[doom] Configure gptel for tool calling

Adds some basic tools for experimenting

home/modules/emacs/doom/config.el

@@ -80,11 +80,47 @@
 
 (after! gptel
   :config
-  (setq! gptel-api-key (my/get-rbw-password "openai-api-key-chatgpt-el"))
+  (setq! gptel-api-key (my/get-rbw-password "openai-api-key-chatgpt-el")
+         gptel-default-mode 'org-mode
+         gptel-use-tools t
+         gptel-confirm-tool-calls 'always)
+
   (gptel-make-ollama "Ollama-Local"
     :host "localhost:11434"
     :stream t
-    :models '(deepseek-r1 deepseek-r1-fullctx qwen3 qwen3-coder)))
+    :models '(deepseek-r1 deepseek-r1-fullctx qwen3 qwen3-coder llama3.1 qwen2.5-coder mistral-nemo gpt-oss))
+
+  ;; Define custom tools
+  (gptel-make-tool
+   :name "run_shell_command"
+   :description "Execute shell commands and return output. Use this to run system commands, check file contents, or perform system operations."
+   :function (lambda (command)
+               (condition-case err
+                   (shell-command-to-string command)
+                 (error (format "Error running command: %s" (error-message-string err)))))
+   :args (list '(:name "command" :type "string" :description "Shell command to execute")))
+
+  (gptel-make-tool
+   :name "read_file"
+   :description "Read the contents of a file and return as text"
+   :function (lambda (filepath)
+               (condition-case err
+                   (with-temp-buffer
+                     (insert-file-contents (expand-file-name filepath))
+                     (buffer-string))
+                 (error (format "Error reading file %s: %s" filepath (error-message-string err)))))
+   :args (list '(:name "filepath" :type "string" :description "Path to the file to read")))
+
+  (gptel-make-tool
+   :name "list_directory"
+   :description "List contents of a directory"
+   :function (lambda (dirpath)
+               (condition-case err
+                   (mapconcat 'identity 
+                              (directory-files (expand-file-name dirpath) nil "^[^.]")
+                              "\n")
+                 (error (format "Error listing directory %s: %s" dirpath (error-message-string err)))))
+   :args (list '(:name "dirpath" :type "string" :description "Directory path to list"))))
 
 (use-package! claude-code-ide
   :defer t