v2.1.23 Claude Code Release Notes

Jan 29, 2026

Claude's Analysisby Sonnet 4.6

mTLS and proxy fixes unblock corporate users; 2 hang fixes, a race condition causing 400 errors resolved, and AWS Bedrock makes its first tracked appearance.

Changes

Total Changes (vs Average)

0.9×

Version Type

Patch

Release Focus

Bug Fixes

Day Since Prior Release

Release # This Month

#23 of 26

Bug Fix Ratio

64%

Post-Release Edits

—

Change Category

Ecosystem Impact

AWS Bedrock makes its first tracked appearance — a single IDE fix for region string display in headless mode. Narrow in scope, but marks the first time Bedrock-specific issues have surfaced in the changelog, signaling growing enterprise deployment complexity.

Key Themes

2Enterprise Connectivity Unblocked|3Session Stability & Silent Failures|5Terminal & UI Polish|1AWS Bedrock Surfaces

May Help If You've Noticed

Claude Code fails to connect behind a corporate firewall, proxy, or when using client certificates

Added1 change

•Added customizable spinner verbs setting (spinnerVerbs)

Improved1 change

•Improved terminal rendering performance with optimized screen data layout

Fixed7 changes

•Fixed mTLS and proxy connectivity for users behind corporate proxies or using client certificates
•Fixed per-user temp directory isolation to prevent permission conflicts on shared systems
•Fixed a race condition that could cause 400 errors when prompt caching scope was enabled
•Fixed pending async hooks not being cancelled when headless streaming sessions ended
•Fixed tab completion not updating the input field when accepting a suggestion
•Fixed ripgrep search timeouts silently returning empty results instead of reporting errors
•[IDE] Fixed model options displaying incorrect region strings for Bedrock users in headless mode

Changed2 changes

•Changed Bash commands to show timeout duration alongside elapsed time
•Changed merged pull requests to show a purple status indicator in the prompt footer

Fixed7 changes

•Fixed mTLS and proxy connectivity for users behind corporate proxies or using client certificates

•Fixed per-user temp directory isolation to prevent permission conflicts on shared systems

•Fixed a race condition that could cause 400 errors when prompt caching scope was enabled

•Fixed pending async hooks not being cancelled when headless streaming sessions ended

•Fixed tab completion not updating the input field when accepting a suggestion

•Fixed ripgrep search timeouts silently returning empty results instead of reporting errors

•[IDE] Fixed model options displaying incorrect region strings for Bedrock users in headless mode

v2.1.23 Claude Code Release Notes

Changes in Claude Code v2.1.23

Added1 change

Improved1 change

Fixed7 changes

Changed2 changes

v2.1.23 Claude Code Release Notes

Changes in Claude Code v2.1.23

Added1 change

Improved1 change

Fixed7 changes

Changed2 changes