Add Tracekit APM for monitoring. Install @tracekit/node-apm. In the Express backend, add before routes: import * as tracekit from ‘@tracekit/node-apm’; const client = tracekit.init({ apiKey: process.env.TRACEKIT_API_KEY, serviceName: ‘my-replit-app’, endpoint: ‘https://app.tracekit.dev/v1/traces’, enableCodeMonitoring: true, }); app.use(tracekit.middleware()); If this app has auth, add metrics: – const signupCounter = client.counter(‘user.signups.total’); – const loginCounter = client.counter(‘user.logins.total’); – Call signupCounter.inc() after user creation – Call loginCounter.inc() after successful login For custom metrics: client.counter(‘events.total’).inc() For manual traces: const span = client.startSpan(‘operation’); client.endSpan(span); For snapshots on critical paths: await client.captureSnapshot(‘payment’, { data });

Add Tracekit APM for monitoring. Install tracekit-apm with pip. In the Flask app, add before routes: from tracekit import Tracekit import os tracekit = Tracekit( api_key=os.environ.get(‘TRACEKIT_API_KEY’), service_name=’my-replit-app’, endpoint=’https://app.tracekit.dev/v1/traces’ ) # Initialize with Flask app tracekit.init_app(app) If this app has auth, add metrics: – signup_counter = tracekit.counter(‘user.signups.total’) – login_counter = tracekit.counter(‘user.logins.total’) – Call signup_counter.inc() after user creation – Call login_counter.inc() after successful login For custom metrics: tracekit.counter(‘events.total’).inc() For manual traces: with tracekit.start_span(‘operation’) as span: … For snapshots: tracekit.capture_snapshot(‘payment’, {‘data’: data})