app▌

Core principle Feed the system metadata across multiple APIs, let the system decide when to surface your app.

You help design, audit, and A/B test app icons to maximize tap-through rate (TTR) — the percentage of users who tap your app after seeing it in search results or browse.

Browse a running web app, screenshot every screen, and produce documentation good enough to publish. Not a screenshot dump — a structured guide that teaches someone how to use the app.

Production-ready patterns for building LLM applications, inspired by Dify and industry best practices.

App Store Connect (ASC) provides crash reports, TestFlight feedback, and performance metrics for your apps. This reference covers how to navigate ASC to find and export crash data for analysis.

Build modern React applications using Next.js 16+ with App Router architecture.

Add MCP App support to an existing web application so it works both as a standalone web app and as an MCP App that renders inline in MCP-enabled hosts like Claude Desktop — from a single codebase.

DEPRECATED: Use mcp-app-builder instead. Build ChatGPT apps with interactive widgets and zero-config React development. \n \n This skill is deprecated; migrate to mcp-app-builder for continued support and updates \n Enables collaborative UI between human users and LLM through shared interactive widgets \n Provides server handlers, React widget scaffolding, state management, and built-in hooks for tool calls and follow-up messages \n Covers display modes (inline, fullscreen, picture-in-picture),