Claude Code v2.1.174–v2.1.175: Enterprise Model Controls and Bedrock GovCloud Fix
Anthropic
Anthropic shipped two Claude Code releases on June 12. v2.1.174 fixed a Bedrock GovCloud region prefix bug (us-gov-* regions were incorrectly deriving 'global'), corrected background sessions inheriting another session's provider env vars, and added per-skill/agent/MCP usage attribution in the VSCode /usage dialog. v2.1.175 added the enforceAvailableModels managed setting, which constrains the Default model to the admin-defined allowed list and prevents user or project settings from expanding it.
Why it matters
enforceAvailableModels gives enterprise admins hard guardrails over model selection, not just soft defaults. The Bedrock GovCloud fix unblocks regulated US government cloud deployments that were seeing 400 errors.
Importance: 2/5
Enterprise guardrails + US GovCloud unblock; Anthropic frontier lab coding agent