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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_pr_footer_surface_suffix

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.211, including the newest one read.

What it is

Nobody has written a line about this one. It is not in any of Anthropic's reference tables and no changelog entry here carries a description of it. It is in the build, which is the whole of what this page can claim.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.211 – 2.1.243 32 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
v2.1.211 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. v2.1.211PR Footer Optionally Shows Launch Surface

    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_pr, up to twelve of them.

tengu_pr_prep_suggestion_renderedBefore committing, Claude can be made to state which verify, simplify and code-review skills it ran. never mined tengu_pr_status_cliNo description from anybody. never mined tengu_pr_writing_guidance_renderedPlain-language PR writing rules and repo PR template fetching exist but reach no prompt. never mined tengu_precompute_compaction_setting_changedNo description from anybody. never mined tengu_prompt_cache_1h_configWhether a one-hour prompt cache is allowed can now be overridden per agent and can ignore overage. 2.1.138 tengu_prompt_cache_breakCache diagnostics know when the baseline came from disk and skip misleading difference reports. never mined tengu_prompt_cache_diagnosis_receivedMCP server error lines are escaped before display, plus minor telemetry and version-string cleanups. never mined tengu_prompt_cache_diagnosticsCache diagnostics know when the baseline came from disk and skip misleading difference reports. 2.1.138 tengu_prompt_suggestion_acceptedNo description from anybody. never mined tengu_prompt_suggestion_shownNo description from anybody. never mined tengu_propose_goalA tool letting Claude propose a session goal you approve with one keypress is present but gated off. 2.1.227 tengu_propose_skillsAn env var turns on the tool that proposes new skills; otherwise it stays off in this build. 2.1.212

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.