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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial

tengu_proud_clover

flag in the build JSON

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.280, including the newest one read.

A new "max effort" mode appears with a footer hint pointing to the /effort command

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.280.

First seen v2.1.280 22 Sep 2026
Last seen v2.1.280 22 Sep 2026
Builds1 / 123on this box, as of v2.1.280
Written about v2.1.280 first named in a changelog, 22 Sep 2026
v2.1.280in the build not in the build never minedv2.1.280

In the changelogs

4

Releases whose published page names tengu_proud_clover.

  1. v2.1.280
    New "max effort" mode with /effort command

    A new "max effort" mode appears with a footer hint pointing to the /effort command

    gate cited by this entry

  2. 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

  3. v2.1.280
    Max-effort reminder UI, gated off by default

    A new reminder can appear in the status line when effort is set to max, pointing you to /effort to change it

    gate cited by this entry

  4. v2.1.280
    Max-effort reminder now shown as a warning when a CLI env var/flag is set

    Max-effort reminder in the model panel turns into a warning-colored message when a specific env var or flag is set

    gate cited by this entry

Gate readings

1
ReleaseResolvedThis accountAnonymousCompiled default
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.

First cited

0

No 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

1
BuildsHow manyDatesReading
v2.1.2801 build22 Sep 2026 in the build

Build by build

1

One 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.

BuildDateStateThe record behind it
v2.1.28022 Sep 2026·addedverdict: added · default bool:false

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.

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