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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Reference / Feature flags

tengu_cedar_plume

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.169, including the newest one read.

What it is

A startup tip pointing at a /design command for mocking up UI is present but nobody sees it.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.236.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.169 – 2.1.243 67 releases in the build — bool:false

A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.

Gate readings

ReleaseResolvedThis accountAnonymousCompiled default
v2.1.236 Off in both readings off off on
v2.1.169 read on another version Off in both readings off off 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.

Changelog entries naming it

  1. v2.1.236A startup tip pointing at /design for UI work

    A startup tip pointing at a /design command for mocking up UI is present but nobody sees it.

    gate cited by this entry

  2. v2.1.169Claude Design Contextual Tip [In Development]

    gate cited by this entry

Documentation pages

None of Anthropic's documentation pages this site has a copy of carries this name.

Names beside it

Every feature flag in the inventory starting tengu_cedar, up to twelve of them.

tengu_cedar_hollow_7mNo description from anybody. 2.1.154 tengu_cedar_inletNo description from anybody. 2.1.138 tengu_cedar_lanternThree existing feature gates moved position; their defaults are unchanged. 2.1.162 tengu_cedar_latticeNo description from anybody. 2.1.182 tengu_cedar_marshNo description from anybody. 2.1.157 tengu_cedar_sundialNo description from anybody. 2.1.178 tengu_cedar_transomA per-session workshop document gets snapshotted with your session files and is only writable in plan mode. 2.1.219

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.