Error Monitoring in Production: Beyond console.log

The Gap Between Dev and Prod In development, errors are visible. In production, they're silent. A user hits a bug, refreshes, gives up. You never know. Until enough users give up that your retention numbers drop. Error monitoring closes that gap. Sentry: The Standard npm install @sentry/nextjs # or npm install @sentry/node // sentry.server.config.ts import * as Sentry from '@sentry/nextjs'; Sentry.init({ dsn: process.env.SENTRY_DSN, environment: process.env.NODE_ENV, tracesSampleRate: process.env.NODE_ENV === 'production' ? 0.1 : 1.0, // Filter out noise ignoreErrors: [ 'ResizeObserver loop limit exceeded', /^Network Error/, ], beforeSend(event, hint) { // Don't send errors from bots const ua = event.request?.headers?.['user-agent'] ?? ''; if (/bot|crawler|spider/i.test(ua)) return null; return event; }, }); Capturing Errors with Context try { await processPayment(userId, amount); } catch (error) { Sentry.withScope((scope) => { scope.setUser({ id: userId, email: user.email }); scope