Letta (formerly MemGPT) enables the creation of stateful AI agents with long-term memory. Its OS-like framework manages the context window of LLMs, allowing agents to 'remember' user interactions and data over indefinite periods. Letta is critical for building perpetual assistants and personalized AI applications that need to retain a coherent history of the user. This technology addresses critical bottlenecks in computational efficiency and data governance, supporting broader industrial automation.