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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.257 ·

Server-assisted tool token counting cache for context analysis, still gated off by default

Tool token counts for context analysis can come from the server instead of local estimates, but the gate is off.

TierNothing to try yethow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaContext Usagewhat it touches
KindIn Developmentin v2.1.257,
Nothing to try yet Notable No documentation found

Tool token counts for context analysis can come from the server instead of local estimates, but the gate is off.

A new run-deduped cache plus a server-backed tool-count path can replace local estimation of tool definition token counts when analyzing context usage, falling back to the previous local estimator on error or when the tengu_peppy_zephyr gate is off. The feature is still gated off by default.

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Feature flag
tengu_peppy_zephyr Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.257: off

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 v2.1.257. It isn't a statement about your account. What a flag value here can and cannot tell you

How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: tengu_peppy_zephyr

See this entry in the whole of v2.1.257 →

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