diff --git a/packages/better-auth/src/adapters/adapter-factory/index.ts b/packages/better-auth/src/adapters/adapter-factory/index.ts
index 94a875f0..050b6831 100644
--- a/packages/better-auth/src/adapters/adapter-factory/index.ts
+++ b/packages/better-auth/src/adapters/adapter-factory/index.ts
@@ -14,7 +14,7 @@ import type {
 	AdapterTestDebugLogs,
 	CleanedWhere,
 } from "./types";
-import type { FieldAttribute } from "../../db";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 export * from "./types";
 
 let debugLogs: any[] = [];
@@ -303,7 +303,7 @@ export const createAdapterFactory =
 							},
 						}
 					: {}),
-			} satisfies FieldAttribute;
+			} satisfies DBFieldAttribute;
 		};
 
 		const getFieldAttributes = ({
diff --git a/packages/better-auth/src/adapters/adapter-factory/types.ts b/packages/better-auth/src/adapters/adapter-factory/types.ts
index a5ce9832..48249fe4 100644
--- a/packages/better-auth/src/adapters/adapter-factory/types.ts
+++ b/packages/better-auth/src/adapters/adapter-factory/types.ts
@@ -1,5 +1,5 @@
-import type { FieldAttribute } from "../../db";
-import type { BetterAuthDbSchema } from "../../db/get-tables";
+import type { DBFieldAttribute } from "@better-auth/core/db";
+import type { BetterAuthDBSchema } from "@better-auth/core/db";
 import type {
 	AdapterSchemaCreation,
 	BetterAuthOptions,
@@ -164,7 +164,7 @@ export interface AdapterFactoryConfig {
 		/**
 		 * The fields of the model.
 		 */
-		fieldAttributes: FieldAttribute;
+		fieldAttributes: DBFieldAttribute;
 		/**
 		 * The field to transform.
 		 */
@@ -180,7 +180,7 @@ export interface AdapterFactoryConfig {
 		/**
 		 * The schema of the user's Better-Auth instance.
 		 */
-		schema: BetterAuthDbSchema;
+		schema: BetterAuthDBSchema;
 		/**
 		 * The options of the user's Better-Auth instance.
 		 */
@@ -196,7 +196,7 @@ export interface AdapterFactoryConfig {
 		/**
 		 * The fields of the model.
 		 */
-		fieldAttributes: FieldAttribute;
+		fieldAttributes: DBFieldAttribute;
 		/**
 		 * The field to transform.
 		 */
@@ -212,7 +212,7 @@ export interface AdapterFactoryConfig {
 		/**
 		 * The schema of the user's Better-Auth instance.
 		 */
-		schema: BetterAuthDbSchema;
+		schema: BetterAuthDBSchema;
 		/**
 		 * The options of the user's Better-Auth instance.
 		 */
@@ -246,7 +246,7 @@ export type AdapterFactoryCustomizeAdapterCreator = (config: {
 	/**
 	 * The schema of the user's Better-Auth instance.
 	 */
-	schema: BetterAuthDbSchema;
+	schema: BetterAuthDBSchema;
 	/**
 	 * The debug log function.
 	 *
@@ -303,7 +303,7 @@ export type AdapterFactoryCustomizeAdapterCreator = (config: {
 	}: {
 		model: string;
 		field: string;
-	}) => FieldAttribute;
+	}) => DBFieldAttribute;
 }) => CustomAdapter;
 
 export interface CustomAdapter {
@@ -377,7 +377,7 @@ export interface CustomAdapter {
 		/**
 		 * The tables from the user's Better-Auth instance schema.
 		 */
-		tables: BetterAuthDbSchema;
+		tables: BetterAuthDBSchema;
 	}) => Promise<AdapterSchemaCreation>;
 	/**
 	 * Your adapter's options.
diff --git a/packages/better-auth/src/adapters/utils.ts b/packages/better-auth/src/adapters/utils.ts
index 2526795a..8be8cc7d 100644
--- a/packages/better-auth/src/adapters/utils.ts
+++ b/packages/better-auth/src/adapters/utils.ts
@@ -1,8 +1,8 @@
-import type { FieldAttribute } from "../db";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 
 export function withApplyDefault(
 	value: any,
-	field: FieldAttribute,
+	field: DBFieldAttribute,
 	action: "create" | "update",
 ) {
 	if (action === "update") {
diff --git a/packages/better-auth/src/db/field.ts b/packages/better-auth/src/db/field.ts
index b66cef58..b9b58fa1 100644
--- a/packages/better-auth/src/db/field.ts
+++ b/packages/better-auth/src/db/field.ts
@@ -1,118 +1,13 @@
-import type { ZodType } from "zod";
+import type {
+	DBFieldAttribute,
+	DBFieldAttributeConfig,
+	DBFieldType,
+} from "@better-auth/core/db";
 import type { BetterAuthOptions } from "../types";
-import type { LiteralString } from "../types/helper";
-
-export type FieldType =
-	| "string"
-	| "number"
-	| "boolean"
-	| "date"
-	| "json"
-	| `${"string" | "number"}[]`
-	| Array<LiteralString>;
-
-type Primitive =
-	| string
-	| number
-	| boolean
-	| Date
-	| null
-	| undefined
-	| string[]
-	| number[];
-
-export type FieldAttributeConfig<T extends FieldType = FieldType> = {
-	/**
-	 * If the field should be required on a new record.
-	 * @default true
-	 */
-	required?: boolean;
-	/**
-	 * If the value should be returned on a response body.
-	 * @default true
-	 */
-	returned?: boolean;
-	/**
-	 * If a value should be provided when creating a new record.
-	 * @default true
-	 */
-	input?: boolean;
-	/**
-	 * Default value for the field
-	 *
-	 * Note: This will not create a default value on the database level. It will only
-	 * be used when creating a new record.
-	 */
-	defaultValue?: Primitive | (() => Primitive);
-	/**
-	 * Update value for the field
-	 *
-	 * Note: This will create an onUpdate trigger on the database level for supported adapters.
-	 * It will be called when updating a record.
-	 */
-	onUpdate?: () => Primitive;
-	/**
-	 * transform the value before storing it.
-	 */
-	transform?: {
-		input?: (value: Primitive) => Primitive | Promise<Primitive>;
-		output?: (value: Primitive) => Primitive | Promise<Primitive>;
-	};
-	/**
-	 * Reference to another model.
-	 */
-	references?: {
-		/**
-		 * The model to reference.
-		 */
-		model: string;
-		/**
-		 * The field on the referenced model.
-		 */
-		field: string;
-		/**
-		 * The action to perform when the reference is deleted.
-		 * @default "cascade"
-		 */
-		onDelete?:
-			| "no action"
-			| "restrict"
-			| "cascade"
-			| "set null"
-			| "set default";
-	};
-	unique?: boolean;
-	/**
-	 * If the field should be a bigint on the database instead of integer.
-	 */
-	bigint?: boolean;
-	/**
-	 * A zod schema to validate the value.
-	 */
-	validator?: {
-		input?: ZodType;
-		output?: ZodType;
-	};
-	/**
-	 * The name of the field on the database.
-	 */
-	fieldName?: string;
-	/**
-	 * If the field should be sortable.
-	 *
-	 * applicable only for `text` type.
-	 * It's useful to mark fields varchar instead of text.
-	 */
-	sortable?: boolean;
-};
-
-export type FieldAttribute<T extends FieldType = FieldType> = {
-	type: T;
-} & FieldAttributeConfig<T>;
 
