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_bg_prewarm_per_sweep was v2.1.248, 27 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.
v2.1.163 – v2.1.308126 builds4 Jun 2026 → 22 Oct 2026 ◆in the build
Build by build
126
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
v2.1.1634 Jun 2026·addedverdict: added · default number
v2.1.1655 Jun 2026·presentverdict: present · default number
v2.1.1665 Jun 2026·presentverdict: present · default number
v2.1.1676 Jun 2026·presentverdict: present · default number
v2.1.1686 Jun 2026·presentverdict: present · default number
v2.1.1698 Jun 2026·presentverdict: present · default number
v2.1.1709 Jun 2026·presentverdict: present · default number
v2.1.17210 Jun 2026·presentverdict: present · default number
v2.1.17311 Jun 2026·presentverdict: present · default number
v2.1.17411 Jun 2026·presentverdict: present · default number
v2.1.17512 Jun 2026·presentverdict: present · default number
v2.1.17612 Jun 2026·presentverdict: present · default number
v2.1.17713 Jun 2026·presentverdict: present · default number
v2.1.17815 Jun 2026·presentverdict: present · default number
v2.1.17916 Jun 2026·presentverdict: present · default number
v2.1.18117 Jun 2026·presentverdict: present · default number
v2.1.18218 Jun 2026·presentverdict: present · default number
v2.1.18319 Jun 2026·presentverdict: present · default number
v2.1.18520 Jun 2026·presentverdict: present · default number
v2.1.18622 Jun 2026·presentverdict: present · default number
v2.1.18723 Jun 2026·presentverdict: present · default number
v2.1.19024 Jun 2026·presentverdict: present · default number
v2.1.19124 Jun 2026·presentverdict: present · default number
v2.1.19325 Jun 2026·presentverdict: present · default number
v2.1.19526 Jun 2026·presentverdict: present · default number
v2.1.19629 Jun 2026·presentverdict: present · default number
v2.1.19730 Jun 2026·presentverdict: present · default number
v2.1.1981 Jul 2026·presentverdict: present · default number
v2.1.1992 Jul 2026·presentverdict: present · default number
v2.1.2003 Jul 2026·presentverdict: present · default number
v2.1.2013 Jul 2026·presentverdict: present · default number
v2.1.2026 Jul 2026·presentverdict: present · default number
v2.1.2037 Jul 2026·presentverdict: present · default number
v2.1.2048 Jul 2026·presentverdict: present · default number
v2.1.2058 Jul 2026·presentverdict: present · default number
v2.1.2069 Jul 2026·presentverdict: present · default number
v2.1.20710 Jul 2026·presentverdict: present · default number
v2.1.20813 Jul 2026·presentverdict: present · default number
v2.1.20914 Jul 2026·presentverdict: present · default number
v2.1.21014 Jul 2026·presentverdict: present · default number
v2.1.21115 Jul 2026·presentverdict: present · default number
v2.1.21216 Jul 2026·presentverdict: present · default number
v2.1.21317 Jul 2026·presentverdict: present · default number
v2.1.21418 Jul 2026·presentverdict: present · default number
v2.1.21519 Jul 2026·presentverdict: present · default number
v2.1.21620 Jul 2026·presentverdict: present · default number
v2.1.21721 Jul 2026·presentverdict: present · default number
v2.1.21822 Jul 2026·presentverdict: present · default number
v2.1.21924 Jul 2026·presentverdict: present · default number
v2.1.22024 Jul 2026·presentverdict: present · default number
v2.1.2213 Aug 2026·presentverdict: present · default number
v2.1.2224 Aug 2026·presentverdict: present · default number
v2.1.2235 Aug 2026·presentverdict: present · default number
v2.1.2247 Aug 2026·presentverdict: present · default number
v2.1.2257 Aug 2026·presentverdict: present · default number
v2.1.2268 Aug 2026·presentverdict: present · default number
v2.1.22710 Aug 2026·presentverdict: present · default number
v2.1.22811 Aug 2026·presentverdict: present · default number
v2.1.22912 Aug 2026·presentverdict: present · default number
v2.1.23113 Aug 2026·presentverdict: present · default number
v2.1.23213 Aug 2026·presentverdict: present · default number
