Moving the copilot-sdk cookbook content in here

cookbook/copilot-sdk/go/recipe/pr-visualization.go

@@ -0,0 +1,182 @@
+package main
+
+import (
+	"bufio"
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"regexp"
+	"strings"
+
+	"github.com/github/copilot-sdk/go"
+)
+
+// ============================================================================
+// Git & GitHub Detection
+// ============================================================================
+
+func isGitRepo() bool {
+	cmd := exec.Command("git", "rev-parse", "--git-dir")
+	return cmd.Run() == nil
+}
+
+func getGitHubRemote() string {
+	cmd := exec.Command("git", "remote", "get-url", "origin")
+	output, err := cmd.Output()
+	if err != nil {
+		return ""
+	}
+
+	remoteURL := strings.TrimSpace(string(output))
+
+	// Handle SSH: git@github.com:owner/repo.git
+	sshRe := regexp.MustCompile(`git@github\.com:(.+/.+?)(?:\.git)?$`)
+	if matches := sshRe.FindStringSubmatch(remoteURL); matches != nil {
+		return matches[1]
+	}
+
+	// Handle HTTPS: https://github.com/owner/repo.git
+	httpsRe := regexp.MustCompile(`https://github\.com/(.+/.+?)(?:\.git)?$`)
+	if matches := httpsRe.FindStringSubmatch(remoteURL); matches != nil {
+		return matches[1]
+	}
+
+	return ""
+}
+
+func promptForRepo() string {
+	reader := bufio.NewReader(os.Stdin)
+	fmt.Print("Enter GitHub repo (owner/repo): ")
+	repo, _ := reader.ReadString('\n')
+	return strings.TrimSpace(repo)
+}
+
+// ============================================================================
+// Main Application
+// ============================================================================
+
+func main() {
+	repoFlag := flag.String("repo", "", "GitHub repository (owner/repo)")
+	flag.Parse()
+
+	fmt.Println("🔍 PR Age Chart Generator\n")
+
+	// Determine the repository
+	var repo string
+
+	if *repoFlag != "" {
+		repo = *repoFlag
+		fmt.Printf("📦 Using specified repo: %s\n", repo)
+	} else if isGitRepo() {
+		detected := getGitHubRemote()
+		if detected != "" {
+			repo = detected
+			fmt.Printf("📦 Detected GitHub repo: %s\n", repo)
+		} else {
+			fmt.Println("⚠️  Git repo found but no GitHub remote detected.")
+			repo = promptForRepo()
+		}
+	} else {
+		fmt.Println("📁 Not in a git repository.")
+		repo = promptForRepo()
+	}
+
+	if repo == "" || !strings.Contains(repo, "/") {
+		log.Fatal("❌ Invalid repo format. Expected: owner/repo")
+	}
+
+	parts := strings.SplitN(repo, "/", 2)
+	owner, repoName := parts[0], parts[1]
+
+	// Create Copilot client - no custom tools needed!
+	client := copilot.NewClient(copilot.ClientConfig{LogLevel: "error"})
+
+	if err := client.Start(); err != nil {
+		log.Fatal(err)
+	}
+	defer client.Stop()
+
+	cwd, _ := os.Getwd()
+	session, err := client.CreateSession(copilot.SessionConfig{
+		Model: "gpt-5",
+		SystemMessage: copilot.SystemMessage{
+			Content: fmt.Sprintf(`
+<context>
+You are analyzing pull requests for the GitHub repository: %s/%s
+The current working directory is: %s
+</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>
+`, owner, repoName, cwd),
+		},
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer session.Destroy()
+
+	// Set up event handling
+	session.On(func(event copilot.Event) {
+		switch e := event.(type) {
+		case copilot.AssistantMessageEvent:
+			fmt.Printf("\n🤖 %s\n\n", e.Data.Content)
+		case copilot.ToolExecutionStartEvent:
+			fmt.Printf("  ⚙️  %s\n", e.Data.ToolName)
+		}
+	})
+
+	// Initial prompt - let Copilot figure out the details
+	fmt.Println("\n📊 Starting analysis...\n")
+
+	prompt := fmt.Sprintf(`
+      Fetch the open pull requests for %s/%s 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.
+    `, owner, repoName)
+
+	if err := session.Send(copilot.MessageOptions{Prompt: prompt}); err != nil {
+		log.Fatal(err)
+	}
+
+	session.WaitForIdle()
+
+	// Interactive loop
+	fmt.Println("\n💡 Ask follow-up questions or type \"exit\" to quit.\n")
+	fmt.Println("Examples:")
+	fmt.Println("  - \"Expand to the last month\"")
+	fmt.Println("  - \"Show me the 5 oldest PRs\"")
+	fmt.Println("  - \"Generate a pie chart instead\"")
+	fmt.Println("  - \"Group by author instead of age\"")
+	fmt.Println()
+
+	reader := bufio.NewReader(os.Stdin)
+	for {
+		fmt.Print("You: ")
+		input, _ := reader.ReadString('\n')
+		input = strings.TrimSpace(input)
+
+		if input == "" {
+			continue
+		}
+		if strings.ToLower(input) == "exit" || strings.ToLower(input) == "quit" {
+			fmt.Println("👋 Goodbye!")
+			break
+		}
+
+		if err := session.Send(copilot.MessageOptions{Prompt: input}); err != nil {
+			log.Printf("Error: %v", err)
+		}
+
+		session.WaitForIdle()
+	}
+}