MiniMax M3 is designed for long-horizon agentic work including coding, tool use, task decomposition, and multi-step reasoning, but lacks memory persistence across sessions. This post shows how to integrate Mem0 to give M3 durable memory, allowing each new run to reuse decisions and outcomes from previous runs instead of starting from zero. The demo tracks an app improvement workflow where M3 chooses the next change, records the test result, and Mem0 stores the decision for future continuity.