 export const createFieldAttribute = <
-	T extends FieldType,
-	C extends Omit<FieldAttributeConfig<T>, "type">,
+	T extends DBFieldType,
+	C extends DBFieldAttributeConfig,
 >(
 	type: T,
 	config?: C,
@@ -120,10 +15,10 @@ export const createFieldAttribute = <
 	return {
 		type,
 		...config,
-	} satisfies FieldAttribute<T>;
+	} satisfies DBFieldAttribute<T>;
 };
 
-export type InferValueType<T extends FieldType> = T extends "string"
+export type InferValueType<T extends DBFieldType> = T extends "string"
 	? string
 	: T extends "number"
 		? number
@@ -141,7 +36,7 @@ export type InferValueType<T extends FieldType> = T extends "string"
 
 export type InferFieldsOutput<Field> = Field extends Record<
 	infer Key,
-	FieldAttribute
+	DBFieldAttribute
 >
 	? {
 			[key in Key as Field[key]["required"] extends false
@@ -158,7 +53,7 @@ export type InferFieldsOutput<Field> = Field extends Record<
 
 export type InferFieldsInput<Field> = Field extends Record<
 	infer Key,
-	FieldAttribute
+	DBFieldAttribute
 >
 	? {
 			[key in Key as Field[key]["required"] extends false
@@ -181,7 +76,7 @@ export type InferFieldsInput<Field> = Field extends Record<
  */
 export type InferFieldsInputClient<Field> = Field extends Record<
 	infer Key,
-	FieldAttribute
+	DBFieldAttribute
 >
 	? {
 			[key in Key as Field[key]["required"] extends false
@@ -202,18 +97,18 @@ export type InferFieldsInputClient<Field> = Field extends Record<
 		}
 	: {};
 
-type InferFieldOutput<T extends FieldAttribute> = T["returned"] extends false
+type InferFieldOutput<T extends DBFieldAttribute> = T["returned"] extends false
 	? never
 	: T["required"] extends false
 		? InferValueType<T["type"]> | undefined | null
 		: InferValueType<T["type"]>;
 
 /**
- * Converts a Record<string, FieldAttribute> to an object type
- * with keys and value types inferred from FieldAttribute["type"].
+ * Converts a Record<string, DBFieldAttribute> to an object type
+ * with keys and value types inferred from DBFieldAttribute["type"].
  */
 export type FieldAttributeToObject<
-	Fields extends Record<string, FieldAttribute>,
+	Fields extends Record<string, DBFieldAttribute>,
 > = AddOptionalFields<
 	{
 		[K in keyof Fields]: InferValueType<Fields[K]["type"]>;
@@ -223,7 +118,7 @@ export type FieldAttributeToObject<
 
 type AddOptionalFields<
 	T extends Record<string, any>,
-	Fields extends Record<keyof T, FieldAttribute>,
+	Fields extends Record<keyof T, DBFieldAttribute>,
 > = {
 	// Required fields: required === true
 	[K in keyof T as Fields[K] extends { required: true } ? K : never]: T[K];
@@ -244,14 +139,14 @@ export type InferAdditionalFieldsFromPluginOptions<
 	Options extends {
 		schema?: {
 			[key in SchemaName]?: {
-				additionalFields?: Record<string, FieldAttribute>;
+				additionalFields?: Record<string, DBFieldAttribute>;
 			};
 		};
 	},
 	isClientSide extends boolean = true,
 > = Options["schema"] extends {
 	[key in SchemaName]?: {
-		additionalFields: infer Field extends Record<string, FieldAttribute>;
+		additionalFields: infer Field extends Record<string, DBFieldAttribute>;
 	};
 }
 	? isClientSide extends true
@@ -259,14 +154,14 @@ export type InferAdditionalFieldsFromPluginOptions<
 		: FieldAttributeToObject<Field>
 	: {};
 
