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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 v1.0.123

1 entries read diff v1.0.122 → v1.0.123 Markdown

This release contains internal code optimizations with no user-visible changes. The codebase has been refactored to use more specific imports for better tree-shaking and bundle optimization.

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Changesopen

Code Optimization#

What: Refactored module imports to use named exports instead of namespace imports

Details:

  • Changed import OFQ from "stream" to import { PassThrough as so5 } from "stream" at line 444692
  • Changed import $9Q from "node:process" to import { cwd as $7A } from "node:process" at line 357152
  • These changes improve bundle optimization and tree-shaking by importing only the specific functions needed rather than entire modules
  • No functional changes to the CLI behavior or available commands
  • Evidence: Import refactoring at lines 357152 and 444692

Impact: This is purely an internal optimization that may slightly reduce the CLI's memory footprint and startup time, but users will not notice any behavioral differences.

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Verbatim
Official · Anthropic

Anthropic’s official release notes

Published verbatim by Anthropic for v1.0.123. 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.

  • Bash permission rules now support output redirections when matching (e.g., Bash(python:*) matches python script.py > output.txt)
  • Fixed thinking mode triggering on negation phrases like "don't think"
  • Fixed rendering performance degradation during token streaming
  • Added SlashCommand tool, which enables Claude to invoke your slash commands. https://code.claude.com/docs/en/slash-commands#SlashCommand-tool
  • Enhanced BashTool environment snapshot logging
  • Fixed a bug where resuming a conversation in headless mode would sometimes enable thinking unnecessarily
  • Migrated --debug logging to a file, to enable easy tailing & filtering
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