import type { InputSource, SourceCredentials, SourceOptions, SourceResult } from './types.js';
/**
 * Abstract base class for input sources
 * Provides common functionality for all source implementations
 */
export declare abstract class BaseSource implements InputSource {
    abstract name: string;
    abstract description: string;
    abstract type: 'builtin' | 'integration';
    /**
     * Check if this source is available
     * Override in subclasses for custom availability checks
     */
    isAvailable(): Promise<boolean>;
    /**
     * Whether this source requires authentication
     * Override in subclasses that need auth
     */
    requiresAuth(): boolean;
    /**
     * Fetch content from this source
     * Must be implemented by subclasses
     */
    abstract fetch(identifier: string, options?: SourceOptions): Promise<SourceResult>;
    /**
     * Get help text for using this source
     * Override in subclasses for custom help
     */
    getHelp(): string;
    /**
     * Get credentials for this source from config
     */
    protected getCredentials(): Promise<SourceCredentials | null>;
    /**
     * Validate that credentials work
     * Override in subclasses that need auth
     */
    validateCredentials(): Promise<boolean>;
    /**
     * Convert content to markdown if needed
     * Helper for sources that fetch non-markdown content
     */
    protected toMarkdown(content: string, format?: 'text' | 'html' | 'json'): string;
    /**
     * Create a standardized error message
     */
    protected error(message: string): never;
}
/**
 * Base class for builtin sources (file, url, pdf)
 */
export declare abstract class BuiltinSource extends BaseSource {
    type: 'builtin';
    requiresAuth(): boolean;
}
/**
 * Base class for integration sources (linear, notion, github, figma)
 */
export declare abstract class IntegrationSource extends BaseSource {
    type: 'integration';
    requiresAuth(): boolean;
    /**
     * Get the required credential key name
     * Override in subclasses
     */
    protected getRequiredCredentialKey(): string;
    /**
     * Get the API key for this integration
     */
    protected getApiKey(): Promise<string>;
}
//# sourceMappingURL=base.d.ts.map