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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.308 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

tengu_russet_pergola

flag in the build JSON

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.277, including the newest one read.

A productivity-skills switch is named in the artifact code but nothing reads it.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.236.

First seen v2.1.277 18 Sep 2026
Last seen v2.1.309 22 Oct 2026
Builds8 / 150on this box, as of v2.1.309
Written about v2.1.236 first named in a changelog, 19 Aug 2026
v2.1.277in the build not in the build never minedv2.1.309

In the changelogs

1

Releases whose published page names tengu_russet_pergola.

  1. v2.1.236
    A productivity-skills flag is declared but nothing reads it

    A productivity-skills switch is named in the artifact code but nothing reads it.

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

Gate readings

0

No release here has a gate table behind it for this flag. Most published releases have none at all: the readings exist only for versions the pipeline captured flag state on.

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

7
BuildsHow manyDatesReading
v2.1.2771 build18 Sep 2026 ◆in the build
v2.1.278 – v2.1.2824 builds19 Sep 2026 → 24 Sep 2026 ○not in the build
v2.1.283 – v2.1.2842 builds25 Sep 2026 → 28 Sep 2026 ◆in the build
v2.1.285 – v2.1.30014 builds29 Sep 2026 → 14 Oct 2026 ○not in the build
v2.1.301 – v2.1.3044 builds15 Oct 2026 → 19 Oct 2026 ◆in the build
v2.1.305 – v2.1.3084 builds20 Oct 2026 → 22 Oct 2026 ○not in the build
v2.1.3091 build22 Oct 2026 ◆in the build

Build by build

30

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
v2.1.27718 Sep 2026·addedverdict: added · default unknown
v2.1.27819 Sep 2026·removedverdict: removed
v2.1.28022 Sep 2026·absent—
v2.1.28123 Sep 2026·absent—
v2.1.28224 Sep 2026·absent—
v2.1.28325 Sep 2026·addedverdict: added · default unknown
v2.1.28428 Sep 2026·presentverdict: present · default unknown
v2.1.28529 Sep 2026·removedverdict: removed
v2.1.28630 Sep 2026·absent—
v2.1.2871 Oct 2026·absent—
v2.1.2882 Oct 2026·absent—
v2.1.2893 Oct 2026·absent—
v2.1.2905 Oct 2026·absent—
v2.1.2916 Oct 2026·absent—
v2.1.2926 Oct 2026·absent—
v2.1.2937 Oct 2026·absent—
v2.1.2948 Oct 2026·absent—
v2.1.2958 Oct 2026·absent—
v2.1.2969 Oct 2026·absent—
v2.1.29914 Oct 2026·absent—
v2.1.30014 Oct 2026·absent—
v2.1.30115 Oct 2026·addedverdict: added · default unknown
v2.1.30216 Oct 2026·presentverdict: present · default unknown
v2.1.30318 Oct 2026·presentverdict: present · default unknown
v2.1.30419 Oct 2026·presentverdict: present · default unknown
v2.1.30520 Oct 2026·removedverdict: removed
v2.1.30621 Oct 2026·absent—
v2.1.30721 Oct 2026·absent—
v2.1.30822 Oct 2026·absent—
v2.1.30922 Oct 2026·addedverdict: added · default unknown

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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