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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
HomeReleasesv2.1.242entry #113

Claude Code v2.1.242 ·

MCP servers reconnect automatically when the connection drops

Dropped MCP connections now retry with backoff, showing attempt counts before being marked failed.

You'll notice New Features
JSON All of v2.1.242
You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
New FeaturesKind: in v2.1.242,
What probably matters to youSection of the release
What

Connected MCP servers over HTTP or SSE now retry the connection with backoff when the transport closes, showing the server as pending with the current attempt number and the maximum, and marking it failed only after the attempts run out.

Details
  • Applies only to non-stdio, non-SDK servers; locally spawned stdio servers and in-process SDK servers are unaffected.
  • Pending state carries reconnectAttempt and maxReconnectAttempts; the terminal failure reads "Connection closed again while reconnecting".
  • The watcher is installed unconditionally with no flag, and stands down while another reconnect is already in flight or the run is shutting down.
Evidence

Connection closed again while reconnecting

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

See this entry in the whole of v2.1.242 →

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