/**
 * Stimulus name suffixing — generates unique names for matrix-expanded stimuli.
 */
import type { ResolvedParamSet } from "./types.js";
/**
 * Generate a stimulus name suffix for a given param combination.
 *
 * If `template` is provided, interpolates `${KEY}` references in it.
 * Otherwise, auto-generates a suffix from all expanding param values.
 *
 * @param combination - The resolved param values for this matrix cell
 * @param expandingParams - Param names that participate in expansion (arrays)
 * @param template - Optional user-provided name_suffix template
 * @returns The suffix string (e.g. ` [MODEL=gpt-4o, TIMEOUT=1m]`)
 */
export declare function generateSuffix(combination: ResolvedParamSet, expandingParams: string[], template?: string): string;
/**
 * Validate that stimulus names are unique after expansion.
 * Throws if duplicates are detected.
 */
export declare function validateUniqueNames(names: string[]): void;
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