Each section covers one release, newest first. Read the sections between your current version and the latest. The docs describe the latest published release.
0.2.0
Additive: nothing to change in your code when you move up from 0.1.0. Before 1.0 a caret range doesn’t cross minors, so widen ^0.1.0 to ^0.2.0. The new curried form, defineEntitlements<PlanCopy>()({ ... }), which checks every plan’s display against one interface, is optional; see Catalog. The docs also now say how deleteOrganizationData behaves on SQL, that an "unlimited" limit reports "unlimited" rather than a number, and that consumeUsage counts on an unlimited limit.
0.1.0
The first release. There is nothing to upgrade from: follow the Quickstart. It needs better-auth 1.7.7 or newer, better-call 1.4 or newer, @better-auth/core at the same version as better-auth, and zod 4.