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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
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Claude Code v2.1.119 ·

MCP Completion Support (McpCompletable)

Entry
JSON All of v2.1.119
EntryKind: in v2.1.119,
ChangesSection of the release
What

Added support for MCP completion/autocomplete of prompts and resource templates.

Details
  • New McpCompletable type registered as Symbol.for("mcp.completable")
  • Validates completion request types: prompts must use ref/prompt, resource templates must use ref/resource
  • Provides structured error messages: "Expected CompleteRequestPrompt, but got ..." / "Expected CompleteRequestResourceTemplate, but got ..."
Evidence

MCP completions (search for "McpCompletable", "mcp.completable", "Expected CompleteRequestPrompt")

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

See this entry in the whole of v2.1.119 →

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