Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
DependenciesArea: what it touches
Internal ChangesKind: in v2.1.300,
Internal ChangesSection of the release
What
Claude Code includes zod, a library that checks data has the expected shape. Its error types are now locked when Claude Code loads, so nothing can change them afterwards. There is no visible effect.
Why
This is internal and does not change how you use Claude Code.
