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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 v2.1.227 ·

MCP connection timeouts are retried and never undercut the global timeout

MCP connect timeouts now respect the global timeout and get retried instead of failing.

You'll notice Notable Improvements
JSON All of v2.1.227
You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.227,
What probably matters to youSection of the release
What

The connect timeout for an MCP server is now the larger of that server's own value and the global MCP timeout, so a small per-server value can no longer make connections fail early. Connection timeouts are tagged CONNECT_TIMEOUT and retried instead of failing outright, including timeouts raised by the MCP SDK itself. Controlled by the tengu_mcp_connect_timeout_retry flag, which is on unless the server turns it off.

Details
  • the SDK's own RequestTimeout error is mapped onto the same CONNECT_TIMEOUT code so it retries too
Evidence

tengu_mcp_connect_timeout_retry

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

Read from
Feature flag
tengu_mcp_connect_timeout_retry Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.227: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.227. It isn't a statement about your account. What a flag value here can and cannot tell you

How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: tengu_mcp_connect_timeout_retry

See this entry in the whole of v2.1.227 →

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