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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

tengu_patient_finch

flag in the build JSON

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.300, including the newest one read.

If a URL failed earlier in the session, WebFetch skips a quick second attempt and tells the model to say the page could not be read

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.300.

First seen v2.1.300 14 Oct 2026
Last seen v2.1.308 22 Oct 2026
Builds9 / 149on this box, as of v2.1.308
Written about v2.1.300 first named in a changelog, 14 Oct 2026
v2.1.300in the build not in the build never minedv2.1.308

In the changelogs

1

Releases whose published page names tengu_patient_finch.

  1. v2.1.300
    WebFetch won't quickly retry a page that just failed

    If a URL failed earlier in the session, WebFetch skips a quick second attempt and tells the model to say the page could not be read

    gate cited by this entry

Gate readings

1
ReleaseResolvedThis accountAnonymousCompiled default
v2.1.300 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

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
v2.1.300 – v2.1.3089 builds14 Oct 2026 → 22 Oct 2026 ◆in the build

Build by build

9

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
v2.1.30014 Oct 2026·addedverdict: added · default bool:true
v2.1.30115 Oct 2026·presentverdict: present · default bool:true
v2.1.30216 Oct 2026·presentverdict: present · default bool:true
v2.1.30318 Oct 2026·presentverdict: present · default bool:true
v2.1.30419 Oct 2026·presentverdict: present · default bool:true
v2.1.30520 Oct 2026·presentverdict: present · default bool:true
v2.1.30621 Oct 2026·presentverdict: present · default bool:true
v2.1.30721 Oct 2026·presentverdict: present · default bool:true
v2.1.30822 Oct 2026·presentverdict: present · default bool:true

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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