/**
 * Turn configured hub.repos (if any) OR discovered `kb-*` siblings into
 * absolute repo-root paths whose derived facts.db actually exists.
 * Never throws: a configured path that does not exist is skipped.
 *
 * @param projectRoot  Absolute path to the current project root.
 * @param configuredRepos  Optional list from config hub.repos; pass undefined
 *   to fall through to kb-* sibling discovery.
 */
export declare function resolveSiblingRepos(projectRoot: string, configuredRepos?: string[]): Promise<string[]>;
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