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Concepts
Core Concepts
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Introduction
Create your ChatGPT App
Add to Existing App
Test Your App
MCP and ChatGPT Apps Fundamentals
Concepts
Core Concepts
Data Flow
LLM Context Sync
Fast Iteration
Type Safety
Guides
Fetching Data
Managing State
Communicating with the Model
Host Environment Context
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Concepts
Core Concepts
We assume that you are already familiar with ChatGPT Apps and MCP Servers here. If you’re not, read
MCP and ChatGPT Apps Fundamentals
first.
Four concepts power Skybridge:
Data Flow
How data moves between server, ChatGPT, 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 Data Flow
— it establishes the three-actor model that other concepts build on.
MCP and ChatGPT Apps Fundamentals
Data Flow
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