GPT4AllSharp

C# client for interacting with GPT4All through its OpenAI-compatible endpoints.

Features

• Complete support for GPT4All's native API
• OpenAI-compatible API endpoint support
• Streaming text generation
• Comprehensive configuration options
• Built-in error handling and logging
• Cross-platform compatibility
• Full async/await support

📦 View Package on NuGet

Installation

Install via NuGet:

dotnet add package SpongeEngine.GPT4AllSharp

Quick Start

Using Native API

using LocalAI.NET.KoboldCpp.Client;
using LocalAI.NET.KoboldCpp.Models;

// Configure the client
var options = new KoboldCppOptions
{
    BaseUrl = "http://localhost:5001",
    UseGpu = true,
    ContextSize = 2048
};

// Create client instance
using var client = new KoboldCppClient(options);

// Generate completion
var request = new KoboldCppRequest
{
    Prompt = "Write a short story about a robot:",
    MaxLength = 200,
    Temperature = 0.7f,
    TopP = 0.9f
};

var response = await client.GenerateAsync(request);
Console.WriteLine(response.Results[0].Text);

// Stream completion
await foreach (var token in client.GenerateStreamAsync(request))
{
    Console.Write(token);
}

Using OpenAI-Compatible API

var options = new KoboldCppOptions
{
    BaseUrl = "http://localhost:5001",
    UseOpenAiApi = true
};

using var client = new KoboldCppClient(options);

// Simple completion
string response = await client.CompleteAsync(
    "Write a short story about:",
    new CompletionOptions
    {
        MaxTokens = 200,
        Temperature = 0.7f,
        TopP = 0.9f
    });

// Stream completion
await foreach (var token in client.StreamCompletionAsync(
    "Once upon a time...",
    new CompletionOptions { MaxTokens = 200 }))
{
    Console.Write(token);
}

Configuration Options

Basic Options

var options = new KoboldCppOptions
{
    BaseUrl = "http://localhost:5001",    // KoboldCpp server URL
    ApiKey = "optional_api_key",          // Optional API key
    TimeoutSeconds = 600,                 // Request timeout
    ContextSize = 2048,                   // Maximum context size
    UseGpu = true,                        // Enable GPU acceleration
    UseOpenAiApi = false                  // Use OpenAI-compatible API
};

Advanced Generation Parameters

var request = new KoboldCppRequest
{
    Prompt = "Your prompt here",
    MaxLength = 200,                      // Maximum tokens to generate
    MaxContextLength = 2048,              // Maximum context length
    Temperature = 0.7f,                   // Randomness (0.0-1.0)
    TopP = 0.9f,                          // Nucleus sampling threshold
    TopK = 40,                            // Top-K sampling
    TopA = 0.0f,                          // Top-A sampling
    Typical = 1.0f,                       // Typical sampling
    Tfs = 1.0f,                          // Tail-free sampling
    RepetitionPenalty = 1.1f,            // Repetition penalty
    RepetitionPenaltyRange = 64,         // Penalty range
    StopSequences = new List<string> { "\n" },  // Stop sequences
    Stream = false,                       // Enable streaming
    TrimStop = true,                     // Trim stop sequences
    MirostatMode = 0,                    // Mirostat sampling mode
    MirostatTau = 5.0f,                  // Mirostat target entropy
    MirostatEta = 0.1f                   // Mirostat learning rate
};

Error Handling

try
{
    var response = await client.GenerateAsync(request);
}
catch (KoboldCppException ex)
{
    Console.WriteLine($"KoboldCpp error: {ex.Message}");
    Console.WriteLine($"Provider: {ex.Provider}");
    if (ex.StatusCode.HasValue)
    {
        Console.WriteLine($"Status code: {ex.StatusCode}");
    }
    if (ex.ResponseContent != null)
    {
        Console.WriteLine($"Response content: {ex.ResponseContent}");
    }
}
catch (Exception ex)
{
    Console.WriteLine($"General error: {ex.Message}");
}

Logging

The client supports Microsoft.Extensions.Logging:

ILogger logger = LoggerFactory
    .Create(builder => builder
        .AddConsole()
        .SetMinimumLevel(LogLevel.Debug))
    .CreateLogger<KoboldCppClient>();

var client = new KoboldCppClient(options, logger);

JSON Serialization

Custom JSON settings can be provided:

var jsonSettings = new JsonSerializerSettings
{
    NullValueHandling = NullValueHandling.Ignore,
    DefaultValueHandling = DefaultValueHandling.Ignore
};

var client = new KoboldCppClient(options, jsonSettings: jsonSettings);

Testing

The library includes both unit and integration tests. Integration tests require a running KoboldCpp server.

To run the tests:

dotnet test

To configure the test environment:

// Set environment variables for testing
Environment.SetEnvironmentVariable("KOBOLDCPP_BASE_URL", "http://localhost:5001");
Environment.SetEnvironmentVariable("KOBOLDCPP_OPENAI_BASE_URL", "http://localhost:5001/v1");

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Support

For issues and feature requests, please use the GitHub issues page.