A Claude Code feature flag, read out of the shipped bundle.
It has been in the build since v2.1.138, including the newest one read.
Default null. Configures auto dream memory consolidation: enabled: true turns it on when the autoDreamEnabled setting is unset, enabled or available being true makes the feature available, and minHours (default 24) and minSessions (default 5) set how long and how many sessions must pass since the last consolidation before another runs. Non-positive or non-numeric values use the defaults.
Not Anthropic's. Written by Claude Opus 5.5 from reading the v2.1.286 bundle, and it can be wrong.
First seen v2.1.138 9 May 2026
Last seen v2.1.309 22 Oct 2026
Builds150 / 150on this box, as of v2.1.309
Written about v2.1.78 first named in a changelog, 17 Mar 2026
v2.1.138in the build not in the build never minedv2.1.309
In the changelogs
3
Releases whose published page names tengu_onyx_plover.
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.
One row per unbroken stretch of one reading, newest first, from snapshots taken every twenty-five minutes or so. No longer carried is not off: it means the flag server stopped returning the gate at all, which is what a retired experiment looks like. The version column is what was installed when the reading was taken, not what caused it.
First cited
1
The earliest release whose published evidence quoted tengu_onyx_plover was v2.1.78, 17 Mar 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.
v2.1.138 – v2.1.309150 builds9 May 2026 → 22 Oct 2026 ◆in the build
Build by build
150
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
v2.1.1389 May 2026·presentverdict: present · default null
v2.1.13911 May 2026·presentverdict: present · default null
v2.1.14012 May 2026·presentverdict: present · default null
v2.1.2871 Oct 2026·presentverdict: present · default null
v2.1.2882 Oct 2026·presentverdict: present · default null
v2.1.2893 Oct 2026·presentverdict: present · default null
v2.1.2905 Oct 2026·presentverdict: present · default null
v2.1.2916 Oct 2026·presentverdict: present · default null
v2.1.2926 Oct 2026·presentverdict: present · default null
v2.1.2937 Oct 2026·presentverdict: present · default null
v2.1.2948 Oct 2026·presentverdict: present · default null
v2.1.2958 Oct 2026·presentverdict: present · default null
v2.1.2969 Oct 2026·presentverdict: present · default null
v2.1.29914 Oct 2026·presentverdict: present · default null
v2.1.30014 Oct 2026·presentverdict: present · default null
v2.1.30115 Oct 2026·presentverdict: present · default null
v2.1.30216 Oct 2026·presentverdict: present · default null
v2.1.30318 Oct 2026·presentverdict: present · default null
v2.1.30419 Oct 2026·presentverdict: present · default null
v2.1.30520 Oct 2026·presentverdict: present · default null
v2.1.30621 Oct 2026·presentverdict: present · default null
v2.1.30721 Oct 2026·presentverdict: present · default null
v2.1.30822 Oct 2026·presentverdict: present · default null
v2.1.30922 Oct 2026·presentverdict: present · default null
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.
