class KnowledgeRuntimeConfig:
    DEFAULT_ROUTES = {
        "basic_explain": ("fin_basic_collection", 5),
        "faq": ("fin_faq_collection", 3),
        "product_inquiry": ("fin_product_collection", 5),
        "policy_explain": ("fin_policy_collection", 5),
    }

    def __init__(self, *, vector_dim: int = 1024, similarity_threshold: float = 0.60) -> None:
        self.routes = dict(self.DEFAULT_ROUTES)
        self.vector_dim = vector_dim
        self.similarity_threshold = similarity_threshold

    def route(self, intent: str) -> tuple[str, int] | None:
        """Return the collection route used by the retrieval compatibility layer."""
        return self.routes.get(intent)