DevAgentRadar → Claude Code

You are helping me adopt a real coding-assistant change. Work only from the facts below. Do not invent features.

Context

Assistant: Claude Code Proposal: Enable Focus view and sandbox mode:"mask" credentials in Claude Code Summary: Turn on VS Code Focus view (Ctrl+Alt+F) to collapse tool noise, switch Linux/WSL sandbox credential files to mode:"mask", and run prompt-audit plus claude plugin validate so prompts and marketplace names stay compatible with v2.1.221. Primary source: https://github.com/anthropics/claude-code/releases/tag/v2.1.221

Why it matters

v2.1.221 adds VS Code Focus view: a chat-menu toggle (Ctrl+Alt+F or command "Claude Code: Toggle Focus view") that hides tool activity behind an expandable per-turn summary with a live running-tool indicator. Sandbox credential files on Linux and WSL gain mode:"mask" — sandboxed commands read a sentinel copy of the whole file or of spans captured by an extract regex, while the sandbox proxy substitutes the real value on egress; on macOS file masking falls back to deny. claude plugin validate now warns when a marketplace or plugin name would be rejected by Claude Desktop's managed marketplace sync. The claude-api skill adds a prompt-audit subcommand for prompts and tool descriptions written for older models. zsh [[ ]] regex conditionals and Windows PowerShell paths containing quotes no longer bypass permission checks; those commands now prompt.

Suggested actions

1. In VS Code, press Ctrl+Alt+F or run Command Palette → Claude Code: Toggle Focus view and leave it on so each turn's tool activity is hidden behind an expandable per-turn summary with a live running-tool indicator.
2. On Linux/WSL only, set sandbox credential files to mode: "mask" (add an extract regex when only captured spans should be masked; omit extract to sentinel the whole file). Confirm sandboxed commands read the sentinel and the sandbox proxy substitutes the real value on egress. Do not enable mask on macOS — file masking falls back to deny.
3. Run claude plugin validate on every marketplace catalog and plugin you ship; treat any warning that a marketplace or plugin name would be rejected by Claude Desktop managed marketplace sync as a publish blocker.
4. Using the claude-api skill, run its prompt-audit subcommand on every custom prompt and tool description you maintain; rewrite anything it flags as written for older models before relying on v2.1.221.
5. Re-exercise permission prompts for zsh commands that use [[ ]] regex conditionals and for Windows PowerShell paths that contain quote characters — v2.1.221 now prompts instead of allowing those as a permission-check bypass.

Config surfaces this release may change

• skills (high confidence) — check your repo before applying
• agent context files (high confidence) — check your repo before applying
• sandbox settings — check your repo before applying
• permission rules — check your repo before applying
• MCP servers — check your repo before applying
• settings files — check your repo before applying
• background and headless runs — check your repo before applying

After you finish

Do not report this as applied to DevAgentRadar. You cannot write the visitor's loop.

Tell the human: open https://devagentradar.com/proposals/claude-code-v2-1-221-enable-focus-view-and-sandbox-mode-mask-credentials and mark Applied, Skipped, or Failed. Proposal id: befcae7a-3771-4d7b-bebd-b41ba1a51fb5

Your job

1. Restate the change in one sentence.
2. Propose a minimal plan for my repo (or a throwaway pilot).
3. Implement only what I approve; prefer small diffs and tests.
4. Call out risks (permissions, breaking APIs, cost).

Start by confirming you understood the proposal.