tengu_brass_lantern
A Claude Code feature flag, read out of the shipped bundle. It was in the build from v2.1.271 and was gone by v2.1.290.
New startup telemetry tracks managed-config readiness and an optional live identity check
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.269.
In the changelogs
1Releases whose published page names tengu_brass_lantern.
-
v2.1.269
New telemetry: tengu_managed_config_ready and live-identity cross-check, gated by tengu_brass_lantern
New startup telemetry tracks managed-config readiness and an optional live identity check
gate cited by this entry, found in this entry's text
Gate readings
0No 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
0No 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
6Build by build
47One 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.
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.