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Claude Code 2.1.90 release notes

Version
2.1.90
Released
Status
Stable release

What's new in Claude Code 2.1.90

The official notes for Claude Code 2.1.90 list 19 changes: 3 new features, 9 fixes, 3 performance improvements and 4 other changes.

  • 3 new features
  • 9 fixes
  • 3 performance improvements
  • 4 other changes

Highlights

  • new feature Added /powerup — interactive lessons teaching Claude Code features with animated demos
  • new feature Added CLAUDE_CODE_PLUGIN_KEEP_MARKETPLACE_ON_FAILURE env var to keep the existing marketplace cache when git pull fails, useful in offline environments
  • new feature Added .husky to protected directories (acceptEdits mode)
  • performance improvement Improved performance: eliminated per-turn JSON.stringify of MCP tool schemas on cache-key lookup
  • performance improvement Improved performance: SSE transport now handles large streamed frames in linear time (was quadratic)

Our short summary: changes are counted and classified automatically from the official notes, and highlights are shortened. The complete, authoritative list is in the official release notes on GitHub.

Full release notes on GitHub (Claude Code 2.1.90)

Latest Claude Code version

2.1.296

Released · Official notes on GitHub

All Claude Code release notes · All releases

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