interface QuarantineEntry {
    path: string;
    at: string;
    errors: string[];
}
/**
 * Produce actionable frontmatter diagnostics directly from file content.
 *
 * This duplicates the YAML parse that `parseFrontmatterOnly` already does,
 * but it runs only on the rare failure path (solution dropped from index),
 * so the overhead is acceptable in exchange for a human-readable error list.
 */
export declare function diagnoseFromRawContent(content: string): string[];
/**
 * Append one quarantine entry for `filePath`. Deduped by path within the
 * current file: if the latest entry for this path already matches the
 * current errors, skip the append.
 *
 * Storage: one JSONL line per quarantine event. Readers use only the
 * latest line per path.
 */
export declare function recordQuarantine(filePath: string, errors: string[]): void;
/**
 * Read the latest quarantine state: one entry per path, keyed to the most
 * recent append. Entries whose file no longer exists are dropped.
 */
export declare function listQuarantined(): QuarantineEntry[];
/**
 * Clear quarantine entries for files that now parse correctly or no longer
 * exist. Intended to be called after `forgen learn fix-up` or a manual edit.
 */
export declare function pruneQuarantine(): {
    removed: number;
    kept: number;
};
export {};