/**
 * Short, redacted excerpt of a terminal screen for owner-facing alerts.
 *
 * When an agent's input box cannot be read, the owner is asked to look at
 * it. A few readable rows (a permission dialog, a bare shell prompt) usually
 * answer "what is it stuck on" without opening the terminal. The rows can
 * hold secrets, so every row goes through the secret redactor, long opaque
 * tokens are masked, and the excerpt is capped in rows and characters.
 *
 * @module screen-excerpt
 */
/** Rows kept (bottom-most non-empty ones) */
export declare const SCREEN_EXCERPT_MAX_ROWS = 6;
/** Characters kept per row */
export declare const SCREEN_EXCERPT_MAX_ROW_CHARS = 100;
/** Characters kept in total */
export declare const SCREEN_EXCERPT_MAX_CHARS = 420;
/**
 * Build the excerpt from a screen's rows.
 *
 * @param lines - Screen rows, top to bottom
 * @returns The bottom rows, redacted and trimmed, joined by newlines ('' when blank)
 */
export declare function redactedScreenExcerpt(lines: readonly string[]): string;
/**
 * Whether the last row looks like a bare shell prompt (`user@host dir %`,
 * `$ `, `# `): the agent's runtime has exited to the shell, so there is no
 * input box to read.
 *
 * @param excerpt - An excerpt from {@link redactedScreenExcerpt}
 * @returns True for a shell prompt
 */
export declare function looksLikeShellPrompt(excerpt: string): boolean;
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