import { type EmbeddingModel } from "ai";
/** Generate a vector embedding for the given text, returning null on failure. */
export declare function generateEmbedding(model: EmbeddingModel, text: string): Promise<number[] | null>;
/** Compute cosine similarity between two equal-length vectors. */
export declare function cosineSimilarity(a: number[], b: number[]): number;
/** Concatenate observation title, narrative, and concepts into embeddable text. */
export declare function prepareObservationText(obs: {
    title: string;
    narrative: string;
    concepts: string[];
}): string;
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