/**
 * TUI-safe logging for pi-agent-flow.
 *
 * During flow execution, the TUI redraws the entire screen on every frame.
 * Any console.warn/console.error output to stderr briefly flashes on-screen
 * before being overwritten, causing the "text appears then disappears" glitch.
 *
 * This module provides a `logWarn` / `logError` pair that:
 *   - Writes to a file when the TUI is active (env PI_TUI_MODE=1 or when
 *     the process is a child flow at depth > 0).
 *   - Falls back to console.warn/console.error when not in a TUI context
 *     (e.g. test runners, direct CLI invocations).
 *
 * The log file path is `PI_FLOW_LOG_FILE` or `${TMPDIR}/pi-agent-flow.log`
 * by default. Set `PI_FLOW_LOG_FILE=/dev/null` to suppress entirely.
 */
/**
 * Log a warning message. When TUI is active, writes to the log file
 * instead of stderr to avoid on-screen flashing.
 */
export declare function logWarn(message: string): void;
/**
 * Log an error message. When TUI is active, writes to the log file
 * instead of stderr to avoid on-screen flashing.
 */
export declare function logError(message: string): void;
//# sourceMappingURL=log.d.ts.map