Very nice to see parinfer come to Lighttable and see much potential. I tried it out and worked as described, including the plugin dependencies missing message.
One thing I noticed is that it clears the inline results for the entire file when it reformats, but that's probably something in the plan to reformat the current expression only, rather than whole file.
It looks like you were forced to use the npm/js version because lighttable is on old version of cljs. What are the pros/cons of the npm version versus the published cljs version, and do you plan to switch?