Frontend Reliability & SLOs

Frontend reliability extends observability with user-facing SLOs, error budgets, and client-side failure handling — because users experience your app in browsers, not Kubernetes pods.

This module covers client SLIs (LCP, INP, error rate), error budget release policies, RUM instrumentation, graceful degradation, client circuit breakers, incident playbooks, MFE error boundaries, and kill switches.

Staff candidates define what good looks like in production, segment SLOs by region and device, and design mitigations before incidents happen.

Builds on Observability (Module 13) with frontend-specific operational depth.