diff --git a/packages/types/package.json b/packages/types/package.json
index aed68d1..f18b5e9 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -64,7 +64,7 @@
     }
   },
   "scripts": {
-    "build": "unbuild",
+    "prepack": "unbuild",
     "type:check": "tsc -b"
   }
 }
diff --git a/packages/types/src/v3.0.test-d.ts b/packages/types/src/v3.0.test-d.ts
index 8230ffe..ccd02f1 100644
--- a/packages/types/src/v3.0.test-d.ts
+++ b/packages/types/src/v3.0.test-d.ts
@@ -1,4 +1,5 @@
 import type {
+  HeaderObject,
   OpenAPIObject,
   ReferenceObject,
   ResponsesObject,
@@ -427,3 +428,63 @@ export const typedSchemaMismatch = {
   default: 1,
   type: 'string',
 } satisfies SchemaObject<string>
+
+export const noInfoSummary = {
+  info: {
+    // @ts-expect-error: The Info Object's `summary` field was added in OpenAPI 3.1.
+    summary: 'A short summary',
+    title: 'API',
+    version: '1.0.0',
+  },
+  openapi: '3.0.4',
+  paths: {},
+} satisfies OpenAPIObject
+
+export const noLicenseIdentifier = {
+  info: {
+    license: {
+      // @ts-expect-error: The License Object's `identifier` field was added in OpenAPI 3.1.
+      identifier: 'MIT',
+      name: 'MIT',
+    },
+    title: 'API',
+    version: '1.0.0',
+  },
+  openapi: '3.0.4',
+  paths: {},
+} satisfies OpenAPIObject
+
+export const noJsonSchemaDialect = {
+  info: { title: 'API', version: '1.0.0' },
+  // @ts-expect-error: The `jsonSchemaDialect` field was added in OpenAPI 3.1.
+  jsonSchemaDialect: 'https://spec.openapis.org/oas/3.1/dialect/base',
+  openapi: '3.0.4',
+  paths: {},
+} satisfies OpenAPIObject
+
+export const noPathItemsComponent = {
+  components: {
+    // @ts-expect-error: The Components Object's `pathItems` field was added in OpenAPI 3.1.
+    pathItems: {},
+  },
+  info: { title: 'API', version: '1.0.0' },
+  openapi: '3.0.4',
+  paths: {},
+} satisfies OpenAPIObject
+
+export const noNullType = {
+  // @ts-expect-error: `"null"` is not a valid `type` in OpenAPI 3.0; use `nullable` instead.
+  type: 'null',
+} satisfies SchemaObject
+
+export const noConstKeyword = {
+  // @ts-expect-error: The JSON Schema `const` keyword is not part of the OpenAPI 3.0 Schema Object.
+  const: 'fixed',
+  type: 'string',
+} satisfies SchemaObject
+
+export const headerStyleMustBeSimple = {
+  schema: { type: 'string' },
+  // @ts-expect-error: Header Objects only allow the `simple` style.
+  style: 'form',
+} satisfies HeaderObject
diff --git a/packages/types/src/v3.1.test-d.ts b/packages/types/src/v3.1.test-d.ts
index 412777c..eca39d6 100644
--- a/packages/types/src/v3.1.test-d.ts
+++ b/packages/types/src/v3.1.test-d.ts
@@ -1,4 +1,12 @@
-import type { OpenAPIObject, PathItemObject, SchemaObject } from './v3.1'
+import type {
+  ExampleObject,
+  MediaTypeObject,
+  OpenAPIObject,
+  ParameterObject,
+  PathItemObject,
+  ResponseObject,
+  SchemaObject,
+} from './v3.1'
 
 export const webhooksOnly = {
   components: {
@@ -172,3 +180,134 @@ export const typedSchemaMismatch = {
   examples: [1],
   type: 'string',
 } satisfies SchemaObject<string>
+
+export const noResponseSummary = {
+  description: 'OK',
+  // @ts-expect-error: The Response Object's `summary` field was added in OpenAPI 3.2.
+  summary: 'Success',
+} satisfies ResponseObject
+
+export const noQuerystringLocation = {
+  content: {
+    'application/x-www-form-urlencoded': { schema: { type: 'object' } },
+  },
+  // @ts-expect-error: The `querystring` parameter location was added in OpenAPI 3.2.
