---
title: Check
description: codemod fail the build until you resolve them.
lastModified: "2026-10-07T14:08:15+01:00"
lastAuthor: Kaylee
---
## Check the migration

1. Run your typecheck and build. Remaining `TODO(c15t v3)` comments from the
   codemod fail the build until you resolve them.
2. Load the app with a v2 consent cookie from before the upgrade. The banner
   stays closed if that choice still applies, and a rejected category stays
   blocked.
3. In a private window, check in DevTools Network that vendor requests wait for
   consent, start after you accept, and stay absent after you reject and
   reload.
4. Reopen preferences from your privacy settings link and change a category.

The [verification guide](/docs/guides/verify-consent) has the full release
checklist.