/**
 * Log File Reader
 *
 * Safely reads per-run log files (stdout, stderr, context) from .tx/runs/ directories.
 * Includes path traversal protection and tail support for large files.
 */
import { Effect } from "effect";
/**
 * Check if a resolved path is under the project's .tx/runs/ directory.
 * Uses prefix match (startsWith) not substring match (includes) to prevent
 * bypasses where /.tx/runs/ appears elsewhere in the path.
 */
export declare const isAllowedRunPath: (filePath: string) => boolean;
/**
 * Read a log file with optional tail support.
 * Validates the path is under .tx/runs/ to prevent path traversal.
 *
 * @param filePath - Absolute path to the log file
 * @param tailLines - If > 0, return only the last N lines
 * @returns The file content and whether it was truncated
 */
export declare const readLogFile: (filePath: string, tailLines?: number) => Effect.Effect<{
    content: string;
    truncated: boolean;
}, Error>;
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