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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 hidden feature check now listens to a different remote switch

A hidden feature check now depends on a different remote switch, and stays off unless that switch is turned on from the server

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 It is not known what behaviour this check controls.

What

Claude Code has a check that decides whether a hidden piece of behaviour runs. It used to depend on a remote switch called tengu_gable_onyx_sluice. It now depends on a different remote switch, tengu_peppy_nest, together with a different local condition. A remote switch is a setting that Anthropic's servers can turn on or off for an account.

The new switch is off unless the server turns it on. In readings taken before this release, it was off for this site's account and also off for an anonymous check.

Why

Whatever this check guards is still off by default. Because the switch has a new name, any rollout that was already done under the old name does not carry over.

Read from
Feature flag
tengu_peppy_nest Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · 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.

tengu_gable_onyx_sluice 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: not a boolean we can read

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 doubtIt is not known what behaviour this check controls.
The name it cites is new in this buildNew in this build: tengu_peppy_nest

See this entry in the whole of v2.1.312 →

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