Use when the user explicitly wants a ChatGPT App, Apps SDK project, MCP server plus widget UI, ChatGPT-compatible tool UI, or submission/deployment work for that surface. Build, scaffold, refactor, or troubleshoot those projects from Claude Code, consult openai-docs before generating code, and use openai-platform-api-key before any app path that requires live OpenAI API credentials.
Install
npx skills add openai/openai-developers-for-claude --skill build-chatgpt-appnpx skills add openai/openai-developers-for-claude --skill build-chatgpt-app -a claude-code -gnpx skills add openai/openai-developers-for-claude --skill build-chatgpt-app -a codex -ggemini skills install https://github.com/openai/openai-developers-for-claude.git --path plugins/openai-developers/skills/build-chatgpt-appgh skill install openai/openai-developers-for-claude build-chatgpt-appgit clone --depth 1 https://github.com/openai/openai-developers-for-claude /tmp/openai__openai-developers-for-claude
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/openai__openai-developers-for-claude/plugins/openai-developers/skills/build-chatgpt-app ~/.claude/skills/build-chatgpt-app # Claude Code
cp -R /tmp/openai__openai-developers-for-claude/plugins/openai-developers/skills/build-chatgpt-app ~/.agents/skills/build-chatgpt-app # Codex, Cursor, Gemini CLI, Copilot, OpenCode