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Sweep 29 Sep 2026 · 18:10Z Build v2.1.285 506 read Stable v2.1.280 Latest v2.1.285 Next v2.1.285 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.285 ·

Sandbox file storage gains directory listing and an optional sync-on-write

The sandbox's file storage on Linux, macOS and Windows can now list directories and optionally flush files to disk as they are created

Under the hood Internal Changes
JSON All of v2.1.285
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SandboxArea: what it touches
Internal ChangesKind: in v2.1.285,
Internal ChangesSection of the release
What

The part of Claude Code that reads and writes files inside its sandbox (a restricted area that limits what commands can touch) has new abilities on Linux, macOS and Windows:

  • It can list the contents of a directory.
  • It reuses a directory it already has open instead of opening it again.
  • It has an option, when creating a file, to write straight through to disk and force the data to be saved immediately.

The code that checks .gitattributes files and git directories was also reworked.

Why

The write-through option suggests a way to make sure synced files are safely stored on disk rather than held in memory.

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 turns the write-through option on is not clear.

See this entry in the whole of v2.1.285 →

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