/**
 * @fractary/core - Authentication Module
 *
 * Provides token providers and utilities for GitHub authentication.
 * Supports both Personal Access Token (PAT) and GitHub App authentication.
 */
export type { TokenProvider, GitHubAppConfig, GitHubConfig } from './types';
export { StaticTokenProvider } from './static-token-provider';
export { GitHubAppAuth } from './github-app-auth';
export { GitHubAppTokenProvider } from './github-app-token-provider';
import type { TokenProvider, GitHubConfig } from './types';
/**
 * Create a token provider from GitHub configuration
 *
 * Priority order:
 * 1. If config.app has id + installation_id → GitHubAppTokenProvider
 * 2. If GITHUB_TOKEN env var or config.token → StaticTokenProvider
 * 3. Otherwise throws AuthenticationError
 *
 * @param config GitHub configuration object
 * @returns TokenProvider instance
 * @throws AuthenticationError if no valid authentication method is found
 *
 * @example
 * ```typescript
 * // GitHub App authentication
 * const provider = createTokenProvider({
 *   app: {
 *     id: '123456',
 *     installation_id: '789012',
 *     private_key_path: '/path/to/key.pem'
 *   }
 * });
 *
 * // PAT authentication
 * const provider = createTokenProvider({
 *   token: 'ghp_xxxx'
 * });
 *
 * // Environment variable (GITHUB_TOKEN)
 * const provider = createTokenProvider({});
 * ```
 */
export declare function createTokenProvider(config?: GitHubConfig): TokenProvider;
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