> ## Documentation Index
> Fetch the complete documentation index at: https://docs.galileo.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Event

***

# Type Alias: Event

```ts theme={null}
type Event =
  | MessageEvent
  | ReasoningEvent
  | InternalToolCall
  | ImageGenerationEvent
  | MCPCallEvent
  | MCPListToolsEvent
  | MCPApprovalRequestEvent;
```

Defined in: [src/types/logging/span.types.ts](https://github.com/rungalileo/galileo-js/blob/main/src/types/logging/span.types.ts)

Union of all event types.