Update the README with the Universal Summarizer

README.org

@@ -3,16 +3,28 @@
 
 * Introduction
 
-This package provides a shell to submit prompts to FastGPT, inspired by [[https://github.com/xenodium/chatgpt-shell][xenodium's chatgpt-shell]].
+This Emacs package provides the following functionalities from the Kagi search engine:
 
-Kagi is a relatively new ad-free search engine, offering additional services such as the [[https://kagi.com/summarizer][Universal Summarizer]] or more notably [[https://kagi.com/fastgpt][FastGPT]], their open source LLM offering. Some functionality is provided through an API.
+- FastGPT :: Kagi's open source LLM offering, as a shell inspired by [[https://github.com/xenodium/chatgpt-shell][xenodium's chatgpt-shell]].
+- Universal Summarizer :: Summarizes texts, webpages, videos and more.
 
-* Usage
+* Setup
 
-1. Make a Kagi account if you haven't done so already. An account is free, and comes with 100 trial searches.
+1. Create a Kagi account if you haven't done so already. An account is free, and comes with 100 trial searches.
 2. In [[https://kagi.com/settings?p=billing_api][your account settings]], put a balance for the API part (note that this is a separate balance than the subscription). The recommendation is to start with a one-time charge of $5. A single query ranges from 1 to 5 cents typically, depending on the amount of tokens processed.
 3. In [[https://kagi.com/settings?p=api][the API portal]], create an API token. Put the result in ~kagi-api-token~.
-4. You're good to go: run the command ~kagi-fastgpt-shell~ and start prompting.
+
+* Commands
+
+** FastGPT
+
+The FastGPT functionality has only one command: =kagi-fastgpt-shell=. This opens a shell buffer in a new window where prompts can be typed.
+
+** Universal Summarizer
+
+- =kagi-summarize-buffer= :: Summarizes the content of a buffer and displays it in a separate buffer.
+- =kagi-summarize-region= :: Similarly, the text inside the region is summarized and shown in a separate buffer.
+- =kagi-summarize-url= :: Prompts for a URL of which a summary is composed and displayed.
 
 * Installation and configuration
 
@@ -28,13 +40,26 @@ You way want to load and configure the package with ~use-package~, for example p
 
 #+begin_src elisp
   (use-package kagi
-    :commands kagi-fastgpt-shell
+    :commands
+    kagi-fastgpt-shell
+    kagi-summarize-buffer
+    kagi-summarize-region
+    kagi-summarize-url
     :ensure nil
     :load-path "/path/to/kagi.el"
     :custom
     (kagi-api-token "ABCDEF")
     ;; or use a function, e.g. with the password-store package:
-    (kagi-api-token (lambda () (password-store-get "Kagi/API"))))
+    (kagi-api-token (lambda () (password-store-get "Kagi/API")))
+
+    ;; summarizer settings
+    (kagi-api-summarizer-engine "cecil")
+    (kagi-api-summarize-default-language "EN"))
 #+end_src
 
 The token can be supplied directly as a string, but you could write a lambda to retrieve the token from a more secure location (e.g. [[https://passwordstore.org/][pass(1)]]).
+
+* References
+
+- [[https://help.kagi.com/kagi/api/fastgpt.html][FastGPT API]]
+- [[https://help.kagi.com/kagi/api/summarizer.html][Kagi Universal Summarizer API]]