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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 v2.0.19

2 entries read diff v2.0.18 → v2.0.19 Markdown

This is a maintenance release focused on internal code reorganization. Import statements have been restructured to use more specific destructured imports, and minified variable names have been updated throughout the codebase. No user-facing features or functionality changes in this release.

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2 entries

Changesopen

Import Statement Reorganization#

What: The codebase has reorganized how Node.js core modules are imported, moving from default imports to more specific destructured imports in several locations.

Details:

  • Replaced default import import cr from "stream" with destructured import { PassThrough as KR8 } from "stream" at line 465525
  • Replaced default import import o90 from "node:child_process" with destructured import { execSync as N2B, spawn as dM6 } from "node:child_process" at line 247555
  • Added new destructured import import { cwd as GwA } from "node:process" at line 70285, removing default import import mjQ from "node:process" at line 464092
  • Impact: These are internal refactoring changes with no effect on functionality or user experience. The same capabilities exist with different internal variable names.
  • Evidence: Import changes verified at lines 12585→465525 (stream), 35787→247555 (child_process), 464092→70285 (process)

Related

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

Minified Variable Name Updates#

What: Internal variable names and function references have been updated as part of the minification process.

Details:

  • Tool reference variable changed from ${O3} to ${R3} in TodoWrite tool example documentation at line 204339
  • Function call changed from Z4() to Q4() at lines 204403 and 204429
  • Variable name changed from qG to $G at line 204427
  • Impact: No functional changes; these are internal identifier updates from the build/minification process
  • Evidence: Variable changes in Ap2 definition at line 204216 and related functions

Related

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

1 entry

Quality Notesopen

#

This release contains no new features, bug fixes, or user-visible changes. All modifications are internal code organization improvements that maintain identical functionality while potentially improving code maintainability or build output characteristics.

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 v2.0.19. 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.

  • Auto-background long-running bash commands instead of killing them. Customize with BASH_DEFAULT_TIMEOUT_MS
  • Fixed a bug where Haiku was unnecessarily called in print mode
System prompt

The system prompt was not captured for this release, so this page cannot say whether it moved.