# Review Comment

- **Author:** coderabbitai[bot]
- **File:** `packages/core/ai_content_pipeline/ai_content_pipeline/cli/commands/motion.py`
- **Line:** 25
- **Date:** 2026-02-07
- **Comment ID:** 2777690075
- **URL:** https://github.com/donghaozhang/video-agent-skill/pull/22#discussion_r2777690075

---

_⚠️ Potential issue_ | _🟠 Major_

<details>
<summary>🧩 Analysis chain</summary>

🏁 Script executed:

```shell
cd packages/core/ai_content_pipeline/ai_content_pipeline/cli/commands && cat -n motion.py | head -50
```

Repository: donghaozhang/video-agent-skill

Length of output: 2246

---



</details>

**Add type hints, Google-style docstring, and remove unused `ctx` parameter.**

The `ctx` parameter is unused in the function body, and the public command lacks required type hints and proper docstring format per coding guidelines (Args, Returns, Cost, Example sections are mandatory).

<details>
<summary>Suggested update</summary>

```diff
+from typing import Optional
+
 `@click.command`("transfer-motion")
 `@click.option`("-i", "--image", required=True, help="Image file path or URL (character/background source)")
 `@click.option`("-v", "--video", required=True, help="Video file path or URL (motion source)")
 `@click.option`("-o", "--output", "output_dir", default="output", help="Output directory")
 `@click.option`("--orientation", default="video",
               type=click.Choice(["video", "image"]),
               help="Character orientation: video (max 30s) or image (max 10s)")
 `@click.option`("--no-sound", is_flag=True, default=False,
               help="Remove audio from output (default: keep sound)")
 `@click.option`("-p", "--prompt", default=None, help="Optional text description to guide generation")
 `@click.option`("--save-json", default=None, help="Save result metadata as JSON file")
-@click.pass_context
-def transfer_motion_cmd(ctx, image, video, output_dir, orientation, no_sound, prompt, save_json):
-    """Transfer motion from video to image (Kling v2.6)."""
+def transfer_motion_cmd(
+    image: str,
+    video: str,
+    output_dir: str,
+    orientation: str,
+    no_sound: bool,
+    prompt: Optional[str],
+    save_json: Optional[str],
+) -> None:
+    """Transfer motion from video to image (Kling v2.6).
+
+    Args:
+        image: Image file path or URL (character/background source).
+        video: Video file path or URL (motion source).
+        output_dir: Output directory.
+        orientation: Character orientation ("video" or "image").
+        no_sound: Whether to remove audio from output.
+        prompt: Optional text description to guide generation.
+        save_json: Optional JSON metadata file name.
+
+    Returns:
+        None.
+
+    Cost:
+        Varies by model and provider.
+
+    Example:
+        $ aicp motion transfer-motion -i image.png -v motion.mp4 -o result_folder/
+    """
```

</details>

<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 Ruff (0.14.14)</summary>

[warning] 24-24: Unused function argument: `ctx`

(ARG001)

</details>

</details>

<details>
<summary>🤖 Prompt for AI Agents</summary>

```
In `@packages/core/ai_content_pipeline/ai_content_pipeline/cli/commands/motion.py`
around lines 23 - 25, The command function transfer_motion_cmd currently accepts
an unused ctx and lacks type hints and a Google-style docstring; remove the
unused ctx parameter (and the `@click.pass_context` decorator), add precise type
hints for all parameters and a return type (e.g., image: str, video: str,
output_dir: str, orientation: str, no_sound: bool, prompt: Optional[str],
save_json: bool) and import typing.Optional if needed, and replace the current
docstring with a Google-style docstring containing Args, Returns, Cost, and
Example sections describing each parameter and that the function returns None.
```

</details>

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