-type RemoveFieldsWithInputFalse<T extends Record<string, FieldAttribute>> = {
+type RemoveFieldsWithInputFalse<T extends Record<string, DBFieldAttribute>> = {
 	[K in keyof T as T[K]["input"] extends false ? never : K]: T[K];
 };
 
-type InferFieldInput<T extends FieldAttribute> = InferValueType<T["type"]>;
+type InferFieldInput<T extends DBFieldAttribute> = InferValueType<T["type"]>;
 
 export type PluginFieldAttribute = Omit<
-	FieldAttribute,
+	DBFieldAttribute,
 	"transform" | "defaultValue" | "hashValue"
 >;
 
diff --git a/packages/better-auth/src/db/get-migration.ts b/packages/better-auth/src/db/get-migration.ts
index 99742f9b..d7f68c9c 100644
--- a/packages/better-auth/src/db/get-migration.ts
+++ b/packages/better-auth/src/db/get-migration.ts
@@ -2,7 +2,7 @@ import type {
 	AlterTableColumnAlteringBuilder,
 	CreateTableBuilder,
 } from "kysely";
-import type { FieldAttribute, FieldType } from ".";
+import type { DBFieldAttribute, DBFieldType } from "@better-auth/core/db";
 import { sql } from "kysely";
 import { createLogger } from "../utils/logger";
 import type { BetterAuthOptions } from "../types";
@@ -66,7 +66,7 @@ const map = {
 
 export function matchType(
 	columnDataType: string,
-	fieldType: FieldType,
+	fieldType: DBFieldType,
 	dbType: KyselyDatabaseType,
 ) {
 	function normalize(type: string) {
@@ -104,12 +104,12 @@ export async function getMigrations(config: BetterAuthOptions) {
 	const tableMetadata = await db.introspection.getTables();
 	const toBeCreated: {
 		table: string;
-		fields: Record<string, FieldAttribute>;
+		fields: Record<string, DBFieldAttribute>;
 		order: number;
 	}[] = [];
 	const toBeAdded: {
 		table: string;
-		fields: Record<string, FieldAttribute>;
+		fields: Record<string, DBFieldAttribute>;
 		order: number;
 	}[] = [];
 
@@ -141,7 +141,7 @@ export async function getMigrations(config: BetterAuthOptions) {
 			}
 			continue;
 		}
-		let toBeAddedFields: Record<string, FieldAttribute> = {};
+		let toBeAddedFields: Record<string, DBFieldAttribute> = {};
 		for (const [fieldName, field] of Object.entries(value.fields)) {
 			const column = table.columns.find((c) => c.name === fieldName);
 			if (!column) {
@@ -171,7 +171,7 @@ export async function getMigrations(config: BetterAuthOptions) {
 		| CreateTableBuilder<string, string>
 	)[] = [];
 
-	function getType(field: FieldAttribute, fieldName: string) {
+	function getType(field: DBFieldAttribute, fieldName: string) {
 		const type = field.type;
 		const typeMap = {
 			string: {
diff --git a/packages/better-auth/src/db/get-schema.ts b/packages/better-auth/src/db/get-schema.ts
index 5bee962f..48772e21 100644
--- a/packages/better-auth/src/db/get-schema.ts
+++ b/packages/better-auth/src/db/get-schema.ts
@@ -1,19 +1,20 @@
-import { getAuthTables, type FieldAttribute } from ".";
+import { getAuthTables } from ".";
 import type { BetterAuthOptions } from "../types";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 
 export function getSchema(config: BetterAuthOptions) {
 	const tables = getAuthTables(config);
 	let schema: Record<
 		string,
 		{
-			fields: Record<string, FieldAttribute>;
+			fields: Record<string, DBFieldAttribute>;
 			order: number;
 		}
 	> = {};
 	for (const key in tables) {
 		const table = tables[key]!;
 		const fields = table.fields;
-		let actualFields: Record<string, FieldAttribute> = {};
+		let actualFields: Record<string, DBFieldAttribute> = {};
 		Object.entries(fields).forEach(([key, field]) => {
 			actualFields[field.fieldName || key] = field;
 			if (field.references) {
diff --git a/packages/better-auth/src/db/get-tables.ts b/packages/better-auth/src/db/get-tables.ts
index 4a416c94..438734f8 100644
--- a/packages/better-auth/src/db/get-tables.ts
+++ b/packages/better-auth/src/db/get-tables.ts
@@ -1,32 +1,12 @@
-import type { FieldAttribute } from ".";
 import type { BetterAuthOptions } from "../types";
-
-export type BetterAuthDbSchema = Record<
-	string,
-	{
-		/**
-		 * The name of the table in the database
-		 */
-		modelName: string;
-		/**
-		 * The fields of the table
-		 */
-		fields: Record<string, FieldAttribute>;
-		/**
-		 * Whether to disable migrations for this table
-		 * @default false
-		 */
-		disableMigrations?: boolean;
-		/**
-		 * The order of the table
-		 */
-		order?: number;
-	}
->;
+import type {
+	BetterAuthDBSchema,
+	DBFieldAttribute,
+} from "@better-auth/core/db";
 
 export const getAuthTables = (
 	options: BetterAuthOptions,
-): BetterAuthDbSchema => {
+): BetterAuthDBSchema => {
 	const pluginSchema = (options.plugins ?? []).reduce(
 		(acc, plugin) => {
 			const schema = plugin.schema;
@@ -44,7 +24,7 @@ export const getAuthTables = (
 		},
 		{} as Record<
 			string,
-			{ fields: Record<string, FieldAttribute>; modelName: string }
+			{ fields: Record<string, DBFieldAttribute>; modelName: string }
 		>,
 	);
 
