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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_onyx_sluice

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.228, including the newest one read.

What it is

Artifact comments could be fetched server-side instead of through the frame host, but that switch is off.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.228.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.228 – 2.1.243 15 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
v2.1.242 On for this account, and not off by default on on on
v2.1.236 On for this account, and not off by default on on on
v2.1.228 read on another version On for this account, and not off by default on on 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. v2.1.242Artifact comment reading now sits behind a server-side switch

    Reading artifact comments is now behind a server switch that is off, so nothing is fetched.

    gate cited by this entry

  2. v2.1.236Artifact comments can be read over the control plane before startup

    Artifact comments could be read over the control plane before startup, but the flag falls back to off.

    gate cited by this entry

  3. v2.1.236Early artifact comment read is behind two flags, both off

    The early artifact comment read needs two separate switches, both of which default off.

    gate cited by this entry

  4. v2.1.228Server-side path for reading artifact comments, disabled by default

    Artifact comments could be fetched server-side instead of through the frame host, but that switch is off.

    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_onyx, up to twelve of them.

tengu_onyx_basin_m1kNo description from anybody. never mined tengu_onyx_ploverNo description from anybody. 2.1.138

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.