diff --git a/eslint.config.mjs b/eslint.config.mjs
index 151a3817..1573ebc1 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -24,6 +24,7 @@ export default tseslint.config(
     'examples/realtime-demo/**',
     'examples/nextjs/**',
     'integration-tests//**',
+    'tsc-multi.json',
   ]),
   eslint.configs.recommended,
   tseslint.configs.recommended,
diff --git a/integration-tests/node.test.ts b/integration-tests/node.test.ts
index c8a40c9c..b12cdf62 100644
--- a/integration-tests/node.test.ts
+++ b/integration-tests/node.test.ts
@@ -1,7 +1,15 @@
 import { describe, test, expect, beforeAll } from 'vitest';
 import { execa as execaBase } from 'execa';
 
-const execa = execaBase({ cwd: './integration-tests/node' });
+const execa = execaBase({
+  cwd: './integration-tests/node',
+  env: {
+    ...process.env,
+    NODE_OPTIONS: '',
+    TS_NODE_PROJECT: '',
+    TS_NODE_COMPILER_OPTIONS: '',
+  },
+});
 
 describe('Node.js', () => {
   beforeAll(async () => {
diff --git a/integration-tests/node/package.json b/integration-tests/node/package.json
index 676a1219..d4a455ac 100644
--- a/integration-tests/node/package.json
+++ b/integration-tests/node/package.json
@@ -1,10 +1,12 @@
 {
   "private": true,
+  "type": "commonjs",
   "scripts": {
-    "start:cjs": "node index.cjs",
-    "start:esm": "node index.mjs"
+    "start:cjs": "node --no-experimental-require-module index.cjs",
+    "start:esm": "node --no-experimental-require-module index.mjs"
   },
   "dependencies": {
-    "@openai/agents": "latest"
+    "@openai/agents": "latest",
+    "typescript": "^5.9.2"
   }
 }
diff --git a/packages/agents-core/package.json b/packages/agents-core/package.json
index 6672371e..9d699feb 100644
--- a/packages/agents-core/package.json
+++ b/packages/agents-core/package.json
@@ -14,67 +14,49 @@
   },
   "exports": {
     ".": {
-      "require": {
-        "types": "./dist/index.d.ts",
-        "default": "./dist/index.js"
-      },
       "types": "./dist/index.d.ts",
-      "default": "./dist/index.mjs"
+      "require": "./dist/index.js",
+      "import": "./dist/index.mjs"
     },
     "./model": {
-      "require": {
-        "types": "./dist/model.d.ts",
-        "default": "./dist/model.js"
-      },
       "types": "./dist/model.d.ts",
-      "default": "./dist/model.mjs"
+      "require": "./dist/model.js",
+      "import": "./dist/model.mjs"
     },
     "./utils": {
-      "require": {
-        "types": "./dist/utils/index.d.ts",
-        "default": "./dist/utils/index.js"
-      },
       "types": "./dist/utils/index.d.ts",
-      "default": "./dist/utils/index.mjs"
+      "require": "./dist/utils/index.js",
+      "import": "./dist/utils/index.mjs"
     },
     "./extensions": {
-      "require": {
-        "types": "./dist/extensions/index.d.ts",
-        "default": "./dist/extensions/index.js"
-      },
       "types": "./dist/extensions/index.d.ts",
-      "default": "./dist/extensions/index.mjs"
+      "require": "./dist/extensions/index.js",
+      "import": "./dist/extensions/index.mjs"
     },
     "./types": {
-      "require": {
-        "types": "./dist/types/index.d.ts",
-        "default": "./dist/types/index.js"
-      },
       "types": "./dist/types/index.d.ts",
-      "default": "./dist/types/index.mjs"
+      "require": "./dist/types/index.js",
+      "import": "./dist/types/index.mjs"
     },
     "./_shims": {
       "workerd": {
-        "require": "./dist/shims/shims-workerd.js",
         "types": "./dist/shims/shims-workerd.d.ts",
-        "default": "./dist/shims/shims-workerd.mjs"
+        "require": "./dist/shims/shims-workerd.js",
+        "import": "./dist/shims/shims-workerd.mjs"
       },
       "browser": {
-        "require": "./dist/shims/shims-browser.js",
         "types": "./dist/shims/shims-browser.d.ts",
-        "default": "./dist/shims/shims-browser.mjs"
+        "require": "./dist/shims/shims-browser.js",
