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The React framework for full-stack web applications. 3 topics track how coding agents behave in Next.js codebases — the failure modes, the workflows, and the configs that keep them honest.
Server components by default, one blessed data-fetching pattern, and hard rules about 'use client'. This file exists because every one of those rules was violated by an agent first.
Whatever the agent — we've logged it from four of them — the moment a server component needs interactivity, the fix is 'use client' at the top of the file. Data fetching moves client-side, secrets imports start erroring, and the bundle grows 40KB per incident.
Five days, two agents, one working Stripe billing portal: what was delegated, what broke, what it cost ($61.40 all-in), and the day everything went sideways.