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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 v2.1.238 ·

MCP suppression and capability handling reworked

An MCP server already suppressed as a duplicate is no longer probed for connection status.

Under the hood Internal Changes
JSON All of v2.1.238
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.238,
Internal ChangesSection of the release
What

The list of suppressed plugin servers is now readable by the tool layer, and a server already suppressed short-circuits its connection status rather than being probed.

Details
  • Prompt and resource "list changed" notifications are ignored unless a runtime check passes.
  • A client advertising no resources or prompts capability now returns an empty discovery result rather than bailing out early.
  • Cached server instructions are no longer re-applied from the discovery cache.
  • Servers whose plugin is no longer installed or enabled are dropped from the suppressed list, with a count logged.
Evidence

Dropping ${i.size} suppressed plugin server(s) whose plugin is no longer installed/enabled:

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

See this entry in the whole of v2.1.238 →

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