/**
 * Shared cosine similarity utility.
 *
 * Previously duplicated in 5 independent implementations:
 *   - memory/intelligence.ts (ReasoningBank.cosineSim)
 *   - mcp-tools/neural-tools.ts (cosineSimilarity)
 *   - mcp-tools/embeddings-tools.ts (cosineSimilarity)
 *   - mcp-tools/coherence/types.ts + coherence-check.ts (both since deleted
 *     along with the rest of the uncalled coherence_* family)
 *
 * This is the single canonical implementation. Accepts number[] or
 * Float32Array. Handles dimension mismatches gracefully (uses the shorter
 * length) and returns 0 for zero-magnitude vectors.
 */
/**
 * Compute cosine similarity between two vectors.
 *
 * Returns a value in [-1, 1]. Returns 0 when either vector is empty or
 * has zero magnitude.
 */
export declare function cosineSimilarity(a: number[] | Float32Array, b: number[] | Float32Array): number;
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