@@ -68,7 +48,7 @@ export const getAuthTables = (
 				},
 			},
 		},
-	} satisfies BetterAuthDbSchema;
+	} satisfies BetterAuthDBSchema;
 
 	const { user, session, account, ...pluginTables } = pluginSchema;
 
@@ -124,7 +104,7 @@ export const getAuthTables = (
 			},
 			order: 2,
 		},
-	} satisfies BetterAuthDbSchema;
+	} satisfies BetterAuthDBSchema;
 
 	return {
 		user: {
@@ -290,5 +270,5 @@ export const getAuthTables = (
 		},
 		...pluginTables,
 		...(shouldAddRateLimitTable ? rateLimitTable : {}),
-	} satisfies BetterAuthDbSchema;
+	} satisfies BetterAuthDBSchema;
 };
diff --git a/packages/better-auth/src/db/index.ts b/packages/better-auth/src/db/index.ts
index 427d8b80..34f60aa2 100644
--- a/packages/better-auth/src/db/index.ts
+++ b/packages/better-auth/src/db/index.ts
@@ -1,3 +1,4 @@
+export * from "@better-auth/core/db";
 export * from "./internal-adapter";
 export * from "./field";
 export * from "./get-tables";
diff --git a/packages/better-auth/src/db/schema.ts b/packages/better-auth/src/db/schema.ts
index 37e7c8d7..5271c2f9 100644
--- a/packages/better-auth/src/db/schema.ts
+++ b/packages/better-auth/src/db/schema.ts
@@ -1,9 +1,9 @@
 import * as z from "zod";
-import type { FieldAttribute } from ".";
 import type { AuthPluginSchema } from "../types/plugins";
 import type { BetterAuthOptions } from "../types/options";
 import { APIError } from "better-call";
 import type { Account, Session, User } from "../types";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 
 export const coreSchema = z.object({
 	id: z.string(),
@@ -60,7 +60,7 @@ export const verificationSchema = coreSchema.extend({
 export function parseOutputData<T extends Record<string, any>>(
 	data: T,
 	schema: {
-		fields: Record<string, FieldAttribute>;
+		fields: Record<string, DBFieldAttribute>;
 	},
 ) {
 	const fields = schema.fields;
@@ -80,7 +80,7 @@ export function parseOutputData<T extends Record<string, any>>(
 }
 
 export function getAllFields(options: BetterAuthOptions, table: string) {
-	let schema: Record<string, FieldAttribute> = {
+	let schema: Record<string, DBFieldAttribute> = {
 		...(table === "user" ? options.user?.additionalFields : {}),
 		...(table === "session" ? options.session?.additionalFields : {}),
 	};
@@ -119,7 +119,7 @@ export function parseSessionOutput(
 export function parseInputData<T extends Record<string, any>>(
 	data: T,
 	schema: {
-		fields: Record<string, FieldAttribute>;
+		fields: Record<string, DBFieldAttribute>;
 		action?: "create" | "update";
 	},
 ) {
diff --git a/packages/better-auth/src/db/to-zod.ts b/packages/better-auth/src/db/to-zod.ts
index 6ba187d5..9accf397 100644
--- a/packages/better-auth/src/db/to-zod.ts
+++ b/packages/better-auth/src/db/to-zod.ts
@@ -1,9 +1,9 @@
 import * as z from "zod";
 import type { ZodType } from "zod";
-import type { FieldAttribute } from ".";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 
 export function toZodSchema<
-	Fields extends Record<string, FieldAttribute | never>,
+	Fields extends Record<string, DBFieldAttribute | never>,
 	IsClientSide extends boolean,
 >({
 	fields,
@@ -56,14 +56,14 @@ export function toZodSchema<
 }
 
 export type FieldAttributeToSchema<
-	Field extends FieldAttribute | Record<string, never>,
+	Field extends DBFieldAttribute | Record<string, never>,
 	// if it's client side, then field attributes of `input` that are false should be removed
 	isClientSide extends boolean = false,
 > = Field extends { type: any }
 	? GetInput<isClientSide, Field, GetRequired<Field, GetType<Field>>>
 	: Record<string, never>;
 
-type GetType<F extends FieldAttribute> = F extends {
+type GetType<F extends DBFieldAttribute> = F extends {
 	type: "string";
 }
 	? z.ZodString
@@ -76,7 +76,7 @@ type GetType<F extends FieldAttribute> = F extends {
 				: z.ZodAny;
 
 type GetRequired<
-	F extends FieldAttribute,
+	F extends DBFieldAttribute,
 	Schema extends z.core.SomeType,
 > = F extends {
 	required: true;
@@ -86,7 +86,7 @@ type GetRequired<
 
 type GetInput<
 	isClientSide extends boolean,
-	Field extends FieldAttribute,
+	Field extends DBFieldAttribute,
 	Schema extends z.core.SomeType,
 > = Field extends {
 	input: false;
diff --git a/packages/better-auth/src/db/utils.ts b/packages/better-auth/src/db/utils.ts
index 2d0d11ba..065c3e9d 100644
--- a/packages/better-auth/src/db/utils.ts
+++ b/packages/better-auth/src/db/utils.ts
@@ -1,10 +1,11 @@
-import { getAuthTables, type FieldAttribute } from ".";
+import { getAuthTables } from ".";
 import { BetterAuthError } from "../error";
 import type { Adapter, BetterAuthOptions } from "../types";
 import { createKyselyAdapter } from "../adapters/kysely-adapter/dialect";
 import { kyselyAdapter } from "../adapters/kysely-adapter";
 import { memoryAdapter, type MemoryDB } from "../adapters/memory-adapter";
 import { logger } from "../utils";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 
 export async function getAdapter(options: BetterAuthOptions): Promise<Adapter> {
 	if (!options.database) {
@@ -37,7 +38,7 @@ export async function getAdapter(options: BetterAuthOptions): Promise<Adapter> {
 }
 
