sig
type status = NoScript | Script of string | Deprecated of string
val pp_status : Format.formatter -> ProofSession.status -> unit
val pp_goal : Format.formatter -> Wpo.t -> unit
val status : Wpo.t -> ProofSession.status
val exists : Wpo.t -> bool
val save : Wpo.t -> Json.t -> unit
val load : Wpo.t -> Json.t
val remove : Wpo.t -> unit
end