What
The library Claude Code bundles for checking data shapes now has a properties schema type.
Why
This looks internal, and no change you would notice is described.
Built-in schema library gains a properties type
The schema-checking library bundled with Claude Code now has a properties schema type, with no visible effect described
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