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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.224 ·

All schema definitions rewritten to a smaller builder style

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

Under the hood Internal Changes
JSON All of v2.1.224
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
BuildArea: what it touches
Internal ChangesKind: in v2.1.224,
Internal ChangesSection of the release
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.

See this entry in the whole of v2.1.224 →

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