Claude Code 2.1.221 adds Focus view and sandbox mask mode
Version 2.1.221 adds a VS Code Focus view that hides tool activity behind an expandable per-turn summary with a live running-tool indicator (Ctrl+Alt+F), plus a "mask" mode for sandbox credential files on Linux/WSL. Also adds gateway spend-limit support to usage warnings and fixes MCP OAuth 401 errors on macOS.
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