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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 v2.1.309 ·

Messages can now record who started each turn

Behind a server-controlled switch, messages can carry a note of the summary they belong to and whether a person started the turn

Nothing to try yet In Development
JSON All of v2.1.309
Nothing to try yetTier: how much it should matter to you
3Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
SessionsArea: what it touches
In DevelopmentKind: in v2.1.309,
What probably matters to youSection of the release

Unclear It is not clear whether this changes anything you see or how Claude responds.

What

Behind a switch the server controls, each message in a conversation can now carry extra information:

  • an identifier for a related summary
  • whether the turn was started by a person, by a person in this session, and in the session user's own words

If collecting any of this fails, the extra information is left off and the message is unchanged.

Why

This appears to let summarised conversations remember who started each turn.

Read from
Feature flag
tengu_soft_spindle Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.309: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.309. It isn't a statement about your account. What a flag value here can and cannot tell you

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 doubtIt is not clear whether this changes anything you see or how Claude responds.
The name it cites is new in this buildNew in this build: tengu_soft_spindle

See this entry in the whole of v2.1.309 →

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