Auth user type (`@@auth`) is being stripped away by Prisma 6.18.0

[jamiter]

Description and expected behavior
Auth user type (@@auth) is being stripped away by Prisma 6.18.0, probably because it isn't actively used in a model.

If you define the auth user type with a type instead of model, it is no longer added to the "logical-prisma-client". For example:

type AuthUser {
    id     String    @id
    name   String?

    @@auth
}

This will result in an error in the zenstack enhance file:

export namespace auth {
    type WithRequired<T, K extends keyof T> = T & { [P in K]-?: T[P] };
    export type AuthUser = WithRequired<Partial<_P.AuthUser>, 'id'> & Record<string, unknown>;
}

_P.AuthUser will be undefined.

Solution
I think Zenstack should use the generated JSON type (from json-types.ts) when a type is used instead of a model.

Workaround
I had to switch back to using a model and mark it as an external table:

model AuthUser {
    id          String            @id
    name        String?

    @@auth
    @@map("_user_auth_placeholder")
}

// prisma.config.ts

import path from 'node:path';

import { defineConfig, env } from 'prisma/config';

export default defineConfig({
  schema: path.join('schema', 'prisma', 'schema.prisma'),
  migrations: {
    path: path.join('migrations'),
  },
  experimental: {
    externalTables: true,
  },
  tables: {
    external: ['public._user_auth_placeholder'],
  },
});

Environment:

• ZenStack version: 2.21.0
• Prisma version: 6.18.0
• Database type: Postgresql

[ymc9]

Hi @jamiter , just a quick check: did it work with Prisma prior to 6.18?

[jamiter]

@ymc9, yes, it did for me. Probably something changed on the prisma side.

[ymc9]

Fixed in 2.22.0