/**
 * GitHub content source implementation.
 *
 * Processes markdown/MDX files directly from GitHub repositories
 * with support for Docusaurus-style versioned documentation.
 *
 * Features:
 * - Direct repository content fetching
 * - Docusaurus versioning support
 * - MDX preprocessing
 * - Heading-based chunking
 */
import { BaseContentSource } from '../base.js';
import type { SourceContext, SourceResult } from '../types.js';
import { GitHubSourceConfig } from './config.js';
/**
 * GitHub content source.
 *
 * Indexes markdown/MDX content directly from GitHub repositories.
 */
export declare class GitHubSource extends BaseContentSource<GitHubSourceConfig> {
    readonly type = "github";
    readonly name = "GitHub (Repository)";
    private api;
    /**
     * Process the GitHub source and return chunks.
     */
    process(config: GitHubSourceConfig, context: SourceContext): Promise<SourceResult>;
    /**
     * Validate and transform raw configuration.
     */
    validateConfig(config: unknown): GitHubSourceConfig;
    /**
     * Process a single version of the content.
     */
    private processVersion;
    /**
     * Chunk a markdown file into indexable pieces.
     */
    private chunkFile;
    /**
     * Generate chunk ID for GitHub content.
     *
     * This is GitHub-specific because it includes the repository name
     * for disambiguation when indexing multiple repositories.
     */
    private generateChunkIdForGitHub;
}
export type { GitHubSourceConfig, GitHubPreprocessingConfig, DocusaurusVersioningConfig, } from './config.js';
export { GitHubSourceConfigSchema, GITHUB_SOURCE_DEFAULTS } from './config.js';
export { GitHubAPI, createGitHubAPI, type GitHubFile } from './api.js';
export { discoverGitHubVersions, getVersionedDocsPath, shouldUseCleanUrl, type GitHubVersionInfo, } from './versioning.js';
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