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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 v2.1.221 ·

MCP connection dial-out deduped by a once-guard

MCP tool and command collection is less likely to hang or finish twice.

You'll notice Internal Changes
JSON All of v2.1.221
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.221,
Internal ChangesSection of the release
What

The routine that walks connected clients to collect tools and commands now uses an explicit once-guard closure instead of counting callbacks against an expected total.

Details
  • Completion can now fire from triggers other than the last callback without double-resolving.
  • Previously the count had to match exactly for the routine to settle.
Evidence

ensureConnectedClient

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

See this entry in the whole of v2.1.221 →

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