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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.301 ·

New remotely controlled switch for a shorter prompt variant

Claude Code has a new check for a slimmed-down prompt variant, off unless it is switched on remotely

Nothing to try yet In Development
JSON All of v2.1.301
Nothing to try yetTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
System PromptArea: what it touches
In DevelopmentKind: in v2.1.301,
In DevelopmentSection of the release

Unclear What the temporal_hare feature changes is not shown.

What

Claude Code has a new check for a feature called "temporal_hare". It is off unless it is switched on remotely, and it also needs the lean prompt setting (a shorter version of Claude's instructions) to be on.

Why

If this is switched on for an account, the instructions Claude receives may change.

Read from
Feature flag
tengu_temporal_hare 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 v2.1.301: 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 v2.1.301. It isn't a statement about your account. What a flag value here can and cannot tell you

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat the temporal_hare feature changes is not shown.
The name it cites is new in this buildNew in this build: tengu_temporal_hare

See this entry in the whole of v2.1.301 →

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