Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.238 Home All releases olderv2.1.237 v2.1.239newer
Claude Code v2.1.238

MCP suppression and capability handling reworked

Under the hood
Useful2 Signal2
MCP

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

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 →