[Release] anthropics/claude-code v2.1.174: v2.1.174

Claude Code v2.1.174 release includes UI improvements for model selection, fixes for environment variable inheritance in background sessions, corrections to Bedrock GovCloud region handling, and enhanced usage attribution tracking in VSCode. The update addresses multiple edge cases affecting model display, authentication, and performance, particularly for enterprise users with specialized billing configurations.

Key Points

• •Added `wheelScrollAccelerationEnabled` setting to control mouse-wheel scroll acceleration in fullscreen mode for improved UX customization
• •Fixed `/model` picker to correctly display model families (Opus, Sonnet) based on plan tier instead of hiding the default model option
• •Corrected hardcoded Sonnet version labels when `ANTHROPIC_DEFAULT_SONNET_MODEL` environment variable pins a different Sonnet version
• •Fixed Bedrock GovCloud region handling to use correct `us-gov` prefix instead of `global`, preventing 400 errors on derived model IDs
• •Resolved background session environment variable inheritance issue where sessions inherited `ANTHROPIC_*` provider settings from parent shell daemon
• •Eliminated 1-2 second pause on macOS/Linux when exiting Claude Code after shell command interruption or termination
• •Enhanced VSCode `/usage` dialog with detailed attribution breakdown including cache misses, long context, subagents, and per-skill/agent/plugin/MCP metrics over 24h or 7d periods
• •Fixed skill hot-reload to only re-announce changed skills instead of resending entire skill listing for better performance
• •Corrected git commit co-author attribution to display accurate model names across all model types
• •Fixed pre-warmed background worker authentication failures after idle periods

Workflow Diagram

Concepts