/** Fire-once flags for discoverability elements (ui-usage-dx §6).
 *
 *  Hard rule: every discoverability element renders at most once per user per
 *  deployment, ever — localStorage (origin-scoped, so per-deployment) is the
 *  source of truth, and any degraded environment (SSR, sandboxed iframe,
 *  blocked or full storage) reads as already-seen so it never nags. */
/** The one host-facing discoverability dial (ui-usage-dx §6): `"default"`
 *  keeps the fire-once whisper + greeting-as-tutorial; `"quiet"` disables
 *  both. Contextual affordances (slot ghosts, remix hover, triggers) are
 *  host-placed and untouched by the dial. */
export type VendoDiscoverability = "quiet" | "default";
/** The greeting-as-tutorial content (§6 first-open moment): an agent-voiced
 *  intro line plus 2–3 tappable starter prompts (chips PREFILL the composer,
 *  never send). Hosts supply it via the provider/overlay `greeting` prop —
 *  typically loaded from `.vendo/greeting.json`, which uses this exact shape. */
export interface VendoGreeting {
    intro: string;
    prompts: string[];
}
/** Fallback greeting when the host supplies none: a generic capable intro
 *  whose second prompt is always a molding prompt (the §6 requirement). */
export declare const defaultVendoGreeting: VendoGreeting;
/** Fallback suggestion chips for the VendoSlot empty-state invitation
 *  when the host supplies none — generic
 *  view-authoring starts, white-label like everything else. Hosts should
 *  replace these with host-aware prompts (`.vendo/greeting.json` pipeline). */
export declare const defaultSlotSuggestions: string[];
/** True once the element has fired — or whenever storage cannot answer. */
export declare function hasSeen(element: string): boolean;
/** Record the element as fired. Best-effort: a write that fails stays silent
 *  (the matching hasSeen already reports seen in those environments). */
export declare function markSeen(element: string): void;