fix(metadata): add "type": "module" to fix ERR_MODULE_NOT_FOUND on Vercel

[Copilot]

Vercel serverless runtime resolves @objectstack/metadata to src/index.ts instead of compiled dist/ output, causing ERR_MODULE_NOT_FOUND at runtime in apps/studio/api/index.js.

Changes

• packages/metadata/package.json: Add "type": "module" and update exports from .mjs/.js to .js/.cjs — aligning with @objectstack/core, @objectstack/runtime, and @objectstack/rest which all resolve correctly on Vercel

+  "type": "module",
   "exports": {
     ".": {
-      "import": "./dist/index.mjs",
-      "require": "./dist/index.js"
+      "import": "./dist/index.js",
+      "require": "./dist/index.cjs"
     },

All 154 metadata tests and 13 studio tests pass. Build output verified: tsup correctly emits .js (ESM) and .cjs (CJS) with "type": "module".

Original prompt

2026-03-23 16:57:03.244 [error] Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/var/task/apps/studio/node_modules/@objectstack/metadata/src/index.ts' imported from /var/task/apps/studio/api/index.js
at finalizeResolution (node:internal/modules/esm/resolve:280:11)
at moduleResolve (node:internal/modules/esm/resolve:870:10)
at moduleResolveWithNodePath (node:internal/modules/esm/resolve:996:14)
at defaultResolve (node:internal/modules/esm/resolve:1039:79)
at #cachedDefaultResolve (node:internal/modules/esm/loader:718:20)
at #resolveAndMaybeBlockOnLoaderThread (node:internal/modules/esm/loader:735:38)
at ModuleLoader.resolveSync (node:internal/modules/esm/loader:764:52)
at #resolve (node:internal/modules/esm/loader:700:17)
at ModuleLoader.getOrCreateModuleJob (node:internal/modules/esm/loader:620:35)
at ModuleJob.syncLink (node:internal/modules/esm/module_job:143:33) {
code: 'ERR_MODULE_NOT_FOUND',
url: 'file:///var/task/apps/studio/node_modules/@objectstack/metadata/src/index.ts'
}
Node.js process exited with exit status: 1. The logs above can help with debugging the issue.
Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/var/task/apps/studio/node_modules/@objectstack/metadata/src/index.ts' imported from /var/task/apps/studio/api/index.js
at finalizeResolution (node:internal/modules/esm/resolve:280:11)
at moduleResolve (node:internal/modules/esm/resolve:870:10)
at moduleResolveWithNodePath (node:internal/modules/esm/resolve:996:14)
at defaultResolve (node:internal/modules/esm/resolve:1039:79)
at #cachedDefaultResolve (node:internal/modules/esm/loader:718:20)
at #resolveAndMaybeBlockOnLoaderThread (node:internal/modules/esm/loader:735:38)
at ModuleLoader.resolveSync (node:internal/modules/esm/loader:764:52)
at #resolve (node:internal/modules/esm/loader:700:17)
at ModuleLoader.getOrCreateModuleJob (node:internal/modules/esm/loader:620:35)
at ModuleJob.syncLink (node:internal/modules/esm/module_job:143:33) {
code: 'ERR_MODULE_NOT_FOUND',
url: 'file:///var/task/apps/studio/node_modules/@objectstack/metadata/src/index.ts'
}
Node.js process exited with exit status: 1. The logs above can help with debugging the issue.

---

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
spec	Ignored		Mar 23, 2026 5:18pm

[vercel]

Deployment failed with the following error:

Environment Variable "TURSO_DATABASE_URL" references Secret "turso_database_url", which does not exist.

Learn More: https://vercel.com/docs/environment-variables

[Copilot]

Pull request overview

This PR fixes a Vercel runtime resolution issue where @objectstack/metadata was being resolved to src/index.ts instead of the compiled dist/ output by aligning the package’s ESM/CJS metadata with the rest of the monorepo packages that work correctly on Vercel.

Changes:

• Added "type": "module" to @objectstack/metadata and updated exports to use the .js (ESM) / .cjs (CJS) pattern.
• Added a changelog entry documenting the Vercel ERR_MODULE_NOT_FOUND fix.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/metadata/package.json	Switches the package to ESM via "type": "module" and updates exports mappings to point to the correct compiled artifacts (.js/.cjs).
packages/metadata/CHANGELOG.md	Documents the runtime fix for Vercel module resolution.

[Copilot]

The inline code snippet in the changelog includes escaped quotes (\"type\": \"module\"), which will render the backslashes in Markdown. Use unescaped quotes inside the backticks so it displays as "type": "module" without backslashes in the rendered output.