tengu_violin_bassbar
A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.282, including the newest one read.
CLAUDE_CODE_REMOTE_TOOLS_SPECULATIVE_CLASSIFIER is now read, but the code around it always gives the same answer, so setting it changes nothing
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.282.
In the changelogs
3Releases whose published page names tengu_violin_bassbar.
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v2.1.282
New remote-tools environment variable is read but has no effect yet
CLAUDE_CODE_REMOTE_TOOLS_SPECULATIVE_CLASSIFIERis now read, but the code around it always gives the same answer, so setting it changes nothinggate cited by this entry, found in this entry's text
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v2.1.282
New remote switch for link-preparation overlap, on by default
Something called link-preparation overlap is now controlled by a remote switch that is on by default, unless the server or a caller turns it off
gate cited by this entry
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v2.1.282
Attaching to a cloud session can set up its connection sooner
When attaching to a cloud session in serve mode, Claude Code can now prepare the connection while it reads the stream position, not afterwards
gate cited by this entry
Gate readings
1| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.282 read on another version | Not enough to say | no value returned | no value returned | on |
Two arms, because they disagree: this account is the one account this site reads and anonymous is a baseline with no identity attached. A reading says nothing about your account, and off cannot rule out a rollout both readings sit outside of. What these readings can and cannot show.
First cited
2The earliest release whose published evidence quoted tengu_violin_bassbar was v2.1.282, 24 Sep 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
Presence across releases
1Build by build
37One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the feature flag does. All feature flags.