> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-a46887cf.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ChatSystemMessageContent - Go SDK

> ChatSystemMessageContent type definition

<Warning>
  The Go SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/go-sdk/issues).
</Warning>

System message content

## Supported Types

###

```go lines theme={null}
chatSystemMessageContent := components.CreateChatSystemMessageContentStr(string{/* values here */})
```

###

```go lines theme={null}
chatSystemMessageContent := components.CreateChatSystemMessageContentArrayOfChatContentText([]components.ChatContentText{/* values here */})
```

## Union Discrimination

Use the `Type` field to determine which variant is active, then access the corresponding field:

```go lines theme={null}
switch chatSystemMessageContent.Type {
	case components.ChatSystemMessageContentTypeStr:
		// chatSystemMessageContent.Str is populated
	case components.ChatSystemMessageContentTypeArrayOfChatContentText:
		// chatSystemMessageContent.ArrayOfChatContentText is populated
}
```