Droid: use native acp client and support default model and mode

Author: kohnish

README.org

@@ -133,13 +133,13 @@ See https://github.com/mistralai/mistral-vibe for details.
 
 *** Factory Droid
 
-For Factory Droid, install the =droid-acp= client:
+For Factory Droid, install Droid:
 
 #+begin_src bash
-npm install -g droid-acp
+curl -fsSL https://app.factory.ai/cli | sh
 #+end_src
 
-See https://github.com/yaonyan/droid-acp for details.
+See https://factory.ai for details.
 
 *** Pi
 

agent-shell-droid.el

@@ -73,8 +73,35 @@ For no authentication (e.g., using `droid-acp` built-in login):
   :type 'alist
   :group 'agent-shell)
 
+(defcustom agent-shell-droid-default-model-id
+  nil
+  "Default Droid AI model ID.
+
+Must be one of the model ID's displayed under \"Available models\"
+when starting a new shell."
+  :type '(choice (const nil) string)
+  :group 'agent-shell)
+
+(defcustom agent-shell-droid-default-session-mode-id
+  nil
+  "Default Droid AI session mode ID.
+
+Must be one of the mode ID's displayed under \"Available modes\"
+when starting a new shell."
+  :type '(choice (const nil) string)
+  :group 'agent-shell)
+
+(defcustom agent-shell-droid-default-reasoning-effort
+  "none"
+  "Default reasoning effort.
+
+It can be one of the followings.
+none, dynamic, off, minimal, low, medium, high, xhigh, max"
+  :type '(choice (const nil) string)
+  :group 'agent-shell)
+
 (defcustom agent-shell-droid-acp-command
-  '("droid-acp")
+  (list "droid" "exec" "--reasoning-effort" agent-shell-droid-default-reasoning-effort "--output-format" "acp")
   "Command and parameters for the Factory Droid ACP client.
 
 The first element is the command name, and the rest are command parameters."
@@ -111,6 +138,8 @@ Returns an agent configuration alist using `agent-shell-make-agent-config'."
    :welcome-function #'agent-shell-droid--welcome-message
    :client-maker (lambda (buffer)
                    (agent-shell-droid-make-client :buffer buffer))
+   :default-model-id (lambda () agent-shell-droid-default-model-id)
+   :default-session-mode-id (lambda () agent-shell-droid-default-session-mode-id)
    :install-instructions "See https://github.com/yaonyan/droid-acp for installation."))
 
 (defun agent-shell-droid-start-agent ()