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mcp-apps

97 / 100 · Low risk

Fine to try.

By b-open-io/prompts (GitHub) · design · 15 stars · scanned at commit f4b302a

This skill provides guidance for building MCP Apps, the official io.modelcontextprotocol/ui extension for interactive HTML interfaces inside MCP hosts. This skill should be used when the user asks to "create an MCP App", "add UI to an MCP tool", "build interactive MCP", "ui:// resource", "sandboxed iframe MCP", "interactive chat UI", "embed UI in chat", "MCP tool with interface", or needs capability negotiation, resource CSP, app-only tools, host lifecycle, or progressive text fallbacks.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'mcp-apps' ] || [ -L ~/.agents/skills/'mcp-apps' ]; then echo 'A skill folder named mcp-apps already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/b-open-io/prompts' "$d" && git -C "$d" checkout --quiet 'f4b302aadb0c99023b03e1f1b38ffed3697fbedf' -- 'modules/mcp-dev/skills/mcp-apps' && mkdir -p ~/.agents/skills && cp -R "$d"/'modules/mcp-dev/skills/mcp-apps' ~/.agents/skills/'mcp-apps' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'mcp-apps' ~/.claude/skills/'mcp-apps' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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