API · Context · Get context document by type

Retrieve a single context document by its canonical type key. Most types return the full KnowledgeDoc directly (not the junction wrapper). For content_pillars, the backend reads the Brand Kit’s existing structured ContentPillar records, renders cached Markdown on demand, and returns {doc_type: "content_pillars", content: "..."}. It does not create or synchronize a KnowledgeDoc. If no structured pillars exist, the endpoint returns 404 even when a legacy active context document exists.