export declare const HYPERCHART_COMMAND_EVENT = "hyperchart:command";
export interface HyperchartCommandRequest {
    args: string;
    claim(run: () => void | Promise<void>): boolean;
}
export interface HyperchartCommandEventBus {
    emit(event: string, payload: unknown): void;
}
/**
 * Request command execution from the loaded pi-hyperchart extension.
 * Listeners must claim synchronously; command work may remain asynchronous.
 */
export declare function requestHyperchartCommand(events: HyperchartCommandEventBus, args: string): Promise<boolean>;
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