evlog

evlog is a TypeScript logger built around wide events: you add context to a request as it runs and get one structured event, plus errors that carry a why and a fix, in scripts, frameworks, edge runtimes and the browser. Its CLI scans supported frameworks such as Next.js and Nuxt for routes that log nothing and scores the gaps, and logs can be written as NDJSON for coding agents to read. Reach for it when a production bug keeps hiding behind scattered log lines.