export interface ExpectedUtilityWeights {
    latency: number;
    tokens: number;
    risk: number;
    context: number;
    latencyScaleMs: number;
    tokenScale: number;
    minimumEvidence: number;
    minimumMargin: number;
    highEntropy: number;
}
export declare const DEFAULT_EXPECTED_UTILITY_WEIGHTS: ExpectedUtilityWeights;
export interface ExpectedUtilityCandidate {
    tool: string;
    value: number;
    alpha: number;
    beta: number;
    sampleCount: number;
    latencyMs?: number;
    tokenEstimate?: number;
    riskCost?: number;
    contextCost?: number;
    deterministicMatch?: boolean;
    /** Candidates with unresolved paths may be observed/shortlisted but never recommended. */
    automaticEligible?: boolean;
    /** `no_tool` uses a known probability rather than a learned posterior. */
    successProbability?: number;
}
export interface RankedToolCandidate extends ExpectedUtilityCandidate {
    successProbability: number;
    latencyCost: number;
    tokenCost: number;
    riskCost: number;
    contextCost: number;
    utility: number;
    probability: number;
}
export type ToolSelectionDisposition = "recommend" | "shortlist" | "abstain";
export interface ToolSelectionDecision {
    disposition: ToolSelectionDisposition;
    recommendation?: string;
    shortlist: string[];
    entropy: number;
    margin: number;
    ranked: RankedToolCandidate[];
}
export declare function betaSuccessProbability(alpha: number, beta: number): number;
export declare function normalizedEntropy(probabilities: readonly number[]): number;
export declare function rankExpectedUtilityCandidates(candidates: readonly ExpectedUtilityCandidate[], weights?: ExpectedUtilityWeights): RankedToolCandidate[];
export declare function decideExpectedUtility(candidates: readonly ExpectedUtilityCandidate[], weights?: ExpectedUtilityWeights): ToolSelectionDecision;
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