feat(ai): add gemini-cli integration with doom leader bindings

Switch Claude Code usage toward EAT-related setup and simplify theme loading to doom-one while adding the emacs-eat package declaration.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ai.el

@@ -9,7 +9,7 @@
   :defer t
   :config
   ;; Default backend: OpenRouter
-  (setq gptel-model 'google/gemini-2.5-flash
+  (setq gptel-model 'google/gemini-3.flash-preview
         gptel-backend
         (gptel-make-openai "OpenRouter"
           :host "openrouter.ai"
@@ -48,32 +48,32 @@
 (after! gptel
   ;; Coding assistant preset
   (gptel-make-preset 'coder
-                     :description "Expert coding assistant"
+    :description "Expert coding assistant"
-                     :backend "OpenRouter"
+    :backend "OpenRouter"
-                     :model 'anthropic/claude-sonnet-4.5
+    :model 'anthropic/claude-sonnet-4.5
-                     :system "You are an expert coding assistant. Provide high-quality code solutions, refactorings, and explanations. Be concise but thorough. Include error handling and follow best practices.")
+    :system "You are an expert coding assistant. Provide high-quality code solutions, refactorings, and explanations. Be concise but thorough. Include error handling and follow best practices.")
 
   ;; Code explainer preset
   (gptel-make-preset 'explain
-                     :description "Explain code to beginners"
+    :description "Explain code to beginners"
-                     :system "Explain this code to a novice programmer. Use simple language and break down complex concepts.")
+    :system "Explain this code to a novice programmer. Use simple language and break down complex concepts.")
 
   ;; Refactoring preset
   (gptel-make-preset 'refactor
-                     :description "Code refactoring expert"
+    :description "Code refactoring expert"
-                     :model 'anthropic/claude-sonnet-4.5
+    :model 'anthropic/claude-sonnet-4.5
-                     :system "You are a code refactoring expert. Improve code quality, readability, and performance while maintaining functionality. Explain your changes.")
+    :system "You are a code refactoring expert. Improve code quality, readability, and performance while maintaining functionality. Explain your changes.")
 
   ;; Quick answers preset
   (gptel-make-preset 'quick
-                     :description "Quick, concise answers"
+    :description "Quick, concise answers"
-                     :model 'google/gemini-2.5-flash
+    :model 'google/gemini-2.5-flash
-                     :system "Provide quick, concise answers. Be direct and to the point.")
+    :system "Provide quick, concise answers. Be direct and to the point.")
 
   ;; Documentation writer preset
   (gptel-make-preset 'docs
-                     :description "Documentation writer"
+    :description "Documentation writer"
-                     :system "Write clear, comprehensive documentation. Include examples and explain edge cases."))
+    :system "Write clear, comprehensive documentation. Include examples and explain edge cases."))
 
 ;;; ============================================================================
 ;;; gptel-quick - Quick lookups and explanations
@@ -161,9 +161,9 @@
   (when (use-region-p)
     (let ((code (buffer-substring-no-properties (region-beginning) (region-end))))
       (gptel-request code
-                     :system "Explain this code concisely in 2-3 sentences."
+        :system "Explain this code concisely in 2-3 sentences."
-                     :callback (lambda (response info)
+        :callback (lambda (response info)
-                                 (message "Explanation: %s" response))))))
+                    (message "Explanation: %s" response))))))
 
 (defun my/gptel-proofread-region ()
   "Proofread and improve selected text."
@@ -183,16 +183,23 @@
 (use-package! claude-code
   :defer t
   :config
+  ;; Unset CLAUDECODE to allow running Claude Code inside Emacs sub-processes
+  (setenv "CLAUDECODE" nil)
   (setq claude-code-program "ccr"
         claude-code-program-switches '("code" "--dangerously-skip-permissions"))
 
-  ;; Use vterm backend
+  ;; Use Eat backend
-  (setq claude-code-terminal-backend 'eat)
+  (setq claude-code-terminal-backend 'eat
+        ;; Emacs-style editing in Claude buffer: RET inserts newline, S-RET sends
+        claude-code-newline-keybinding-style 'shift-return-to-send)
 
