/**
 * The creator's browser-tab icon override, read out of the project's work copy.
 *
 * The CLI only reads and forwards it — deriving the actual icon needs sharp, which has no
 * business in a package creators install globally, so `publish/begin` does that and hands back
 * a URL. See `api-server/src/cli/publish-favicon.ts`.
 *
 * game.json wins over world.json for the same key, matching the split-format rule the web lane's
 * `resolveGameCoverUrl` documents: `worldProfileData` may live in either file, and game.json is
 * the current home.
 *
 * Everything here is best effort. A missing, unreadable or malformed file means "no override",
 * never an error — a tab icon must not be able to fail a publish.
 */
export declare function readFaviconOverride(root: string): string | undefined;