import type { CartridgeReader } from "../cartridge/reader";
import type { IndexV1, Lesson, Resource, ResourceVideo, Unit } from "../cartridge/types";
import { type VideoMetadata } from "../stimulus/video-metadata";
export declare function readIndex(reader: CartridgeReader): Promise<IndexV1>;
export declare function readUnit(reader: CartridgeReader, unitPath: string): Promise<Unit>;
export declare function readLesson(reader: CartridgeReader, lessonPath: string): Promise<Lesson>;
export declare function readArticleContent(reader: CartridgeReader, articlePath: string): Promise<string>;
export declare function isVideoResource(res: Resource): res is ResourceVideo;
export declare function readVideoMetadata(reader: CartridgeReader, resource: ResourceVideo): Promise<VideoMetadata>;
export declare function readQuestionXml(reader: CartridgeReader, xmlPath: string): Promise<string>;
export declare function readQuestionJson(reader: CartridgeReader, jsonPath: string): Promise<unknown>;
export declare function iterUnits(reader: CartridgeReader): AsyncIterable<Unit>;
export declare function iterUnitLessons(reader: CartridgeReader, unit: Unit): AsyncIterable<Lesson>;
export declare function iterLessonResources(_reader: CartridgeReader, lesson: Lesson): AsyncIterable<Resource>;
export declare function validateIntegrity(reader: CartridgeReader): Promise<{
    ok: boolean;
    issues: Array<{
        path: string;
        reason: string;
    }>;
}>;
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