Linq.AI 2.1.0

Linq.AI

This library adds Linq extension methods which use AI models to transform and manipulate data.

Installation

dotnet add package Linq.AI
dotnet add package Linq.AI.OpenAI

ITransformer

The Linq.AI package needs an ITransformer for the AI model that is being used.

Currently there is an implementation for OpenAI which you can get by installing Linq.AI.OpenAI

You instantiate a transformer like this:

var model = new new OpenAITransformer(model: "gpt-4o-mini", "<open ai key>");

NOTE: The model must support structured output.

Model Extensions

The model extensions add methods to the ITransformer model to work with a single item (aka text, object, etc.).

model.Classify()

Classify an item using an enumeration or list of categories.

enum Genres { Rock, Pop, Electronica, Country, Classical };
var classification = model.Classify<Genres>(item);

model.Summarize()

Summarize the item

var summary = model.Summarize(item, "with 3 words");

model.Matches()

Get true/false if the item matches the question

if (model.Matches(item, "there is date"))
  ...

model.Query()

Ask a question using models knowledge.

var answer = model.Query("what is the birthday of barack obama?");

model.QueryAbout()

Ask a question about an item

var answer = model.QueryAbout(item, "what is his birthday?");

model.Select()

Extracts a collection of items from the item.

Example using model to select text from the item

var words = model.Select<string>(item, "The second word of every paragraph");

Example using model to select structed data.

public class HREF 
{ 
	public string Url {get;set;}
	public string Title {get;set;}
}
var summary = model.Select<HREF>(item);

model.Compare()

Compares two objects for semantic equivelancy.

Assert.IsTrue(Model.Compare("fourteen", "14"));
Assert.IsTrue(Model.Compare("fourteen years old", "10 + 4 years"));
Assert.IsTrue(Model.Compare("Me llamo Tom", "Mi nombre es Tom"));
Assert.IsTrue(Model.Compare("My name is Tom", "Mi nombre es Tom", instructions: "allow different langauges to be semantically equal"));
Assert.IsFalse(Model.Compare("Me llamo Tom", "Mi padre es Tom"));
Assert.IsTrue(await Model.CompareAsync(
	new 
	{ 
	    Introduction = "My name is Tom", 
	    Background="I live in Kirkland, Washington"
	},
	new
	{
	    Introduction = "I'm Tom",
	    Background = "I'm from Kirkland, Washington"
	}));

Linq Extensions

The object extensions use the ITransformer model to work each item in a collections.

NOTE: These methods internally run AI calls as throttled parallel background tasks.

enumerable.Select()

.Select() let's you transform the source into target using an ITransformer model.

You can use it to transform an object from one format to another by simply giving the types. The model will use AI to appropriately map the properties between the object types.

var targetItems = items.Select<SourceItem,TargetItem>(model)

Transform a collection of text into another format, like markdown.

var markdownItems = items.Select(model,	goal: """"
					transform each item into markdown like this:
					# {{TITLE}}
					{{AUTHOR}}
					{{DESCRIPTION}}
					""");

enumerable.Where()/enumerable.Remove()

Filter a collection using natural language

var smallItems = items.Where(model, "item would fit in a bread box");
var bigItems = items.Remove(model, "item would fit in a bread box");

enumerable.Classify()

This allows you to classify each item using a model;

enum Genres { Rock, Pop, Electronica, Country, Classical };
var classifiedItems = items.Classify<Genres>(model);

enumerable.Summarize()

Generate text summary for each item using an ITransformer model.

var summaries = items.Summarize(model);

You can control the summarization with a hint

var summaries = items.Summarize(model, "generate a 3 word summary");

enumerable.QueryAboutEach()

This operator let's you ask a question for each item in a collection.

var answers = items.QueryAboutEach<float>(model, "What is the cost?");

ITransformer

The ITransformer implements the core primatives for using AI to manipulate generation and transformation.

transformer.Generate()

Given a model and a goal return a shaped result.

var haiku = transformer.Generate<string>("write a haiku about camping");
var names = transformer.Generate<string[]>("funny names for people named bob");
var cities = transformer.Generate<City[]>("return the top 5 largest cities in the world.");

transformer.TransformItem()

Given a model and a goal return a shaped result.

var result = model.TransformItem<string>("my name is Tom", "translate to spanish);
// ==> "Me llamo Tom"

transformer.TransformItems()

Transform a collection of items using a model and a goal.

var items = new string[] {"Hello", "My name is Tom", "One more please"];
var results = items.TransformItems(model, "translate to spanish);
// result[0] = "Hola"
// result[1] = "Me llamo Tom"
// result[2] = "Una mas, por favor"

Linq.AI and Vision

You can use Linq.AI and the model to work with images.

