Follow Discord
Sweep 08 Oct 2026 · 18:53Z Build v2.1.295 516 read Stable v2.1.286 Latest v2.1.295 Next v2.1.295 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeReleasesv2.1.290entry #489

Claude Code v2.1.290 ·

Two new server-controlled switches with unknown purposes

Two new switches set by Anthropic's servers are built in, one falling back to off and one to on

Under the hood Internal Changes
JSON All of v2.1.290
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
InternalsArea: what it touches
Internal ChangesKind: in v2.1.290,
Internal ChangesSection of the release

Unclear What either switch controls is not known.

What

Claude Code has two new switches that Anthropic's servers can set. When the server sends nothing, tengu_cobalt_plinth_sainfoin falls back to off and tengu_fizzy_treasure falls back to on.

Why

These let behaviour be changed remotely without a new release.

Read from
Feature flag
tengu_fizzy_treasure 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 v2.1.290: 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_cobalt_plinth_sainfoin 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 v2.1.290: 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 v2.1.290. 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 either switch controls is not known.
The name it cites is new in this buildNew in this build: tengu_cobalt_plinth_sainfoin

See this entry in the whole of v2.1.290 →

Feedback