import type { PriorDecisionLink } from '../../types/prior-decisions.js';
/**
 * Produce a YAML priorDecisions block suitable for embedding in spec frontmatter.
 *
 * Returns empty string when the array is empty so callers can omit the field
 * entirely (Acceptance Criterion 4).
 *
 * Example output (non-empty):
 * ```yaml
 * priorDecisions:
 *   - id: DEC-123
 *     title: "Use JWT over sessions"
 *     relevance: 0.85
 * ```
 */
export declare function formatPriorDecisions(links: PriorDecisionLink[]): string;
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