there is a plugin that can help you there:

(def parser
  (p/parser {::p/plugins [;; add this one at the end of your plugins
                          p/elide-special-outputs-plugin]}))

and nothing wrong with your google-fu, just not well documented

I’m not looking to replace every instance of not found, just the ones I know are nil. Would writing a plugin that replaces something like ::p/nil with nil on output be a reasonable solution?

if you look into the p/elide-special-outputs-plugin, you can copy and modify it

(def elide-special-outputs-plugin
  (post-process-parser-plugin elide-special-outputs))

(defn elide-special-outputs
  "Convert all ::p/not-found values of maps to nil"
  [input]
  (elide-items special-outputs input))

(def special-outputs #{::reader-error ::not-found})

so, something like: (p/post-process-parser-plugin #(elide-items #{::p/not-found} %))

Oh I see! Thank you for the help 🙂

oh, I just see there is p/elide-not-found that does it already