diff --git a/src/main/include/models.h b/src/main/include/models.h
new file mode 100644
index 0000000..866488f
--- /dev/null
+++ b/src/main/include/models.h
@@ -0,0 +1,50 @@
+#pragma once
+
+#include <sys/types.h>
+
+struct klist_user {
+    u_int id;
+    char *name;
+    u_int local_id;
+    u_int discord_id;
+    u_int google_id;
+};
+typedef struct klist_user klist_user;
+
+klist_user *klist_user_init();
+void klist_user_deinit(klist_user *);
+
+
+struct klist_stage {
+    u_int id;
+    char *name;
+    char *desc;
+};
+typedef struct klist_stage klist_stage;
+
+klist_stage *klist_stage_init();
+void klist_stage_deinit(klist_stage *);
+
+
+struct klist_list {
+    u_int id;
+    char *name;
+    char *desc;
+
+};
+typedef struct klist_list klist_list;
+
+klist_list *klist_list_init();
+void klist_list_deinit(klist_list *);
+
+
+struct klist_task {
+    u_int id;
+    char *name;
+    char *desc;
+
+};
+typedef struct klist_task klist_task;
+
+klist_task *klist_task_init();
+void klist_task_deinit(klist_task *);
\ No newline at end of file
diff --git a/src/main/include/sql.h b/src/main/include/sql.h
index 6431744..c886cb5 100644
--- a/src/main/include/sql.h
+++ b/src/main/include/sql.h
@@ -1,4 +1,5 @@
 #pragma once
+#include <sys/types.h>
 
 enum KLIST_SQL {
     INIT,
diff --git a/src/main/include/util.h b/src/main/include/util.h
index d0d0a41..735b277 100644
--- a/src/main/include/util.h
+++ b/src/main/include/util.h
@@ -78,4 +78,14 @@ void klist_task_context_deinit(klist_task_context *ctx);
  * sql preparations
  */
 
-void klist_sql_prepare(klist *, char *db);
\ No newline at end of file
+void klist_sql_prepare(klist *, char *);
+
+
+
+/*
+ * assuring things
+ */
+
+void klist_assure_user(klist *, __uid_t, char *);
+void klist_assure_list(klist *, char *);
+void klist_assure_task(klist *, char *);
\ No newline at end of file
diff --git a/src/main/models.c b/src/main/models.c
new file mode 100644
index 0000000..e69de29