Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.271,
Internal ChangesSection of the release
What
During interactive startup, after the existing wait for MCP servers to be ready (mcp_prewait_ms), Claude Code now also waits for and measures a new firstCommandMountJoin step before running the first command.
Why
This adds visibility into another part of startup timing, letting slowdowns before the first command runs be tracked more precisely.
