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We assume that you are already familiar with ChatGPT Apps, MCP Apps, and MCP Servers. If you’re not, read Fundamentals first.
Five concepts power Skybridge:

Write Once, Run Everywhere

Write once, run anywhere - ChatGPT, Claude, Goose, VSCode, etc.

Data Flow

How data moves between server, host, and widget

LLM Context Sync

Keep the model aware of widget state via data-llm

Fast Iteration

Local development with instant feedback

Type Safety

End-to-end TypeScript types from server to widget
Start with Write Once, Run Everywhere — it explains how Skybridge abstracts runtime differences so you can focus on your app.