suspended function or the types of its parameters, nor to restart the suspended call. Indeed, the JVM makes some of that stuff really inconvenient to do.

You cannot do everything from the Clojure repl in the way you can from a Common Lisp repl or from a Smalltalk worksheet.

I don't know that the Clojure language design forbids it; you might, for example, implement Clojure on top of a Lisp or Smalltalk environment and hook up their tools to Clojure through its interop. That might work, and ruricolist has been working on such an implementation called Cloture:

https://github.com/ruricolist/cloture

But existing Clojure implementations don't have the full set of tools.

Is this similar to Lumo (https://github.com/anmonteiro/lumo)? I would assume Lumo has a faster start time since it boots from a V8 snapshot, but otherwise I'd assume the two projects are similar (except that, of course, lumo is EOL)

Lumo: a standalone ClojureScript environment, runs on Node.js. Doesn't seem to have its own reader conditional, uses :cljs.

Lumo and Planck (standalone Clojurescript environments, based on Node and on JavaScriptCore with some additional functionality to make it suitable for scripting, respectively), and Clojerl (Clojure implemented on BEAM). Startup times are comparable to e.g. Racket.