Source Intelligence

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.

All of v2.1.217 Home All releases olderv2.1.216 v2.1.218newer
Claude Code v2.1.217

rateLimitGraceActive Session State Field [In Development]

Feature flag
tengu_lantern_spool Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.217: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.217. It isn't a statement about your account. What a flag value here can and cannot tell you

What

A new rateLimitGraceActive boolean field has been added to the session state schema (marked @internal). It tracks whether the account is currently in the usage-limit grace zone, as observed from extended-request response headers. The field is described as observation-lagged — it stays latched when extended requests stop and should be expired via resetsAt rather than waiting for a clearing event.

Status

Infrastructure added; the header parsing and state tracking are live (see rate limit grace window under New Features), but rateLimitGraceActive as a schema field is documented as internal.

Evidence

Schema field (search for "rateLimitGraceActive" or "tengu_lantern_spool")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.217 →