tengu_wild_hamster
A Claude Code feature flag, read out of the shipped bundle. It was in the build from v2.1.314 and was gone by v2.1.319.
In hosted worker sessions only, Claude Code now reports how many uploaded and attached files exist, their sizes, and whether they were read
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.314.
In the changelogs
1Releases whose published page names tengu_wild_hamster.
-
v2.1.314
Hosted workers now report counts of uploaded and attached files
In hosted worker sessions only, Claude Code now reports how many uploaded and attached files exist, their sizes, and whether they were read
gate cited by this entry
Gate readings
1| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.314 read on another version | Not enough to say | no value returned | no value returned | on |
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.
Flag server, over time
4| Read as | Reading | From | Until | Version installed |
|---|---|---|---|---|
| this account | off | 2026-11-04T17:10:05Z | 2026-11-06T13:45:04Z | v2.1.318 |
| anonymous | off | 2026-11-04T16:25:04Z | 2026-11-06T13:45:04Z | v2.1.318 |
| this account | on | 2026-10-30T14:25:04Z | 2026-11-04T16:30:05Z | v2.1.314 to v2.1.318 |
| anonymous | on | 2026-10-30T13:45:05Z | 2026-11-04T15:40:04Z | v2.1.314 to v2.1.318 |
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
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
2Build by build
6One 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.