Having [[ https://github.com/wikimedia/wikimedia-page-library | wikimedia-page-library ]] as a standalone repository and node module no longer makes sense now that it's ingested and distributed to the clients through the Page Content Service.
More importantly, having a subset of transforms defined in a separate project means that those transforms can't be easily updated to take advantage of facilities in mobileapps that allow limiting the amount of work performed per event loop cycle. This is especially important in light of ongoing service instability ({T229286}) ever since we began pregenerating PCS responses. The data point to the underlying issue being event loop blockage. We can't effectively move forward on resolving that task without consolidating the page library transforms.