Category · 2 posts

Next.js

App Router patterns, server components, build pitfalls, and the Next.js 16 specifics that bite during production launches.

Next.jsApr 26, 2026

Why your Next.js 16 build crashes on a missing env var and a 5-line Proxy fix

Your production build fails with 'Missing API_KEY' but your runtime works fine. Here is why Next.js collects page data at build time, why naive fixes do not work, and the lazy Proxy pattern that ends it.

9 min read

Next.jsFeb 14, 2026

Next.js App Router auth that does not fight Server Components

Sessions in cookies, middleware timing, route handlers, and the refresh flow that stops mystery 401s.

9 min read