 export function convertToDB<T extends Record<string, any>>(
-	fields: Record<string, FieldAttribute>,
+	fields: Record<string, DBFieldAttribute>,
 	values: T,
 ) {
 	let result: Record<string, any> = values.id
@@ -57,7 +58,7 @@ export function convertToDB<T extends Record<string, any>>(
 }
 
 export function convertFromDB<T extends Record<string, any>>(
-	fields: Record<string, FieldAttribute>,
+	fields: Record<string, DBFieldAttribute>,
 	values: T | null,
 ) {
 	if (!values) {
diff --git a/packages/better-auth/src/init.ts b/packages/better-auth/src/init.ts
index 3e524784..f45f052a 100644
--- a/packages/better-auth/src/init.ts
+++ b/packages/better-auth/src/init.ts
@@ -1,11 +1,6 @@
 import { defu } from "defu";
 import { hashPassword, verifyPassword } from "./crypto/password";
-import {
-	type BetterAuthDbSchema,
-	createInternalAdapter,
-	getAuthTables,
-	getMigrations,
-} from "./db";
+import { createInternalAdapter, getAuthTables, getMigrations } from "./db";
 import type { Entries } from "type-fest";
 import { getAdapter } from "./db/utils";
 import type {
@@ -37,6 +32,7 @@ import type { TelemetryEvent } from "./telemetry/types";
 import { getKyselyDatabaseType } from "./adapters/kysely-adapter";
 import { checkEndpointConflicts } from "./api";
 import { isPromise } from "./utils/is-promise";
+import type { BetterAuthDBSchema } from "@better-auth/core/db";
 
 export const init = async (options: BetterAuthOptions) => {
 	const adapter = await getAdapter(options);
@@ -245,7 +241,7 @@ export type AuthContext = {
 		};
 		checkPassword: typeof checkPassword;
 	};
-	tables: BetterAuthDbSchema;
+	tables: BetterAuthDBSchema;
 	runMigrations: () => Promise<void>;
 	publishTelemetry: (event: TelemetryEvent) => Promise<void>;
 };
diff --git a/packages/better-auth/src/plugins/additional-fields/client.ts b/packages/better-auth/src/plugins/additional-fields/client.ts
index f3ac889a..faeb4851 100644
--- a/packages/better-auth/src/plugins/additional-fields/client.ts
+++ b/packages/better-auth/src/plugins/additional-fields/client.ts
@@ -1,4 +1,4 @@
-import type { FieldAttribute } from "../../db";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 import type { BetterAuthClientPlugin, BetterAuthOptions } from "../../types";
 import type { BetterAuthPlugin } from "../../types";
 
@@ -6,10 +6,10 @@ export const inferAdditionalFields = <
 	T,
 	S extends {
 		user?: {
-			[key: string]: FieldAttribute;
+			[key: string]: DBFieldAttribute;
 		};
 		session?: {
-			[key: string]: FieldAttribute;
+			[key: string]: DBFieldAttribute;
 		};
 	} = {},
 >(
@@ -26,10 +26,10 @@ export const inferAdditionalFields = <
 	type Plugin = Opts extends never
 		? S extends {
 				user?: {
-					[key: string]: FieldAttribute;
+					[key: string]: DBFieldAttribute;
 				};
 				session?: {
-					[key: string]: FieldAttribute;
+					[key: string]: DBFieldAttribute;
 				};
 			}
 			? {
diff --git a/packages/better-auth/src/plugins/open-api/generator.ts b/packages/better-auth/src/plugins/open-api/generator.ts
index 7c2f56f4..f887c1a9 100644
--- a/packages/better-auth/src/plugins/open-api/generator.ts
+++ b/packages/better-auth/src/plugins/open-api/generator.ts
@@ -6,13 +6,13 @@ import type {
 } from "better-call";
 import * as z from "zod";
 import { getEndpoints } from "../../api";
-import {
-	type FieldAttributeConfig,
-	type FieldType,
-	getAuthTables,
-} from "../../db";
+import { getAuthTables } from "../../db";
 import type { AuthContext, BetterAuthOptions } from "../../types";
-import type { FieldAttribute } from "../../db";
+import type {
+	DBFieldAttribute,
+	DBFieldAttributeConfig,
+	DBFieldType,
+} from "@better-auth/core/db";
 
 export interface Path {
 	get?: {
@@ -81,8 +81,8 @@ function getTypeFromZodType(zodType: z.ZodType<any>) {
 }
 
 type FieldSchema = {
-	type: FieldType;
-	default?: FieldAttributeConfig["defaultValue"] | "Generated at runtime";
+	type: DBFieldType;
+	default?: DBFieldAttributeConfig["defaultValue"] | "Generated at runtime";
 	readOnly?: boolean;
 };
 
@@ -92,7 +92,7 @@ type OpenAPIModelSchema = {
 	required?: string[];
 };
 
