The goal is to allow data from Wikidata - both ontological and lexicographic data - to be used in Wikifunctions functions - ideally both in code and in composition.
There seem to be two main sources of data: either to access an individual entity based on the ID (that seems to be covered by subtask T307515 ) but also to be able to navigate and aggregate over the graph (access to individual entities only allows unidirectional navigation, which is very limiting). For navigation and aggregation it seems that an interface to send SPARQL queries and use the results would be good.
Some relevant tasks and documents:
@Lydia_Pintscher has tons of documents on T67626