/**
 * Extract a `base_model:` value from a README's YAML frontmatter, or null.
 * Handles a single-string value or an array (returns the first entry).
 */
export declare function extractBaseModel(readme: string): string | null;
/**
 * Detect the model's primary language from YAML frontmatter `language:` or
 * (failing that) the model id's `-en-` / `-zh-` / `_ja` style suffix.
 * Returns ISO 639-1 code ('en', 'zh', 'ja', 'fa', 'ru', etc.) or null when
 * the model is multilingual or the language is undeclared.
 */
export declare function detectModelLanguage(readme: string | null, modelId: string): string | null;
/**
 * Map an ISO 639 language code to its dominant script class. Multi-script
 * languages (Japanese mixes kana + kanji — both treated as 'cjk' here)
 * collapse to the broadest family. Returns null for languages we don't
 * have a mapping for (the language filter then no-ops).
 */
export declare function languageToScript(lang: string): string | null;
/**
 * Classify a candidate prefix string by dominant script. Used to filter
 * README-fingerprinted prefixes against the model's declared language —
 * fixes BGE-en picking the Chinese prefix because the EN+ZH README
 * documents both side-by-side and ZH appears more often.
 */
export declare function detectPrefixScript(prefix: string): string;
/**
 * Fingerprint a README for query/document prefixes. Generic — counts quoted
 * candidate strings and ranks by frequency + presence of query/instruction
 * keywords. When `expectedScript` is set (i.e. the model declares a single
 * language), candidates with a non-matching script are dropped first.
 */
export declare function resolvePromptsFromReadme(readme: string, expectedScript?: string | null): {
    query: string | null;
    document: string | null;
};