-function getFieldSchema(field: FieldAttribute) {
+function getFieldSchema(field: DBFieldAttribute) {
 	const schema: FieldSchema = {
 		type: field.type === "date" ? "string" : field.type,
 	};
diff --git a/packages/better-auth/src/plugins/organization/client.ts b/packages/better-auth/src/plugins/organization/client.ts
index eaece585..ed10aefe 100644
--- a/packages/better-auth/src/plugins/organization/client.ts
+++ b/packages/better-auth/src/plugins/organization/client.ts
@@ -19,7 +19,7 @@ import {
 	ownerAc,
 	defaultRoles,
 } from "./access";
-import type { FieldAttribute } from "../../db";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 import type { BetterAuthOptions, BetterAuthPlugin } from "../../types";
 import type { OrganizationOptions } from "./types";
 import type { HasPermissionBaseInput } from "./permission";
@@ -47,27 +47,27 @@ interface OrganizationClientOptions {
 	schema?: {
 		organization?: {
 			additionalFields?: {
-				[key: string]: FieldAttribute;
+				[key: string]: DBFieldAttribute;
 			};
 		};
 		member?: {
 			additionalFields?: {
-				[key: string]: FieldAttribute;
+				[key: string]: DBFieldAttribute;
 			};
 		};
 		invitation?: {
 			additionalFields?: {
-				[key: string]: FieldAttribute;
+				[key: string]: DBFieldAttribute;
 			};
 		};
 		team?: {
 			additionalFields?: {
-				[key: string]: FieldAttribute;
+				[key: string]: DBFieldAttribute;
 			};
 		};
 		organizationRole?: {
 			additionalFields?: {
-				[key: string]: FieldAttribute;
+				[key: string]: DBFieldAttribute;
 			};
 		};
 	};
diff --git a/packages/better-auth/src/plugins/organization/routes/crud-access-control.test.ts b/packages/better-auth/src/plugins/organization/routes/crud-access-control.test.ts
index 13e3e6f8..05691d6c 100644
--- a/packages/better-auth/src/plugins/organization/routes/crud-access-control.test.ts
+++ b/packages/better-auth/src/plugins/organization/routes/crud-access-control.test.ts
@@ -6,7 +6,7 @@ import { inferOrgAdditionalFields, organizationClient } from "../client";
 import { createAccessControl } from "../../access";
 import { adminAc, defaultStatements, memberAc, ownerAc } from "../access";
 import { parseSetCookieHeader } from "../../../cookies";
-import type { FieldAttribute } from "../../../db";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 import { ORGANIZATION_ERROR_CODES } from "../error-codes";
 
 describe("dynamic access control", async (it) => {
@@ -43,7 +43,7 @@ describe("dynamic access control", async (it) => {
 			input: false,
 			required: true,
 		},
-	} satisfies Record<string, FieldAttribute>;
+	} satisfies Record<string, DBFieldAttribute>;
 
 	const { auth, customFetchImpl, sessionSetter, signInWithTestUser } =
 		await getTestInstance({
diff --git a/packages/better-auth/src/plugins/organization/types.ts b/packages/better-auth/src/plugins/organization/types.ts
index f053f96a..70f423dd 100644
--- a/packages/better-auth/src/plugins/organization/types.ts
+++ b/packages/better-auth/src/plugins/organization/types.ts
@@ -1,4 +1,4 @@
-import type { FieldAttribute } from "../../db";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 import type { User, Session, AuthContext } from "../../types";
 import type { AccessControl, Role } from "../access";
 import type {
@@ -257,7 +257,7 @@ export interface OrganizationOptions {
 				[key in keyof Omit<Organization, "id">]?: string;
 			};
 			additionalFields?: {
-				[key in string]: FieldAttribute;
+				[key in string]: DBFieldAttribute;
 			};
 		};
 		member?: {
@@ -266,7 +266,7 @@ export interface OrganizationOptions {
 				[key in keyof Omit<Member, "id">]?: string;
 			};
 			additionalFields?: {
-				[key in string]: FieldAttribute;
+				[key in string]: DBFieldAttribute;
 			};
 		};
 		invitation?: {
@@ -275,7 +275,7 @@ export interface OrganizationOptions {
 				[key in keyof Omit<Invitation, "id">]?: string;
 			};
 			additionalFields?: {
-				[key in string]: FieldAttribute;
+				[key in string]: DBFieldAttribute;
 			};
 		};
 		team?: {
@@ -284,7 +284,7 @@ export interface OrganizationOptions {
 				[key in keyof Omit<Team, "id">]?: string;
 			};
 			additionalFields?: {
-				[key in string]: FieldAttribute;
+				[key in string]: DBFieldAttribute;
 			};
 		};
 		teamMember?: {
@@ -299,7 +299,7 @@ export interface OrganizationOptions {
 				[key in keyof Omit<OrganizationRole, "id">]?: string;
 			};
 			additionalFields?: {
-				[key in string]: FieldAttribute;
+				[key in string]: DBFieldAttribute;
 			};
 		};
 	};
diff --git a/packages/better-auth/src/types/options.ts b/packages/better-auth/src/types/options.ts
index 83db00a5..df79ab06 100644
--- a/packages/better-auth/src/types/options.ts
+++ b/packages/better-auth/src/types/options.ts
@@ -10,7 +10,7 @@ import type { BetterAuthPlugin } from "./plugins";
 import type { SocialProviderList, SocialProviders } from "../social-providers";
 import type { AdapterInstance, SecondaryStorage } from "./adapter";
 import type { KyselyDatabaseType } from "../adapters/kysely-adapter/types";
-import type { FieldAttribute } from "../db";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 import type { Models, RateLimit } from "./models";
 import type { AuthContext } from ".";
 import type { CookieOptions } from "better-call";
@@ -457,7 +457,7 @@ export type BetterAuthOptions = {
 		 * Additional fields for the session
 		 */
 		additionalFields?: {
-			[key: string]: FieldAttribute;
+			[key: string]: DBFieldAttribute;
 		};
 		/**
 		 * Changing email configuration
@@ -567,7 +567,7 @@ export type BetterAuthOptions = {
 		 * Additional fields for the session
 		 */
 		additionalFields?: {
-			[key: string]: FieldAttribute;
+			[key: string]: DBFieldAttribute;
 		};
 		/**
 		 * By default if secondary storage is provided
diff --git a/packages/better-auth/src/types/plugins.ts b/packages/better-auth/src/types/plugins.ts
index 54eab952..64b59ebd 100644
--- a/packages/better-auth/src/types/plugins.ts
+++ b/packages/better-auth/src/types/plugins.ts
@@ -1,6 +1,5 @@
 import type { Migration } from "kysely";
 import { type AuthMiddleware } from "../api/call";
-import type { FieldAttribute } from "../db/field";
 import type { HookEndpointContext } from ".";
 import type {
 	Awaitable,
@@ -11,11 +10,12 @@ import type {
 
