tengu_marble_lark
A Claude Code feature flag, read out of the shipped bundle.
It was in the build from v2.1.147 and was gone by v2.1.210.
Default false. When auto memory is enabled, turns on personal memory sync: the startup sync also pulls and pushes the user memory scope (still subject to the allow_memory_sync policy), and writes into the auto-memory directory are scanned for secrets with the error Memory is synced to your account. When it reads false, an in-flight user scope push stops with personal sync disabled.
Not Anthropic's. Written by Claude Opus 5.5 from reading the v2.1.209 bundle, and it can be wrong.
First seen v2.1.147
Last seen v2.1.209 14 Jul 2026, gone by v2.1.210
Builds53 / 149on this box, as of v2.1.308
Written about — no changelog entry names it
v2.1.147in the build not in the build never minedv2.1.308
In the changelogs
0
No changelog entry here has ever named it. That is a statement about what has been written, not about the name: it has been in the build since v2.1.147 without anybody writing a line about it.
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.
Flag server, over time
12
| Read as | Reading | From | Until | Version installed |
|---|
| anonymous |
off |
2026-10-17T05:30:04Z |
2026-10-22T08:25:04Z |
v2.1.302 to v2.1.308 |
| this account |
off |
2026-09-10T21:47:12Z |
2026-10-22T08:25:04Z |
v2.1.268 to v2.1.308 |
| anonymous |
no longer carried |
2026-10-17T05:25:57Z |
2026-10-17T05:25:57Z |
v2.1.302 |
| anonymous |
off |
2026-08-19T04:25:04Z |
2026-10-17T05:10:04Z |
v2.1.233 to v2.1.302 |
| this account |
no longer carried |
2026-09-10T21:46:45Z |
2026-09-10T21:46:45Z |
v2.1.268 |
| this account |
off |
2026-09-08T20:36:15Z |
2026-09-10T17:40:05Z |
v2.1.263 to v2.1.267 |
| this account |
no longer carried |
2026-09-08T20:34:58Z |
2026-09-08T20:34:58Z |
v2.1.265 |
| this account |
off |
2026-09-06T02:40:05Z |
2026-09-08T18:45:05Z |
v2.1.261 to v2.1.263 |
| this account |
no longer carried |
2026-09-06T02:36:19Z |
2026-09-06T02:36:19Z |
v2.1.263 |
| this account |
off |
2026-08-14T22:10:05Z |
2026-09-06T01:55:04Z |
v2.1.232 to v2.1.261 |
| anonymous |
no longer carried |
2026-08-19T04:20:14Z |
2026-08-19T04:20:14Z |
v2.1.233 |
| anonymous |
off |
2026-08-14T22:10:05Z |
2026-08-19T03:45:04Z |
v2.1.232 to v2.1.233 |
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
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
2
BuildsHow manyDatesReading
v2.1.147 – v2.1.20953 builds → 14 Jul 2026 ◆in the build
v2.1.210 – v2.1.30887 builds14 Jul 2026 → 22 Oct 2026 ○not in the build
Build by build
140
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
v2.1.147·addedverdict: added · default bool:false
v2.1.148·presentverdict: present · default bool:false
v2.1.149·presentverdict: present · default bool:false
v2.1.150·presentverdict: present · default bool:false
v2.1.152·presentverdict: present · default bool:false
v2.1.153·presentverdict: present · default bool:false
v2.1.154·presentverdict: present · default bool:false
v2.1.156·presentverdict: present · default bool:false
v2.1.157·presentverdict: present · default bool:false
v2.1.158·presentverdict: present · default bool:false
v2.1.159·presentverdict: present · default bool:false
v2.1.160·presentverdict: present · default bool:false
v2.1.161·presentverdict: present · default bool:false
v2.1.162·presentverdict: present · default bool:false
v2.1.1634 Jun 2026·presentverdict: present · default bool:false
v2.1.1655 Jun 2026·presentverdict: present · default bool:false
v2.1.1665 Jun 2026·presentverdict: present · default bool:false
v2.1.1676 Jun 2026·presentverdict: present · default bool:false
v2.1.1686 Jun 2026·presentverdict: present · default bool:false
v2.1.1698 Jun 2026·presentverdict: present · default bool:false
v2.1.1709 Jun 2026·presentverdict: present · default bool:false
v2.1.17210 Jun 2026·presentverdict: present · default bool:false
v2.1.17311 Jun 2026·presentverdict: present · default bool:false
v2.1.17411 Jun 2026·presentverdict: present · default bool:false
v2.1.17512 Jun 2026·presentverdict: present · default bool:false
v2.1.17612 Jun 2026·presentverdict: present · default bool:false
v2.1.17713 Jun 2026·presentverdict: present · default bool:false
v2.1.17815 Jun 2026·presentverdict: present · default bool:false
v2.1.17916 Jun 2026·presentverdict: present · default bool:false
v2.1.18117 Jun 2026·presentverdict: present · default bool:false
v2.1.18218 Jun 2026·presentverdict: present · default bool:false
v2.1.18319 Jun 2026·presentverdict: present · default bool:false
v2.1.18520 Jun 2026·presentverdict: present · default bool:false
v2.1.18622 Jun 2026·presentverdict: present · default bool:false
v2.1.18723 Jun 2026·presentverdict: present · default bool:false
v2.1.19024 Jun 2026·presentverdict: present · default bool:false
v2.1.19124 Jun 2026·presentverdict: present · default bool:false
v2.1.19325 Jun 2026·presentverdict: present · default bool:false
v2.1.19526 Jun 2026·presentverdict: present · default bool:false
v2.1.19629 Jun 2026·presentverdict: present · default bool:false
v2.1.19730 Jun 2026·presentverdict: present · default bool:false
v2.1.1981 Jul 2026·presentverdict: present · default bool:false
v2.1.1992 Jul 2026·presentverdict: present · default bool:false
v2.1.2003 Jul 2026·presentverdict: present · default bool:false
v2.1.2013 Jul 2026·presentverdict: present · default bool:false
v2.1.2026 Jul 2026·presentverdict: present · default bool:false
v2.1.2037 Jul 2026·presentverdict: present · default bool:false
v2.1.2048 Jul 2026·presentverdict: present · default bool:false
v2.1.2058 Jul 2026·presentverdict: present · default bool:false
v2.1.2069 Jul 2026·presentverdict: present · default bool:false
v2.1.20710 Jul 2026·presentverdict: present · default bool:false
v2.1.20813 Jul 2026·presentverdict: present · default bool:false
v2.1.20914 Jul 2026·presentverdict: present · default bool:false
v2.1.21014 Jul 2026·removedverdict: removed
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.
