@kopperThis is what I am planning to do to deal with huge inboxes: https://codeberg.org/mushroomlabs/django-activitypub-toolkit/issues/31As for SPARQL/GraphQL: yes, if I am syncing all the data (that I want) to my local database, I'd implement the query engine *in the local client*. And I am not even thinking about discarding anything. JSON can compress nicely, so I'd keep an actual database for the indexing and JSON-LD documents as a local archive.