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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 v2.1.12

3 entries read diff v2.1.11 → v2.1.12 Markdown

This is a maintenance release with no user-facing changes. The release updates internal build artifacts and refreshes minification identifiers, but does not introduce any new features, improvements, or bug fixes that affect the user experience.

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New Featuresopen

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Improvementsopen

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Notesopen

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Build Information:

  • Version: 2.1.12
  • Build timestamp: 2026-01-17T15:40:09Z
  • Structural similarity to v2.1.11: 99.8%

This release appears to be a routine re-release with updated build artifacts. The 12,420 identifier renames and minor import restructuring are purely internal minification changes that do not affect functionality.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

Verbatim
Official · Anthropic

Anthropic’s official release notes

Published verbatim by Anthropic for v2.1.12. Text is unmodified from the upstream changelog. Everything else on this page came out of the bundle instead, which is why the two lists don't match.

  • Fixed message rendering bug
Read it on GitHub →
System prompt

No change to the system prompt since v2.1.11.

Agent SDK, print mode

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