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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_sorrel_avocet

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

Claude could start deep research on its own instead of waiting for you to ask, if enabled.

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 — unknown

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 Off in both readings off off not a boolean we can read

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. v2.1.219Bundled workflows can gate model invocation at runtime; deep-research wired to a new flag

    Claude could start deep research on its own instead of waiting for you to ask, if enabled.

    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_sorrel, up to twelve of them.

tengu_sorrel_trellisClaude can watch artifact comment threads and post replies or edits, off unless you set the env var. 2.1.221 tengu_sorrel_trellis_finialArtifact comment replies get grouped wakes and a stand-down when everything was already answered, both switched off. never mined tengu_sorrel_trellis_lintelA comment sent moments before a watch starts could get a reply, but the flag is off. 2.1.236 tengu_sorrel_trellis_weirHow many turns Claude takes automatically can now be set from the server, still defaulting to 60. 2.1.227

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.