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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.273 ·

Background spawn / fork now supports resuming at a specific leaf message

Forking a background session can now resume at a specific earlier message

Under the hood Bug Fixes
JSON All of v2.1.273
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SessionsArea: what it touches
Bug FixesKind: in v2.1.273,
Bug FixesSection of the release
What

The internal function used to spawn a background agent or fork a conversation now accepts a resumeAtLeaf option, letting it resume from a specific message rather than the latest one. If the conversation no longer actually contains that message as a valid fork point, it now returns a clear error: "Couldn't fork - the conversation no longer contains the fork point," instead of proceeding incorrectly.

Why

This lets background forks branch from a precise earlier point in a conversation, and fails clearly and safely if that point has since disappeared (for example, after history was pruned).

See this entry in the whole of v2.1.273 →

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