How to use go-anthropic for real-time applications

The library supports streaming completions and streaming messages, which allow you to get real-time responses from the Anthropic API[1][3]. The `CreateMessagesStream` method streams the response from the Anthropic API, rather than waiting for the full response[3]. This is useful for real-time applications that need to display the AI's response as it is generated.

Additionally, the library supports the use of "tools" which allow the AI to perform external actions and return the results back to the application[3]. This enables real-time interactions where the AI can look up information, perform calculations, or take other actions on behalf of the user.

For example, you can define a tool in the `MessagesRequest` that gets the current weather in a given location[3]:

go
request := anthropic.MessagesRequest{
    Tools: []anthropic.ToolDefinition{
        {
            Name: "get_weather",
            Description: "Get the current weather in a given location",
            InputSchema: jsonschema.Definition{
                Type: jsonschema.Object,
                Properties: map[string]jsonschema.Definition{
                    "location": {
                        Type: jsonschema.String,
                        Description: "The city and state, e.g. San Francisco, CA",
                    },
                    "unit": {
                        Type: jsonschema.String,
                        Enum: []string{"celsius", "fahrenheit"},
                        Description: "The unit of temperature, either 'celsius' or 'fahrenheit'",
                    },
                },
                Required: []string{"location"},
            },
        },
    },
}

The AI can then use this tool to look up the weather and return the results in real-time.

Overall, the go-anthropic library is well-suited for building real-time applications that leverage the capabilities of the Anthropic Claude API. The streaming and tool features make it possible to create responsive, interactive experiences.