/**
 * Replace bare block UUIDs in markdown text with clickable chips. Known UUIDs
 * become `<a class="bk-agent-block-ref" href="#uuid">label</a>`; UUIDs whose
 * block is no longer on the page become a non-clickable
 * `<span class="bk-agent-block-ref-deleted">[<deletedLabel>]</span>`.
 *
 * UUIDs inside fenced or inline code regions and UUIDs already used as a link
 * target (preceded by `#`) are left alone, so existing `[text](#uuid)` links
 * from older conversations pass through unchanged.
 */
export declare function linkifyBlockUuids(content: string, resolve: (uuid: string) => string | null, deletedLabel: string): string;