Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.224 Home All releases olderv2.1.223 v2.1.225newer

All schema definitions rewritten to a smaller builder style

Under the hood
Useful1 Signal1
Build

Every schema in the bundle moved to standalone builder functions to cut size.

What

Every schema in the bundle, covering tool inputs and outputs, plugin manifests, settings, memory and artifacts, was rewritten from the namespaced schema builders to standalone functions. Field names, descriptions and validation behave the same; this is a bundle-size change.

Details
  • The previous build has 1486 uses of the namespaced string builder and 569 of the namespaced object builder; this build has none of either, with roughly 963 direct object builder call sites.
  • Example: a hook type that was a namespaced literal with the description "MCP tool hook type" is now a bare literal call, and its server field a bare string call described as the name of an already-configured MCP server to invoke.
  • The error instance check switched to the corresponding direct class. Several hunks in this group are only the resulting reformatting.
Evidence

w.object(, MCP tool hook type

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.224 →