tengu_violin_strad
A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.238, including the newest one read.
Remote sessions could inherit your local permission mode and effort level, but no value is compiled in.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.238.
In the changelogs
2Releases whose published page names tengu_violin_strad.
-
v2.1.284
Remote sessions from the desktop app no longer need an extra flag
Remote sessions started from the Claude desktop app now depend on the same single flag as every other starting point
gate cited by this entry
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v2.1.238
Carrying and reporting your local permission mode in remote sessions is gated off
Remote sessions could inherit your local permission mode and effort level, but no value is compiled in.
gate cited by this entry, found in this entry's text
Gate readings
2| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.284 read on another version | Off by default, switched on for this account | on | on | off |
| v2.1.238 | Off in both readings | off | off | not a boolean we can read |
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.
Flag server, over time
14| Read as | Reading | From | Until | Version installed |
|---|---|---|---|---|
| anonymous | off | 2026-10-17T05:30:04Z | 2026-10-22T08:25:04Z | v2.1.302 to v2.1.308 |
| this account | off | 2026-10-02T18:55:06Z | 2026-10-22T08:25:04Z | v2.1.287 to v2.1.308 |
| anonymous | no longer carried | 2026-10-17T05:25:57Z | 2026-10-17T05:25:57Z | v2.1.302 |
| anonymous | off | 2026-10-02T18:55:06Z | 2026-10-17T05:10:04Z | v2.1.287 to v2.1.302 |
| this account | on | 2026-09-22T17:25:08Z | 2026-10-02T18:50:06Z | v2.1.280 to v2.1.287 |
| anonymous | on | 2026-09-22T17:20:06Z | 2026-10-02T18:50:06Z | v2.1.280 to v2.1.287 |
| this account | off | 2026-09-10T21:47:12Z | 2026-09-22T17:20:06Z | v2.1.268 to v2.1.280 |
| anonymous | off | 2026-08-19T17:35:06Z | 2026-09-22T17:15:06Z | v2.1.233 to v2.1.280 |
| this account | no longer carried | 2026-09-10T21:46:45Z | 2026-09-10T21:46:45Z | v2.1.268 |
| this account | off | 2026-09-08T20:36:15Z | 2026-09-10T17:40:05Z | v2.1.263 to v2.1.267 |
| this account | no longer carried | 2026-09-08T20:34:58Z | 2026-09-08T20:34:58Z | v2.1.265 |
| this account | off | 2026-09-06T02:40:05Z | 2026-09-08T18:45:05Z | v2.1.261 to v2.1.263 |
| this account | no longer carried | 2026-09-06T02:36:19Z | 2026-09-06T02:36:19Z | v2.1.263 |
| this account | off | 2026-08-19T19:00:07Z | 2026-09-06T01:55:04Z | v2.1.233 to v2.1.261 |
One row per unbroken stretch of one reading, newest first, from snapshots taken every twenty-five minutes or so. No longer carried is not off: it means the flag server stopped returning the gate at all, which is what a retired experiment looks like. The version column is what was installed when the reading was taken, not what caused it.
First cited
1The earliest release whose published evidence quoted tengu_violin_strad was v2.1.238, 20 Aug 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
60One 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.