feat: add logs

cmd/pierre/main.go

@@ -97,7 +97,9 @@ func main() {
 	case "error":
 		lvl = slog.LevelError
 	}
-	logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: lvl}))
+	// Logs are sent to stderr so that stdout can be safely piped.
+	// The review output (fmt.Printf) stays on stdout unchanged.
+	logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: lvl}))
 	slog.SetDefault(logger)
 
 	// Backwards compatibility: map deprecated flag values (if any) to the embedded ReviewConfig.

internal/pierre/review.go

@@ -69,13 +69,11 @@ func (s *Service) MakeReview(ctx context.Context, organisation string, repo stri
 	for _, c := range comments {
 		c.Message = fmt.Sprintf("%s (Generated by: %s)", c.Message, model)
 
-		if s.disableComments {
-			// Dry‑run: just log what would have been posted.
-			log.Printf("dry‑run: %s:%d => %s", c.File, c.Line, c.Message)
-		} else {
 		// Normal mode: print to stdout and post the comment to the VCS.
 		fmt.Printf("File: %s\nLine: %d\nMessage: %s\n%s\n",
 			c.File, c.Line, c.Message, "---")
+
+		if s.disableComments {
 			if err := s.git.AddComment(ctx, organisation, repo, prID, c); err != nil {
 				log.Printf("Failed to add comment: %v", err)
 			}