import type { CompilerOptions } from 'typescript';
/**
 * Default compiler options for TypeScript compilation
 */
export declare const compilerOptionsDefault: CompilerOptions;
/**
 * TsConfig handles loading and merging TypeScript compiler configurations.
 * It supports reading tsconfig.json and merging with defaults and custom options.
 */
export declare class TsConfig {
    private cwd;
    private cachedTsConfig;
    constructor(cwd?: string);
    /**
     * Get the current working directory
     */
    getCwd(): string;
    /**
     * Load and parse tsconfig.json from the current directory
     */
    load(): CompilerOptions;
    /**
     * Get default compiler options
     */
    getDefaultOptions(): CompilerOptions;
    /**
     * Get critical/protected default options that shouldn't be overridden by tsconfig.json
     */
    getProtectedDefaults(): CompilerOptions;
    /**
     * Process command line arguments and return applicable compiler options
     */
    getCommandLineOptions(argvArg?: any): CompilerOptions;
    /**
     * Merge compiler options with proper priority order:
     * 1. Default options
     * 2. tsconfig.json options
     * 3. Protected defaults (cannot be overridden by tsconfig)
     * 4. Custom options (programmatic)
     * 5. CLI options (highest priority)
     */
    merge(customOptions?: CompilerOptions, argvArg?: any): CompilerOptions;
    /**
     * Clear the cached tsconfig (useful for reloading)
     */
    clearCache(): void;
}