Source Intelligence
Follow Discord
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_transom

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.219, including the newest one read.

What it is

A per-session workshop document gets snapshotted with your session files and is only writable in plan mode.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.219.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.219 – 2.1.243 24 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
v2.1.219 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.

Changelog entries naming it

  1. v2.1.219Workshop doc: snapshots, plan-mode writes and verified slugs

    A per-session workshop document gets snapshotted with your session files and is only writable in plan mode.

    gate cited by this entry

  2. v2.1.219Plan mode can carry a session workshop document

    Plan mode could offer an interactive published page where your choices feed back into the plan.

    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_plumeA startup tip pointing at a /design command for mocking up UI is present but nobody sees it. 2.1.169 tengu_cedar_sundialNo description from anybody. 2.1.178

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.