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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 v2.1.251 Feeds RSS JSON llms.txt
Reading a new release v2.1.251 Analysing changes · 2/5 Deeper second pass · 0/5 agents 427 findings $12.75 so far

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_lantern_sconce

A Claude Code feature flag, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

What it is

A status bar notice about usage limits and covered extra usage is built but switched off.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.247.

Presence across releases

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Gate readings

ReleaseResolvedThis accountAnonymousCompiled default
v2.1.247 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. v2.1.247Usage-limit grace notice, compiled in but off

    A status bar notice about usage limits and covered extra usage is built but switched off.

    named in this entry, 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_lantern, up to twelve of them.

tengu_lantern_prismA Stats tab in /plugin shows skill usage and context costs, with /skill-doctor redirecting there. 2.1.198 tengu_lantern_spoolA server flag can widen when subagent requests send the extended usage-limit header. 2.1.176 tengu_lantern_wickNo description from anybody. 2.1.217 tengu_lantern_wick_modeClaude could be nudged to wrap up or checkpoint during your usage-limit grace window, but nothing fires. 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.