fix(core): vendor superjson to fix CJS compatibility issue

This fixes the ERR_REQUIRE_ESM error that occurs when using @trigger.dev/core
in CJS environments with Node.js versions < 22.12. The superjson package (v2.x)
is ESM-only, but Node.js doesn't support require() of ESM modules in older
versions.

The fix bundles superjson@2.2.1 using esbuild into both CJS and ESM formats,
which are then imported by the existing wrapper modules. This ensures the
package works correctly in all environments without relying on Node.js's
experimental require(ESM) feature.

Fixes #2937

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: github-actions[bot]

.changeset/vendor-superjson-cjs-fix.md

@@ -0,0 +1,9 @@
+---
+"@trigger.dev/core": patch
+---
+
+Vendor superjson to fix CJS compatibility issue
+
+This fixes the `ERR_REQUIRE_ESM` error that occurs when using `@trigger.dev/core` in CJS environments with Node.js versions < 22.12. The superjson package (v2.x) is ESM-only, but Node.js doesn't support `require()` of ESM modules in older versions.
+
+The fix bundles superjson@2.2.1 using esbuild into both CJS and ESM formats, which are then imported by the existing wrapper modules. This ensures the package works correctly in all environments without relying on Node.js's experimental `require(ESM)` feature.

packages/core/src/v3/imports/superjson-cjs.cts

@@ -1,8 +1,19 @@
-// @ts-ignore
-const { default: superjson } = require("superjson");
+/**
+ * Vendored superjson import (CJS version)
+ *
+ * This module provides a bundled version of superjson that works in CJS
+ * environments without relying on Node.js's experimental require(ESM) feature.
+ *
+ * The bundle is created from superjson@2.2.1 using esbuild.
+ */
 
-// @ts-ignore
-superjson.registerCustom<Buffer, number[]>(
+// @ts-ignore - Pre-built bundle doesn't have TS declarations
+// eslint-disable-next-line @typescript-eslint/no-require-imports
+const superjson = require("../vendor/superjson.cjs");
+
+// Register Buffer serialization for Node.js environments
+// @ts-ignore - Type assertions not needed for runtime behavior
+superjson.registerCustom(
   {
     isApplicable: (v: unknown): v is Buffer => typeof Buffer === "function" && Buffer.isBuffer(v),
     serialize: (v: Buffer) => [...v],

packages/core/src/v3/imports/superjson.ts

@@ -1,14 +1,23 @@
-// @ts-ignore
-import superjson from "superjson";
+/**
+ * Vendored superjson import
+ *
+ * This module provides a bundled version of superjson that works in both ESM and CJS
+ * environments without relying on Node.js's experimental require(ESM) feature.
+ *
+ * The bundle is created from superjson@2.2.1 using esbuild.
+ */
 
+// @ts-ignore - Pre-built bundle doesn't have TS declarations
+import superjson from "../vendor/superjson.js";
+
+// Register Buffer serialization for Node.js environments
 superjson.registerCustom<Buffer, number[]>(
   {
-    isApplicable: (v): v is Buffer => typeof Buffer === "function" && Buffer.isBuffer(v),
-    serialize: (v) => [...v],
-    deserialize: (v) => Buffer.from(v),
+    isApplicable: (v: unknown): v is Buffer => typeof Buffer === "function" && Buffer.isBuffer(v),
+    serialize: (v: Buffer) => [...v],
+    deserialize: (v: number[]) => Buffer.from(v),
   },
   "buffer"
 );
 
-// @ts-ignore
 export default superjson;