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Sweep 12 Nov 2026 · 23:00Z Build v2.1.323 540 read Stable v2.1.311 Latest v2.1.323 Next v2.1.323 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.323 ·

Subagents can have several observers attached when they start

Starting a subagent now arms a list of observers instead of one, and waits on a cancellable step before setting up its tools

Under the hood Internal Changes
JSON All of v2.1.323
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SubagentsArea: what it touches
Internal ChangesKind: in v2.1.323,
Internal ChangesSection of the release

Unclear What, if anything, this changes that a user can see is not stated.

What

A subagent is a separate helper Claude starts to handle part of a task. When one starts, Claude Code can now attach several observers to it instead of a single one. It also waits for a step that can be cancelled before setting up the tools the subagent may use.

Why

This reworks, behind the scenes, how subagents are watched as they start.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat, if anything, this changes that a user can see is not stated.

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