Update zod dependency to major v4 instead of using v4 exported by zod v3

Author: fredericbarthelet

examples/simple-server/package.json

@@ -13,7 +13,7 @@
     "@modelcontextprotocol/sdk": "^1.22.0",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
-    "zod": "^3.25.0"
+    "zod": "^4.1.13"
   },
   "devDependencies": {
     "@types/express": "^5.0.0",

package.json

@@ -55,6 +55,6 @@
     "bun": "^1.3.2",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
-    "zod": "^3.25"
+    "zod": "^4.1.13"
   }
 }

src/app-bridge.ts

@@ -1,5 +1,5 @@
 import { Client } from "@modelcontextprotocol/sdk/client/index.js";
-import { ZodLiteral, ZodObject } from "zod/v4";
+import { ZodLiteral, ZodObject } from "zod";
 
 import { Transport } from "@modelcontextprotocol/sdk/shared/transport.js";
 import {

src/types.ts

@@ -12,7 +12,7 @@ import {
   Tool,
   ToolSchema,
 } from "@modelcontextprotocol/sdk/types.js";
-import { z } from "zod/v4";
+import { z } from "zod";
 
 /**
  * Type-level assertion that validates a Zod schema produces the expected interface.