Support 3.x (#510)

Author: samchungy

.changeset/little-areas-bet.md

@@ -0,0 +1,5 @@
+---
+'zod-openapi': minor
+---
+
+Re-introduce support for OpenAPI 3.x

README.md

@@ -3,7 +3,7 @@
   <h1 align="center">zod-openapi</h1>
 </p>
 <p align="center">
-A TypeScript library which uses <a href="https://github.com/colinhacks/zod">Zod</a> schemas to generate OpenAPI v3.1x documentation.
+A TypeScript library which uses <a href="https://github.com/colinhacks/zod">Zod</a> schemas to generate OpenAPI v3.x documentation.
 </p>
 <div align="center">
 <a href="https://www.npmjs.com/package/zod-openapi"><img src="https://img.shields.io/npm/v/zod-openapi"/></a>

package.json

@@ -68,7 +68,7 @@
     "tsdown": "0.14.0",
     "vitest": "3.2.4",
     "yaml": "2.8.1",
-    "zod": "4.0.17"
+    "zod": "4.1.1"
   },
   "peerDependencies": {
     "zod": "^3.25.74 || ^4.0.0"

pnpm-lock.yaml

@@ -1,5 +1,6 @@
 import { type $ZodType, globalRegistry } from 'zod/v4/core';
 
+import type { OpenApiVersion } from '../openapi.js';
 import { isAnyZodType } from '../zod.js';
 
 import { createContent } from './content.js';
@@ -954,6 +955,7 @@ const createIOSchemas = (ctx: {
   registry: ComponentRegistry;
   io: 'input' | 'output';
   opts: CreateDocumentOptions;
+  openapiVersion?: OpenApiVersion;
 }) => {
   const { schemas, components, manual } = createSchemas(
     Object.fromEntries(ctx.registry.components.schemas[ctx.io]),
@@ -999,9 +1001,10 @@ const createManualSchemas = (registry: ComponentRegistry) => {
 export const createComponents = (
   registry: ComponentRegistry,
   opts: CreateDocumentOptions,
+  openapiVersion?: OpenApiVersion,
 ) => {
-  createIOSchemas({ registry, io: 'input', opts });
-  createIOSchemas({ registry, io: 'output', opts });
+  createIOSchemas({ registry, io: 'input', opts, openapiVersion });
+  createIOSchemas({ registry, io: 'output', opts, openapiVersion });
   createManualSchemas(registry);
 
   const components: oas31.ComponentsObject = {};