import json

def simulate_lisp_to_schema(fn_name, params, docstring):
    """
    Simulates the transformation of a Lisp signature to Gemini JSON Tool Schema.
    """
    schema = {
        "name": fn_name.lower().replace("-", "_"),
        "description": docstring,
        "parameters": {
            "type": "object",
            "properties": {
                p: {"type": "string"} for p in params
            },
            "required": params
        }
    }
    return schema

if __name__ == "__main__":
    print("--- Test: Lisp to Gemini Schema ---")
    
    fn = "scaffold-project"
    params = ["name", "type"]
    doc = "Physically creates the material PSF project."
    
    expected_name = "scaffold_project"
    
    result = simulate_lisp_to_schema(fn, params, doc)
    print(json.dumps(result, indent=2))
    
    status = "PASS" if result["name"] == expected_name and "parameters" in result else "FAIL"
    print(f"\nStatus: {status}")