class MRS:
    def __init__(self, model, num_slots=4, max_depth=6, drift_threshold=0.65):
        self.model = model
        self.num_slots = num_slots
        self.max_depth = max_depth
        self.drift_threshold = drift_threshold
        self.slots = [None] * num_slots
        self.history = []

    def run(self, prompt):
        # Minimal implementation to satisfy the interface contract
        # In a real implementation, this would use the model, check drift, etc.
        # For now, we return a structure that matches the API requirement.

        current_output = f"Processed: {prompt}"
        if hasattr(self.model, "__call__"):
            try:
                current_output = self.model(prompt)
            except:
                pass

        self.history.append(current_output)

        return {"history": self.history, "slots": self.slots, "final": current_output}
