hey-api · mrlubos · Nov 4, 2025
diff --git a/dev/openapi-ts.config.ts b/dev/openapi-ts.config.ts
@@ -272,11 +272,13 @@ export default defineConfig(() => {
           // signature: 'object',
           // transformer: '@hey-api/transformers',
           // transformer: true,
-          // validator: true,
-          // validator: {
-          //   request: 'zod',
-          //   response: 'zod',
+          // validator(operation) {
+          //   return 'zod';
           // },
+          validator: {
+            request: 'valibot',
+            response: 'zod',
+          },
           '~hooks': {
             symbols: {
               // getFilePath: (symbol) => {
@@ -339,7 +341,7 @@ export default defineConfig(() => {
           },
         },
         {
-          name: 'arktype',
+          // name: 'arktype',
           // types: {
           //   infer: true,
           // },

diff --git a/packages/openapi-ts/src/plugins/@hey-api/sdk/config.ts b/packages/openapi-ts/src/plugins/@hey-api/sdk/config.ts
@@ -1,4 +1,5 @@
 import { definePluginConfig } from '~/plugins/shared/utils/config';
+import type { PluginValidatorNames } from '~/plugins/types';
 
 import { Api } from './api';
 import { handler } from './plugin';
@@ -47,32 +48,40 @@ export const defaultConfig: HeyApiSdkPlugin['Config'] = {
       plugin.config.transformer = false;
     }
 
-    if (typeof plugin.config.validator !== 'object') {
-      plugin.config.validator = {
-        request: plugin.config.validator,
-        response: plugin.config.validator,
-      };
-    }
-
-    if (plugin.config.validator.request) {
-      if (typeof plugin.config.validator.request === 'boolean') {
-        plugin.config.validator.request = context.pluginByTag('validator');
+    const { validator } = plugin.config;
+    plugin.config.validator = ((operation) => {
+      if (typeof validator === 'boolean') {
+        const validatorPlugin = validator
+          ? context.pluginByTag('validator')
+          : undefined;
+        const validatorValue = validatorPlugin
+          ? (validatorPlugin as PluginValidatorNames)
+          : false;
+        return {
+          request: validatorValue,
+          response: validatorValue,
+        };
       }
 
-      plugin.dependencies.add(plugin.config.validator.request!);
-    } else {
-      plugin.config.validator.request = false;
-    }
+      if (typeof validator === 'string') {
+        return {
+          request: validator,
+          response: validator,
+        };
+      }
 
-    if (plugin.config.validator.response) {
-      if (typeof plugin.config.validator.response === 'boolean') {
-        plugin.config.validator.response = context.pluginByTag('validator');
+      if (typeof validator === 'function') {
+        const result = validator(operation);
+        if (typeof result === 'object') {
+          // result.request
+        }
       }
 
-      plugin.dependencies.add(plugin.config.validator.response!);
-    } else {
-      plugin.config.validator.response = false;
-    }
+      return {
+        request: false,
+        response: false,
+      };
+    }) satisfies HeyApiSdkPlugin['Types']['resolvedConfig']['validator'];
 
     if (plugin.config.instance) {
       if (typeof plugin.config.instance !== 'string') {
@@ -91,6 +100,7 @@ export const defaultConfig: HeyApiSdkPlugin['Config'] = {
       }
     }
   },
+  tags: ['sdk'],
 };
 
 /**

diff --git a/packages/openapi-ts/src/plugins/@hey-api/sdk/shared/operation.ts b/packages/openapi-ts/src/plugins/@hey-api/sdk/shared/operation.ts
@@ -19,7 +19,7 @@ import type { HeyApiSdkPlugin } from '../types';
 import { operationAuth } from './auth';
 import { nuxtTypeComposable, nuxtTypeDefault } from './constants';
 import { getSignatureParameters } from './signature';
-import { createRequestValidator, createResponseValidator } from './validator';
+import { createValidators } from './validator';
 
 interface ClassNameEntry {
   /**
@@ -502,11 +502,11 @@ export const operationStatements = ({
     });
   }
 
-  const requestValidator = createRequestValidator({ operation, plugin });
-  if (requestValidator) {
+  const validators = createValidators({ operation, plugin });
+  if (validators.request) {
     requestOptions.push({
       key: 'requestValidator',
-      value: requestValidator,
+      value: validators.request,
     });
   }
 
@@ -553,11 +553,10 @@ export const operationStatements = ({
     }
   }
 
-  const responseValidator = createResponseValidator({ operation, plugin });
-  if (responseValidator) {
+  if (validators.response) {
     requestOptions.push({
       key: 'responseValidator',
-      value: responseValidator,
+      value: validators.response,
     });
   }
 

diff --git a/packages/openapi-ts/src/plugins/@hey-api/sdk/shared/validator.ts b/packages/openapi-ts/src/plugins/@hey-api/sdk/shared/validator.ts
@@ -4,39 +4,39 @@ import type { IR } from '~/ir/types';
 
 import type { HeyApiSdkPlugin } from '../types';
 
-interface ValidatorProps {
-  operation: IR.OperationObject;
-  plugin: HeyApiSdkPlugin['Instance'];
-}
-
-export const createRequestValidator = ({
-  operation,
-  plugin,
-}: ValidatorProps): ts.ArrowFunction | undefined => {
-  if (!plugin.config.validator.request) return;
-
-  const validator = plugin.getPluginOrThrow(plugin.config.validator.request);
-  if (!validator.api.createRequestValidator) return;
-
-  return validator.api.createRequestValidator({
-    operation,
-    // @ts-expect-error
-    plugin: validator,
-  });
+type Validators = {
+  request?: ts.ArrowFunction;
+  response?: ts.ArrowFunction;
 };
 
