make sure to bundle vendor before testing and add changeset

Author: ericallam

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

@@ -0,0 +1,7 @@
+---
+"@trigger.dev/core": patch
+---
+
+fix: vendor superjson to fix ESM/CJS compatibility
+
+Bundle superjson during build to avoid `ERR_REQUIRE_ESM` errors on Node.js versions that don't support `require(ESM)` by default (< 22.12.0) and AWS Lambda which intentionally disables it.

packages/core/package.json

@@ -162,7 +162,8 @@
     "bundle-vendor": "node scripts/bundle-superjson.mjs",
     "build": "pnpm run bundle-vendor && tshy && node scripts/bundle-superjson.mjs --copy && pnpm run update-version",
     "dev": "pnpm run bundle-vendor && tshy --watch",
-    "typecheck": "tsc --noEmit -p tsconfig.src.json",
+    "typecheck": "pnpm run bundle-vendor && tsc --noEmit -p tsconfig.src.json",
+    "pretest": "pnpm run bundle-vendor",
     "test": "vitest",
     "check-exports": "attw --pack ."
   },

packages/core/scripts/bundle-superjson.mjs

@@ -8,6 +8,9 @@
  * - Node.js versions before 22.12.0 (require(ESM) not enabled by default)
  * - AWS Lambda (intentionally disables require(ESM))
  *
+ * The output files are gitignored and regenerated during each build.
+ * This script runs automatically as part of `pnpm run build`.
+ *
  * Usage:
  *   node scripts/bundle-superjson.mjs          # Bundle to src/v3/vendor
  *   node scripts/bundle-superjson.mjs --copy   # Also copy to dist directories