tengu_steadfast_wren
A Claude Code feature flag, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
Claude Code adds several new remotely controlled switches whose purpose is not yet visible
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.299.
In the changelogs
1Releases whose published page names tengu_steadfast_wren.
-
v2.1.299
New remotely controlled switches added with no visible effect yet
Claude Code adds several new remotely controlled switches whose purpose is not yet visible
gate cited by this entry
Gate readings
1| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.299 read on another version | Not enough to say | no value returned | off | not a boolean we can read |
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
9| Read as | Reading | From | Until | Version installed |
|---|---|---|---|---|
| anonymous | off | 2026-10-17T05:30:04Z | 2026-10-22T09:55:05Z | v2.1.302 to v2.1.308 |
| anonymous | no longer carried | 2026-10-17T05:25:57Z | 2026-10-17T05:25:57Z | v2.1.302 |
| anonymous | off | 2026-10-13T06:50:05Z | 2026-10-17T05:10:04Z | v2.1.296 to v2.1.302 |
| this account | no longer carried | 2026-10-14T04:35:04Z | 2026-10-14T04:35:04Z | v2.1.299 |
| this account | off | 2026-10-14T04:15:03Z | 2026-10-14T04:15:03Z | v2.1.299 |
| this account | no longer carried | 2026-10-14T02:55:04Z | 2026-10-14T02:55:04Z | v2.1.299 |
| this account | off | 2026-10-14T00:50:06Z | 2026-10-14T00:50:06Z | v2.1.296 |
| this account | no longer carried | 2026-10-14T00:45:24Z | 2026-10-14T00:45:24Z | v2.1.299 |
| this account | off | 2026-10-13T09:35:04Z | 2026-10-13T23:55:04Z | v2.1.296 |
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
0The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
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.