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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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tengu_rustling_crescent

flag in the build JSON

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.307, including the newest one read.

Claude Code can list the subagents that ran earlier in a session, off unless CLAUDE_CODE_SUBAGENT_HISTORY is set or it is switched on remotely

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.307.

First seen v2.1.307 21 Oct 2026
Last seen v2.1.308 22 Oct 2026
Builds2 / 149on this box, as of v2.1.308
Written about v2.1.307 first named in a changelog, 21 Oct 2026
v2.1.307in the build not in the build never minedv2.1.308

In the changelogs

1

Releases whose published page names tengu_rustling_crescent.

  1. v2.1.307
    A list of earlier subagents in a session, off unless switched on

    Claude Code can list the subagents that ran earlier in a session, off unless CLAUDE_CODE_SUBAGENT_HISTORY is set or it is switched on remotely

    gate cited by this entry

Gate readings

1
ReleaseResolvedThis accountAnonymousCompiled default
v2.1.307 read on another version Not enough to say no value returned no value returned off

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

1

The earliest release whose published evidence quoted tengu_rustling_crescent was v2.1.307, 21 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
v2.1.30721 Oct 2026a.CLAUDE_CODE_SUBAGENT_HISTORY ?? k("tengu_rustling_crescent", !1)

Presence across releases

1
BuildsHow manyDatesReading
v2.1.307 – v2.1.3082 builds21 Oct 2026 → 22 Oct 2026 ◆in the build

Build by build

2

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
v2.1.30721 Oct 2026·addedverdict: added · default bool:false
v2.1.30822 Oct 2026·presentverdict: present · default bool:false

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.

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