Skew Protection now supports prebuilt deployments

Skew Protection can now be used with vercel deploy --prebuilt deployments.

For teams building locally and uploading with --prebuilt, you can now set a custom deploymentId in your next.config.js:

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module.exports = {
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  deploymentId: process.env.GIT_SHA || 'my-deployment-id',
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}

This ID is written to routes-manifest.json and used by Vercel for skew protection routing. You control the ID lifecycle, using the same ID across multiple prebuilt deployments or updating it when deploying new versions.

This feature enables Skew Protection support for the specific workflow of building applications locally and then uploading them to Vercel.

Learn more about Skew Protection.