Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.269 ·

New thinking-block hint text behind two dark-launch gates

A new 'summary' hint for thinking blocks exists in the code but is gated off for now

TierNothing to try yethow much it should matter to you
Useful2my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaElsewherewhat it touches
KindIn Developmentin v2.1.269,
Nothing to try yet No documentation found

A new 'summary' hint for thinking blocks exists in the code but is gated off for now

What

Claude Code shows a small hint next to collapsed 'thinking' blocks (the sections where Claude's reasoning is shown). The code now supports three outcomes for that hint: the existing 'summarized' hint in a dim tone, a new 'summary' hint in a subtler tone, or no hint at all, with the choice controlled by two feature gates, tengu_lilac_dune and tengu_quizzical_shore.

Why

This adds a new possible label for thinking-block hints, but it is not yet active for readers of this site: no reading has been taken under this release for either gate, and both were previously off for this site's account and for the anonymous baseline.

Read from
Feature flag
tengu_lilac_dune 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 v2.1.269: off

tengu_quizzical_shore 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 v2.1.269: off

Read once, for one account on one subscription tier, against v2.1.269. 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_lilac_dune

See this entry in the whole of v2.1.269 →