/**
 * Daemon entry-point logic extracted for testability.
 *
 * All functions in this module are pure filesystem / process utilities that
 * can be exercised in unit tests without forking a real daemon process.
 */
/**
 * Write the daemon startup confirmation file to tmpdir.
 *
 * Returns the absolute path of the file written so the caller can log it
 * or pass it to cleanupOnShutdown.
 */
export declare function writeStartupFile(pid: number, port: number): string;
/**
 * Remove daemon-owned files during graceful shutdown.
 *
 * Only removes the PID and auth files if the PID recorded in them matches
 * this process.  A new daemon may have already written its own files while
 * this process was shutting down — deleting them would orphan the successor.
 *
 * The startup file is always removed because it is PID-specific.
 *
 * Silently ignores ENOENT — any file that is already absent is fine.
 * Any other filesystem error is re-thrown.
 */
export declare function cleanupOnShutdown(pid: number): void;
/**
 * Read the package version from package.json in cwd.
 *
 * Falls back to "0.0.0" when the file cannot be found or parsed — this keeps
 * the daemon running even in unusual deploy layouts.
 */
export declare function getPackageVersion(): string;
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