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Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.280 ·

New atomic-write conflict error cases for staged tempfiles

Two new error cases handle stuck or duplicated temp files during atomic file writes

Under the hood Internal Changes
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What

The file-write error mapper gained two new error variants for atomic writes (writes that stage a temporary file before replacing the real one):

  • WORKING_TMP_STUCK — the staged temporary file couldn't be removed after being taken back
  • WORKING_NAME_TWINNED — the staged temporary file couldn't be removed or taken back, and may now exist as a second link at its target name
Why

These give more precise diagnostics for rare failure cases during atomic file writes, where a leftover or duplicated temp file could otherwise cause confusing or silent problems.

See this entry in the whole of v2.1.280 →

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