diff --git a/shell/zsh b/shell/zsh
index f5efe53..d726bce 100644
--- a/shell/zsh
+++ b/shell/zsh
@@ -7,7 +7,15 @@ function __tas_show() {
 }
 
 function __tas_start() {
-  tas start $(__tas_task_idx "$@")
+  if [[ "$1" != ""  ]]; then
+    tas start $(__tas_task_idx "$@")
+  fi
+}
+
+function __tas_remove() {
+  if [[ "$1" != ""  ]]; then
+    tas remove $(__tas_task_idx "$@")
+  fi
 }
 
 function __tas_list() {
@@ -28,6 +36,11 @@ function taz() {
 
     "start" | "st")
       __tas_start "$(__tas_list)"
+      ;;
+
+    "remove" | "rm")
+      __tas_remove "$(__tas_list)"
+      ;;
     
   esac
 }
diff --git a/src/repo/sqlite.rs b/src/repo/sqlite.rs
index 0a06f6a..77d47bd 100644
--- a/src/repo/sqlite.rs
+++ b/src/repo/sqlite.rs
@@ -297,6 +297,7 @@ impl SqliteRepo {
             return Ok(());
         }
 
+        // TODO: execute full schema if version is none
         if version.is_none() {
             run_migration!(self, version = 202208162308);
         }