| Argument     | Type        | Default        | Description                                                                          |
| ------------ | ----------- | -------------- | ------------------------------------------------------------------------------------ |
| `data`       | `str`       | required       | Path to directory containing target images for annotation or segmentation.           |
| `det_model`  | `str`       | `'yolo26x.pt'` | YOLO detection model path for initial object detection.                              |
| `sam_model`  | `str`       | `'sam_b.pt'`   | SAM model path for segmentation (supports SAM, SAM 2, MobileSAM, and SAM 3 weights). |
| `device`     | `str`       | `''`           | Computation device (e.g., 'cuda:0', 'cpu', or '' for automatic device detection).    |
| `conf`       | `float`     | `0.25`         | YOLO detection confidence threshold for filtering weak detections.                   |
| `iou`        | `float`     | `0.45`         | IoU threshold for Non-Maximum Suppression to filter overlapping boxes.               |
| `imgsz`      | `int`       | `640`          | Input size for resizing images (must be multiple of 32).                             |
| `max_det`    | `int`       | `300`          | Maximum number of detections per image for memory efficiency.                        |
| `classes`    | `list[int]` | `None`         | List of class indices to detect (e.g., `[0, 1]` for person & bicycle).               |
| `output_dir` | `str`       | `None`         | Save directory for annotations (default: `<data>_auto_annotate_labels` sibling).     |
