.Net: Voyageai integration

dotnet/samples/Concepts/Embeddings/VoyageAI_TextEmbedding.cs

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+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.Connectors.VoyageAI;
+
+namespace Embeddings;
+
+/// <summary>
+/// Example demonstrating VoyageAI text embeddings with Semantic Kernel.
+/// </summary>
+public class VoyageAI_TextEmbedding(ITestOutputHelper output) : BaseTest(output)
+{
+    [Fact]
+    public async Task GenerateTextEmbeddingsAsync()
+    {
+        // Get API key from environment
+        var apiKey = Environment.GetEnvironmentVariable("VOYAGE_AI_API_KEY")
+            ?? throw new InvalidOperationException("Please set the VOYAGE_AI_API_KEY environment variable");
+
+        // Create embedding service
+        var embeddingService = new VoyageAITextEmbeddingGenerationService(
+            modelId: "voyage-3-large",
+            apiKey: apiKey
+        );
+
+        // Generate embeddings
+        var texts = new List<string>
+        {
+            "Semantic Kernel is an SDK for integrating AI models",
+            "VoyageAI provides high-quality embeddings",
+            "C# is a modern, object-oriented programming language"
+        };
+
+        Console.WriteLine("Generating embeddings for:");
+        for (int i = 0; i < texts.Count; i++)
+        {
+            Console.WriteLine($"{i + 1}. {texts[i]}");
+        }
+
+        var embeddings = await embeddingService.GenerateEmbeddingsAsync(texts);
+
+        Console.WriteLine($"\nGenerated {embeddings.Count} embeddings");
+        Console.WriteLine($"Embedding dimension: {embeddings[0].Length}");
+        Console.WriteLine($"First embedding (first 5 values): [{string.Join(", ", embeddings[0].Span[..5].ToArray())}]");
+    }
+}

dotnet/samples/Concepts/Reranking/VoyageAI_Reranking.cs

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+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.Connectors.VoyageAI;
+
+namespace Reranking;
+
+/// <summary>
+/// Example demonstrating VoyageAI reranking with Semantic Kernel.
+/// </summary>
+public class VoyageAI_Reranking(ITestOutputHelper output) : BaseTest(output)
+{
+    [Fact]
+    public async Task RerankDocumentsAsync()
+    {
+        // Get API key from environment
+        var apiKey = Environment.GetEnvironmentVariable("VOYAGE_AI_API_KEY")
+            ?? throw new InvalidOperationException("Please set the VOYAGE_AI_API_KEY environment variable");
+
+        // Create reranking service
+        var rerankingService = new VoyageAITextRerankingService(
+            modelId: "rerank-2.5",
+            apiKey: apiKey
+        );
+
+        // Define query and documents
+        var query = "What are the key features of Semantic Kernel?";
+
+        var documents = new List<string>
+        {
+            "Semantic Kernel is an open-source SDK that lets you easily build agents that can call your existing code.",
+            "The capital of France is Paris, a beautiful city known for its art and culture.",
+            "Python is a high-level, interpreted programming language with dynamic typing.",
+            "Semantic Kernel provides enterprise-ready AI orchestration with model flexibility and plugin ecosystem.",
+            "Machine learning models require large amounts of data for training."
+        };
+
+        Console.WriteLine($"Query: {query}\n");
+        Console.WriteLine("Documents to rerank:");
+        for (int i = 0; i < documents.Count; i++)
+        {
+            Console.WriteLine($"{i + 1}. {documents[i]}");
+        }
+
+        // Rerank documents
+        var results = await rerankingService.RerankAsync(query, documents);
+
+        Console.WriteLine("\nReranked results (sorted by relevance):");
+        for (int i = 0; i < results.Count; i++)
+        {
+            var result = results[i];
+            Console.WriteLine($"\n{i + 1}. Score: {result.RelevanceScore:F4}");
+            Console.WriteLine($"   Original Index: {result.Index}");
+            Console.WriteLine($"   Text: {result.Text}");
+        }
+    }
+}

dotnet/src/Connectors/Connectors.VoyageAI.UnitTests/Connectors.VoyageAI.UnitTests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <RootNamespace>Microsoft.SemanticKernel.Connectors.VoyageAI.UnitTests</RootNamespace>
+    <AssemblyName>Microsoft.SemanticKernel.Connectors.VoyageAI.UnitTests</AssemblyName>
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+    <Nullable>enable</Nullable>
+    <NoWarn>$(NoWarn);SKEXP0001</NoWarn>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" />
+    <PackageReference Include="xunit" />
+    <PackageReference Include="xunit.runner.visualstudio" />
+    <PackageReference Include="Moq" />
+    <PackageReference Include="FluentAssertions" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Connectors.VoyageAI\Connectors.VoyageAI.csproj" />
+  </ItemGroup>
+
+</Project>