+  in: 'querystring',
+  name: 'filter',
+} satisfies ParameterObject
+
+export const noCookieStyle = {
+  in: 'cookie',
+  name: 'session',
+  schema: { type: 'string' },
+  // @ts-expect-error: The `cookie` parameter style was added in OpenAPI 3.2.
+  style: 'cookie',
+} satisfies ParameterObject
+
+export const noSelfUri = {
+  // @ts-expect-error: The `$self` field was added in OpenAPI 3.2.
+  $self: 'https://example.com/openapi',
+  info: { title: 'API', version: '1.0.0' },
+  openapi: '3.1.2',
+  paths: {},
+} satisfies OpenAPIObject
+
+export const noMediaTypesComponent = {
+  components: {
+    // @ts-expect-error: The Components Object's `mediaTypes` field was added in OpenAPI 3.2.
+    mediaTypes: {},
+  },
+  info: { title: 'API', version: '1.0.0' },
+  openapi: '3.1.2',
+} satisfies OpenAPIObject
+
+export const noServerName = {
+  info: { title: 'API', version: '1.0.0' },
+  openapi: '3.1.2',
+  paths: {},
+  servers: [
+    {
+      // @ts-expect-error: The Server Object's `name` field was added in OpenAPI 3.2.
+      name: 'production',
+      url: 'https://api.example.com',
+    },
+  ],
+} satisfies OpenAPIObject
+
+export const noTagHierarchy = {
+  info: { title: 'API', version: '1.0.0' },
+  openapi: '3.1.2',
+  paths: {},
+  tags: [
+    {
+      // @ts-expect-error: The Tag Object's `kind` field was added in OpenAPI 3.2.
+      kind: 'nav',
+      name: 'animals',
+    },
+    {
+      name: 'pets',
+      // @ts-expect-error: The Tag Object's `parent` field was added in OpenAPI 3.2.
+      parent: 'animals',
+    },
+  ],
+} satisfies OpenAPIObject
+
+export const noItemSchema = {
+  // @ts-expect-error: The Media Type Object's `itemSchema` field was added in OpenAPI 3.2.
+  itemSchema: { type: 'object' },
+} satisfies MediaTypeObject
+
+export const noDataValue = {
+  // @ts-expect-error: The Example Object's `dataValue` field was added in OpenAPI 3.2.
+  dataValue: { id: 1 },
+} satisfies ExampleObject
+
+export const noDefaultMapping = {
+  discriminator: {
+    // @ts-expect-error: The Discriminator Object's `defaultMapping` field was added in OpenAPI 3.2.
+    defaultMapping: 'Cat',
+    propertyName: 'kind',
+  },
+  oneOf: [{ type: 'object' }],
+} satisfies SchemaObject
+
+export const noXmlNodeType = {
+  type: 'string',
+  // @ts-expect-error: The XML Object's `nodeType` field was added in OpenAPI 3.2.
+  xml: { nodeType: 'attribute' },
+} satisfies SchemaObject
+
+export const noDeprecatedSecurityScheme = {
+  components: {
+    securitySchemes: {
+      basic: {
+        // @ts-expect-error: The Security Scheme Object's `deprecated` field was added in OpenAPI 3.2.
+        deprecated: true,
+        scheme: 'basic',
+        type: 'http',
+      },
+    },
+  },
+  info: { title: 'API', version: '1.0.0' },
+  openapi: '3.1.2',
+} satisfies OpenAPIObject
+
+export const noDeviceAuthorizationFlow = {
+  components: {
+    securitySchemes: {
+      oauth: {
+        flows: {
+          // @ts-expect-error: The OAuth Device Authorization flow was added in OpenAPI 3.2.
