Personal KG is an MCP server designed to combat context evaporation in multi-agent development. It automatically captures and preserves the 'why' behind every decision, including full reasoning chains, alternatives considered, constraints, and the evolution of ideas. By transforming fragmented tasks into rich, context-aware operations, Personal KG enables continuous learning, enhances accountability, and improves the auditability of AI agent actions, ensuring agents operate with a full understanding of project history and objectives.