During July 2025, this developer built a core data-graph capability for the intellistream/SAGE repository, focusing on business value through graph-based insights and visualization. They designed and implemented the KnowledgeGraphIndex class in Python, enabling construction, insertion, deletion, and modification of graph edges and relationships. Leveraging data structures and graph database concepts, they provided full CRUD support for knowledge graph data. The solution integrated NetworkX and Matplotlib to allow rapid visualization, supporting both stakeholder demonstrations and downstream analytics. Delivered as a single, cohesive feature, the work demonstrated depth in data modeling and visualization, though it did not address bug fixes.