/**
 * AC definition parser: closed grammar over requirements.md (FR1).
 *
 * Accepted forms (dash bullets only; emphasis coupled — unbalanced bold is a
 * near-miss, AC-22/design F13):
 *   - AC-n: text
 *   - **AC-n**: text
 *   - **AC-n:** text
 *   - AC-n (retired YYYY-MM-DD[, superseded by AC-m]): text
 *   - **AC-n** (retired ...): text
 *   - **AC-n (retired ...):** text
 *   - **AC-n (retired ...)**: text
 *
 * Anything AC-shaped that fails the strict grammar warns rather than silently
 * dropping out of required coverage (AC-22).
 *
 * Requirements: traceability-ids/AC-1, AC-2, AC-4, AC-22, AC-23
 */
import type { ParsedRequirements } from './types.js';
/**
 * Parse one requirements.md for AC definitions.
 *
 * @param content - File content (UTF-8).
 * @param instance - Owning instance name, recorded on each definition.
 */
export declare function parseRequirements(content: string, instance: string): ParsedRequirements;
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