tengu_drifting_reef
A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.284, including the newest one read.
A new switch, off by default, makes computer-use actions in auto mode go through further permission checks even when an allow rule covers the whole tool
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.284.
In the changelogs
3Releases whose published page names tengu_drifting_reef.
-
v2.1.284
Allow rules may stop auto-approving computer-use clicks and typing in auto mode
A new switch, off by default, makes computer-use actions in auto mode go through further permission checks even when an allow rule covers the whole tool
gate cited by this entry
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v2.1.284
Browser and computer-use actions can carry a short summary of their effect
Browser and desktop control tools can ask Claude for a few words on what each action does, off unless switched on remotely
gate cited by this entry
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v2.1.284
Chrome browser tools can ask Claude to summarise each action
Claude Code's Chrome tools can ask Claude for a few words describing each click, keypress, typing or form fill, off unless switched on remotely
gate cited by this entry
Gate readings
1| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.284 read on another version | Not enough to say | no value returned | no value returned | 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
8| Read as | Reading | From | Until | Version installed |
|---|---|---|---|---|
| anonymous | {"browserClicks":true,"browserSummary":true,"computerUseChecks":true,"computerUseSummary":true} | 2026-10-17T05:30:04Z | 2026-11-13T02:10:04Z | v2.1.302 to v2.1.323 |
| this account | {"browserClicks":true,"browserSummary":true,"computerUseChecks":true,"computerUseSummary":true} | 2026-10-01T18:20:06Z | 2026-11-13T02:10:04Z | v2.1.287 to v2.1.323 |
| anonymous | no longer carried | 2026-10-17T05:25:57Z | 2026-10-17T05:25:57Z | v2.1.302 |
| anonymous | {"browserClicks":true,"browserSummary":true,"computerUseChecks":true,"computerUseSummary":true} | 2026-10-15T12:50:05Z | 2026-10-17T05:10:04Z | v2.1.300 to v2.1.302 |
| anonymous | [] | 2026-09-25T22:35:04Z | 2026-10-15T12:25:04Z | v2.1.283 to v2.1.300 |
| this account | [] | 2026-10-01T17:25:05Z | 2026-10-01T18:10:08Z | v2.1.286 |
| this account | {"browserClicks":true,"browserSummary":true,"computerUseChecks":true,"computerUseSummary":true} | 2026-10-01T17:20:31Z | 2026-10-01T17:20:31Z | v2.1.287 |
| this account | [] | 2026-09-25T22:40:04Z | 2026-10-01T16:30:06Z | v2.1.283 to v2.1.286 |
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
1The earliest release whose published evidence quoted tengu_drifting_reef was v2.1.284, 28 Sep 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.
Presence across releases
3Build by build
36One 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.