Day 10 – Memory In Agents (short-term Vs Long-term)

Why Memory Is What Makes Agents Feel “Intelligent” 🧠 An agent that forgets everything after each step is not intelligent — it’s reactive. Memory allows agents to: maintain context learn from past actions avoid repeating mistakes personalize behavior In simple terms: Reasoning decides what to do. Memory decides why and based on what. Most weak agents fail not because they reason poorly — but because they remember poorly. The Two Fundamental Types of Memory All agent memory systems boil down to two categories: Memory Type Purpose Lifetime Short-term memory Current context & state Minutes–hours Long-term memory Knowledge & experience Days–years They solve very different problems. 1️⃣ Short-Term Memory: Working Context What Short-Term Memory Holds Short-term memory includes: recent user messages intermediate reasoning steps tool outputs current plan state Think of it as the agent’s working scratchpad. Typical Implementation Conversation History + Tool Results + State Variables This memory