/** Maximum excerpt length in characters, including the trailing ellipsis. */
export declare const REQUIREMENT_EXCERPT_MAX_CHARS: 96;
/**
 * Build a short, redacted, single-line excerpt of an atom's canonical text. Returns `undefined`
 * for empty/whitespace-only input so callers can simply omit the optional field. Deterministic:
 * same input always yields the same excerpt (no timestamps, no randomness).
 */
export declare function buildRequirementExcerpt(canonicalText: string): string | undefined;
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