Moving the copilot-sdk cookbook content in here

cookbook/copilot-sdk/dotnet/recipe/pr-visualization.cs

@@ -0,0 +1,204 @@
+#:package GitHub.Copilot.SDK@*
+#:property PublishAot=false
+
+using System.Diagnostics;
+using GitHub.Copilot.SDK;
+
+// ============================================================================
+// Git & GitHub Detection
+// ============================================================================
+
+bool IsGitRepo()
+{
+    try
+    {
+        var proc = Process.Start(new ProcessStartInfo
+        {
+            FileName = "git",
+            Arguments = "rev-parse --git-dir",
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true
+        });
+        proc?.WaitForExit();
+        return proc?.ExitCode == 0;
+    }
+    catch
+    {
+        return false;
+    }
+}
+
+string? GetGitHubRemote()
+{
+    try
+    {
+        var proc = Process.Start(new ProcessStartInfo
+        {
+            FileName = "git",
+            Arguments = "remote get-url origin",
+            RedirectStandardOutput = true,
+            UseShellExecute = false,
+            CreateNoWindow = true
+        });
+
+        var remoteUrl = proc?.StandardOutput.ReadToEnd().Trim();
+        proc?.WaitForExit();
+
+        if (string.IsNullOrEmpty(remoteUrl)) return null;
+
+        // Handle SSH: git@github.com:owner/repo.git
+        var sshMatch = System.Text.RegularExpressions.Regex.Match(
+            remoteUrl, @"git@github\.com:(.+/.+?)(?:\.git)?$");
+        if (sshMatch.Success) return sshMatch.Groups[1].Value;
+
+        // Handle HTTPS: https://github.com/owner/repo.git
+        var httpsMatch = System.Text.RegularExpressions.Regex.Match(
+            remoteUrl, @"https://github\.com/(.+/.+?)(?:\.git)?$");
+        if (httpsMatch.Success) return httpsMatch.Groups[1].Value;
+
+        return null;
+    }
+    catch
+    {
+        return null;
+    }
+}
+
+string? ParseRepoArg(string[] args)
+{
+    var repoIndex = Array.IndexOf(args, "--repo");
+    if (repoIndex != -1 && repoIndex + 1 < args.Length)
+    {
+        return args[repoIndex + 1];
+    }
+    return null;
+}
+
+string PromptForRepo()
+{
+    Console.Write("Enter GitHub repo (owner/repo): ");
+    return Console.ReadLine()?.Trim() ?? "";
+}
+
+// ============================================================================
+// Main Application
+// ============================================================================
+
+Console.WriteLine("🔍 PR Age Chart Generator\n");
+
+// Determine the repository
+var repo = ParseRepoArg(args);
+
+if (!string.IsNullOrEmpty(repo))
+{
+    Console.WriteLine($"📦 Using specified repo: {repo}");
+}
+else if (IsGitRepo())
+{
+    var detected = GetGitHubRemote();
+    if (detected != null)
+    {
+        repo = detected;
+        Console.WriteLine($"📦 Detected GitHub repo: {repo}");
+    }
+    else
+    {
+        Console.WriteLine("⚠️  Git repo found but no GitHub remote detected.");
+        repo = PromptForRepo();
+    }
+}
+else
+{
+    Console.WriteLine("📁 Not in a git repository.");
+    repo = PromptForRepo();
+}
+
+if (string.IsNullOrEmpty(repo) || !repo.Contains('/'))
+{
+    Console.WriteLine("❌ Invalid repo format. Expected: owner/repo");
+    return;
+}
+
+var parts = repo.Split('/');
+var owner = parts[0];
+var repoName = parts[1];
+
+// Create Copilot client - no custom tools needed!
+await using var client = new CopilotClient(new CopilotClientOptions { LogLevel = "error" });
+await client.StartAsync();
+
+var session = await client.CreateSessionAsync(new SessionConfig
+{
+    Model = "gpt-5",
+    SystemMessage = new SystemMessageConfig
+    {
+        Content = $"""
+<context>
+You are analyzing pull requests for the GitHub repository: {owner}/{repoName}
+The current working directory is: {Environment.CurrentDirectory}
+</context>
+
+<instructions>
+- Use the GitHub MCP Server tools to fetch PR data
+- Use your file and code execution tools to generate charts
+- Save any generated images to the current working directory
+- Be concise in your responses
+</instructions>
+"""
+    }
+});
+
+// Set up event handling
+session.On(evt =>
+{
+    switch (evt)
+    {
+        case AssistantMessageEvent msg:
+            Console.WriteLine($"\n🤖 {msg.Data.Content}\n");
+            break;
+        case ToolExecutionStartEvent toolStart:
+            Console.WriteLine($"  ⚙️  {toolStart.Data.ToolName}");
+            break;
+    }
+});
+
+// Initial prompt - let Copilot figure out the details
+Console.WriteLine("\n📊 Starting analysis...\n");
+
+await session.SendAsync(new MessageOptions
+{
+    Prompt = $"""
+      Fetch the open pull requests for {owner}/{repoName} from the last week.
+      Calculate the age of each PR in days.
+      Then generate a bar chart image showing the distribution of PR ages
+      (group them into sensible buckets like <1 day, 1-3 days, etc.).
+      Save the chart as "pr-age-chart.png" in the current directory.
+      Finally, summarize the PR health - average age, oldest PR, and how many might be considered stale.
+    """
+});
+
+// Interactive loop
+Console.WriteLine("\n💡 Ask follow-up questions or type \"exit\" to quit.\n");
+Console.WriteLine("Examples:");
+Console.WriteLine("  - \"Expand to the last month\"");
+Console.WriteLine("  - \"Show me the 5 oldest PRs\"");
+Console.WriteLine("  - \"Generate a pie chart instead\"");
+Console.WriteLine("  - \"Group by author instead of age\"");
+Console.WriteLine();
+
+while (true)
+{
+    Console.Write("You: ");
+    var input = Console.ReadLine()?.Trim();
+
+    if (string.IsNullOrEmpty(input)) continue;
+    if (input.ToLower() is "exit" or "quit")
+    {
+        Console.WriteLine("👋 Goodbye!");
+        break;
+    }
+
+    await session.SendAsync(new MessageOptions { Prompt = input });
+}