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_gorse_pylon was v2.1.232, 13 Aug 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
v2.1.23213 Aug 2026return Y.CLAUDE_CODE_ARTIFACT_COMMENT_FAST_ACK ?? rt("tengu_gorse_pylon", !1);
Presence across releases
1
BuildsHow manyDatesReading
v2.1.232 – v2.1.30967 builds13 Aug 2026 → 22 Oct 2026 ◆in the build
Build by build
67
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
v2.1.23213 Aug 2026·addedverdict: added · default bool:false
v2.1.23314 Aug 2026·presentverdict: present · default bool:false
v2.1.23417 Aug 2026·presentverdict: present · default bool:false
v2.1.23518 Aug 2026·presentverdict: present · default bool:false
v2.1.23619 Aug 2026·presentverdict: present · default bool:false
v2.1.23719 Aug 2026·presentverdict: present · default bool:false
v2.1.23820 Aug 2026·presentverdict: present · default bool:false
v2.1.23921 Aug 2026·presentverdict: present · default bool:false
v2.1.24022 Aug 2026·presentverdict: present · default bool:false
v2.1.24122 Aug 2026·presentverdict: present · default bool:false
v2.1.24224 Aug 2026·presentverdict: present · default bool:false
v2.1.24324 Aug 2026·presentverdict: present · default bool:false
v2.1.24525 Aug 2026·presentverdict: present · default bool:false
v2.1.24625 Aug 2026·presentverdict: present · default bool:false
v2.1.24726 Aug 2026·presentverdict: present · default bool:false
v2.1.24827 Aug 2026·presentverdict: present · default bool:false
v2.1.25027 Aug 2026·presentverdict: present · default bool:false
v2.1.25128 Aug 2026·presentverdict: present · default bool:false
v2.1.25231 Aug 2026·presentverdict: present · default bool:false
v2.1.2871 Oct 2026·presentverdict: present · default bool:false
v2.1.2882 Oct 2026·presentverdict: present · default bool:false
v2.1.2893 Oct 2026·presentverdict: present · default bool:false
v2.1.2905 Oct 2026·presentverdict: present · default bool:false
v2.1.2916 Oct 2026·presentverdict: present · default bool:false
v2.1.2926 Oct 2026·presentverdict: present · default bool:false
v2.1.2937 Oct 2026·presentverdict: present · default bool:false
v2.1.2948 Oct 2026·presentverdict: present · default bool:false
v2.1.2958 Oct 2026·presentverdict: present · default bool:false
v2.1.2969 Oct 2026·presentverdict: present · default bool:false
v2.1.29914 Oct 2026·presentverdict: present · default bool:false
v2.1.30014 Oct 2026·presentverdict: present · default bool:false
v2.1.30115 Oct 2026·presentverdict: present · default bool:false
v2.1.30216 Oct 2026·presentverdict: present · default bool:false
v2.1.30318 Oct 2026·presentverdict: present · default bool:false
v2.1.30419 Oct 2026·presentverdict: present · default bool:false
v2.1.30520 Oct 2026·presentverdict: present · default bool:false
v2.1.30621 Oct 2026·presentverdict: present · default bool:false
v2.1.30721 Oct 2026·presentverdict: present · default bool:false
v2.1.30822 Oct 2026·presentverdict: present · default bool:false
v2.1.30922 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.
