Once the hooks land, document them for users and for the Boost skill:

• orderByRelation(), orderByRelationAggregate(), whereRelationAggregate() on Eloquent\Builder and newUnattachedQuery() on BelongsToMany: what they do, that Filament calls them automatically, and that they can be used directly as well
• the MongoDB server floor decided in the lookup-contract ticket and the string key comparison
• update the query-builder reference: ordering by an aggregate is possible through orderByRelationAggregate() (today the skill says to sort the collection with sortBy() instead)
• a short "Using Filament with laravel-mongodb" page listing what works, what needs the hooks, and what stays unsupported (column summaries, reorderable tables, pivot columns)

Filament features covered: all of the above; this is the user-facing summary of the Filament work.