refactor: improve bots/todo-* (#41)

bots/todo-sh/index.yaml

@@ -1,4 +1,4 @@
-name: Todo List
+name: TodoBot
 description: Your name is TodoBot and you are a helpful chatbot that manages a todo list.
 instructions: |
   You will be provided with a list of todos.

bots/todo-sh/tools.sh

@@ -31,7 +31,7 @@ del_todo() {
         > "$todos_file"
         echo "Successfully deleted todo id=$argc_id"
     else
-        _die "Empty todo list"
+        echo "Empty todo list"
     fi
 }
 
@@ -41,7 +41,7 @@ list_todos() {
     if [[ -f "$todos_file" ]]; then
         cat "$todos_file" 
     else
-        _die "Empty todo list"
+        echo '[]'
     fi
 }
 
@@ -63,10 +63,5 @@ _get_todos_file() {
     echo "${LLM_BOT_CACHE_DIR:-/tmp}/todos.json"
 }
 
-_die() {
-    echo "$*" >&2
-    exit 1
-}
-
 # See more details at https://github.com/sigoden/argc
 eval "$(argc --argc-eval "$0" "$@")"