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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 ·

Downloads no longer overwrite an existing file

Downloads now fail rather than silently truncating a file that already exists.

You'll notice Improvements
JSON All of v2.1.239
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
ImprovementsKind: in v2.1.239,
ImprovementsSection of the release
What

Update and asset downloads now open the destination with an exclusive-create flag, so a download into a path that already exists fails instead of truncating whatever was there.

Details
  • The write stream is created with { flags: "wx" }, which errors rather than replacing an existing target.
Evidence

createWriteStream(t, { flags: "wx" })

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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