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Sweep 27 Oct 2026 · 19:04Z Build v2.1.312 531 read Stable v2.1.308 Latest v2.1.312 Next v2.1.312 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.312 ·

A new remote on/off switch that defaults to off

Claude Code now checks a new remotely controlled switch that stays off when the server sends nothing; what it controls is not yet visible

Nothing to try yet In Development
JSON All of v2.1.312
Nothing to try yetTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
InternalsArea: what it touches
In DevelopmentKind: in v2.1.312,
In DevelopmentSection of the release

Unclear What feature or behaviour this switch controls is not known.

What

Claude Code now reads a new remote setting called tengu_soft_spark. A remote setting is an on/off switch that Anthropic's servers can flip without shipping a new version. If the server sends no value, Claude Code treats this one as off.

Why

In practice nothing changes for you unless the switch is turned on remotely. It is most likely groundwork for a feature that has not appeared yet.

Read from
Feature flag
tengu_soft_spark 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 v2.1.312: off

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 v2.1.312. 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 doubtWhat feature or behaviour this switch controls is not known.
The name it cites is new in this buildNew in this build: tengu_soft_spark

See this entry in the whole of v2.1.312 →

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