diff --git a/lib/contributions.mli b/lib/contributions.mli
index aec24b5..8773e76 100644
--- a/lib/contributions.mli
+++ b/lib/contributions.mli
@@ -1,5 +1,20 @@
 type t
 
+module Datetime : sig
+  type t = string
+end
+
+type item = {
+  repo : string;
+  kind : [`Issue | `PR | `Review of string | `New_repo ];
+  date: Datetime.t;
+  url : string;
+  title : string;
+  body : string;
+}
+
+module Repo_map : Map.S with type key = string
+
 val fetch : period:(string * string) -> token:Token.t -> Yojson.Safe.t
 
 val of_json : from:string -> Yojson.Safe.t -> t