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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 v2.1.239 ·

Transcript writer knows when writes are still outstanding

The transcript writer can now report whether writes are still pending, so nothing reads a half-written file.

Under the hood Internal Changes
JSON All of v2.1.239
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SessionsArea: what it touches
Internal ChangesKind: in v2.1.239,
Internal ChangesSection of the release
What

The component that writes your session transcript now counts writes in progress and exposes a check for whether any remain, so other code can wait rather than acting on a partly written file.

Details
  • Separate counters track queued flushes and direct appends, each decremented in a finally block so a failed write does not leave the count stuck.
Evidence

appendInFlight()

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

See this entry in the whole of v2.1.239 →

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