agent_patch

diff --git a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/jsr.json b/app/packages/zod/jsr.json
index 7d10eab..aeb3ec5 100644
--- a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/jsr.json
+++ b/app/packages/zod/jsr.json
@@ -1,6 +1,6 @@
 {
   "name": "@zod/zod",
-  "version": "4.1.5",
+  "version": "4.1.6",
   "exports": {
     "./package.json": "./package.json",
     ".": "./src/index.ts",
diff --git a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/package.json b/app/packages/zod/package.json
index 772f9c9..0560885 100644
--- a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/package.json
+++ b/app/packages/zod/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zod",
-  "version": "4.1.5",
+  "version": "4.1.6",
   "type": "module",
   "license": "MIT",
   "author": "Colin McDonnell <zod@colinhacks.com>",
@@ -126,7 +126,7 @@
   "scripts": {
     "clean": "git clean -xdf . -e node_modules",
     "build": "zshy --project tsconfig.build.json",
-    "postbuild": "pnpm biome check --write .",
+    "postbuild": "tsx ../../scripts/write-stub-package-jsons.ts && pnpm biome check --write .",
     "test:watch": "pnpm vitest",
     "test": "pnpm vitest run",
     "prepublishOnly": "tsx ../../scripts/check-versions.ts"
diff --git a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/src/v4/classic/schemas.ts b/app/packages/zod/src/v4/classic/schemas.ts
index 3e7934b..e4d3932 100644
--- a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/src/v4/classic/schemas.ts
+++ b/app/packages/zod/src/v4/classic/schemas.ts
@@ -89,10 +89,10 @@ export interface ZodType<
   nonoptional(params?: string | core.$ZodNonOptionalParams): ZodNonOptional<this>;
   nullable(): ZodNullable<this>;
   nullish(): ZodOptional<ZodNullable<this>>;
-  default(def: core.output<this>): ZodDefault<this>;
+  default(def: util.NoUndefined<core.output<this>>): ZodDefault<this>;
   default(def: () => util.NoUndefined<core.output<this>>): ZodDefault<this>;
-  prefault(def: () => core.input<this>): ZodPrefault<this>;
-  prefault(def: core.input<this>): ZodPrefault<this>;
+  prefault(def: () => util.NoUndefined<core.input<this>>): ZodPrefault<this>;
+  prefault(def: util.NoUndefined<core.input<this>>): ZodPrefault<this>;
   array(): ZodArray<this>;
   or<T extends core.SomeType>(option: T): ZodUnion<[this, T]>;
   and<T extends core.SomeType>(incoming: T): ZodIntersection<this, T>;
@@ -1788,7 +1788,7 @@ export const ZodPrefault: core.$constructor<ZodPrefault> = /*@__PURE__*/ core.$c
 
 export function prefault<T extends core.SomeType>(
   innerType: T,
-  defaultValue: core.input<T> | (() => core.input<T>)
+  defaultValue: util.NoUndefined<core.input<T>> | (() => util.NoUndefined<core.input<T>>)
 ): ZodPrefault<T> {
   return new ZodPrefault({
     type: "prefault",
@@ -1931,8 +1931,8 @@ export function codec<const A extends core.SomeType, B extends core.SomeType = c
   in_: A,
   out: B,
   params: {
-    decode: (value: core.output<A>, payload: core.ParsePayload<core.output<A>>) => core.input<B>;
-    encode: (value: core.input<B>, payload: core.ParsePayload<core.input<B>>) => core.output<A>;
+    decode: (value: core.output<A>, payload: core.ParsePayload<core.output<A>>) => util.MaybeAsync<core.input<B>>;
+    encode: (value: core.input<B>, payload: core.ParsePayload<core.input<B>>) => util.MaybeAsync<core.output<A>>;
   }
 ): ZodCodec<A, B> {
   return new ZodCodec({
diff --git a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/src/v4/core/schemas.ts b/app/packages/zod/src/v4/core/schemas.ts
index 3cc6ae7..1f052c0 100644
--- a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/src/v4/core/schemas.ts
+++ b/app/packages/zod/src/v4/core/schemas.ts
@@ -3283,7 +3283,7 @@ export interface $ZodPrefaultDef<T extends SomeType = $ZodType> extends $ZodType
   type: "prefault";
   innerType: T;
   /** The default value. May be a getter. */
-  defaultValue: core.input<T>;
+  defaultValue: util.NoUndefined<core.input<T>>;
 }
 
