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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

tengu_swirling_boot

flag in the build JSON

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.319, including the newest one read.

When a site refuses WebFetch, a subagent may now be told browser tools on your computer are available, and paging notes are reworded

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.319.

First seen v2.1.319 6 Nov 2026
Last seen v2.1.319 6 Nov 2026
Builds1 / 159on this box, as of v2.1.319
Written about v2.1.319 first named in a changelog, 6 Nov 2026
v2.1.319in the build not in the build never minedv2.1.319

In the changelogs

1

Releases whose published page names tengu_swirling_boot.

  1. v2.1.319
    WebFetch failure messages can point Claude to browser tools

    When a site refuses WebFetch, a subagent may now be told browser tools on your computer are available, and paging notes are reworded

    gate cited by this entry, found in this entry's text

Gate readings

1
ReleaseResolvedThis accountAnonymousCompiled default
v2.1.319 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.

First cited

0

No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.

Presence across releases

1
BuildsHow manyDatesReading
v2.1.3191 build6 Nov 2026 ◆in the build

Build by build

1

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
v2.1.3196 Nov 2026·addedverdict: added · default number

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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