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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeReleasesv2.1.221entry #113

Claude Code v2.1.221 ·

MCP elicitation schemas are validated with a clear error

A bad MCP elicitation schema now shows a clear error instead of a misleading reconnect message.

You'll notice Improvements
JSON All of v2.1.221
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.221,
ImprovementsSection of the release
What

A malformed requestedSchema in an MCP elicitation now produces an InvalidParams error naming the constraint, rather than a misleading reconnect message.

Details
  • parse failure on requestedSchema is converted into an MCP InvalidParams error explaining the constraint
  • the completion notification handler is registered against the literal method name notifications/elicitation/complete
Evidence

notifications/elicitation/complete

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

See this entry in the whole of v2.1.221 →

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