Sentry + Next.js: Complete Error Monitoring Guide (2026)

Most Next.js apps go to production with no idea what's actually failing for users. console.error doesn't reach you, Vercel logs have minified stack traces, and you find out about errors when a user reports them. Sentry fixes this — but the App Router setup has enough gotchas that a "quick install" turns into an afternoon. npx @sentry/wizard@latest -i nextjs The wizard creates the three config files, wraps next.config.ts, generates instrumentation.ts and global-error.tsx, and sets up source map u