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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.277 ·

Transport allocator adds backpressure and refusal callbacks

The data-transport layer gained backpressure detection and refusal callbacks instead of always resending

Under the hood Internal Changes
JSON All of v2.1.277
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Internal ChangesKind: in v2.1.277,
Internal ChangesSection of the release
What

The internal channel/frame allocator that manages data transport (its allocate, transmit, and free operations) now supports:

  • an onRefused callback that can run per allocation
  • backpressure detection (isBackedUp) checked before resending data
  • tracking of orphaned sequences when an allocation is freed
  • a resend flag on transmit, instead of the previous model of always resending
Why

This makes the underlying transport more resilient: it can now detect when it's sending faster than the other side can handle (backpressure) and react to refused sends, rather than blindly resending every time.

See this entry in the whole of v2.1.277 →

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