You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
Bug FixesKind: in v2.1.285,
Bug FixesSection of the release
What
An MCP server connects Claude Code to outside tools. A local MCP server talks to Claude Code through its standard input and output.
When connecting, Claude Code now sends one more message after the server accepts its subscription request. Some servers stop answering at that point, or exit. Claude Code then restarts the server once using the older way of connecting, which leaves out the subscription request. This must fit within the time left for connecting.
Why
Some servers used to hang at this step, including mark3labs/mcp-go before 1.1.1. They should now connect instead.
