/**
 * Validates that a fixture directory path stays within the project root.
 * Rejects absolute paths and parent-traversal that escape the working directory.
 * Uses path.relative() for cross-platform support (POSIX + Windows).
 */
export declare function assertSafeFixtureDir(fixtureDir: string, cwd: string): void;
/**
 * Resolves the fixture directory from config, falling back to the default
 * if no config is found or loading fails.
 *
 * Accepts the raw --config CLI value: a file path, a directory, or a stem.
 * Derives cwd from the config path so relative fixtureDir resolves correctly.
 */
export declare function resolveFixtureDir(configArg?: string): Promise<string>;
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