   ;; Enable global mode
   (claude-code-mode 1)
 
-  ;; Set key bindings prefix
+  ;; Emacs-style prefix key (works without Doom/Evil leader keys)
+  (global-set-key (kbd "C-c c") claude-code-command-map)
+
+  ;; Set Doom leader keybindings
   (map! :leader
         (:prefix ("C" . "claude-code")
          :desc "Start Claude" "c" #'claude-code
@@ -237,26 +244,94 @@
               (when (eq claude-code-terminal-backend 'vterm)
                 (setq-local vterm-max-scrollback 100000)))))
 
-(use-package! claudemacs
+;;; Gemini CLI Configuration
+
+(use-package! gemini-cli
   :defer t
-  :commands (claudemacs claudemacs-transient-menu)
-  :init
-  (setq claudemacs-program "ccr"
-        claudemacs-program-switches '("code" "--dangerously-skip-permissions")
-        claudemacs-default-tool 'claude
-        claudemacs-prefer-projectile-root t)
   :config
-  (map! :map prog-mode-map
+  ;; Set the Gemini executable
-        "C-c C-e" #'claudemacs-transient-menu)
+  (setq gemini-cli-program "gemini"
-  (map! :map emacs-lisp-mode-map
+        gemini-cli-program-switches nil)
-        "C-c C-e" #'claudemacs-transient-menu)
+
-  (map! :map text-mode-map
+  ;; Use Eat backend
-        "C-c C-e" #'claudemacs-transient-menu)
+  (setq gemini-cli-terminal-backend 'eat
-  (after! python
+        ;; Emacs-style editing in Gemini buffer: RET inserts newline, S-RET sends
-    (map! :map python-base-mode-map
+        gemini-cli-newline-keybinding-style 'shift-return-to-send)
-          "C-c C-e" #'claudemacs-transient-menu))
+
-  (after! eat
+  ;; Enable global mode
-    (setq eat-term-scrollback-size 400000))
+  (gemini-cli-mode 1)
+
+  ;; Emacs-style prefix key
+  (global-set-key (kbd "C-c g") gemini-cli-command-map)
+
+  ;; Set Doom leader keybindings under SPC G
   (map! :leader
-        (:prefix ("C" . "claude-code")
+        (:prefix ("G" . "gemini-cli")
-         :desc "Claudemacs menu" "E" #'claudemacs-transient-menu)))
+         :desc "Start Gemini" "c" #'gemini-cli
+         :desc "Start in directory" "d" #'gemini-cli-start-in-directory
+         :desc "Continue conversation" "C" #'gemini-cli-continue
+         :desc "Resume session" "R" #'gemini-cli-resume
+         :desc "New instance" "i" #'gemini-cli-new-instance
+         :desc "Kill Gemini" "k" #'gemini-cli-kill
+         :desc "Kill all instances" "K" #'gemini-cli-kill-all
+         :desc "Send command" "s" #'gemini-cli-send-command
+         :desc "Send command with context" "x" #'gemini-cli-send-command-with-context
+         :desc "Send region/buffer" "r" #'gemini-cli-send-region
+         :desc "Send buffer file" "o" #'gemini-cli-send-buffer-file
+         :desc "Fix error at point" "e" #'gemini-cli-fix-error-at-point
+         :desc "Toggle window" "t" #'gemini-cli-toggle
+         :desc "Switch to buffer" "b" #'gemini-cli-switch-to-buffer
+         :desc "Select buffer" "B" #'gemini-cli-select-buffer
+         :desc "Toggle read-only" "z" #'gemini-cli-toggle-read-only-mode
+         :desc "Cycle mode" "M" #'gemini-cli-cycle-mode
+         :desc "Transient menu" "m" #'gemini-cli-transient
+         :desc "Slash commands" "/" #'gemini-cli-slash-commands
+         :desc "Fork conversation" "f" #'gemini-cli-fork
+         :desc "Send return" "y" #'gemini-cli-send-return
+         :desc "Send escape" "n" #'gemini-cli-send-escape
+         :desc "Send 1" "1" #'gemini-cli-send-1
+         :desc "Send 2" "2" #'gemini-cli-send-2
+         :desc "Send 3" "3" #'gemini-cli-send-3))
+
+  ;; Optional: Configure window display (side window on right)
+  (add-to-list 'display-buffer-alist
+               '("^\\*gemini"
+                 (display-buffer-in-side-window)
+                 (side . right)
+                 (window-width . 90)))
+
+  ;; Optional: Enable auto-revert for files modified by Gemini
+  ;; (global-auto-revert-mode 1)
+
+  ;; Optional: Increase vterm scrollback for long conversations
+  (add-hook 'gemini-cli-start-hook
+            (lambda ()
+              (when (eq gemini-cli-terminal-backend 'vterm)
+                (setq-local vterm-max-scrollback 100000)))))
+
+;; (use-package! claudemacs
+;;   :defer t
+;;   :commands (claudemacs claudemacs-transient-menu)
+;;   :init
+;;   (setq claudemacs-program "ccr"
+;;         claudemacs-program-switches '("code" "--dangerously-skip-permissions")
+;;         claudemacs-default-tool 'claude
+;;         claudemacs-prefer-projectile-root t)
+;;   :config
+;;   (map! :map prog-mode-map
+;;         "C-c C-e" #'claudemacs-transient-menu)
+;;   (map! :map emacs-lisp-mode-map
+;;         "C-c C-e" #'claudemacs-transient-menu)
+;;   (map! :map text-mode-map
+;;         "C-c C-e" #'claudemacs-transient-menu)
+;;   (after! python
+;;     (map! :map python-base-mode-map
+;;           "C-c C-e" #'claudemacs-transient-menu))
+;;   (after! eat
+;;     (setq eat-term-scrollback-size 400000)
+;;     (add-hook 'eat-mode-hook
+;;               (lambda ()
+;;                 (setq-local show-trailing-whitespace nil))))
+;;   (map! :leader
+;;         (:prefix ("C" . "claude-code")
+;;          :desc "Claudemacs menu" "E" #'claudemacs-transient-menu)))