 export interface $ZodPrefaultInternals<T extends SomeType = $ZodType>
@@ -3653,8 +3653,8 @@ function handlePipeResult(left: ParsePayload, next: $ZodType, ctx: ParseContextI
 ////////////////////////////////////////////
 ////////////////////////////////////////////
 export interface $ZodCodecDef<A extends SomeType = $ZodType, B extends SomeType = $ZodType> extends $ZodPipeDef<A, B> {
-  transform: (value: core.output<A>, payload: ParsePayload<core.output<A>>) => core.input<B>;
-  reverseTransform: (value: core.input<B>, payload: ParsePayload<core.input<B>>) => core.output<A>;
+  transform: (value: core.output<A>, payload: ParsePayload<core.output<A>>) => util.MaybeAsync<core.input<B>>;
+  reverseTransform: (value: core.input<B>, payload: ParsePayload<core.input<B>>) => util.MaybeAsync<core.output<A>>;
 }
 
 export interface $ZodCodecInternals<A extends SomeType = $ZodType, B extends SomeType = $ZodType>
diff --git a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/src/v4/mini/schemas.ts b/app/packages/zod/src/v4/mini/schemas.ts
index 1c05c35..7e8b00a 100644
--- a/tmp/agent-patch-flux-pr-5222.1-of-1.2026-02-27__21-30-28__gpt-5-3-codex/app/packages/zod/src/v4/mini/schemas.ts
+++ b/app/packages/zod/src/v4/mini/schemas.ts
@@ -1460,8 +1460,8 @@ export function codec<const A extends SomeType, B extends core.SomeType = core.$
   in_: A,
   out: B,
   params: {
-    decode: (value: core.output<A>, payload: core.ParsePayload<core.output<A>>) => core.input<B>;
-    encode: (value: core.input<B>, payload: core.ParsePayload<core.input<B>>) => core.output<A>;
+    decode: (value: core.output<A>, payload: core.ParsePayload<core.output<A>>) => util.MaybeAsync<core.input<B>>;
+    encode: (value: core.input<B>, payload: core.ParsePayload<core.input<B>>) => util.MaybeAsync<core.output<A>>;
   }
 ): ZodMiniCodec<A, B> {
   return new ZodMiniCodec({
diff --git a/app/scripts/write-stub-package-jsons.ts b/app/scripts/write-stub-package-jsons.ts
new file mode 100644
index 0000000..ed2b941
--- /dev/null
+++ b/app/scripts/write-stub-package-jsons.ts
@@ -0,0 +1,59 @@
+import { readdir, stat, writeFile } from "node:fs/promises";
+import { dirname, join, relative } from "node:path";
+
+const STUB_PACKAGE_JSON_CONTENT = JSON.stringify(
+  {
+    main: "./index.cjs",
+    module: "./index.js",
+    types: "./index.d.cts",
+  },
+  null,
+  2
+);
+
+const IGNORED_DIRS = new Set([".git", "node_modules", "src"]);
+
+export async function findIndexJsFiles(rootDir: string): Promise<string[]> {
+  const entries = await readdir(rootDir, { withFileTypes: true });
+  const files = await Promise.all(
+    entries.map(async (entry) => {
+      const fullPath = join(rootDir, entry.name);
+      if (entry.isDirectory()) {
+        if (IGNORED_DIRS.has(entry.name)) return [];
+        return findIndexJsFiles(fullPath);
+      }
+      if (entry.isFile() && entry.name === "index.js") {
+        return [fullPath];
+      }
+      return [];
+    })
+  );
+  return files.flat();
+}
+
+async function main() {
+  const cwd = process.cwd();
+  const indexFiles = await findIndexJsFiles(cwd);
+  let written = 0;
+
+  for (const indexFile of indexFiles) {
+    const dir = dirname(indexFile);
+    const packageJsonPath = join(dir, "package.json");
+    const packageJsonExists = await stat(packageJsonPath).then(
+      () => true,
+      () => false
+    );
+
+    if (packageJsonExists) {
+      continue;
+    }
+
+    await writeFile(packageJsonPath, `${STUB_PACKAGE_JSON_CONTENT}\n`);
+    written += 1;
+    console.log(`wrote ${relative(cwd, packageJsonPath)}`);
+  }
+
+  console.log(`stub package.json files written: ${written}`);
+}
+
+void main();