import re

def clean_text(text: str):
    """
    Preprocesses text to ensure continuous sentences for AI/NLP models.
    Removes artifacts from PDF extraction and JSON formatting.
    """
    # 1. Handle escaped newlines (common in JSON/API raw inputs)
    text = text.replace("\\n", " ")
    
    # 2. Replace actual newlines with spaces
    # Prevents words from sticking together or breaking context (e.g., "AI\nEngineer" -> "AI Engineer")
    text = text.replace("\n", " ")
    
    # 3. Collapse multiple whitespaces into a single space & trim edges
    text = re.sub(r"\s+", " ", text).strip()

    return text