OpenHub.Agents.Abstractions 0.1.9

OpenHub.Agents

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OpenHub.Agents is a task-oriented abstraction layer built on top of the Microsoft Agents SDK and the GitHub Copilot SDK. It wraps different AI backends behind a unified ITaskAgent API so callers can create tasks and consume streaming updates in one consistent way.

Features

• Unified ITaskAgent abstraction for task creation and streaming subscriptions
• Multi-targeting support for netstandard2.0, netstandard2.1, net8.0, net9.0, and net10.0
• Two GitHub Copilot execution modes:
  • shared session with preserved conversation context
  • factory mode with a fresh session per task
• Rx-based streaming model for reasoning, content, tool calls, media, and usage updates
• Central package management with Directory.Packages.props

Installation

dotnet add package OpenHub.Agents.Abstractions
dotnet add package OpenHub.Agents.AIAgent
dotnet add package OpenHub.Agents.GitHubCopilot

Install only the packages you need:

• OpenHub.Agents.Abstractions for contracts and models
• OpenHub.Agents.AIAgent when you want to adapt Microsoft.Agents.AI.AIAgent
• OpenHub.Agents.GitHubCopilot when you want GitHub Copilot integration

Projects

Dependencies Explained

Runtime and core packages

Testing and tooling packages

Build and test

dotnet build OpenHub.Agents.slnx
dotnet test tests\OpenHub.Agents.Tests\OpenHub.Agents.Tests.csproj

Quick Start

Wrap an AIAgent

ITaskAgent taskAgent = chatClient
 .AsAIAgent(options)
 .AsTaskAgent();

CreateTaskResponse response = await taskAgent.CreateTaskAsync(new("Summarize this repo."));

using IDisposable contentSubscription = response.Subscriber.TaskContentChunk.Subscribe(chunk =>
{
 Console.Write(chunk.Content);
});

await response.Subscriber.WaitForCompletionAsync();

Wrap GitHub Copilot

await using CopilotClient copilotClient = new();
await copilotClient.StartAsync();

SessionConfig sessionConfig = new()
{
 Streaming = true,
 Model = "claude-sonnet-4.6",
 OnPermissionRequest = PermissionHandler.ApproveAll
};

ITaskAgent factoryAgent = copilotClient.AsTaskAgent(sessionConfig);

GitHub Copilot can be used in two ways:

• CopilotSession.AsTaskAgent(...): reuse one session and preserve conversation state
• CopilotClient.AsTaskAgent(...): create a fresh session per task

Seed a task with history

CreateTaskResponse response = await taskAgent.CreateTaskAsync(
 new("Can you turn that into a checklist?"),
 [
 new TaskHistoryMessage(ChatRole.User, "Summarize this repo."),
 new TaskHistoryMessage(ChatRole.Assistant, "It is a .NET task-agent adapter library.")
 ]);

For GitHub Copilot adapters, explicit history is serialized into a structured prompt because the current SDK does not expose direct arbitrary-turn injection for a fresh session. The original role strings are preserved in that prompt.

Notes

• OpenHub.Agents.GitHubCopilot currently depends on preview package Microsoft.Agents.AI.GitHub.Copilot.
• Package versions are managed centrally via Directory.Packages.props.
• Repository-wide build conventions live in Directory.Build.props and .editorconfig.