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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.222

Atomic writer can publish without clobbering

Under the hood
Useful2 Signal0
Elsewhere

File writing gained a mode that refuses to overwrite an existing file instead of replacing it.

What

The temp-file writer gained a create-only mode that publishes via link plus unlink instead of rename.

Details
  • In this mode an existing destination file is left intact and the write fails rather than overwriting.
  • Rename remains the default publish path.
Evidence

create_only

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

See this entry in the whole of v2.1.222 →