v2.1.23314 Aug 2026·presentverdict: present · default number
v2.1.23417 Aug 2026·presentverdict: present · default number
v2.1.23518 Aug 2026·presentverdict: present · default number
v2.1.23619 Aug 2026·presentverdict: present · default number
v2.1.23719 Aug 2026·presentverdict: present · default number
v2.1.23820 Aug 2026·presentverdict: present · default number
v2.1.23921 Aug 2026·presentverdict: present · default number
v2.1.24022 Aug 2026·presentverdict: present · default number
v2.1.24122 Aug 2026·presentverdict: present · default number
v2.1.24224 Aug 2026·presentverdict: present · default number
v2.1.24324 Aug 2026·presentverdict: present · default number
v2.1.24525 Aug 2026·presentverdict: present · default number
v2.1.24625 Aug 2026·presentverdict: present · default number
v2.1.24726 Aug 2026·presentverdict: present · default number
v2.1.24827 Aug 2026·presentverdict: present · default number
v2.1.25027 Aug 2026·presentverdict: present · default number
v2.1.25128 Aug 2026·presentverdict: present · default number
v2.1.25231 Aug 2026·presentverdict: present · default number
v2.1.2571 Sep 2026·presentverdict: present · default number
v2.1.2581 Sep 2026·presentverdict: present · default number
v2.1.2592 Sep 2026·presentverdict: present · default number
v2.1.2603 Sep 2026·presentverdict: present · default number
v2.1.2614 Sep 2026·presentverdict: present · default number
v2.1.2636 Sep 2026·presentverdict: present · default number
v2.1.2658 Sep 2026·presentverdict: present · default number
v2.1.2668 Sep 2026·presentverdict: present · default number
v2.1.2679 Sep 2026·presentverdict: present · default number
v2.1.26810 Sep 2026·presentverdict: present · default number
v2.1.26911 Sep 2026·presentverdict: present · default number
v2.1.27012 Sep 2026·presentverdict: present · default number
v2.1.27114 Sep 2026·presentverdict: present · default number
v2.1.27214 Sep 2026·presentverdict: present · default number
v2.1.27315 Sep 2026·presentverdict: present · default number
v2.1.27416 Sep 2026·presentverdict: present · default number
v2.1.27517 Sep 2026·presentverdict: present · default number
v2.1.27618 Sep 2026·presentverdict: present · default number
v2.1.27718 Sep 2026·presentverdict: present · default number
v2.1.27819 Sep 2026·presentverdict: present · default number
v2.1.28022 Sep 2026·presentverdict: present · default number
v2.1.28123 Sep 2026·presentverdict: present · default number
v2.1.28224 Sep 2026·presentverdict: present · default number
v2.1.28325 Sep 2026·presentverdict: present · default number
v2.1.28428 Sep 2026·presentverdict: present · default number
v2.1.28529 Sep 2026·presentverdict: present · default number
v2.1.28630 Sep 2026·presentverdict: present · default number
v2.1.2871 Oct 2026·presentverdict: present · default number
v2.1.2882 Oct 2026·presentverdict: present · default number
v2.1.2893 Oct 2026·presentverdict: present · default number
v2.1.2905 Oct 2026·presentverdict: present · default number
v2.1.2916 Oct 2026·presentverdict: present · default number
v2.1.2926 Oct 2026·presentverdict: present · default number
v2.1.2937 Oct 2026·presentverdict: present · default number
v2.1.2948 Oct 2026·presentverdict: present · default number
v2.1.2958 Oct 2026·presentverdict: present · default number
v2.1.2969 Oct 2026·presentverdict: present · default number
v2.1.29914 Oct 2026·presentverdict: present · default number
v2.1.30014 Oct 2026·presentverdict: present · default number
v2.1.30115 Oct 2026·presentverdict: present · default number
v2.1.30216 Oct 2026·presentverdict: present · default number
v2.1.30318 Oct 2026·presentverdict: present · default number
v2.1.30419 Oct 2026·presentverdict: present · default number
v2.1.30520 Oct 2026·presentverdict: present · default number
v2.1.30621 Oct 2026·presentverdict: present · default number
v2.1.30721 Oct 2026·presentverdict: present · default number
v2.1.30822 Oct 2026·presentverdict: present · 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.
