import type { ActivityItem, TimelineGroup } from "./types.js";
/** Shared browser preview allowlist; other published files remain downloads. */
export declare function isRetainedImageContentType(contentType: string): boolean;
/** A published patch, applied locally with `git apply`. */
export declare function isPatchFilename(filename: string): boolean;
/**
 * Deliberately published images and patches are primary output, not
 * incidental screenshots or work files.
 */
export declare function activityPresentsImage(items: readonly ActivityItem[]): boolean;
export declare function timelineGroupContainsPresentedImage(group: TimelineGroup): boolean;