At Sequoia's AI Ascent conference, a discussion was held about the limitations of AI agents, including planning, user experience (UX), and memory, with a focus on memory in this particular text. Memory in AI agents is not inherent and must be intentionally integrated, as it plays a crucial role in creating a seamless agent experience, akin to a human remembering past interactions. The text explores different types of memory—procedural, semantic, and episodic—drawing parallels with human memory and discussing their practical application in AI systems. It highlights the challenges and methods of updating memory, either through immediate "in the hot path" techniques or through background processes, each with its advantages and drawbacks. The importance of memory in enhancing agent functionality is emphasized, with LangChain's development efforts aimed at providing flexible memory management tools, such as the Memory Store in LangGraph and dynamic example selection in LangSmith, to optimize agent performance and user interaction.