This skill should be used when the user wants to build an "MCP app", add "interactive UI" or "widgets" to an MCP server, "render components in chat", build "MCP UI resources", make a tool that shows a "form", "picker", "dashboard" or "confirmation dialog" inline in the conversation, or mentions "apps SDK" in the context of MCP.
Install
npx skills add anthropics/claude-plugins-official --skill build-mcp-appnpx skills add anthropics/claude-plugins-official --skill build-mcp-app -a claude-code -gnpx skills add anthropics/claude-plugins-official --skill build-mcp-app -a codex -ggemini skills install https://github.com/anthropics/claude-plugins-official.git --path plugins/mcp-server-dev/skills/build-mcp-appgh skill install anthropics/claude-plugins-official build-mcp-appgit clone --depth 1 https://github.com/anthropics/claude-plugins-official /tmp/anthropics__claude-plugins-official
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/anthropics__claude-plugins-official/plugins/mcp-server-dev/skills/build-mcp-app ~/.claude/skills/build-mcp-app # Claude Code
cp -R /tmp/anthropics__claude-plugins-official/plugins/mcp-server-dev/skills/build-mcp-app ~/.agents/skills/build-mcp-app # Codex, Cursor, Gemini CLI, Copilot, OpenCode