tengu_iridescent_pascal
A Claude Code feature flag, read out of the shipped bundle. It was in the build from v2.1.280 and was gone by v2.1.292.
New gated flag tengu_iridescent_pascal can skip redundant permission-context resets
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.280.
In the changelogs
3Releases whose published page names tengu_iridescent_pascal.
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v2.1.292
Skill permission reset now applies only to remote cowork sessions
The permission reset when a skill runs no longer has a server switch and now depends only on the session being a remote cowork one
gate cited by this entry
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v2.1.290
Skill permission reset is no longer controlled only by its server switch
The reset of permission settings when a skill runs can now be triggered by a separate check as well as by its server-controlled switch
gate cited by this entry
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v2.1.280
New gated flag 'tengu_iridescent_pascal' controls skill/tool permission-context resets
New gated flag tengu_iridescent_pascal can skip redundant permission-context resets
gate cited by this entry, found in this entry's text, named in this entry
Gate readings
3| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.292 read on another version | Off in both readings | off | off | not a boolean we can read |
| v2.1.290 read on another version | Off in both readings | off | off | off |
| v2.1.280 read on another version | Not enough to say | no value returned | no value returned | off |
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
12| Read as | Reading | From | Until | Version installed |
|---|---|---|---|---|
| this account | no longer carried | 2026-11-03T01:30:06Z | 2026-11-03T01:30:06Z | v2.1.316 |
| this account | off | 2026-11-03T00:30:08Z | 2026-11-03T01:05:04Z | v2.1.316 |
| this account | no longer carried | 2026-11-03T00:25:17Z | 2026-11-03T00:25:17Z | v2.1.317 |
| this account | off | 2026-09-29T03:25:04Z | 2026-11-02T22:50:05Z | v2.1.284 to v2.1.316 |
| anonymous | no longer carried | 2026-11-02T21:30:06Z | 2026-11-02T21:30:06Z | v2.1.316 |
| anonymous | off | 2026-10-17T05:30:04Z | 2026-11-02T21:10:06Z | v2.1.302 to v2.1.316 |
| anonymous | no longer carried | 2026-10-17T05:25:57Z | 2026-10-17T05:25:57Z | v2.1.302 |
| anonymous | off | 2026-09-29T03:10:05Z | 2026-10-17T05:10:04Z | v2.1.284 to v2.1.302 |
| this account | no longer carried | 2026-09-23T15:25:04Z | 2026-09-23T15:25:04Z | v2.1.280 |
| anonymous | no longer carried | 2026-09-23T15:20:04Z | 2026-09-23T15:20:04Z | v2.1.280 |
| this account | off | 2026-09-23T04:15:05Z | 2026-09-23T15:20:04Z | v2.1.280 |
| anonymous | off | 2026-09-23T04:15:05Z | 2026-09-23T15:10:04Z | v2.1.280 |
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
3The earliest release whose published evidence quoted tengu_iridescent_pascal was v2.1.280, 22 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
2Build by build
39One 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.