Claude Code v2.1.221 adds Focus view and sandbox credential masking

Anthropic

Tools official 2 src. ~1 min

Claude Code 2.1.221 (Aug 4, 2026) adds a Focus view that hides tool activity behind a per-turn summary, introduces credential-file masking inside the sandbox on Linux/WSL, and fixes several Bash/PowerShell permission-check and MCP connection bugs.

Why it matters

Security hardening (credential masking, permission-check fixes) matters directly for teams running Claude Code as their daily coding agent.

Importance: 2/5

Notable minor release from a frontier lab with real security and UX changes, but not a flagship/major version.

claude-code cli coding-agent sandbox security

Sources

official Claude Code Releases

official Claude Code changelog