Your carefully-tuned agent forgets everything by morning. The problem isn't the model — it's your architecture. A 50-line Loop Agent that remembers.
The Pain: You spent an afternoon tuning your agent. Next morning, it stares at you blankly — as if yesterday never happened.
What You'll Learn: The 4-stage evolution (Prompt → Context → Harness → Loop), and a runnable 50-line Loop Agent that persists memory.
0. Prerequisites
Python ≥ 3.10
pip install openai (openai ≥ 1.0.0)
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