/** How the preview writes numbers, commits and untrusted text. Nothing here reads a plan. */
/** The thousands abbreviation of FR-18: 34000 becomes "34k", 840 stays "840". */
export declare function formatTokens(tokens: number): string;
/** The short commit form the preview shows. */
export declare function shortCommit(commit: string): string;
/**
 * True when two commits name the same one, whether abbreviated or full. A prefix match
 * needs at least a short commit on both sides: source text is untrusted, and "9" must
 * not silence the warning that the tree moved.
 */
export declare function sameCommit(left: string, right: string): boolean;
/**
 * One line in, one line out. Source titles and paths are attacker-controlled text
 * (FR-60): folding newlines and control characters is what stops a session title
 * from forging a preview line of its own.
 */
export declare function oneLine(text: string, maxLength?: number): string;
/** Singular or plural, chosen by the count. */
export declare function plural(count: number, one: string, many: string): string;