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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_marble_heron

A Claude Code feature flag, read out of the shipped bundle. It was in the build from v2.1.234 and was gone by v2.1.242.

What it is

Your session can now wait out a usage limit and pick the task back up by itself.

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 — —
2.1.242 – 2.1.243 2 releases not in the build — —
2.1.234 – 2.1.241 8 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

No release here has a gate table behind it for this flag. Most published releases have none at all: the readings exist only for versions the pipeline captured flag state on.

Changelog entries naming it

  1. v2.1.234Sessions can wait out a claude.ai usage limit and continue on their own

    Your session can now wait out a usage limit and pick the task back up by itself.

    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_marble, up to twelve of them.

tengu_marble_larkNo description from anybody. 2.1.147 tengu_marble_whisperNo description from anybody. never mined tengu_marbled_tealEffort levels can be labelled with relative cost like ~2x, hidden behind an off gate. 2.1.224

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.