/**
 * Build a "Recurring Mistakes — Avoid Repeating" prompt section. Empty when
 * there are no clusters or the file is missing.
 *
 * The section is short and direct: pattern label + sample task + sample error
 * + "what NOT to do" hint where the pattern is well-known. The agent uses
 * these to short-circuit known dead-ends instead of repeating exploration.
 */
export declare function buildAntiSkillsSection(): Promise<string>;