export declare const stringOption: (probe: string, options: Record<string, unknown>, name: string, fallback?: string) => string;
export declare const stringsOption: (options: Record<string, unknown>, name: string, fallback: string[]) => string[];
export declare const numberOption: (options: Record<string, unknown>, name: string, fallback: number) => number;
export declare const flagOption: (options: Record<string, unknown>, name: string, fallback: boolean) => boolean;
export declare const requireStrings: (probe: string, options: Record<string, unknown>, name: string) => string[];
export declare const requireNumber: (probe: string, options: Record<string, unknown>, name: string) => number;
/** `g` is left out: a shared `g` regex carries `lastIndex` between calls and silently skips half a page. */
export declare const patternFlags: (probe: string, options: Record<string, unknown>) => string;
/** Compiled at the top of the run so a typo is a refusal naming the pattern, not a crash inside a page evaluation. */
export declare const assertPatterns: (probe: string, patterns: string[], flags: string) => void;