@@ -24,11 +24,11 @@
 
     from subprocess import Popen
 
-Lit_change_type = Literal['A', 'D', 'M', 'R', 'T']
+Lit_change_type = Literal['A', 'C', 'D', 'M', 'R', 'T']
 
 
 def is_change_type(inp: str) -> TypeGuard[Lit_change_type]:
-    return inp in ('A', 'D', 'M', 'R', 'T')
+    return inp in ('A', 'D', 'C', 'M', 'R', 'T')
 
 # ------------------------------------------------------------------------
 
 
@@ -391,7 +391,7 @@ def add(cls, repo: 'Repo', name: str, path: PathLike, url: Union[str, None] = No
         if sm.exists():
             # reretrieve submodule from tree
             try:
-                sm = repo.head.commit.tree[path]
+                sm = repo.head.commit.tree[path]  # type: ignore
                 sm._name = name
                 return sm
             except KeyError: