chore: upgrade Zod to v4 everywhere

Author: crutchcorn

examples/angular/standard-schema/package.json

@@ -23,7 +23,7 @@
     "rxjs": "^7.8.2",
     "tslib": "^2.8.1",
     "valibot": "^1.1.0",
-    "zod": "^3.25.76",
+    "zod": "^4.3.6",
     "zone.js": "0.15.1"
   },
   "devDependencies": {

examples/lit/standard-schema/package.json

@@ -14,7 +14,7 @@
     "effect": "^3.17.14",
     "lit": "^3.3.1",
     "valibot": "^1.1.0",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "vite": "^7.2.2"

examples/react/dynamic/package.json

@@ -20,7 +20,7 @@
     "@types/react-dom": "^19.0.3",
     "@vitejs/plugin-react": "^5.1.1",
     "vite": "^7.2.2",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   },
   "browserslist": {
     "production": [

examples/react/next-server-actions-zod/package.json

@@ -13,7 +13,7 @@
     "next": "16.0.5",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@types/node": "^24.1.0",

examples/react/next-server-actions-zod/src/app/action.ts

@@ -7,8 +7,15 @@ import {
 import { z } from 'zod'
 import { formOpts } from './shared-code'
 
+// Required as `z.coerce.number()` defined the type as `unknown`, so we need to do the coercion and validation manually
+const zodAtLeast12 = z
+  .custom<number>()
+  .refine((value) => Number.isFinite(Number(value)), 'Invalid number')
+  .transform((value) => Number(value))
+  .refine((value) => value >= 12, 'Age must be at least 12')
+
 const schema = z.object({
-  age: z.coerce.number().min(12),
+  age: zodAtLeast12,
   firstName: z.string(),
 })
 

examples/react/standard-schema/package.json

@@ -17,7 +17,7 @@
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "valibot": "^1.1.0",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@types/react": "^19.0.7",

examples/solid/standard-schema/package.json

@@ -16,7 +16,7 @@
     "react-dom": "^19.0.0",
     "solid-js": "^1.9.9",
     "valibot": "^1.1.0",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "typescript": "5.8.2",

examples/svelte/standard-schema/package.json

@@ -13,7 +13,7 @@
     "arktype": "^2.1.22",
     "effect": "^3.17.14",
     "valibot": "^1.1.0",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@sveltejs/vite-plugin-svelte": "^5.1.1",

examples/vue/standard-schema/package.json

@@ -17,7 +17,7 @@
     "react-dom": "^19.0.0",
     "valibot": "^1.1.0",
     "vue": "^3.5.13",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^5.2.4",

packages/form-core/package.json

@@ -58,6 +58,6 @@
   "devDependencies": {
     "arktype": "^2.1.22",
     "valibot": "^1.1.0",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   }
 }