GuestToHost: | { protocol: 1; type: "texbrain:ready" } | { log: string; pdf: string | null; status: number; type: "texbrain:compiled"; } | { dirty: boolean; type: "texbrain:dirty" } | { id: string; op: FsOp; type: "texbrain:fs" } | { id: string; type: "texbrain:pick:folder" }