commit - 088ea0a1b34b1a9d038a2d0d0e48bb70cd9bcc04
commit + 0d486432bb90c030ac51cbc80a2ef2d69263e98f
blob - 5924258df05176135368876cf7f2787c9264c9da
blob + 1c7aaaaefc2d61283655a217cb662c8a496bf909
--- cvg/cvg.c
+++ cvg/cvg.c
@@ -9106,6 +9106,8 @@ cmd_info(int argc, char *argv[])
 	printf("work tree branch reference: %s\n",
 	    got_worktree_get_head_ref_name(worktree));
 	printf("work tree UUID: %s\n", uuidstr);
+	printf("work tree format version: %d\n",
+	    got_worktree_get_format_version(worktree));
 	printf("file index version: %u\n",
 	    got_worktree_fileindex_version(fileindex));
 	printf("repository: %s\n", got_worktree_get_repo_path(worktree));
blob - b335b04da4d3f018da9b53453f1b3c7c82e5bfb1
blob + 1b8a8ec0ecfb46325de632ebb24ebd9ade5dd4c2
--- got/got.c
+++ got/got.c
@@ -14704,6 +14704,8 @@ cmd_info(int argc, char *argv[])
 	printf("work tree branch reference: %s\n",
 	    got_worktree_get_head_ref_name(worktree));
 	printf("work tree UUID: %s\n", uuidstr);
+	printf("work tree format version: %d\n",
+	    got_worktree_get_format_version(worktree));
 	printf("file index version: %u\n",
 	    got_worktree_fileindex_version(fileindex));
 	printf("repository: %s\n", got_worktree_get_repo_path(worktree));
blob - 2ffc0c695b85896305072307f75db7799c0e05a6
blob + 746372d5909f4e6c88f43542fc445638af1b4f4a
--- include/got_worktree.h
+++ include/got_worktree.h
@@ -91,6 +91,11 @@ const char *got_worktree_get_path_prefix(struct got_wo
 const struct got_error *got_worktree_get_uuid(char **, struct got_worktree *);
 
 /*
+ * Get the work tree's format version number.
+ */
+int got_worktree_get_format_version(struct got_worktree *);
+
+/*
  * Check if a user-provided path prefix matches that of the worktree.
  */
 const struct got_error *got_worktree_match_path_prefix(int *,
blob - 2f9d146493695f5d0f999c4ccca8b981ffdf7c9d
blob + b1acd87d261a238419bf3f34736ce810f1efd4b8
--- lib/got_lib_worktree.h
+++ lib/got_lib_worktree.h
@@ -23,6 +23,7 @@ struct got_worktree {
 	struct got_object_id *base_commit_id;
 	char *head_ref_name;
 	uuid_t uuid;
+	int format_version;
 
 	/*
 	 * File descriptor for the lock file, open while a work tree is open.
blob - 7a75e7fcc5708ed78a01f8a89bf3bd3d6b5af636
blob + 492a1fd47f4ac6c4626b2aa128bed2da6f039385
--- lib/worktree_open.c
+++ lib/worktree_open.c
@@ -170,6 +170,7 @@ open_worktree(struct got_worktree **worktree, const ch
 		goto done;
 	}
 	(*worktree)->lockfd = -1;
+	(*worktree)->format_version = version;
 
 	(*worktree)->root_path = realpath(path, NULL);
 	if ((*worktree)->root_path == NULL) {
@@ -362,3 +363,9 @@ got_worktree_get_path_prefix(struct got_worktree *work
 {
 	return worktree->path_prefix;
 }
+
+int
+got_worktree_get_format_version(struct got_worktree *worktree)
+{
+	return worktree->format_version;
+}