Observability from day one

Teams that defer observability until 'later' rarely get a calm later. Production surprises become archaeology exercises.

Structured logs, request tracing, and business-level metrics should ship with the first vertical slice — not as a pre-launch panic.

Good observability answers three questions fast: what broke, for whom, and since when?

Alert on symptoms users feel, not every internal threshold. Alert fatigue kills on-call morale and hides real incidents.