import type { Engine } from "@babylonjs/core/Engines/engine.js";
import type { Scene } from "@babylonjs/core/scene.js";
import { type CapabilityAvailability, type RuntimeQualityState, type RuntimeBackendSnapshot, type RuntimeProbeReport } from "@skenora/contracts";
import type { EventPublisher } from "@skenora/events";
import type { RuntimeEventMap } from "../core/runtime-events.js";
export interface RuntimeBackendDiagnosticsOptions {
    readonly engine: Engine;
    readonly scene: Scene;
    readonly events: EventPublisher<RuntimeEventMap>;
    readState(): {
        disposed: boolean;
        contextLost: boolean;
        rendering: boolean;
    };
    getQualityState(): RuntimeQualityState | null;
    getCapabilityAvailability(): readonly CapabilityAvailability[];
}
/** Owns diagnostic evidence only. The engine, scene, and events are borrowed. */
export declare class RuntimeBackendDiagnostics {
    #private;
    constructor(options: RuntimeBackendDiagnosticsOptions);
    /** Serializable observation of the active Babylon backend and device caps. */
    getBackendSnapshot(): RuntimeBackendSnapshot;
    /**
     * Exercises the live backend. A healthy verdict requires both a real scene
     * render and a one-pixel GPU readback; construction alone is never proof.
     */
    probe(): Promise<RuntimeProbeReport>;
}
//# sourceMappingURL=backend-diagnostics.d.ts.map