Why Your MongoDB Check in Next.js Middleware Might Be Silently Failing
I mentioned this briefly in an earlier post on middleware patterns, that direct database queries don't run reliably in middleware, and a few people…
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Next.js 15 Middleware: Auth, Rate Limiting & Edge Guide
Middleware is the most underused primitive in Next.js. Teams write one middleware for auth, ship it, and never touch it again. Meanwhile, they bolt…
Understanding Middleware in Deep Agents (With Runnable Examples)
If you've built even a simple AI agent, you've probably noticed that the "agent loop" itself is deceptively simple: the model gets a message, decide…
FastAPI Middleware Error Recovery: Preventing One Broken Tenant from Taking Down Your Entire SaaS
FastAPI Middleware Error Recovery: Preventing One Broken Tenant from Taking Down Your Entire SaaS I learned this lesson the hard way at 2 AM when a…
FastAPI Middleware Ordering: Why Your CORS, Auth, and Tenant Context Stack Matters in Production
FastAPI Middleware Ordering: Why Your CORS, Auth, and Tenant Context Stack Matters in Production I spent three days debugging why JWT validation was…