Sorry to say, but this has nothing to do with custom development. As long as you want to feed elasticsearch with phabricator events, my feature request/suggestion was to do it in a way that is usable by elasticsearch-friendly tools without resorting to hacks and customizations on the elasticsearch side ( which is ok to do at some extent, but right now leaves phabricator in a state requesting to fix index mappings on the elasticsearch side - at least).

Hi epriestley,
just added all relevant details. Everything is on the task now.

Hi epriestley,
I switched this to Feature Request and added Elasticsearch on the projects lists.