 import type { AuthContext, BetterAuthOptions } from ".";
 import type { Endpoint, Middleware } from "better-call";
+import type { DBFieldAttribute } from "@better-auth/core/db";
 
 export type AuthPluginSchema = {
 	[table in string]: {
 		fields: {
-			[field in string]: FieldAttribute;
+			[field in string]: DBFieldAttribute;
 		};
 		disableMigration?: boolean;
 		modelName?: string;
diff --git a/packages/better-auth/tsconfig.json b/packages/better-auth/tsconfig.json
index a033d8b7..91133754 100644
--- a/packages/better-auth/tsconfig.json
+++ b/packages/better-auth/tsconfig.json
@@ -6,5 +6,6 @@
     "lib": ["esnext", "dom", "dom.iterable"],
     "types": ["node", "bun"]
   },
-  "include": ["src"]
+  "include": ["src"],
+  "references": [{ "path": "../core" }]
 }
diff --git a/packages/cli/src/generators/drizzle.ts b/packages/cli/src/generators/drizzle.ts
index 9d0c4f3c..428a1028 100644
--- a/packages/cli/src/generators/drizzle.ts
+++ b/packages/cli/src/generators/drizzle.ts
@@ -1,7 +1,7 @@
 import {
 	getAuthTables,
-	type BetterAuthDbSchema,
-	type FieldAttribute,
+	type BetterAuthDBSchema,
+	type DBFieldAttribute,
 } from "better-auth/db";
 import type { BetterAuthOptions } from "better-auth/types";
 import { existsSync } from "fs";
@@ -43,7 +43,7 @@ export const generateDrizzleSchema: SchemaGenerator = async ({
 		const modelName = getModelName(table.modelName, adapter.options);
 		const fields = table.fields;
 
