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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 v2.1.234 ·

MCP server startup names its transport and registers a shutdown hook

The MCP server names stdio explicitly and closes cleanly on shutdown; an http mode exists uncalled.

Under the hood Nothing to try yet In Development
JSON All of v2.1.234
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
MCPArea: what it touches
In DevelopmentKind: in v2.1.234,
What probably matters to youSection of the release

The builder accepts an http kind that disables background tasks and unsandboxed commands, but no caller requests it.

What

The startup path for Claude Code's MCP server now explicitly asks for the stdio transport and registers a hook that closes the server on shutdown. The builder accepts an alternative http kind that disables background tasks and unsandboxed commands before serving; no caller in this build requests it.

Evidence

createMCPServer

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

See this entry in the whole of v2.1.234 →

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