A JavaScript library for building user interfaces.

Sentry is a cutting-edge application monitoring platform that helps developers identify, triage, and fix software errors and performance bottlenecks in real time. Unlike traditional logging tools that require manual searching, Sentry proactively captures crashes and exceptions across the entire stack—from frontend JavaScript to backend Python or Go. In 2026, it has further evolved with Seer, its built-in AI debugging agent, which can automatically suggest code fixes and provide deep context like "suspect commits" or session replays. By showing exactly what a user did before a crash occurred, Sentry allows engineering teams to move from "something is broken" to a verified fix in minutes rather than hours.

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