`tengu_wobbly_petal`

flag in the build JSON

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.311, including the newest one read.

Claude Code reads a new server setting naming the model families and SDK hosts that hold a fork, plus a time window; with no server value nothing is held

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.311.

First seen v2.1.311 26 Oct 2026

Last seen v2.1.314 30 Oct 2026

Builds3 / 154on this box, as of v2.1.314

Written about v2.1.311 first named in a changelog, 26 Oct 2026

v2.1.311in the build not in the build never minedv2.1.314

In the changelogs

Releases whose published page names tengu_wobbly_petal.

v2.1.311 26 Oct 2026
A server setting can now choose which sessions hold a fork
Claude Code reads a new server setting naming the model families and SDK hosts that hold a fork, plus a time window; with no server value nothing is held

gate cited by this entry

Gate readings

Release	Resolved	This account	Anonymous	Compiled default
v2.1.311 read on another version	Not enough to say	no value returned	no value returned	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

Read as	Reading	From	Until	Version installed
anonymous	{"sdkHosts":true,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T19:25:04Z	2026-10-30T19:40:05Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T18:35:04Z	2026-10-30T19:40:05Z	v2.1.314
anonymous	null	2026-10-24T05:45:04Z	2026-10-30T19:05:05Z	v2.1.310 to v2.1.314
this account	null	2026-10-30T14:25:04Z	2026-10-30T18:25:05Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T12:35:04Z	2026-10-30T13:50:04Z	v2.1.314
this account	null	2026-10-30T11:35:07Z	2026-10-30T11:35:07Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T10:00:06Z	2026-10-30T10:00:06Z	v2.1.314
this account	null	2026-10-30T08:25:04Z	2026-10-30T09:05:04Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T06:10:04Z	2026-10-30T08:20:05Z	v2.1.314
this account	null	2026-10-30T05:35:04Z	2026-10-30T05:35:04Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T05:20:05Z	2026-10-30T05:20:05Z	v2.1.314
this account	null	2026-10-30T04:05:06Z	2026-10-30T05:15:04Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T03:45:03Z	2026-10-30T04:00:04Z	v2.1.314
this account	null	2026-10-30T03:05:04Z	2026-10-30T03:35:04Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T02:45:05Z	2026-10-30T02:45:05Z	v2.1.314
this account	null	2026-10-30T02:35:04Z	2026-10-30T02:35:04Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T02:25:04Z	2026-10-30T02:25:04Z	v2.1.314
this account	null	2026-10-30T02:05:05Z	2026-10-30T02:05:05Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T02:00:07Z	2026-10-30T02:00:07Z	v2.1.314
this account	null	2026-10-30T01:35:04Z	2026-10-30T01:35:04Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-30T01:00:09Z	2026-10-30T01:20:06Z	v2.1.312 to v2.1.314
this account	null	2026-10-30T00:55:13Z	2026-10-30T00:55:13Z	v2.1.314
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-29T22:25:04Z	2026-10-30T00:35:04Z	v2.1.312
this account	null	2026-10-29T22:05:04Z	2026-10-29T22:05:04Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-29T17:40:06Z	2026-10-29T20:50:04Z	v2.1.312
this account	null	2026-10-29T16:05:04Z	2026-10-29T17:10:04Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-29T10:05:05Z	2026-10-29T15:45:04Z	v2.1.312
this account	null	2026-10-29T09:40:04Z	2026-10-29T09:40:04Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-29T05:30:04Z	2026-10-29T08:45:04Z	v2.1.312
this account	null	2026-10-29T04:55:04Z	2026-10-29T05:20:04Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-29T04:00:08Z	2026-10-29T04:35:04Z	v2.1.312
this account	null	2026-10-29T03:20:05Z	2026-10-29T03:40:04Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-28T23:30:09Z	2026-10-29T03:10:06Z	v2.1.312
this account	null	2026-10-28T22:55:04Z	2026-10-28T23:20:06Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-28T17:30:06Z	2026-10-28T21:50:05Z	v2.1.312
this account	null	2026-10-28T16:55:05Z	2026-10-28T17:20:04Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-28T11:30:07Z	2026-10-28T16:10:05Z	v2.1.312
this account	null	2026-10-28T10:55:04Z	2026-10-28T11:05:04Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-28T05:05:04Z	2026-10-28T10:10:05Z	v2.1.312
this account	null	2026-10-28T04:55:04Z	2026-10-28T04:55:04Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-28T04:50:04Z	2026-10-28T04:50:04Z	v2.1.312
this account	null	2026-10-28T04:20:05Z	2026-10-28T04:45:05Z	v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-28T04:15:04Z	2026-10-28T04:15:04Z	v2.1.312
this account	null	2026-10-27T19:40:06Z	2026-10-28T04:10:04Z	v2.1.311 to v2.1.312
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-27T19:15:05Z	2026-10-27T19:30:05Z	v2.1.311
this account	null	2026-10-27T17:55:05Z	2026-10-27T19:05:05Z	v2.1.311
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-27T17:50:05Z	2026-10-27T17:50:05Z	v2.1.311
this account	null	2026-10-27T15:20:05Z	2026-10-27T17:45:04Z	v2.1.311
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-27T13:15:05Z	2026-10-27T13:45:08Z	v2.1.311
this account	null	2026-10-27T10:30:05Z	2026-10-27T12:55:05Z	v2.1.311
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-27T10:20:04Z	2026-10-27T10:20:04Z	v2.1.311
this account	null	2026-10-27T09:20:04Z	2026-10-27T10:00:06Z	v2.1.311
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-27T07:15:04Z	2026-10-27T07:15:04Z	v2.1.311
this account	null	2026-10-27T05:25:04Z	2026-10-27T06:55:04Z	v2.1.311
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-27T04:55:05Z	2026-10-27T05:10:05Z	v2.1.311
this account	null	2026-10-27T04:50:04Z	2026-10-27T04:50:04Z	v2.1.311
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-27T04:40:04Z	2026-10-27T04:45:04Z	v2.1.311
this account	null	2026-10-27T04:30:05Z	2026-10-27T04:35:04Z	v2.1.311
this account	{"sdkHosts":false,"sessionModelFamilies":["sonnet","opus","haiku","fable","other"]}	2026-10-27T04:25:04Z	2026-10-27T04:25:04Z	v2.1.311
this account	null	2026-10-27T04:20:04Z	2026-10-27T04:20:04Z	v2.1.311

