Moving the copilot-sdk cookbook content in here

cookbook/copilot-sdk/go/recipe/persisting-sessions.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+    "fmt"
+    "log"
+
+    "github.com/github/copilot-sdk/go"
+)
+
+func main() {
+    client := copilot.NewClient()
+    if err := client.Start(); err != nil {
+        log.Fatal(err)
+    }
+    defer client.Stop()
+
+    // Create session with a memorable ID
+    session, err := client.CreateSession(copilot.SessionConfig{
+        SessionID: "user-123-conversation",
+        Model:     "gpt-5",
+    })
+    if err != nil {
+        log.Fatal(err)
+    }
+
+    if err := session.Send(copilot.MessageOptions{Prompt: "Let's discuss TypeScript generics"}); err != nil {
+        log.Fatal(err)
+    }
+    fmt.Printf("Session created: %s\n", session.SessionID)
+
+    // Destroy session but keep data on disk
+    if err := session.Destroy(); err != nil {
+        log.Fatal(err)
+    }
+    fmt.Println("Session destroyed (state persisted)")
+
+    // Resume the previous session
+    resumed, err := client.ResumeSession("user-123-conversation")
+    if err != nil {
+        log.Fatal(err)
+    }
+    fmt.Printf("Resumed: %s\n", resumed.SessionID)
+
+    if err := resumed.Send(copilot.MessageOptions{Prompt: "What were we discussing?"}); err != nil {
+        log.Fatal(err)
+    }
+
+    // List sessions
+    sessions, err := client.ListSessions()
+    if err != nil {
+        log.Fatal(err)
+    }
+    ids := make([]string, 0, len(sessions))
+    for _, s := range sessions {
+        ids = append(ids, s.SessionID)
+    }
+    fmt.Printf("Sessions: %v\n", ids)
+
+    // Delete session permanently
+    if err := client.DeleteSession("user-123-conversation"); err != nil {
+        log.Fatal(err)
+    }
+    fmt.Println("Session deleted")
+
+    if err := resumed.Destroy(); err != nil {
+        log.Fatal(err)
+    }
+}