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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.319 ·

One remote switch has been split into two

Behaviour that followed one remote switch is now split: part of it moves to a new switch, and both stay off by default

Under the hood Internal Changes
JSON All of v2.1.319
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
InternalsArea: what it touches
Internal ChangesKind: in v2.1.319,
Internal ChangesSection of the release

Unclear What each of the two switches controls is not shown.

What

Behaviour that used to follow a single remotely controlled switch, tengu_eventual_aho, is now split across two:

  • tengu_eventual_aho is still read when Claude Code builds a tool's instructions, and is now passed in there directly
  • tengu_lucid_bittern is a new switch that takes over another place that used to follow tengu_eventual_aho

Both stay off unless they are switched on remotely.

Why

The two parts can now be turned on separately rather than together.

Read from
Feature flag
tengu_lucid_bittern 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 v2.1.319: 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_eventual_aho 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 v2.1.319: 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 v2.1.319. 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 each of the two switches controls is not shown.
The name it cites is new in this buildNew in this build: tengu_lucid_bittern

See this entry in the whole of v2.1.319 →

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