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Sweep 03 Nov 2026 · 22:27Z Build v2.1.318 536 read Stable v2.1.311 Latest v2.1.318 Next v2.1.318 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.318 ·

A new hidden feature switch is in place

Claude Code now reads a new on or off switch from the server, which stays off when no value is sent

Nothing to try yet In Development
JSON All of v2.1.318
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 v2.1.318,
In DevelopmentSection of the release

Unclear It does not say what this switch controls.

What

Claude Code now reads a new on or off feature switch, tengu_glimmering_firefly, from Anthropic's server. It stays off unless it is switched on remotely. Nothing in this release shows what it controls.

Why

A switch that starts off like this usually means a feature is being prepared before it is turned on.

Read from
Feature flag
tengu_glimmering_firefly 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 v2.1.318: 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_lantern_sconce Off by default, switched on for this account

The shipped code defaults this off, and the flag server returned on for the one account this site reads on this version. That is the reading that makes the entry above worth a second look, and it still says nothing about your account.

This account: on · anonymous baseline: on · compiled default in v2.1.318: 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_vellum_siding 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 v2.1.318: 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 v2.1.318. 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 does not say what this switch controls.
The name it cites is new in this buildNew in this build: tengu_glimmering_firefly

See this entry in the whole of v2.1.318 →

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