/**
 * Model routing, exposed as a tool.
 *
 * The report surface for routing: the full table with the numbers in it, plus
 * an at-the-decision note when the caller names the shape of work it is about
 * to do. The stable, number-free half of the same knowledge reaches the model
 * through the session-start briefing, where a changing digit would cost the
 * prompt cache.
 *
 * Advice only. Nothing here switches a model, and nothing here writes to the
 * user's files -- which is what the alternative approach does, at the cost of
 * permanent prefix weight and a staleness guard to stop the advice going off.
 */
export declare function modelRouting(input: {
    shape?: string;
    currentModel?: string;
}): Promise<{
    content: Array<{
        type: string;
        text: string;
    }>;
    isError?: boolean;
}>;
export declare const ROUTING_TOOL: {
    readonly name: "model_routing";
    readonly description: string;
    readonly inputSchema: {
        readonly type: "object";
        readonly properties: {
            readonly shape: {
                readonly type: "string";
                readonly description: "The kind of work about to be done";
            };
            readonly currentModel: {
                readonly type: "string";
                readonly description: "The model in use now, e.g. claude-sonnet-5";
            };
        };
    };
};
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