Adding fix to aligner

gnommo/cli.py

@@ -744,12 +744,14 @@ def _generate_slides_json(directory: Path, verbose: bool) -> None:
     # Sort by slide number
     sorted_slides = dict(sorted(slides.items(), key=lambda x: int(x[0][1:])))
 
-    # Write slides.json
+    # Write slides.json only if content changed
     output_path = directory / "slides.json"
-    with open(output_path, "w", encoding="utf-8") as f:
-        json.dump(sorted_slides, f, indent=2)
-
-    print(f"  Generated {output_path} ({len(sorted_slides)} slides)")
+    new_content = json.dumps(sorted_slides, indent=2)
+    existing_content = output_path.read_text(encoding="utf-8") if output_path.exists() else None
+    if new_content != existing_content:
+        with open(output_path, "w", encoding="utf-8") as f:
+            f.write(new_content)
+        print(f"  Generated {output_path} ({len(sorted_slides)} slides)")
     if verbose:
         for slide_id in sorted_slides:
             print(f"    [{slide_id}]")
@@ -950,9 +952,9 @@ def _import_narration_segments(narration_dir: Path, config, verbose: bool) -> No
         added_count += 1
         print(f"    Added narration segment: {segment_id}  (from raw_mov)")
 
-    # Always write narration.json (creates it if missing)
-    with open(narration_json_path, "w", encoding="utf-8") as f:
-        json.dump(existing_narration, f, indent=2)
+    if added_count > 0 or not narration_json_path.exists():
+        with open(narration_json_path, "w", encoding="utf-8") as f:
+            json.dump(existing_narration, f, indent=2)
 
     if added_count > 0:
         print(f"  Updated narration.json (+{added_count} segments)")