I upgraded my version of clojurescript from 293->854 and of hoplon from 6.0.0-alpha17->7.0.2 and now I'm getting some strange errors

WARNING: Wrong number of args (0) passed to cljs.core/atomat line 96 hoplon/app_pages/_index_DOT_html.cljs

Here's the code in question: https://github.com/fiddlerwoaroof/feed-archive/blob/master/src/index.cljs.hl

Time to sleep on this, maybe I'll figure it out tomorrow.

it does seem like something may be wrong in Javelin

however, I’d probably rule that out

this might be the issue: https://github.com/hoplon/hoplon/blob/master/src/hoplon/core.clj#L142

matches the if-tpl in your sources

clojurescript became more strict on validating the arities it seems

yup, that looks like the problem