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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 ·

A remotely controlled feature now stays off unless switched on

One remotely controlled feature now stays off unless the server turns it on, and stays off on errors, where before it defaulted to on

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

A feature controlled by tengu_violin_finetuner now runs only when the server explicitly switches it on. Before, it stayed on unless a server explicitly switched it off, and stayed on if reading the setting failed. Now it is off unless switched on remotely, and a failed read also leaves it off.

The flag server returned it as off for this site's account and on for the anonymous baseline, in readings not taken under this release.

Why

When the server sends nothing, you get this feature off where you used to get it on.

Read from
Feature flag
tengu_violin_finetuner 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_finetuner, 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_finetuner, 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_finetuner, 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 doubtIt is not clear what feature this setting controls.
The name it cites is new in this buildNew in this build: tengu_violin_finetuner

See this entry in the whole of v2.1.288 →

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