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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 v2.1.260 ·

New thinking-block-stripping decision during manual compaction, behind an unlaunched flag

Manual compaction now decides whether to strip thinking blocks, gated for adaptive thinking only.

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaCompactionwhat it touches
KindIn Developmentin v2.1.260,
Under the hood Nothing to try yet

Manual compaction now decides whether to strip thinking blocks, gated for adaptive thinking only.

A new function decides whether to strip thinking blocks from the kept tail of a compacted conversation during manual compaction, and is now actively called, logging a line noting what the kept tail holds. The decision depends on the model's resolved thinking type: only when that type is "adaptive" does it consult a feature flag, otherwise stripping stays hardcoded off.

Read from
Feature flag
tengu_wise_comet 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 v2.1.260: no gate table built for this version

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 v2.1.260. It isn't a statement about your account. What a flag value here can and cannot tell you

What has happened since
Flag reading moved The flag server now returns off for tengu_wise_comet, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

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_wise_comet

See this entry in the whole of v2.1.260 →

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