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Sweep 01 Oct 2026 · 17:27Z Build v2.1.287 508 read Stable v2.1.285 Latest v2.1.287 Next v2.1.287 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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tengu_dapper_platypus

flag in the build JSON

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.286, including the newest one read.

A relay-marked worker whose relay can no longer be used now makes its first command wait for MCP servers like an ordinary worker

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.286.

First seen v2.1.286 30 Sep 2026
Last seen v2.1.287 1 Oct 2026
Builds2 / 130on this box, as of v2.1.287
Written about v2.1.286 first named in a changelog, 30 Sep 2026
v2.1.286in the build not in the build never minedv2.1.287

In the changelogs

2

Releases whose published page names tengu_dapper_platypus.

  1. v2.1.286
    Relay workers wait for MCP servers when their relay is no longer usable

    A relay-marked worker whose relay can no longer be used now makes its first command wait for MCP servers like an ordinary worker

    gate cited by this entry

  2. v2.1.286
    Change to how long some workers wait for MCP servers, behind a switch

    A server-controlled switch changes when relay workers wait for MCP servers before their first command; with it off, nothing changes

    gate cited by this entry

Gate readings

1
ReleaseResolvedThis accountAnonymousCompiled default
v2.1.286 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

2

The earliest release whose published evidence quoted tengu_dapper_platypus was v2.1.286, 30 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.

ReleaseDateThe span that was quoted
v2.1.28630 Sep 2026Va = R("tengu_dapper_platypus", !1),
v2.1.28630 Sep 2026tengu_dapper_platypus

Presence across releases

1
BuildsHow manyDatesReading
v2.1.286 – v2.1.2872 builds30 Sep 2026 → 1 Oct 2026 ◆in the build

Build by build

2

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
v2.1.28630 Sep 2026·addedverdict: added · default bool:false
v2.1.2871 Oct 2026·presentverdict: present · 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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