このノートブックでは、Microsoft Agent Framework for .NET を使用して、知的な旅行計画エージェントを構築する方法を紹介します。このエージェントは、世界中のランダムな目的地に対して、個別にカスタマイズされた日帰り旅行の旅程を自動生成することができます。
GetRandomDestination() 関数graph LR
A[User Request] --> B[AI Agent]
B --> C[GitHub Models API]
B --> D[GetRandomDestination Tool]
C --> E[Travel Itinerary]
D --> E
# zsh/bash
export GH_TOKEN=<your_github_token>
export GH_ENDPOINT=https://models.github.ai/inference
export GH_MODEL_ID=openai/gpt-5-mini
# PowerShell
$env:GH_TOKEN = "<your_github_token>"
$env:GH_ENDPOINT = "https://models.github.ai/inference"
$env:GH_MODEL_ID = "openai/gpt-5-mini"
コード例を実行するには、
# zsh/bash
chmod +x ./01-dotnet-agent-framework.cs
./01-dotnet-agent-framework.cs
または、dotnet CLI を使用して:
dotnet run ./01-dotnet-agent-framework.cs
完全なコードは 01-dotnet-agent-framework.cs を参照してください。
#!/usr/bin/dotnet run
#:package Microsoft.Extensions.AI@9.*
#:package Microsoft.Agents.AI.OpenAI@1.*-*
using System.ClientModel;
using System.ComponentModel;
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
using OpenAI;
// Tool Function: Random Destination Generator
// This static method will be available to the agent as a callable tool
// The [Description] attribute helps the AI understand when to use this function
// This demonstrates how to create custom tools for AI agents
[Description("Provides a random vacation destination.")]
static string GetRandomDestination()
{
// List of popular vacation destinations around the world
// The agent will randomly select from these options
var destinations = new List<string>
{
"Paris, France",
"Tokyo, Japan",
"New York City, USA",
"Sydney, Australia",
"Rome, Italy",
"Barcelona, Spain",
"Cape Town, South Africa",
"Rio de Janeiro, Brazil",
"Bangkok, Thailand",
"Vancouver, Canada"
};
// Generate random index and return selected destination
// Uses System.Random for simple random selection
var random = new Random();
int index = random.Next(destinations.Count);
return destinations[index];
}
// Extract configuration from environment variables
// Retrieve the GitHub Models API endpoint, defaults to https://models.github.ai/inference if not specified
// Retrieve the model ID, defaults to openai/gpt-5-mini if not specified
// Retrieve the GitHub token for authentication, throws exception if not specified
var github_endpoint = Environment.GetEnvironmentVariable("GH_ENDPOINT") ?? "https://models.github.ai/inference";
var github_model_id = Environment.GetEnvironmentVariable("GH_MODEL_ID") ?? "openai/gpt-5-mini";
var github_token = Environment.GetEnvironmentVariable("GH_TOKEN") ?? throw new InvalidOperationException("GH_TOKEN is not set.");
// Configure OpenAI Client Options
// Create configuration options to point to GitHub Models endpoint
// This redirects OpenAI client calls to GitHub's model inference service
var openAIOptions = new OpenAIClientOptions()
{
Endpoint = new Uri(github_endpoint)
};
// Initialize OpenAI Client with GitHub Models Configuration
// Create OpenAI client using GitHub token for authentication
// Configure it to use GitHub Models endpoint instead of OpenAI directly
var openAIClient = new OpenAIClient(new ApiKeyCredential(github_token), openAIOptions);
// Create AI Agent with Travel Planning Capabilities
// Initialize OpenAI client, get chat client for specified model, and create AI agent
// Configure agent with travel planning instructions and random destination tool
// The agent can now plan trips using the GetRandomDestination function
AIAgent agent = openAIClient
.GetChatClient(github_model_id)
.CreateAIAgent(
instructions: "You are a helpful AI Agent that can help plan vacations for customers at random destinations",
tools: [AIFunctionFactory.Create(GetRandomDestination)]
);
// Execute Agent: Plan a Day Trip
// Run the agent with streaming enabled for real-time response display
// Shows the agent's thinking and response as it generates the content
// Provides better user experience with immediate feedback
await foreach (var update in agent.RunStreamingAsync("Plan me a day trip"))
{
await Task.Delay(10);
Console.Write(update);
}
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