Register image_gui split in dataset card

README.md

@@ -18,6 +18,8 @@ configs:
     path: data/text.jsonl
   - split: image
     path: data/image.jsonl
+  - split: image_gui
+    path: data/image_gui.jsonl
   - split: video
     path: data/video.jsonl
 ---
@@ -45,8 +47,18 @@ Each row is one trace:
 | `extras` | framework specific metadata |
 
 `task`, `trajectory`, `ground_truth`, and `extras` are JSON strings, so
-`json.loads` them to consume. Image traces embed their images in the
-row; video traces reference frame files under `video_assets/`.
+`json.loads` them to consume. Image and image_gui traces embed their
+images in the row; video traces reference frame files under
+`video_assets/`.
+
+## Splits
+
+- `text`, `image`, `video` — tool-use, chart/search, and video agent
+  traces across single- and multi-agent frameworks.
+- `image_gui` — GUI agent traces with full screenshot observations:
+  `coact` (OSWorld, multi-agent) and `openai_cua` (OSWorld), plus
+  `agentoccam` and `gemini` (WebVoyager). `ground_truth.step` is
+  1-indexed and matches the trajectory's `step_number` directly.
 
 ## Taxonomy