+        "import": "./dist/shims/shims-browser.mjs"
       },
       "node": {
-        "require": "./dist/shims/shims-node.js",
         "types": "./dist/shims/shims-node.d.ts",
-        "default": "./dist/shims/shims-node.mjs"
-      },
-      "require": {
-        "types": "./dist/shims/shims-node.d.ts",
-        "default": "./dist/shims/shims-node.js"
+        "require": "./dist/shims/shims-node.js",
+        "import": "./dist/shims/shims-node.mjs"
       },
-      "types": "./dist/shims/shims-node.d.ts",
-      "default": "./dist/shims/shims-node.mjs"
+      "types": "./dist/shims/shims.d.ts",
+      "require": "./dist/shims/shims.js",
+      "import": "./dist/shims/shims.mjs"
     }
   },
   "keywords": [
diff --git a/packages/agents-core/src/shims/shims-node.ts b/packages/agents-core/src/shims/shims-node.ts
index 1bb0086d..8258d0d4 100644
--- a/packages/agents-core/src/shims/shims-node.ts
+++ b/packages/agents-core/src/shims/shims-node.ts
@@ -14,11 +14,18 @@ declare global {
 // circular dependency resolution issues caused by other exports in '@openai/agents-core/_shims'
 export function loadEnv(): Record<string, string | undefined> {
   if (typeof process === 'undefined' || typeof process.env === 'undefined') {
-    if (
-      typeof import.meta === 'object' &&
-      typeof import.meta.env === 'object'
-    ) {
-      return import.meta.env as unknown as Record<string, string | undefined>;
+    // In CommonJS builds, import.meta is not available, so we return empty object
+    try {
+      // Use eval to avoid TypeScript compilation errors in CommonJS builds
+      const importMeta = (0, eval)('import.meta');
+      if (
+        typeof importMeta === 'object' &&
+        typeof importMeta.env === 'object'
+      ) {
+        return importMeta.env as unknown as Record<string, string | undefined>;
+      }
+    } catch {
+      // import.meta not available (CommonJS build)
     }
     return {};
   }
diff --git a/packages/agents-core/src/shims/shims-workerd.ts b/packages/agents-core/src/shims/shims-workerd.ts
index 110cdb20..d183cbcc 100644
--- a/packages/agents-core/src/shims/shims-workerd.ts
+++ b/packages/agents-core/src/shims/shims-workerd.ts
@@ -15,11 +15,18 @@ declare global {
 // circular dependency resolution issues caused by other exports in '@openai/agents-core/_shims'
 export function loadEnv(): Record<string, string | undefined> {
   if (typeof process === 'undefined' || typeof process.env === 'undefined') {
-    if (
-      typeof import.meta === 'object' &&
-      typeof import.meta.env === 'object'
-    ) {
-      return import.meta.env as unknown as Record<string, string | undefined>;
+    // In CommonJS builds, import.meta is not available, so we return empty object
+    try {
+      // Use eval to avoid TypeScript compilation errors in CommonJS builds
+      const importMeta = (0, eval)('import.meta');
+      if (
+        typeof importMeta === 'object' &&
+        typeof importMeta.env === 'object'
+      ) {
+        return importMeta.env as unknown as Record<string, string | undefined>;
+      }
+    } catch {
+      // import.meta not available (CommonJS build)
     }
     return {};
   }
diff --git a/packages/agents-extensions/package.json b/packages/agents-extensions/package.json
index fbfdc61d..9026baf3 100644
--- a/packages/agents-extensions/package.json
+++ b/packages/agents-extensions/package.json
@@ -19,12 +19,9 @@
   },
   "exports": {
     ".": {
-      "require": {
-        "types": "./dist/index.d.ts",
-        "default": "./dist/index.js"
-      },
       "types": "./dist/index.d.ts",
-      "default": "./dist/index.mjs"
+      "require": "./dist/index.js",
+      "import": "./dist/index.mjs"
     }
   },
   "peerDependencies": {
diff --git a/packages/agents-openai/package.json b/packages/agents-openai/package.json
index 5a1750e3..6262e12d 100644
--- a/packages/agents-openai/package.json
+++ b/packages/agents-openai/package.json
