# Review Comment

- **Author:** coderabbitai[bot]
- **File:** `packages/providers/fal/image-to-video/fal_image_to_video/models/grok.py`
- **Line:** 35
- **Date:** 2026-01-30
- **Comment ID:** 2744771067
- **URL:** https://github.com/donghaozhang/video-agent-skill/pull/14#discussion_r2744771067

---

_⚠️ Potential issue_ | _🟡 Minor_

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

🏁 Script executed:

```shell
# First, check if file exists and read it
cat -n packages/providers/fal/image-to-video/fal_image_to_video/models/grok.py
```

Repository: donghaozhang/video-agent-skill

Length of output: 5169

---

🏁 Script executed:

```shell
# Run the verification script from the review comment
python - <<'PY'
import ast, pathlib
path = pathlib.Path("packages/providers/fal/image-to-video/fal_image_to_video/models/grok.py")
tree = ast.parse(path.read_text())
for node in ast.walk(tree):
    if isinstance(node, ast.FunctionDef):
        if node.returns is None:
            print(f"Missing return annotation: {node.name} (Line {node.lineno})")
        if node.args.kwarg and node.args.kwarg.annotation is None:
            print(f"Missing **kwargs annotation: {node.name} (Line {node.lineno})")
        # Also check if docstring exists
        docstring = ast.get_docstring(node)
        if docstring is None:
            print(f"Missing docstring: {node.name} (Line {node.lineno})")
        else:
            # Check if docstring contains Cost and Example sections
            if "Cost" not in docstring:
                print(f"Missing Cost section in docstring: {node.name}")
            if "Example" not in docstring:
                print(f"Missing Example section in docstring: {node.name}")
PY
```

Repository: donghaozhang/video-agent-skill

Length of output: 753

---



</details>

**Add missing type hints and complete docstrings for public methods.**

Missing return annotation for `__init__` and untyped `**kwargs` across public methods. All public method docstrings must include Cost and Example sections per project standards.

<details>
<summary>✅ Suggested type-hint updates</summary>

```diff
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__("grok_imagine")

-    def validate_parameters(self, **kwargs) -> Dict[str, Any]:
+    def validate_parameters(self, **kwargs: Any) -> Dict[str, Any]:

-    def prepare_arguments(
-        self,
-        prompt: str,
-        image_url: str,
-        **kwargs
-    ) -> Dict[str, Any]:
+    def prepare_arguments(
+        self,
+        prompt: str,
+        image_url: str,
+        **kwargs: Any
+    ) -> Dict[str, Any]:

-    def estimate_cost(self, duration: int = 6, **kwargs) -> float:
+    def estimate_cost(self, duration: int = 6, **kwargs: Any) -> float:
```
</details>

Applies to lines: 33-35 (`__init__`), 36-77 (`validate_parameters`), 79-103 (`prepare_arguments`), 104-115 (`get_model_info`), 117-132 (`estimate_cost`)

<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

```suggestion
    def __init__(self) -> None:
        super().__init__("grok_imagine")

```

</details>

<!-- suggestion_end -->

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

```
In `@packages/providers/fal/image-to-video/fal_image_to_video/models/grok.py`
around lines 33 - 35, Add explicit type hints and complete docstrings for all
public methods: annotate __init__ with -> None; annotate
validate_parameters(self, params: Mapping[str, Any]) -> Mapping[str, Any] (or
specific return type), prepare_arguments(self, params: Mapping[str, Any]) ->
Dict[str, Any], get_model_info(self) -> Dict[str, Any], and estimate_cost(self,
params: Mapping[str, Any]) -> float (or appropriate numeric type); use typing
imports (Any, Dict, Mapping, Optional) as needed and type **kwargs as **kwargs:
Any where present. Update each public method docstring (validate_parameters,
prepare_arguments, get_model_info, estimate_cost, and __init__) to include
standard sections "Cost:" and "Example:" per project standards, and ensure
parameter and return descriptions are present. Ensure signatures in class
GrokImagine (constructor named __init__) and the methods named
validate_parameters, prepare_arguments, get_model_info, and estimate_cost match
these typed signatures.
```

</details>

<!-- fingerprinting:phantom:medusa:eagle -->

<!-- This is an auto-generated comment by CodeRabbit -->
