What
The startup coordinator, the part that orders startup work when Claude Code runs headless (without its interactive screen, often driven by a program through the SDK), now takes takeClaimSessionStartHooks, sdkMcpServersPending and noteSdkEntryWait. It also tracks serversStartedSinceKick.
Why
This is internal startup plumbing for programmatic use of Claude Code. The finding shows the new inputs but not how startup behaves differently.
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The writer flagged doubt
The finding does not say what these inputs change about startup for someone using the SDK.