+          deviceAuthorization: {
+            deviceAuthorizationUrl: 'https://auth.example.com/device',
+            scopes: {},
+            tokenUrl: 'https://auth.example.com/token',
+          },
+        },
+        type: 'oauth2',
+      },
+    },
+  },
+  info: { title: 'API', version: '1.0.0' },
+  openapi: '3.1.2',
+} satisfies OpenAPIObject
diff --git a/packages/types/src/v3.1.ts b/packages/types/src/v3.1.ts
index 7190b68..94c7b6e 100644
--- a/packages/types/src/v3.1.ts
+++ b/packages/types/src/v3.1.ts
@@ -19,7 +19,6 @@ import type {
   ExampleObject,
   ExternalDocumentationObject,
   HttpSecuritySchemeObject,
-  LinkObject,
   OAuth2SecuritySchemeObject,
   OpenIdConnectSecuritySchemeObject,
   ParameterLocation,
@@ -39,7 +38,6 @@ export type {
   ExternalDocumentationObject,
   HttpSecuritySchemeObject,
   ImplicitOAuthFlowObject,
-  LinkObject,
   OAuth2SecuritySchemeObject,
   OAuthFlowObject,
   OAuthFlowObjectBase,
@@ -836,6 +834,56 @@ export interface CallbackObject {
   [expression: string]: PathItemObject
 }
 
+/**
+ * The Link Object represents a possible design-time link for a response. The
+ * presence of a link does not guarantee the caller's ability to successfully
+ * invoke it, rather it provides a known relationship and traversal mechanism
+ * between responses and other operations.
+ *
+ * A linked operation MUST be identified using either an `operationRef` or
+ * `operationId` (mutually exclusive).
+ *
+ * @see {@link https://spec.openapis.org/oas/v3.1.2.html#link-object}
+ */
+export interface LinkObject extends SpecificationExtensions {
+  /**
+   * A URI reference to an OAS operation. This field is mutually exclusive of
+   * the `operationId` field, and MUST point to an Operation Object. Relative
+   * `operationRef` values MAY be used to locate an existing Operation Object
+   * in the OpenAPI Description.
+   */
+  operationRef?: string
+  /**
+   * The name of an existing, resolvable OAS operation, as defined with a
+   * unique `operationId`. This field is mutually exclusive of the
+   * `operationRef` field.
+   */
+  operationId?: string
+  /**
+   * A map representing parameters to pass to an operation as specified with
+   * `operationId` or identified via `operationRef`. The key is the parameter
+   * name to be used (optionally qualified with the parameter location, e.g.
+   * `path.id` for an `id` parameter in the path), whereas the value can be a
+   * constant or an expression to be evaluated and passed to the linked
+   * operation.
+   */
+  parameters?: Record<string, unknown>
+  /**
+   * A literal value or runtime expression to use as a request body when
+   * calling the target operation.
+   */
+  requestBody?: unknown
+  /**
+   * A description of the link. CommonMark syntax MAY be used for rich text
+   * representation.
+   */
+  description?: string
+  /**
+   * A server object to be used by the target operation.
+   */
+  server?: ServerObject
+}
+
 /**
  * Describes a single header for HTTP responses and for individual parts in
  * multipart representations.
diff --git a/packages/types/src/v3.2.test-d.ts b/packages/types/src/v3.2.test-d.ts
index 6e2d3cf..b60de10 100644
--- a/packages/types/src/v3.2.test-d.ts
+++ b/packages/types/src/v3.2.test-d.ts
@@ -1,4 +1,11 @@
-import type { MediaTypeObject, OpenAPIObject, SchemaObject } from './v3.2'
+import type {
+  HeaderObject,
+  MediaTypeObject,
+  OpenAPIObject,
+  RequestBodyObject,
+  ResponseObject,
+  SchemaObject,
+} from './v3.2'
 
 export const streamingApi = {
   $self: 'https://example.com/openapi',
@@ -243,3 +250,28 @@ export const typedSchemaMismatch = {
   const: 1,
   type: 'string',
 } satisfies SchemaObject<string>
+
+export const referencedRequestContent = {
+  content: {
+    'text/event-stream': { $ref: '#/components/mediaTypes/EventStream' },
+  },
+} satisfies RequestBodyObject
+
+export const referencedResponseContent = {
+  content: {
+    'text/event-stream': { $ref: '#/components/mediaTypes/EventStream' },
+  },
+  headers: {
+    'X-Trace-Id': {
+      content: {
+        'text/plain': { $ref: '#/components/mediaTypes/TraceId' },
+      },
+    },
+  },
+} satisfies ResponseObject
+
+export const referencedHeaderContent = {
+  content: {
+    'text/plain': { $ref: '#/components/mediaTypes/TraceId' },
+  },
+} satisfies HeaderObject