tengu_tranquil_cloud
A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.277, including the newest one read.
Claude Code now strips invisible characters like zero-width marks from pasted or typed text before sending it
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.277.
In the changelogs
5Releases whose published page names tengu_tranquil_cloud.
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v2.1.314
Leftover empty entry in a group of remote switches has no effect
A group of remote switches gained an empty leftover entry that adds no switch and changes no behaviour
gate cited by this entry
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v2.1.300
A new remote switch that defaults to on
Claude Code reads a new on/off switch from the server, and treats it as on when the server sends nothing
gate cited by this entry
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v2.1.284
VS Code extension refreshes all its feature switches when policy changes
When the product-feedback policy changes, Claude Code now re-sends every feature switch to the VS Code extension, not just two of them
gate cited by this entry
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v2.1.280
VSCode extension gates: inline pastes and 'tranquil cloud' now on by default; new max-effort reminder gate
VS Code extension adds default-on settings for inline pastes and 'tranquil cloud', plus a new max-effort reminder option
gate cited by this entry, found in this entry's text, named in this entry
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v2.1.277
Invisible/hidden characters stripped from pasted or typed prompt text
Claude Code now strips invisible characters like zero-width marks from pasted or typed text before sending it
gate cited by this entry
Gate readings
5| 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 |
| v2.1.300 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.284 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.280 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.277 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.
First cited
1The earliest release whose published evidence quoted tengu_tranquil_cloud was v2.1.277, 18 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
41One 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.