CLERK CORE 3: REDESIGNED HOOKS, SMALLER BUNDLES, AGENT-READY APIS

Summary from the TLDR Dev newsletter

Clerk Core 3 ships today. Redesigned useSignIn, useSignUp, and useCheckout hooks with cleaner state management, ~50KB bundle savings, satelliteAutoSync to eliminate unnecessary handshake redirects, and keyless mode now extended to TanStack Start, Astro, and React Router.