During July 2025, this developer built a core data-graph capability for the intellistream/SAGE repository, focusing on enabling business insights through graph-based data modeling and visualization. They designed and implemented the KnowledgeGraphIndex class in Python, providing CRUD operations for managing knowledge graph edges and relationships. Leveraging data structures and graph database concepts, they integrated NetworkX and Matplotlib to support visualization, allowing for rapid inspection and stakeholder demonstrations. The work demonstrated end-to-end delivery from data modeling to visualization, laying the groundwork for downstream analytics and search enhancements. The feature was delivered in a single commit, reflecting focused and in-depth engineering.