diff --git a/internal/recipe/runner.go b/internal/recipe/runner.go
index 034834e..9eb3791 100644
--- a/internal/recipe/runner.go
+++ b/internal/recipe/runner.go
@@ -211,12 +211,23 @@ func createUnifiedPatch(changes []FileChange, patchPath string) error {
 	if err != nil {
 		return err
 	}
-	defer f.Close()
+	defer func(f *os.File) {
+		err := f.Close()
+		if err != nil {
+			return
+		}
+	}(f)
 
 	for _, ch := range changes {
-		fmt.Fprintf(f, "--- %s\n+++ %s\n@@ -0,0 +1,%d @@\n", ch.File, ch.File, strings.Count(ch.Content, "\n")+1)
+		_, err := fmt.Fprintf(f, "--- %s\n+++ %s\n@@ -0,0 +1,%d @@\n", ch.File, ch.File, strings.Count(ch.Content, "\n")+1)
+		if err != nil {
+			return err
+		}
 		for _, line := range strings.Split(ch.Content, "\n") {
-			fmt.Fprintf(f, "+%s\n", line)
+			_, err := fmt.Fprintf(f, "+%s\n", line)
+			if err != nil {
+				return err
+			}
 		}
 	}
 	return nil