A frontend newsletter covering five topics: a production health check workflow using observability tools on Netlify, a deep dive into how React's setState works internally (update objects, fiber queues, render scheduling), a tutorial on building a video sharing app, a roundup of 7 new open source AI tools, and two major releases — Vite 8 (now using Rolldown for 10-30x faster builds) and Redwood SDK 1.0 (rebuilt around no-magic, composability, and web-first principles).