/**
 * Compact Vigilbase flare mark + wordmark for human CLI surfaces.
 * Static strings only — no I/O, no deps, skipped entirely in --json mode.
 */
/**
 * Compact square Vigilbase flare (inverted V).
 * Left wing (full block) = terminal default fg; right wing (medium shade) = brand yellow.
 */
/** Compact flare used on help/version (keeps the first viewport short). */
export declare const VIGILBASE_ASCII_MARK: string;
export type BannerOptions = {
    /** Include version line under the mark. */
    version?: string;
    /** One-line tagline. */
    tagline?: string;
    /** Force ANSI on/off. Default: auto from TTY + env. */
    useColor?: boolean;
};
export declare function shouldUseColor(stream: {
    isTTY?: boolean;
} | undefined, env?: NodeJS.ProcessEnv): boolean;
export declare function shouldShowBanner(mode?: 'text' | 'json', env?: NodeJS.ProcessEnv): boolean;
/**
 * Banner composition (flare + wordmark + tagline).
 */
export declare function renderBanner(options?: BannerOptions, stream?: {
    isTTY?: boolean;
} | undefined, env?: NodeJS.ProcessEnv): string;