fix(nextjs): declare dist/esm as ESM via type:module sidecar

[jacekradko]

Summary

• Add "type": "module" to packages/nextjs/package.esm.json so dist/esm/package.json declares the bundled ESM output as ESM. Node 22+ and tsx consumers under "type": "module" can now import named exports from @clerk/nextjs/server without the SyntaxError: does not provide an export named 'clerkClient' reported in dist/esm lacks 'type: module' metadata — breaks @clerk/nextjs on Node 22+ under type:module consumers #8396.
• Swap lint:attw --ignore-rules unexpected-module-syntax for --ignore-rules false-cjs. With type: module set, unexpected-module-syntax stops firing, but attw now flags false-cjs on every subpath because type declarations are still emitted as .d.ts. Splitting types to .d.mts is tracked as a separate follow-up.
• Add a patch changeset.

Closes #8396

Test plan

• pnpm --filter @clerk/nextjs build succeeds and dist/esm/package.json contains "type": "module"
• pnpm --filter @clerk/nextjs lint:attw passes with the swapped ignore rule
• pnpm --filter @clerk/nextjs lint:publint passes (pre-existing warnings unchanged)
• pnpm --filter @clerk/nextjs test — no new regressions
• Reporter's exact repro (tsx + import { clerkClient } from '@clerk/nextjs/server' under "type": "module") now prints clerkClient typeof: function; fails on main with the reported error

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Skipped		Apr 24, 2026 1:06am

[changeset-bot]

🦋 Changeset detected

Latest commit: 05425f5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@clerk/nextjs	Patch

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• packages/nextjs/src/experimental.ts

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📝 Walkthrough

Walkthrough

The PR adds a Changesets release note and updates package metadata to mark the ESM build as an ES module by adding "type": "module" to packages/nextjs/package.esm.json. It adjusts packages/nextjs/package.json's lint:attw script to ignore false-cjs instead of unexpected-module-syntax. It also replaces a wildcard re-export in packages/nextjs/src/experimental.ts with explicit named value and type-only exports for several experimental components and hooks.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding type:module to package.esm.json to declare dist/esm as ESM.
Description check	✅ Passed	The description comprehensively explains the fix, rationale, and test results related to the ESM declaration issue.
Linked Issues check	✅ Passed	All code changes directly address #8396: adding type:module to package.esm.json enables ESM declaration; lint rule swap handles the resulting attw output; explicit re-exports resolve client-boundary issues from ESM declaration.
Out of Scope Changes check	✅ Passed	All changes are within scope: package.esm.json modification, lint rule swap, changeset addition, and experimental.ts re-export refactoring all directly support the ESM declaration objective.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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commit: 05425f5