Simply pass a Uri() to an image or a ChatMessageContentPart for the image and you can call any of the extension methods.

Examples:

var uri = new Uri("https://2cupsoftravel.com/wp-content/uploads/2022/10/Oktoberfest-munich-things-to-know.jpg");
var uri2 = new Uri("https://2cupsoftravel.com/wp-content/uploads/2022/10/20220928_115250-1200x900.jpg");

// summarize an image uri
var summmary = await Model.SummarizeAsync(uri);

// ask a question about a group of image uris
var matches = await Model.MatchesAsync(new [] { uri, uri2 }, "Are these pictures of people drinking beer?");

// extract text out of an image uri.
var text = await Model.SelectAsync<string>(uri, "Extract all phrases from the image");

// upload and classify an image binary
var imagePart = ChatMessageContentPart.CreateImagePart(BinaryData.FromBytes(imageBytes), "image/jpeg");
var classification = await Model.ClassifyAsync<Mood>(imagePart);

Adding Tools

Linq.AI makes it super easy to add tools to your OpenAI model. There are 2 ways to do it:

• Define a static class with static methods on it
• Create a Delegate

If the model decides it needs the result of your function Liqn.AI will automatically invoke the function doing all of the type wrangling needed and then pass the result back to the model to use to create the final answer.

NOTE: Delegates can be synchronous or async.

public static class MyFunctions
{
    [Description("Perform PowPow calculation")]
    public static double PowPow(  [Description("first number")][Required] double x, 
                                  [Description("second number")][Required] double y)
    {
        return Math.Pow(x,y);
    }
}

var model = new new OpenAITransformer(model: "gpt-4o-mini", "<open ai key>")
    .AddTools<MyFunctions>()
    .AddTool("Sum", "Add 2 numbers", 
        ([Description("the first number to add") int x, 
         [Description("the second number to add") int y) 
        {
            return x+y;
        })
    .AddTool("LookupAlbumCover", "Lookup up a record album covere", 
        async ([Description("the album name") string name, CancellationToken ct) => 
        {
            await Task.Delay(1000);
            return result;
        });

Now if query needs the result of the function it will just work

    model.Generate<double>("What's the powpow for 3 and 4?");

InstructionAttribute

You can add [Description] or [Instruction] attributes to properties on you classes to help the LLM properly work with your objects when the property name is amibiguious.

public class LeaderInfo
{
    [Instruction("The name of country that the person is leader for")]
    public string Name {get;set;}

    [Instruction("The title for the leadership role the leader has. (Example: President)")]
    public string Title {get;set;}

    [Instruction("The full name for the leader")]
    public string FullName {get;set;}

    [Instruction("The year they took the role.")]
    public int? Date { get; set;}
}
var leader = model.Query<LeaderInfo>("barack obama");
// {"Name":"United States","Title":"President","FullName":"Barack Hussein Obama II","Date":2009}

Defining new operators

To create a custom operator you create an static class and define static methods for the ITransformer or collection of objects.

For example, here is the implementation of Summarize():

• The SummarizeAsync() method defines object operator which calls TransformItemAsync with a default goal of "Create a summarization" with result type of string.
• The Summarize() method defines a collection operator which calls TransformItems with a default goal of "Create a summarization" with result type for each item in the collection of string.

    public static class SummarizeExtension
    {
        // operator to summarize object
        public static string Summarize(this ITransformer model, object item, string? goal, string? instructions = null, CancellationToken cancellationToken = default)
            => model.TransformItem<string>(item, goal ?? "create a summarization", instructions, cancellationToken);

        // operator to summarize object
        public static Task<string> SummarizeAsync(this ITransformer model, object item, string? goal, string? instructions = null, CancellationToken cancellationToken = default)
            => model.TransformItemAsync<string>(item, goal ?? "create a summarization", instructions, cancellationToken);

        // operator to summarize collection of objects
        public static IList<string> Summarize(this IEnumerable<object> source, ITransformer model, string? goal = null, string? instructions = null, int? maxParallel = null, CancellationToken cancellationToken = default)
            => model.TransformItems<string>(source, goal ?? "create a summarization", instructions, maxParallel, cancellationToken);
    }

This library was heaviy inspired by stevenic's agentm-js library, Kudos!