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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Idle-session cache stop policy runs in shadow mode

Logic measuring how long you've been idle logs what a cache stop would do without doing it.

Nothing to try yet In Development
JSON All of v2.1.251
Nothing to try yetTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
CachingArea: what it touches
In DevelopmentKind: in v2.1.251,
What probably matters to youSection of the release

Idle cache-stop policy runs in shadow mode behind an off-by-default internal flag.

What

New logic tracks main-loop request timing, when you last typed, and any delegated or background work in order to compute how long a session has been idle, then logs what a cache stop would have done. It does not act on that decision in this build, and the whole thing is behind an internal flag that defaults off.

Details
  • Purely observational: the computed stop is recorded, never applied.
Evidence

tengu_cache_heartbeat_shadow

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

See this entry in the whole of v2.1.251 →

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