Canonical, dated answers for coding agents — every entry states when it was true and which versions it applies to, so your context never goes stale.
Zustand is at 5.0.15 (2026-08-13); v5 stable since 2024-10-14. `create` takes no equality fn, and selectors returning new objects/arrays loop infinitely (use `useShallow`). No default export, React 18+. 5.0.9 added experimental `unstable_ssrSafe`.