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;;; llm-chat.el --- Use llm's in emacs -*- lexical-binding: t; -*-
;; This file is not part of GNU Emacs.
;; Copyright (C) 2025 Devyn Challman
;; Author: Devyn Challman devyn@challman.org
;; Maintainer: Devyn Challman devyn@challman.org
;; Version: 0.0.1
;; Keywords: llm, ai, chat
;;; License:
;; llm-chat.el is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; llm-chat.el is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(require 'transient)
(require 'llm-chat-api)
(require 'llm-chat-replacements)
(require 'llm-chat-gemini)
(require 'llm-chat-claude)
(require 'llm-chat-openai)
(require 'llm-chat-deepseek)
(transient-define-prefix llm-chat-prompt-menu ()
["llm-chat prompt menu"
("u" "user prompt" llm-chat-insert-user-prompt)
("y" "youtube summary" llm-chat-youtube-transcript-prompt)
("s" "system prompt" llm-chat-insert-system-prompt)])
(transient-define-prefix llm-chat-settings-menu ()
["llm-chat settings menu"
("t" "temperature" llm-chat-set-temperature)
("s" "stream" ignore)])
(transient-define-prefix llm-chat-model-menu ()
["llm-chat settings menu"
("dc" "deepseek-chat" (lambda () (interactive) (llm-chat-set-model "deepseek-chat")))
("dk" "deepseek-coder" (lambda () (interactive )(llm-chat-set-model "deepseek-coder")))
("dr" "deepseek-reasoner" (lambda () (interactive) (llm-chat-set-model "deepseek-reasoner")))
("g4" "gpt-4.1" (lambda () (interactive) (llm-chat-set-model "gpt-4.1")))
("g5" "gpt-5" (lambda () (interactive) (llm-chat-set-model "gpt-5")))
("ch" "claude-3-5-haiku-latest" (lambda () (interactive) (llm-chat-set-model "claude-3-5-haiku-latest")))])
(transient-define-prefix llm-chat-menu ()
["llm-chat menu"
("p" "prompt evaluate" llm-chat-capture-prompt)
("i" "insert prompt" llm-chat-prompt-menu)
("m" "model select" llm-chat-model-menu)
("hs" "history save" ignore)
("hl" "history load" ignore)
("hc" "history clear" llm-chat-reset-history)
("s" "settings" llm-chat-settings-menu)
("q" "close menu" ignore)])
(defun llm-chat-resolve-backend ()
(cond ((llm-chat-resolve-model-backend 'deepseek (llm-chat-get-model))
(llm-chat-make-deepseek-backend))
((llm-chat-resolve-model-backend 'gemini (llm-chat-get-model))
(llm-chat-make-gemini-backend))
((llm-chat-resolve-model-backend 'claude (llm-chat-get-model))
(llm-chat-make-claude-backend))
((llm-chat-resolve-model-backend 'openai (llm-chat-get-model))
(llm-chat-make-openai-backend))
(t
(progn
(message "Supported model not selected cannot resolve backend")
nil))))
(defun llm-chat-capture-prompt ()
(interactive)
(if-let* ((end-pos (point))
(search (re-search-backward "(\\(AI\\|USR\\|SYS\\)):" nil t))
(match (car (member (match-string 1) '("USR" "SYS"))))
(start-pos (+ (point) 6))
(prompt (buffer-substring-no-properties start-pos end-pos)))
(cond ((string= match "USR")
(when-let (backend (llm-chat-resolve-backend))
(if (not (string= (buffer-name) "*LLM Chat*"))
(with-current-buffer (get-buffer-create "*LLM Chat*")
(goto-char (point-max))
(insert prompt)))
(llm-chat-request backend
(llm-chat-bulk-replacements-with-dict prompt (llm-chat-get-replacements-dict)))
(goto-char end-pos)))
((string= match "SYS")
(progn
(llm-chat-set-system-prompt prompt)
(goto-char end-pos))))
(message "could not process prompt, no (USR) or (SYS) prompt")))
(defun llm-chat-youtube-transcript-prompt ()
(interactive)
(let ((file (read-file-name "Select YouTube transcript file: ")))
(when (file-exists-p file)
(with-current-buffer (get-buffer-create "*LLM Chat*")
(goto-char (point-max))
(insert "(USR): You are an expert summarizer tasked with creating a concise, structured summary of a YouTube video based on its subtitles. Follow these rules:
1. **Identify the Core Topic**:
- What is the main subject of the video? (1 sentence)
2. **Key Points**:
- Extract 3–5 central arguments, steps, or insights. Use bullet points.
- Ignore filler words, ads, or off-topic tangents.
3. **Conclusion/Takeaway**:
- What should the viewer remember? (1–2 sentences)
4. **Style**:
- Neutral tone, avoid opinionated language.
- Use plain English (no jargon unless necessary).
- Keep the summary under 200 words.
Here are the subtitles:\n")
(insert-file-contents file)
(goto-char (point-max))
))))
(provide 'llm-chat)
;;; llm-chat.el ends here
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