For a uninitiated reader of the documentation it does not seem clear how "WikibaseRepo" and "WikibaseClient" components related to the overall architecture.

It potentially is meant to become visible at Overall Building Block view (https://wmde.github.io/wikidata-wikibase-architecture/systems/overview/05-Building_Block_View.html) but those two components are currently not represented there.

Mentioned of these components in the overall Content and scope part (https://wmde.github.io/wikidata-wikibase-architecture/systems/overview/03-Context_and_Scope.html) does not seem to be sufficient either (what those components are, what for, where do they become relevant, etc)

I am aware of T272382 but that task seems to be about a very special and different aspect of documenting those two component.