/**
 * @octomil/browser — Engine registry
 *
 * Minimal registry for discovering, benchmarking, and selecting inference
 * engines. In the browser environment only ONNX Runtime (WebGPU / WASM) is
 * available by default, but the registry allows third-party plugins to
 * register additional backends.
 *
 * Matches the cross-platform SDK interface.
 */
import type { EnginePlugin } from "./engine-plugin.js";
import type { DetectionResult, RankedEngine } from "../../../types.js";
export declare class EngineRegistry {
    private plugins;
    /** Register an engine plugin. Replaces any existing plugin with the same name. */
    register(plugin: EnginePlugin): void;
    /** Remove a registered plugin by name. */
    remove(name: string): boolean;
    /** Get a registered plugin by name. */
    get(name: string): EnginePlugin | undefined;
    /** List all registered plugin names. */
    get engines(): readonly string[];
    /** Clear all registrations. */
    reset(): void;
    /** Detect which registered engines are available. */
    detectAll(modelName?: string): Promise<DetectionResult[]>;
    /** Benchmark available engines and return results sorted by throughput. */
    benchmarkAll(modelName: string, nTokens?: number): Promise<RankedEngine[]>;
    /** Pick the best engine from benchmark results (highest throughput, no error). */
    selectBest(ranked: RankedEngine[]): RankedEngine | null;
    /** Convenience: detect → benchmark → select in one call. */
    autoSelect(modelName: string, nTokens?: number): Promise<RankedEngine | null>;
    private sortedPlugins;
}
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