This was so much fun for me. First time manipulating an implementation of Graphiql! I got a few hours of flow state out of this because one of the hold-ups was that OneGraph has such a pervasive set of subgraphs and that made the explorer pane too busy to really use. The nice and juicy problem was iteratively pruning a few thousand GraphQL types while keeping the schema valid.
https://github.com/open-sauced/explore.opensauced.pizza/pull/2