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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_saffron_wren

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.234, including the newest one read.

What it is

Goals now nudge Claude every 30 minutes when background shells or agents are blocking evaluation.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.234.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.234 – 2.1.243 10 releases in the build — bool:true

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 Off by default, switched on for this account on on off
v2.1.234 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.

Changelog entries naming it

  1. v2.1.242Goal check-ins now quote the goal

    Goal check-ins quote your goal, and you can change how often they run with an environment variable.

    gate cited by this entry

  2. v2.1.234Goals nudge themselves when background work is blocking them

    Goals now nudge Claude every 30 minutes when background shells or agents are blocking evaluation.

    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_saffron, up to twelve of them.

tengu_saffron_anchorA prompt-and-context experiment switch was renamed and four other switches disappeared entirely. 2.1.179 tengu_saffron_credits_only_tiersNo description from anybody. 2.1.190 tengu_saffron_ladderNo description from anybody. 2.1.216 tengu_saffron_latticeNo description from anybody. 2.1.170 tengu_saffron_picker_dimNo description from anybody. 2.1.190

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.