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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 v2.1.311 ·

A server switch tied to session check-ins is read under a new name again

A server-controlled switch now goes by a different name; if the server sends nothing it still counts as on

Under the hood Internal Changes
JSON All of v2.1.311
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 v2.1.311,
Internal ChangesSection of the release
What

A switch the server can set is now read under the name tengu_glimmering_finch instead of tengu_zany_melody. Claude Code no longer reads the old name in that place. If the server sends nothing, the switch still counts as on, the same as before.

Why

Anything the server had set for the old name does not carry over to the new one. If the two are set differently, the behaviour can change for some accounts without any setting of yours changing.

Read from
Feature flag
tengu_glimmering_finch 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 v2.1.311: 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.

tengu_zany_melody 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 v2.1.311: 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 v2.1.311. It isn't a statement about your account. What a flag value here can and cannot tell you

How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: tengu_glimmering_finch

See this entry in the whole of v2.1.311 →

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