Claude Code v2.1.174: Wheel Scroll Acceleration Toggle, /model Fixes, GovCloud Support, and VSCode Usage Attribution

Claude Code v2.1.174 is out with a mix of usability fixes and platform-specific improvements. Several long-standing bugs around the /model picker, background sessions, and Bedrock GovCloud are now resolved. There's also a new setting for mouse-wheel behavior and expanded attribution data in the VSCode extension.

New Setting: Mouse-Wheel Scroll Acceleration Toggle

Added wheelScrollAccelerationEnabled setting to disable mouse-wheel scroll acceleration in fullscreen mode. Developers running in fullscreen terminals can now set this to false for consistent scroll behavior.

/model Picker Fixes

The /model picker no longer hides the model family that Default resolves to. Specifically:

• Opus now appears as its own row on Max, Team Premium, and Enterprise plans.
• Sonnet now appears on Pro and Team plans.
• Opus appears on pay-as-you-go API accounts.

Also fixed: the /model picker was showing a hardcoded Sonnet version label when ANTHROPIC_DEFAULT_SONNET_MODEL pinned a different Sonnet. That label now reflects the actual pinned model.

Fixed: "Fable 5" Banner for Enterprise Accounts

The banner "Fable 5 is now consuming usage credits" incorrectly showed for enterprise accounts with usage-based billing. That's now suppressed for those accounts.

Bedrock GovCloud Fix

Bedrock GovCloud regions (us-gov-*) were deriving the wrong inference profile prefix (global instead of us-gov), causing 400 errors on derived model IDs. This is fixed — the prefix now correctly uses us-gov.

Background Session Env Inheritance

Fixed background sessions inheriting another session's ANTHROPIC_* provider env (gateway URL, custom headers, /model aliases) from the shell that started the background daemon. Each session now correctly uses its own environment.

Exit Pause Fixed

A 1-2 second pause when exiting Claude Code shortly after a shell command was interrupted or killed on macOS and Linux has been resolved.

Git Commit Attribution

Fixed git commit co-author attribution showing an incorrect model name for some models.

/advisor Dialog and allowlist

The /advisor dialog no longer pre-selects a saved advisor model that is blocked by the availableModels allowlist.

Skill Hot-Reload Optimization

Skill hot-reload was re-sending the entire skill listing when a single skill changed. Now only the changed skill is re-announced, reducing unnecessary overhead.

Workflow agent() Attribution Headers

Fixed Workflow tool agent() subagents — they were missing per-agent attribution headers. Now each subagent sends proper attribution.

[VSCode] Usage Attribution Dialog

The Account & usage dialog (/usage) now shows usage attribution breakdowns over the last 24 hours or 7 days, including:

• Cache misses
• Long context
• Subagents
• Per-skill, per-agent, per-plugin, and per-MCP breakdowns

Pre-warmed Background Workers

Fixed pre-warmed background workers failing with "Could not resolve authentication method" when claimed after sitting idle.