Sessions, 2FA, org roles and metered billing as a drop-in module, not a whole app.
Verity is the auth and billing plumbing extracted from our own product. It is a module you mount, not an application you inherit — bring your own routes, layouts and design.
Email and password with verification, TOTP second factor, social providers behind toggles, organisation roles with granular permissions, and metered billing with a webhook processor that is safe to replay.
I have my own design system and did not want a whole starter. Verity mounted into an existing app in an afternoon and imposed nothing.
The permission resolver is powerful and the documentation for it reads like a spec. Worked it out, but a worked example would have halved the time.