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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

MCP servers connect three at a time

MCP servers now connect three at a time; set MCP_SERVER_CONNECTION_BATCH_SIZE to change it.

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MCPArea: what it touches
ImprovementsKind: in v2.1.248,
What probably matters to youSection of the release
What

At startup MCP servers are now connected in batches rather than all at once. The batch size is 3 unless MCP_SERVER_CONNECTION_BATCH_SIZE is set.

Evidence

return a.MCP_SERVER_CONNECTION_BATCH_SIZE ?? 3;

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

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