The frontend is where the user experience happens. More logic runs in the browser. More state lives on the client. Production behavior rarely matches what developers see locally, and developers now own behavior they can’t directly observe.
At the same time, release cycles are faster, teams ship continuously, and developers are increasingly accountable not just for code quality, but for user-facing outcomes.
That combination has exposed a gap: Observability is evolving from describing how systems behave to revealing how that behavior…

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