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;;; ai-config.el --- Configuration for AI Integrations -*- lexical-binding: t; -*-
;; author Craig Jennings <c@cjennings.net>
;;; Commentary:
;; Here is my basic workflow:
;; - Launch GPTel via F9 or C-h g t, and chat with the AI in the side window.
;; Remember that sending the message requires C-<return>.
;; Note that you can save a file, then turn on gptel-mode to resume your
;; conversation.
;;; ------------------------------- Directives ---------------------------------
(defvar default-directive
"You are a large language model living in Emacs. You understand philosophy, critical theory, and comparative
literature at a university graduate student level. You are concise and always provide references to source material.")
(defvar code-only-directive
"You are a large language model living in Emacs. You are an expert in emacs-lisp, Python, Golang, and Shell scripting.
You encourage unit testing and always provide unit tests when you provide code.")
(defvar writing-directive
"You are a large language model and a writing assistant. Respond concisely.")
(defvar chat-directive
"You are a large language model and a funny conversation partner who asks good questions.")
;;; ------------------------------ Toggle GPTel --------------------------------
(defun cj/toggle-gptel ()
"Toggle the visibility of the ChatGPT buffer, and when shown place point at its end."
(interactive)
(let* ((buf-name "*AI-Assistant*")
(buffer (get-buffer buf-name))
(win (and buffer (get-buffer-window buffer))))
(if win
;; If it's already visible, just close it
(delete-window win)
;; Otherwise ensure the buffer exists
(unless buffer
(gptel buf-name gptel-model))
(setq buffer (get-buffer buf-name))
;; Display in a side window, select it, and move point to end
(setq win
(display-buffer-in-side-window
buffer
'((side . right)
(window-width . 0.4))))
(select-window win)
(with-current-buffer buffer
(goto-char (point-max))))))
;; ------------------------- GPTel Config And AI-Keymap ------------------------
(defvar ai-keymap
(let ((map (make-sparse-keymap)))
(define-key map (kbd "t") #'cj/toggle-gptel)
(define-key map (kbd "c") #'cj/gptel-clear-buffer)
map)
"Keymap for AI commands, bound to C-h g…")
(global-set-key (kbd "C-h g") ai-keymap)
(use-package gptel
:defer 0.5
:commands (gptel gptel-send)
:bind
("<f9>" . cj/toggle-gptel)
(:map gptel-mode-map
("C-<return>" . gptel-send))
:custom
(gptel-default-mode 'org-mode)
(gptel-expert-commands t)
(gptel-track-media t)
(gptel-include-reasoning 'ignore)
(gptel-model 'o4-mini) ;; keep or change to your preferred model
(gptel-log-level 'info)
(gptel--debug nil)
:config
;; Directives
(setq gptel-directives
`((default . ,default-directive)
(code-only . ,code-only-directive)
(writing . ,writing-directive)
(chat . ,chat-directive)))
;; Dynamic user prefix for org-mode heading (string, refreshed just before send)
(defun cj/gptel--fresh-org-prefix ()
(concat "*** cj " (format-time-string "[%Y-%m-%d %H:%M:%S]") "\n"))
;; Initialize as a string (GPTel expectation)
(setf (alist-get 'org-mode gptel-prompt-prefix-alist)
(cj/gptel--fresh-org-prefix))
;; Refresh immediately before each send for accurate timestamp
(defun cj/gptel--refresh-org-prefix (&rest _)
(setf (alist-get 'org-mode gptel-prompt-prefix-alist)
(cj/gptel--fresh-org-prefix)))
(advice-add 'gptel-send :before #'cj/gptel--refresh-org-prefix)
;; AI header on each reply: (e.g. "*** ChatGPT: <model> [timestamp]")
(defun cj/gptel-backend-and-model ()
"Return backend, model, and timestamp as a single string."
(let* ((backend (pcase (bound-and-true-p gptel-backend)
((and v (pred vectorp)) (aref v 1)) ;; display name if vector
(_ "ChatGPT")))
(model (format "%s" (or (bound-and-true-p gptel-model) "")))
(ts (format-time-string "[%Y-%m-%d %H:%M:%S]")))
(format "%s: %s %s" backend model ts)))
(defun cj/gptel-insert-model-heading (response-begin-pos _response-end-pos)
"Insert an Org heading for the AI reply at RESPONSE-BEGIN-POS."
(save-excursion
(goto-char response-begin-pos)
(insert (format "*** %s\n" (cj/gptel-backend-and-model)))))
(defun cj/gptel-clear-buffer ()
"Erase the contents of the *AI-Assistant* buffer, re-insert the org heading, and message."
(interactive)
(let ((buf (get-buffer "*AI-Assistant*")))
(if (not buf)
(message "No AI buffer found")
(with-current-buffer buf
(erase-buffer)
;; re-insert the user heading with fresh timestamp
(insert (cj/gptel--fresh-org-prefix))
(message "AI buffer cleared and heading reset")))))
;; Hook is called with (BEG END); add our per-reply heading
(add-hook 'gptel-post-response-functions #'cj/gptel-insert-model-heading)
;; ---- Auth: pick the API key from your auth source
(setq auth-sources `((:source ,authinfo-file)))
(setq gptel-api-key (auth-source-pick-first-password :host "api.openai.com")))
;; -------------------------------- GPTel-Magit --------------------------------
(use-package gptel-magit
:defer .5
:hook (magit-mode . gptel-magit-install))
(provide 'ai-config)
;;; ai-config.el ends here
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