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

The earliest release whose published evidence quoted tengu_wobbly_petal was v2.1.311, 26 Oct 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.

ReleaseDateThe span that was quoted

v2.1.31126 Oct 2026tengu_wobbly_petal

Presence across releases

BuildsHow manyDatesReading

v2.1.311 – v2.1.3143 builds26 Oct 2026 → 30 Oct 2026 ◆in the build

Build by build

One 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.

BuildDateStateThe record behind it

v2.1.31126 Oct 2026·addedverdict: added · default null

v2.1.31227 Oct 2026·presentverdict: present · default null

v2.1.31430 Oct 2026·presentverdict: present · default null

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.

Names beside it

Every feature flag in the inventory starting tengu_wobbly, up to twelve of them.

tengu_wobbly_dahl v2.1.290
Claude Code can tell the model the user pays per token and what a Bash call costs, but both notes fall back to off
tengu_wobbly_dewdrop never mined
Creating files through the Google Drive connector is now controlled by a different remote switch and can take plain text content
tengu_wobbly_fern v2.1.229
If a request is too big, you're told whether dropping attachments or compacting would help.
tengu_wobbly_pinwheel v2.1.234
Scripted sessions now get a stream-json status message whenever the permission mode changes.

Documentation pages 0

None of Anthropic's documentation pages this site has a copy of carries this name.