Function ModelContext

ModelContext(props: ModelContextProps): Element | null
Annotate a portion of the view UI with a description the model can see.

Registers content in a hierarchical tree that serializes into an indented markdown list under _uiContext. The store merges that field with useViewState and sends the complete snapshot through ChatGPT widget state or MCP Apps ui/update-model-context. Updates batch per microtask. Failed requests stay dirty and retry after the next mutation.

An empty content (trimmed) does not register a node and does not orphan children — nested ModelContext nodes re-parent to the nearest registered ancestor (or root).

On the MCP Apps path, a host without the updateModelContext capability skips pushes and receives a one-time console.warn.
Parameters
- props: ModelContextProps
  Component props.
  - content
    
    Text describing what the user is currently seeing.
  - children
    
    Optional nested UI; nested ModelContext nodes serialize as indented children of this node when this node has non-empty content.
Returns Element | null
Example
```
<ModelContext content={`Selected: ${item.name}`} />

<ModelContext content="Dashboard">
  <ModelContext content="Revenue section" />
</ModelContext>
```
- Defined in react/components/model-context.tsx:77