tengu_eager_pillow
A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.274, including the newest one read.
A gated code path changes how Claude Code detects unresolved tool uses
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.274.
In the changelogs
5Releases whose published page names tengu_eager_pillow.
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v2.1.312
Resuming an interrupted turn re-runs waiting agent calls instead of the whole turn
After a restart, agent calls left waiting in an interrupted turn are run again so each picks up its agent, rather than redoing the whole turn
gate cited by this entry
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v2.1.311
Denying a parked permission prompt is now treated as a refusal
In one mode, Deny on a parked permission prompt in a remote session is now a refusal that holds, and later answers for that action are dropped
gate cited by this entry
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v2.1.292
Resuming an interrupted turn recovers tool calls the previous worker already handled
With CLAUDE_CODE_RESUME_INTERRUPTED_TURN set, resume now finds tool calls the previous worker recorded but the transcript left unfinished
gate cited by this entry
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v2.1.288
Remote switches now control two subagent and tool-result behaviours
Two remote switches, off by default, control keeping a file-sending tool's results in subagents and how unanswered tool requests are found
gate cited by this entry, found in this entry's text
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v2.1.274
Gated: eager unresolved-tool-use detection path (tengu_eager_pillow)
A gated code path changes how Claude Code detects unresolved tool uses
named in this entry, gate cited by this entry, found in this entry's text
Gate readings
5| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.312 read on another version | Off by default, switched on for this account | on | on | off |
| v2.1.311 read on another version | Off by default, switched on for this account | on | on | off |
| v2.1.292 read on another version | Off by default, switched on for this account | on | on | off |
| v2.1.288 read on another version | Off by default, switched on for this account | on | on | off |
| v2.1.274 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
6| Read as | Reading | From | Until | Version installed |
|---|---|---|---|---|
| anonymous | on | 2026-10-17T05:30:04Z | 2026-11-06T10:30:06Z | v2.1.302 to v2.1.318 |
| this account | on | 2026-09-18T22:05:04Z | 2026-11-06T10:30:06Z | v2.1.277 to v2.1.318 |
| anonymous | no longer carried | 2026-10-17T05:25:57Z | 2026-10-17T05:25:57Z | v2.1.302 |
| anonymous | on | 2026-09-18T21:00:06Z | 2026-10-17T05:10:04Z | v2.1.277 to v2.1.302 |
| this account | off | 2026-09-17T19:35:04Z | 2026-09-18T21:00:06Z | v2.1.274 to v2.1.277 |
| anonymous | off | 2026-09-17T19:30:05Z | 2026-09-18T20:45:04Z | v2.1.274 to v2.1.277 |
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_eager_pillow was v2.1.274, 16 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
1Build by build
42One 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.