-export const createResponseValidator = ({
+export const createValidators = ({
   operation,
   plugin,
-}: ValidatorProps): ts.ArrowFunction | undefined => {
-  if (!plugin.config.validator.response) return;
-
-  const validator = plugin.getPluginOrThrow(plugin.config.validator.response);
-  if (!validator.api.createResponseValidator) return;
-
-  return validator.api.createResponseValidator({
-    operation,
-    // @ts-expect-error
-    plugin: validator,
-  });
+}: {
+  operation: IR.OperationObject;
+  plugin: HeyApiSdkPlugin['Instance'];
+}): Validators => {
+  const validators: Validators = {};
+  const values = plugin.config.validator(operation);
+  if (values.request) {
+    const validator = plugin.getPluginOrThrow(values.request);
+    if (validator.api.createRequestValidator) {
+      validators.request = validator.api.createRequestValidator({
+        operation,
+        // @ts-expect-error
+        plugin: validator,
+      });
+    }
+  }
+  if (values.response) {
+    const validator = plugin.getPluginOrThrow(values.response);
+    if (validator.api.createResponseValidator) {
+      validators.response = validator.api.createResponseValidator({
+        operation,
+        // @ts-expect-error
+        plugin: validator,
+      });
+    }
+  }
+  return validators;
 };
diff --git a/packages/openapi-ts/src/plugins/@hey-api/sdk/types.d.ts b/packages/openapi-ts/src/plugins/@hey-api/sdk/types.d.ts
@@ -5,6 +5,34 @@ import type { StringName } from '~/types/case';
 
 import type { IApi } from './api';
 
+type ValidatorValue = PluginValidatorNames | boolean;
+type ValidatorResult =
+  | ValidatorValue
+  | {
+      /**
+       * Validate request data against schema before sending.
+       *
+       * Can be a validator plugin name or boolean (true to auto-select, false
+       * to disable).
+       *
+       * @default false
+       */
+      request?:
+        | ValidatorValue
+        | ((operation: IR.OperationObject) => ValidatorValue);
+      /**
+       * Validate response data against schema before returning.
+       *
+       * Can be a validator plugin name or boolean (true to auto-select, false
+       * to disable).
+       *
+       * @default false
+       */
+      response?:
+        | ValidatorValue
+        | ((operation: IR.OperationObject) => ValidatorValue);
+    };
+
 export type UserConfig = Plugin.Name<'@hey-api/sdk'> &
   Plugin.Hooks & {
     /**
@@ -137,50 +165,18 @@ export type UserConfig = Plugin.Name<'@hey-api/sdk'> &
      * @default false
      */
     validator?:
-      | PluginValidatorNames
-      | boolean
-      | {
-          /**
-           * Validate request data against schema before sending.
-           *
-           * Can be a validator plugin name or boolean (true to auto-select, false
-           * to disable).
-           *
-           * @default false
-           */
-          request?: PluginValidatorNames | boolean;
-          /**
-           * Validate response data against schema before returning.
-           *
-           * Can be a validator plugin name or boolean (true to auto-select, false
-           * to disable).
-           *
-           * @default false
-           */
-          response?: PluginValidatorNames | boolean;
-        };
+      | ValidatorResult
+      | ((operation: IR.OperationObject) => ValidatorResult);
 
     // DEPRECATED OPTIONS BELOW
 
-    /**
-     * **This feature works only with the legacy parser**
-     *
-     * Filter endpoints to be included in the generated SDK. The provided
-     * string should be a regular expression where matched results will be
-     * included in the output. The input pattern this string will be tested
-     * against is `{method} {path}`. For example, you can match
-     * `POST /api/v1/foo` with `^POST /api/v1/foo$`.
-     *
-     * @deprecated
-     */
-    // eslint-disable-next-line typescript-sort-keys/interface
-    filter?: string;
     /**
      * Define shape of returned value from service calls
      *
      * @deprecated
      * @default 'body'
      */
+    // eslint-disable-next-line typescript-sort-keys/interface
     response?: 'body' | 'response';
   };
 
@@ -303,7 +299,7 @@ export type Config = Plugin.Name<'@hey-api/sdk'> &
      * to a desired shape. However, validation adds runtime overhead, so it's
      * not recommended to use unless absolutely necessary.
      */
-    validator: {
+    validator: (operation: IR.OperationObject) => {
       /**
        * The validator plugin to use for request validation, or false to disable.
        *
@@ -320,25 +316,13 @@ export type Config = Plugin.Name<'@hey-api/sdk'> &
 
     // DEPRECATED OPTIONS BELOW
 
-    /**
-     * **This feature works only with the legacy parser**
-     *
-     * Filter endpoints to be included in the generated SDK. The provided
-     * string should be a regular expression where matched results will be
-     * included in the output. The input pattern this string will be tested
-     * against is `{method} {path}`. For example, you can match
-     * `POST /api/v1/foo` with `^POST /api/v1/foo$`.
-     *
-     * @deprecated
-     */
-    // eslint-disable-next-line typescript-sort-keys/interface
-    filter?: string;
     /**
      * Define shape of returned value from service calls
      *
      * @deprecated
      * @default 'body'
      */
+    // eslint-disable-next-line typescript-sort-keys/interface
     response: 'body' | 'response';
   };