type Counter = {
    name: string;
    help?: string;
    values: Map<string, number>;
};
type Histogram = {
    name: string;
    help?: string;
    buckets: number[];
    counts: Map<string, number[]>;
    sum: Map<string, number>;
};
export declare function counter(name: string, help?: string): Counter;
export declare function histogram(name: string, buckets: number[], help?: string): Histogram;
export declare function inc(c: Counter, labels?: Record<string, string | number | boolean>, value?: number): void;
export declare function observe(h: Histogram, val: number, labels?: Record<string, string | number | boolean>): void;
export declare function recordHttpRequest(labels: {
    method: string;
    route: string;
    status: number;
}): void;
export declare function recordHttpDuration(ms: number, labels: {
    method: string;
    route: string;
    status: number;
}): void;
export declare function recordCacheHit(labels: {
    route: string;
}): void;
export declare function recordCacheMiss(labels: {
    route: string;
}): void;
export declare function recordSemanticSearch(labels: {
    query_type: string;
    similarity_threshold: number;
}): void;
export declare function recordSemanticSearchDuration(ms: number, labels: {
    query_type: string;
    matches_found: number;
}): void;
export declare function recordVectorSimilarityScore(score: number, labels: {
    query_type: string;
}): void;
export declare function recordLLMResponseStored(labels: {
    responses_count: number;
    variant_strategy?: string;
}): void;
export declare function recordResponseSelection(labels: {
    strategy: string;
    variants_count: number;
}): void;
export declare function recordCacheEntryCount(count: number): void;
export declare function renderPrometheus(): string;
export {};
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