Claude Code v2.1.221

What's changed

• [VSCode] Added Focus view: a chat-menu toggle that hides tool activity behind an expandable per-turn summary with a live running-tool indicator, toggled with Ctrl+Alt+F or the "Claude Code: Toggle Focus view" command
• Added mode: "mask" for sandbox credential files on Linux and WSL — sandboxed commands read a sentinel copy (the whole file, or just the spans captured by an extract regex) while the sandbox proxy substitutes the real value on egress; on macOS file masking falls back to deny
• Added warnings to claude plugin validate when a marketplace or plugin name would be rejected by Claude Desktop's managed marketplace sync
• Added a prompt-audit subcommand to the claude-api skill for auditing prompts and tool descriptions for patterns written for older models
• Fixed a Bash tool permission-check bypass where zsh could execute hidden commands in [[ ]] regex conditionals; affected commands now prompt for permission
• Fixed PowerShell permission checks mishandling paths containing quote characters on Windows; such paths now prompt for approval
• Fixed the thinking toggle having no effect for the rest of a session that started with thinking off; disabling an MCP server mid-connect no longer silently reverts
• Fixed MCP servers from --mcp-config not being connected before the first turn in print mode (-p), which made the model emit tool calls as literal text
• Fixed @-mentioned files being silently dropped when pressing Esc to retract a prompt and resubmitting it
• Fixed a crash when preparing API requests for SDK MCP tools named after built-in object properties such as constructor
• Fixed WebSearch failing with a 400 error at effort xhigh/max when thinking is disabled
• Fixed sandboxed large uploads failing with TLS errors through the sandbox proxy
• Fixed Team and Enterprise spend-limit message incorrectly blaming the org's monthly limit instead of your individual spend limit
• Fixed Bedrock authentication with AWS SSO named profiles failing in desktop-managed sessions on Windows machines that set a stray HOME environment variable
• Fixed CLAUDE_CODE_RESUME_INTERRUPTED_TURN=0 not disabling interrupted-turn auto-resume; falsy values are now honored
• Fixed a rare wake-from-sleep race where two Claude Code processes could both refresh the same MCP connector or WIF OAuth token at once, forcing re-authentication
• Fixed renaming a session from Claude Code Desktop or claude.ai not updating the CLI's session name; session names from every rename surface are now sanitized
• Fixed plugin- and org-delivered skills named after terminal-only built-ins (e.g. /help, /feedback) being un-invocable in non-interactive sessions
• Fixed the "Plugins changed" notification lingering after plugins were reloaded instead of clearing
• Fixed Vim mode: the yank register now survives dialogs, history search, and the transcript view instead of being silently emptied
• Fixed Vim mode: undoing back to an empty prompt now arms the "press ← again" confirm before returning to the agent view
• Improved tool search on Google Vertex AI: re-enabled for Claude 4.5-generation and newer models
• Improved auto mode: permission checks for parallel tool calls are now cache-efficient, and switching modes while a check is pending reliably prompts instead of applying the stale result
• Reduced prompt-cache costs for auto-mode permission checks by reusing the cached conversation prefix across decisions
• Improved Stats panel to count cache tokens in its token totals, with a breakdown by input, output, cache read, and cache write
• Improved /ultrareview error messages when a repo shares no history with its base: a checkout with no branches is now refused up front with advice to create one, and refusal hints no longer suggest git fetch --unshallow on clones that are already complete
• Improved Windows startup: process creation times are now read via a native kernel32 call instead of spawning PowerShell, so endpoint s