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Sweep 02 Oct 2026 · 18:55Z Build v2.1.288 509 read Stable v2.1.285 Latest v2.1.288 Next v2.1.288 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.288 ·

New server-controlled switch that local overrides cannot turn on

A new switch, off unless turned on remotely, was added; a local override cannot enable it, and its purpose is not shown

Nothing to try yet In Development
JSON All of v2.1.288
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 v2.1.288,
In DevelopmentSection of the release
What

Claude Code now reads a new switch named tengu_violin_overstand. Anthropic's server sets this kind of switch for each account. It is off unless the server turns it on. If the value comes from a local override instead of the server, Claude Code treats the switch as off. If reading the switch fails, Claude Code reports the error and treats it as off.

The flag server returned this switch off for this site's account and on for an anonymous baseline account. Those readings come from before this release.

Why

The switch can only be turned on from the server side. Setting it yourself has no effect.

Read from
Feature flag
tengu_violin_overstand 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 v2.1.288: 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 v2.1.288. It isn't a statement about your account. What a flag value here can and cannot tell you

What has happened since
Flag reading moved The flag server now returns on for tengu_violin_overstand, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns off for tengu_violin_overstand, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns on for tengu_violin_overstand, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

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 this switch controls in Claude Code is not known.
The name it cites is new in this buildNew in this build: tengu_violin_overstand

See this entry in the whole of v2.1.288 →

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