@@ -9,12 +9,9 @@
   "types": "dist/index.d.ts",
   "exports": {
     ".": {
-      "require": {
-        "types": "./dist/index.d.ts",
-        "default": "./dist/index.js"
-      },
       "types": "./dist/index.d.ts",
-      "default": "./dist/index.mjs"
+      "require": "./dist/index.js",
+      "import": "./dist/index.mjs"
     }
   },
   "dependencies": {
diff --git a/packages/agents-realtime/package.json b/packages/agents-realtime/package.json
index 41452781..1fee1509 100644
--- a/packages/agents-realtime/package.json
+++ b/packages/agents-realtime/package.json
@@ -11,39 +11,33 @@
   "exports": {
     ".": {
       "browser": {
-        "require": "./dist/index.js",
-        "types": "./dist/index.d.ts",
-        "default": "./dist/index.mjs"
-      },
-      "require": {
         "types": "./dist/index.d.ts",
-        "default": "./dist/index.js"
+        "require": "./dist/index.js",
+        "import": "./dist/index.mjs"
       },
       "types": "./dist/index.d.ts",
-      "default": "./dist/index.mjs"
+      "require": "./dist/index.js",
+      "import": "./dist/index.mjs"
     },
     "./_shims": {
       "workerd": {
-        "require": "./dist/shims/shims-workerd.js",
         "types": "./dist/shims/shims-workerd.d.ts",
-        "default": "./dist/shims/shims-workerd.mjs"
+        "require": "./dist/shims/shims-workerd.js",
+        "import": "./dist/shims/shims-workerd.mjs"
       },
       "browser": {
-        "require": "./dist/shims/shims-browser.js",
         "types": "./dist/shims/shims-browser.d.ts",
-        "default": "./dist/shims/shims-browser.mjs"
+        "require": "./dist/shims/shims-browser.js",
+        "import": "./dist/shims/shims-browser.mjs"
       },
       "node": {
-        "require": "./dist/shims/shims-node.js",
         "types": "./dist/shims/shims-node.d.ts",
-        "default": "./dist/shims/shims-node.mjs"
-      },
-      "require": {
-        "types": "./dist/shims/shims-node.d.ts",
-        "default": "./dist/shims/shims-node.js"
+        "require": "./dist/shims/shims-node.js",
+        "import": "./dist/shims/shims-node.mjs"
       },
-      "types": "./dist/shims/shims-node.d.ts",
-      "default": "./dist/shims/shims-node.mjs"
+      "types": "./dist/shims/shims.d.ts",
+      "require": "./dist/shims/shims.js",
+      "import": "./dist/shims/shims.mjs"
     }
   },
   "typesVersions": {
diff --git a/packages/agents/package.json b/packages/agents/package.json
index b40c3437..0b882a3d 100644
--- a/packages/agents/package.json
+++ b/packages/agents/package.json
@@ -9,28 +9,19 @@
   "types": "dist/index.d.ts",
   "exports": {
     ".": {
-      "require": {
-        "types": "./dist/index.d.ts",
-        "default": "./dist/index.js"
-      },
       "types": "./dist/index.d.ts",
-      "default": "./dist/index.mjs"
+      "require": "./dist/index.js",
+      "import": "./dist/index.mjs"
     },
     "./realtime": {
-      "require": {
-        "types": "./dist/realtime/index.d.ts",
-        "default": "./dist/realtime/index.js"
-      },
       "types": "./dist/realtime/index.d.ts",
-      "default": "./dist/realtime/index.mjs"
+      "require": "./dist/realtime/index.js",
+      "import": "./dist/realtime/index.mjs"
     },
     "./utils": {
-      "require": {
-        "types": "./dist/utils/index.d.ts",
-        "default": "./dist/utils/index.js"
-      },
       "types": "./dist/utils/index.d.ts",
-      "default": "./dist/utils/index.mjs"
+      "require": "./dist/utils/index.js",
+      "import": "./dist/utils/index.mjs"
     }
   },
   "scripts": {
diff --git a/tsc-multi.json b/tsc-multi.json
index 104f0829..ddf444ca 100644
--- a/tsc-multi.json
+++ b/tsc-multi.json
@@ -1,6 +1,6 @@
 {
   "targets": [
-    { "extname": ".js", "module": "es2022", "moduleResolution": "node" },
+    { "extname": ".js", "module": "commonjs", "moduleResolution": "node" },
     { "extname": ".mjs", "module": "esnext" }
   ],
   "projects": [