export type RuntimeEnvironment = "deno-wasi" | "node-wasi" | "bun-wasi" | "browser" | "node-emscripten" | "worker" | "cloudflare";
export type WasmBinaryType = "wasi" | "emscripten";
export interface RuntimeDetectionResult {
    environment: RuntimeEnvironment;
    wasmType: WasmBinaryType;
    supportsFilesystem: boolean;
    supportsStreaming: boolean;
    performanceTier: 1 | 2 | 3;
}
/**
 * Check if a Node.js version meets the minimum requirement (v22.6.0+).
 * Returns an error message string if the version is too old, or undefined if OK.
 * Pass undefined for non-Node environments (always returns undefined).
 */
export declare function checkNodeVersion(nodeVersion: string | undefined): string | undefined;
export declare function detectRuntime(): RuntimeDetectionResult;
/**
 * Detect whether the runtime supports the Wasm `exnref` type.
 * Uses `WebAssembly.validate()` with a minimal probe module — synchronous and zero-cost.
 */
export declare function supportsExnref(): boolean;
export declare function getEnvironmentDescription(env: RuntimeEnvironment): string;
export declare function canLoadWasmType(wasmType: WasmBinaryType): boolean;
/** @internal */
export declare function _forceRuntime(result: RuntimeDetectionResult): void;
/** @internal */
export declare function _clearRuntimeOverride(): void;
/** @internal */
export declare function _getDetectionResult(): RuntimeDetectionResult;
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