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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 v2.1.299 ·

Cloud sessions measure how long a spare session waits before use

Claude Code now records the time from a spare cloud session starting to it being picked up, using CCR_SPAWN_TIMESTAMP_MS

Under the hood No documentation found Internal Changes
JSON All of v2.1.299
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Cloud SessionsArea: what it touches
Internal ChangesKind: in v2.1.299,
Internal ChangesSection of the release
What

When a spare cloud session, one started ahead of time so it is ready when needed, is picked up for use, Claude Code now records how long it has been since it started. The start time is read from the CCR_SPAWN_TIMESTAMP_MS environment variable, which is a value passed to a program when it starts.

Why

This is a measurement only and does not change how sessions behave.

Read from
Names in the bundleCCR_SPAWN_TIMESTAMP_MS

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