What probably matters to youSection of the release
What
MCP servers are add-ons that give Claude extra tools. When Claude Code runs headless (without the interactive screen), it can wait at start-up for the servers named in CLAUDE_CODE_MCP_PREWAIT_SERVERS to be ready. That wait can now be told to leave some servers out, and it then holds only for the remaining named servers. Before, it waited on every named server until the deadline.
Why
Start-up spends less time waiting on servers that do not need to be held for.
