/**
 * Commit message language resolution.
 *
 * Commit messages are written by the LLM, so "language support" is a
 * display-name resolution plus a cheap script heuristic for conversations
 * where the user never set `lang`. Only user messages are considered — the
 * assistant may write in a different language than the user speaks.
 * Latin-script languages (English, French, German, ...) are undetectable by
 * script and fall back to English.
 */
/**
 * Display name for a `lang` value: known codes map to their name, anything
 * else (a language name in any language) passes through verbatim for the
 * LLM to interpret.
 */
export declare function languageName(lang: string): string;
/**
 * Detect the conversation language from user message texts by script.
 *
 * Returns a `lang` code for the first message with a distinctive script,
 * or `undefined` when none matches. Order matters: kana is checked before
 * han so Japanese text (which mixes kanji with kana) is classified as
 * Japanese, not Chinese.
 */
export declare function detectLanguage(userTexts: ReadonlyArray<string>): string | undefined;
/**
 * Extract text from user-role messages (structural type, no pi imports).
 * The user-side counterpart of `extractAssistantContext`.
 */
export declare function userMessageTexts(messages: ReadonlyArray<unknown>): string[];
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