import type { ScannedConventions } from '../types/index.js';
/**
 * Appends stack-specific acceptance criteria to an existing list.
 * Based on language, testRunner, testLocation, errorHandling, and lintBaseline.
 * Gracefully skips any field with value 'unknown' or null.
 */
export declare function injectConventionCriteria(criteria: string[], conventions: ScannedConventions): string[];
/**
 * Builds a YAML block string summarising the detected conventions.
 * Only includes fields that are not 'unknown' or null.
 */
export declare function buildConventionsFrontmatter(conventions: ScannedConventions): string;
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