Exercise - Combine prompts and functions - Training

10 minutes

For this exercise, you combine your native functions with a prompt that asks the LLM to generate a recommended song for the user based on their recent plays. Let's get started!

In your MusicLibraryPlugin.cs file, add the following function:

[KernelFunction, Description("Get a list of music available to the user")]
public static string GetMusicLibrary()
{
    string dir = Directory.GetCurrentDirectory();
    string content = File.ReadAllText($"{dir}/musiclibrary.txt");
    return content;
}

Create a new file in the 'M03-Project' folder called 'musiclibrary.txt' and paste the following content:

[
    { title: "See Tinh", artist: "Thach Ngoc", genre: "pop, Vietnamese pop" },
    { title: "Luv(sic)", artist: "Chishin", genre: "hiphop, rap, Japanese hiphop" },
    { title: "Kids", artist: "Omar Bennett", genre: "synthpop, alternative, indie" },
    { title: "Ana Negm", artist: "Dabir", genre: "pop, arabic hiphop, Egyptian rap" },
    { title: "Ladies that are Single", artist: "Sydney", genre: "pop, r&b" },
    { title: "Oblivion", artist: "Eugenia", genre: "alternative, indie, electropop" },
    { title: "1901", artist: "Andre", genre: "synthpop, alternative, indie" },
    { title: "Suisei", artist: "Mirai", genre: "pop, Japanese pop" },
    { title: "Sabry Aalil", artist: "Yasemin", genre: "pop, Egyptian pop" },
    { title: "From Eden", artist: "Henry", genre: "blues, soul, electropop" },
    { title: "Sofia", artist: "Gaby", genre: "alternative, indie, pop" },
    { title: "Strawberry Blond", artist: "Nanami", genre: "Indie, Alternative, Folk"},
    { title: "July", artist: "Lisa Taylor", genre: "indie, folk" }
]

Update your 'Program.cs' file with the following code:

var kernel = builder.Build();
kernel.ImportPluginFromType<MusicLibraryPlugin>();

string prompt = @"This is a list of music available to the user:
    {{MusicLibraryPlugin.GetMusicLibrary}} 

    This is a list of music the user has recently played:
    {{MusicLibraryPlugin.GetRecentPlays}}

    Based on their recently played music, suggest a song from
    the list to play next";

var result = await kernel.InvokePromptAsync(prompt);
Console.WriteLine(result);

In this code, you combine your native functions with a semantic prompt. The native functions are able to retrieve user data that the large language model (LLM) couldn't access on its own, and the LLM is able to generate a song recommendation based on the text input.

To test your code, enter dotnet run in the terminal.

You should see a response similar to the following output:
```
Based on the user's recently played music, a suggested song to play next could be "Sabry Aalil" by Yasemin since the user seems to enjoy pop and Egyptian pop music.
```
Note

The recommended song may be different than the one shown here.

You successfully combined your native functions with a semantic prompt. You have the beginnings of a music recommendation agent! Try playing around with the prompts and input files to see what other recommendations you can generate.

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Exercise - Combine prompts and functions

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