You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SDKArea: what it touches
RemovedKind: in v2.1.310,
RemovedSection of the release
What
Claude Code used to carry a file called claude-code.d.ts packed inside itself. A file of this kind describes the shapes of data and functions for programming tools. It is no longer included.
Another bundled file, used for allowing tools, was also replaced with a different version.
Why
The type definitions are no longer shipped inside Claude Code. That could affect any feature that read them.