/**
 * Action type definitions.
 *
 * Actions are serializable commands that the prefab renderer executes
 * client-side (setState, showToast) or via MCP transport (callTool).
 */
/** Serialized action JSON */
export interface ActionJSON {
    action: string;
    [key: string]: unknown;
}
/** Base interface all actions implement */
export interface Action {
    toJSON(): ActionJSON;
}
/** Serialize one or more actions to their JSON form. */
export declare function serializeCallbacks(actions: Action | Action[]): ActionJSON | ActionJSON[];
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