-		function getType(name: string, field: FieldAttribute) {
+		function getType(name: string, field: DBFieldAttribute) {
 			// Not possible to reach, it's here to make typescript happy
 			if (!databaseType) {
 				throw new Error(
@@ -224,7 +224,7 @@ function generateImport({
 	options,
 }: {
 	databaseType: "sqlite" | "mysql" | "pg";
-	tables: BetterAuthDbSchema;
+	tables: BetterAuthDBSchema;
 	options: BetterAuthOptions;
 }) {
 	const rootImports: string[] = [];
diff --git a/packages/core/build.config.ts b/packages/core/build.config.ts
index e08f4fda..8856678f 100644
--- a/packages/core/build.config.ts
+++ b/packages/core/build.config.ts
@@ -8,5 +8,5 @@ export default defineBuildConfig({
 	outDir: "dist",
 	clean: true,
 	failOnWarn: false,
-	entries: ["./src/index.ts"],
+	entries: ["./src/index.ts", "./src/db/index.ts"],
 });
diff --git a/packages/core/package.json b/packages/core/package.json
index 103b1b32..131734d6 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -12,15 +12,28 @@
         "default": "./dist/index.mjs"
       },
       "require": {
-        "types": "./dist/index.d.cjs",
+        "types": "./dist/index.d.cts",
         "default": "./dist/index.cjs"
       }
+    },
+    "./db": {
+      "import": {
+        "types": "./dist/db/index.d.ts",
+        "default": "./dist/db/index.mjs"
+      },
+      "require": {
+        "types": "./dist/db/index.d.cts",
+        "default": "./dist/db/index.cjs"
+      }
     }
   },
   "typesVersions": {
     "*": {
       "index": [
         "dist/index.d.ts"
+      ],
+      "db": [
+        "dist/db.d.ts"
       ]
     }
   },
@@ -31,5 +44,9 @@
   },
   "devDependencies": {
     "unbuild": "catalog:"
+  },
+  "dependencies": {
+    "better-call": "catalog:",
+    "zod": "^4.1.5"
   }
 }
diff --git a/packages/core/src/db/index.ts b/packages/core/src/db/index.ts
new file mode 100644
index 00000000..a6b5dcec
--- /dev/null
+++ b/packages/core/src/db/index.ts
@@ -0,0 +1,36 @@
+import type {
+	DBFieldAttribute,
+	DBFieldAttributeConfig,
+	DBFieldType,
+	DBPrimitive,
+	BetterAuthDBSchema,
+} from "./type";
+
+export type {
+	DBFieldAttribute,
+	DBFieldAttributeConfig,
+	DBFieldType,
+	DBPrimitive,
+	BetterAuthDBSchema,
+};
+
+/**
+ * @deprecated Backport for 1.3.x, we will remove this in 1.4.x
+ */
+export type FieldAttribute = DBFieldAttribute;
+/**
+ * @deprecated Backport for 1.3.x, we will remove this in 1.4.x
+ */
+export type FieldAttributeConfig = DBFieldAttributeConfig;
+/**
+ * @deprecated Backport for 1.3.x, we will remove this in 1.4.x
+ */
+export type FieldType = DBFieldType;
+/**
+ * @deprecated Backport for 1.3.x, we will remove this in 1.4.x
+ */
+export type Primitive = DBPrimitive;
+/**
+ * @deprecated Backport for 1.3.x, we will remove this in 1.4.x
+ */
+export type BetterAuthDbSchema = BetterAuthDBSchema;
diff --git a/packages/core/src/db/type.ts b/packages/core/src/db/type.ts
new file mode 100644
index 00000000..a216fa4e
--- /dev/null
+++ b/packages/core/src/db/type.ts
@@ -0,0 +1,133 @@
+import type { ZodType } from "zod";
+import type { LiteralString } from "../types";
+
+export type DBFieldType =
+	| "string"
+	| "number"
+	| "boolean"
+	| "date"
+	| "json"
+	| `${"string" | "number"}[]`
+	| Array<LiteralString>;
+
+export type DBPrimitive =
+	| string
+	| number
+	| boolean
+	| Date
+	| null
+	| undefined
+	| string[]
+	| number[];
+
+export type DBFieldAttributeConfig = {
+	/**
+	 * If the field should be required on a new record.
+	 * @default true
+	 */
+	required?: boolean;
+	/**
+	 * If the value should be returned on a response body.
+	 * @default true
+	 */
+	returned?: boolean;
+	/**
+	 * If a value should be provided when creating a new record.
+	 * @default true
+	 */
+	input?: boolean;
+	/**
+	 * Default value for the field
+	 *
+	 * Note: This will not create a default value on the database level. It will only
+	 * be used when creating a new record.
+	 */
+	defaultValue?: DBPrimitive | (() => DBPrimitive);
+	/**
+	 * Update value for the field
+	 *
+	 * Note: This will create an onUpdate trigger on the database level for supported adapters.
+	 * It will be called when updating a record.
+	 */
+	onUpdate?: () => DBPrimitive;
+	/**
+	 * transform the value before storing it.
+	 */
+	transform?: {
+		input?: (value: DBPrimitive) => DBPrimitive | Promise<DBPrimitive>;
+		output?: (value: DBPrimitive) => DBPrimitive | Promise<DBPrimitive>;
+	};
+	/**
+	 * Reference to another model.
+	 */
+	references?: {
+		/**
+		 * The model to reference.
+		 */
+		model: string;
+		/**
+		 * The field on the referenced model.
+		 */
+		field: string;
+		/**
+		 * The action to perform when the reference is deleted.
+		 * @default "cascade"
+		 */
+		onDelete?:
+			| "no action"
+			| "restrict"
+			| "cascade"
+			| "set null"
+			| "set default";
+	};
+	unique?: boolean;
+	/**
+	 * If the field should be a bigint on the database instead of integer.
+	 */
+	bigint?: boolean;
+	/**
+	 * A zod schema to validate the value.
+	 */
+	validator?: {
+		input?: ZodType;
+		output?: ZodType;
+	};
+	/**
+	 * The name of the field on the database.
+	 */
+	fieldName?: string;
+	/**
+	 * If the field should be sortable.
+	 *
+	 * applicable only for `text` type.
+	 * It's useful to mark fields varchar instead of text.
+	 */
+	sortable?: boolean;
+};
+
+export type DBFieldAttribute<T extends DBFieldType = DBFieldType> = {
+	type: T;
+} & DBFieldAttributeConfig;
+
+export type BetterAuthDBSchema = Record<
+	string,
+	{
+		/**
+		 * The name of the table in the database
+		 */
+		modelName: string;
+		/**
+		 * The fields of the table
+		 */
+		fields: Record<string, DBFieldAttribute>;
+		/**
+		 * Whether to disable migrations for this table
+		 * @default false
+		 */
+		disableMigrations?: boolean;
+		/**
+		 * The order of the table
+		 */
+		order?: number;
+	}
+>;
diff --git a/packages/core/src/types/helper.ts b/packages/core/src/types/helper.ts
new file mode 100644
index 00000000..106af4a2
--- /dev/null
+++ b/packages/core/src/types/helper.ts
@@ -0,0 +1 @@
+export type LiteralString = "" | (string & Record<never, never>);
diff --git a/packages/core/src/types/index.ts b/packages/core/src/types/index.ts
new file mode 100644
index 00000000..b9755e78
--- /dev/null
+++ b/packages/core/src/types/index.ts
@@ -0,0 +1 @@
+export * from "./helper";
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f7fd615b..975732e3 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -906,6 +906,13 @@ importers:
         version: 3.6.1(sass@1.90.0)(typescript@5.9.2)(vue@3.5.19(typescript@5.9.2))
 
   packages/core:
+    dependencies:
+      better-call:
+        specifier: 'catalog:'
+        version: 1.0.19
+      zod:
+        specifier: ^4.1.5
+        version: 4.1.5
     devDependencies:
       unbuild:
         specifier: 'catalog:'
@@ -16013,7 +16020,9 @@ snapshots:
       metro-runtime: 0.83.1
     transitivePeerDependencies:
       - '@babel/core'
+      - bufferutil
       - supports-color
+      - utf-8-validate
     optional: true
 
   '@react-native/normalize-colors@0.79.6': {}