Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

cookbook/copilot-sdk/go/recipe/ralph-loop.go

@@ -39,7 +39,10 @@ func ralphLoop(ctx context.Context, mode string, maxIterations int) error {
 	}
 	defer client.Stop()
 
-	cwd, _ := os.Getwd()
+	cwd, err := os.Getwd()
+	if err != nil {
+		return fmt.Errorf("failed to get working directory: %w", err)
+	}
 
 	fmt.Println(strings.Repeat("━", 40))
 	fmt.Printf("Mode:   %s\n", mode)
@@ -76,7 +79,9 @@ func ralphLoop(ctx context.Context, mode string, maxIterations int) error {
 		_, err = session.SendAndWait(ctx, copilot.MessageOptions{
 			Prompt: string(prompt),
 		})
-		session.Destroy()
+		if destroyErr := session.Destroy(); destroyErr != nil {
+			log.Printf("failed to destroy session on iteration %d: %v", i, destroyErr)
+		}
 		if err != nil {
 			return fmt.Errorf("send failed on iteration %d: %w", i, err)
 		}

cookbook/copilot-sdk/nodejs/ralph-loop.md

@@ -5,8 +5,8 @@ Build autonomous coding loops where an AI agent picks tasks, implements them, va
 > **Runnable example:** [recipe/ralph-loop.ts](recipe/ralph-loop.ts)
 >
 > ```bash
-> cd recipe && npm install
-> npx tsx ralph-loop.ts
+> npm install
+> npx tsx recipe/ralph-loop.ts
 > ```
 
 ## What is a Ralph Loop?

cookbook/copilot-sdk/python/ralph-loop.md

@@ -4,10 +4,14 @@ Build autonomous coding loops where an AI agent picks tasks, implements them, va
 
 > **Runnable example:** [recipe/ralph_loop.py](recipe/ralph_loop.py)
 >
+> From the repository root, install dependencies and run:
+>
 > ```bash
-> cd recipe && pip install -r requirements.txt
-> python ralph_loop.py
+> pip install -r cookbook/copilot-sdk/python/recipe/requirements.txt
+> python cookbook/copilot-sdk/python/recipe/ralph_loop.py
 > ```
+>
+> Make sure `PROMPT_build.md` and `PROMPT_plan.md` exist in your current working directory before running the loop.
 
 ## What is a Ralph Loop?
 

cookbook/copilot-sdk/python/recipe/ralph_loop.py

@@ -55,11 +55,11 @@ async def ralph_loop(mode: str = "build", max_iterations: int = 50):
             ))
 
             # Log tool usage for visibility
-            session.on(lambda event:
-                print(f"  ⚙ {event.data.tool_name}")
-                if event.type.value == "tool.execution_start" else None
-            )
+            def log_tool_event(event):
+                if event.type.value == "tool.execution_start":
+                    print(f"  ⚙ {event.data.tool_name}")
 
+            session.on(log_tool_event)
             try:
                 await session.send_and_wait(
                     MessageOptions(prompt=prompt), timeout=600