You'll notice
Useful4 Signal2
A late MCP reconnect can no longer clobber the tools and prompts of the connection you're using.
What's wrong with this entry?
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What
When an MCP server connection is re-established, Claude Code now checks whether a newer connection attempt has started since. If so it closes the connection it just made and publishes nothing, so a late-arriving reconnect cannot replace the tools, prompts and resources of the connection you are actually using.
Details
- The check runs after connecting and again after each
list_changedrefresh. - Stale connections are torn down through
detachAndCloseConnection.
Evidence
detachAndCloseConnection
Strings lifted out of the shipped bundle, so the claim above can be checked against them.