diff --git a/lib/lint.mli b/lib/lint.mli
new file mode 100644
index 0000000..c9b571d
--- /dev/null
+++ b/lib/lint.mli
@@ -0,0 +1,25 @@
+include module type of Lint_error
+
+val check :
+  new_pkgs:string list ->
+  changed_pkgs:string list ->
+  string ->
+  (OpamPackage.t * error) list
+(** [check ~new_pkgs ~changed_pkgs opam_repo] is a list of all the errors
+    detected while linting the [new_pkgs] and [changed_pkgs] in the context of the
+    opam repository located at [opam_repo].
+
+    @param new_pkgs Packages which are to be newly published.
+    @param changed_pkgs Packages that have been updated (e.g., to add maintainers
+        update dependency versions).
+    @param opam_repo The path a local opam repository.
+
+    Examples:
+
+    {[
+      let passes_all_checks = assert (check ~new_pkgs ~changed_pkgs repo |> List.length = 0)
+      let failed_some_checks = assert (check ~new_pkgs ~changed_pkgs repo |> List.length > 0)
+      let messages_for_all_failed_checks =
+        check ~new_pkgs ~changed_pkgs repo
+        |> List.map msg_of_error
+    ]} *)