/**
 * Descriptor-safe Sharp runtime capture and bounded image optimization.
 *
 * This module is intentionally not a package entry point. The public extension
 * binds it to the exact Sharp dependency declared by the extension manifest.
 */
import type { ImageOptimizationEngine, ImageOptimizationRequest, ImageOptimizationResult } from "veryfront/extensions/image";
/** Provider-level resource limits, independent of core's stricter boundary. */
export declare const SHARP_IMAGE_LIMITS: Readonly<{
    maxInputBytes: number;
    maxDecodedPixels: 100000000;
    maxDimension: 32768;
    maxTargetWidths: 64;
    maxFormats: 4;
    maxVariants: 260;
    maxOutputBytesPerVariant: number;
    maxTotalOutputBytes: number;
}>;
export interface SharpImageLimits {
    readonly maxInputBytes: number;
    readonly maxDecodedPixels: number;
    readonly maxDimension: number;
    readonly maxTargetWidths: number;
    readonly maxFormats: number;
    readonly maxVariants: number;
    readonly maxOutputBytesPerVariant: number;
    readonly maxTotalOutputBytes: number;
}
/** Captured calls into one exact Sharp module implementation. */
export interface CapturedSharpRuntime {
    readonly versions: Readonly<Record<string, string>>;
    create(input: Uint8Array, options: Readonly<Record<string, unknown>>): object;
    autoOrient(pipeline: object): object;
    metadata(pipeline: object): unknown;
    clone(pipeline: object): object;
    resize(pipeline: object, options: Readonly<Record<string, unknown>>): object;
    webp(pipeline: object, options: Readonly<Record<string, unknown>>): object;
    avif(pipeline: object, options: Readonly<Record<string, unknown>>): object;
    jpeg(pipeline: object, options: Readonly<Record<string, unknown>>): object;
    png(pipeline: object, options: Readonly<Record<string, unknown>>): object;
    toBuffer(pipeline: object, options: Readonly<Record<string, unknown>>): unknown;
}
/** Capture Sharp's callable, versions, and prototype methods exactly once. */
export declare function captureSharpRuntime(value: unknown): CapturedSharpRuntime;
/**
 * Internal engine used by the public extension and focused fake-runtime tests.
 * Every call snapshots one request and creates an independent Sharp pipeline.
 */
export declare class BoundSharpImageOptimizationEngine implements ImageOptimizationEngine {
    #private;
    readonly cacheIdentity: string;
    constructor(runtime: CapturedSharpRuntime, cacheIdentity: string, limits?: SharpImageLimits);
    optimize(request: ImageOptimizationRequest): Promise<ImageOptimizationResult>;
}
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