feat(nextjs): Allow PPR with auth()

[jacekradko]

Description

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

Summary by CodeRabbit

• Bug Fixes

  • Resolved prerendering errors when using auth() with Next.js 16 Cache Components, improving stability and compatibility with Next.js 16 and earlier versions.

• Chores

  • Added a changeset entry documenting a patch release for the package.

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[changeset-bot]

🦋 Changeset detected

Latest commit: a752d33

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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📝 Walkthrough

Walkthrough

A runtime guard was added to auth() that dynamically imports and on-demand invokes Next.js 16’s connection() to opt out of prerendering before request build. The guard invokes connection() when present and catches errors to rethrow prerendering bailouts; on older Next.js versions where connection() is absent, execution continues. A changeset was added for a patch release.

Pre-merge checks

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat(nextjs): Allow PPR with auth()' clearly indicates the main change: enabling Partial Pre-Rendering (PPR) support with the auth() function in Next.js, which aligns with the changeset's purpose of fixing prerendering errors.

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• packages/nextjs/src/app-router/server/auth.ts

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• packages/nextjs/src/app-router/server/auth.ts

🧬 Code graph analysis (1)

packages/nextjs/src/app-router/server/auth.ts (1)

packages/nextjs/src/app-router/server/utils.ts (1)

• isPrerenderingBailout (3-20)

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🔇 Additional comments (1)

packages/nextjs/src/app-router/server/auth.ts (1)

74-89: LGTM!

The PPR guard implementation correctly handles the connection() API availability across Next.js versions. The defensive typeof check and proper re-throwing of prerendering bailout errors ensures correct behavior in all scenarios.

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commit: a752d33