From Express.js to Agent Express: why middleware...

I wanted to add memory management to my agent. In one framework, that meant learning about "memory modules," "memory backends," "retriever chains," and "buffer window" classes. In another, I needed a "processor" config object nested three levels deep. I sat there staring at documentation tabs and thought: this is just middleware. Intercept the context before the model call, trim old messages, pass control downstream. Every web developer has written this pattern a hundred times. That realization