```common lisp
;;;; The MIT License (MIT)

;;;; Copyright (c) 2015 Huang Xuxing

;;;; Permission is hereby granted, free of charge, to any person obtaining
;;;; a copy of this software and associated documentation files
;;;; (the "Software"), to deal in the Software without restriction,
;;;; including without limitation the rights to use, copy, modify, merge,
;;;; publish, distribute, sublicense, and/or sell copies of the Software,
;;;; and to permit persons to whom the Software is furnished to do so,
;;;; subject to the following conditions:

;;;; The above copyright notice and this permission notice shall be included
;;;; in all copies or substantial portions of the Software.

;;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;;;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;;;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
;;;; THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;;;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
;;;; ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
;;;; OTHER DEALINGS IN THE SOFTWARE.

(in-package :asdf-user)

(defsystem :cl-cat
  :version "0.0.0"
  :licence "MIT"
  :description ""
  :long-description ""
  :components
  ((:static-file "LICENSE")
   (:static-file "README.md")
   (:file "packages")
   (:file "category" :depends-on ("packages"))
   (:file "object" :depends-on ("packages" "category"))
   (:file "predicate" :depends-on ("packages" "category"))))
```

Add short description in ASDF file
user
```common lisp
;;;; The MIT License (MIT)

;;;; Copyright (c) 2015 Huang Xuxing

;;;; Permission is hereby granted, free of charge, to any person obtaining
;;;; a copy of this software and associated documentation files
;;;; (the "Software"), to deal in the Software without restriction,
;;;; including without limitation the rights to use, copy, modify, merge,
;;;; publish, distribute, sublicense, and/or sell copies of the Software,
;;;; and to permit persons to whom the Software is furnished to do so,
;;;; subject to the following conditions:

;;;; The above copyright notice and this permission notice shall be included
;;;; in all copies or substantial portions of the Software.

;;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;;;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;;;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
;;;; THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;;;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
;;;; ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
;;;; OTHER DEALINGS IN THE SOFTWARE.

(in-package :asdf-user)

(defsystem :cl-cat
  :version "0.0.0"
  :licence "MIT"
  :description "A category abstraction of CLOS."
  :components
  ((:static-file "LICENSE")
   (:static-file "README.md")
   (:file "packages")
   (:file "category" :depends-on ("packages"))
   (:file "object" :depends-on ("packages" "category"))
   (:file "predicate" :depends-on ("packages" "category"))))
```
assistant