core.el

@@ -12,6 +12,9 @@
   (setq super-save-auto-save-when-idle t)
   (setq super-save-idle-duration 1))
 
+;; Which-key: show keybindings faster
+(setq which-key-idle-delay 0.01
+      which-key-min-display-time 0.1)
 
 ;; Search bindings for consult-line
 (map!
@@ -19,4 +22,4 @@
  :n "M-s" (lambda () (interactive) (consult-line (thing-at-point 'symbol)))
  :n "C-S-s" #'consult-line-multi)
 
-(setq-default show-trailing-whitespace t)
+(setq-default show-trailing-whitespace nil)

development.el

@@ -144,3 +144,8 @@
   (setq lsp-clients-clangd-executable "clangd")
   (setq lsp-clients--clangd-default-executable "clangd")
   (setq lsp-clangd-binary-path "clangd"))
+
+;; Justfile mode (psibi/justl.el)
+(use-package! justl
+  :config
+  (map! :n "e" 'justl-exec-recipe))

init.el

@@ -48,6 +48,7 @@
        ;;unicode           ; extended unicode support for various languages
        (vc-gutter +pretty) ; vcs diff in the fringe
        vi-tilde-fringe   ; fringe tildes to mark beyond EOB
+       (which-key +popup) ; key binding popups
        window-select     ; visually switch windows
        workspaces        ; tab emulation, persistence & separate workspaces
        zen               ; distraction-free coding or writing

packages.el

@@ -47,13 +47,32 @@
 
 (package! consult)
 
+(package! popup)
+
 (package! claude-code
   :recipe (:host github :repo "stevemolitor/claude-code.el" :branch "main" :depth 1
            :files ("*.el" (:exclude "images/*"))))
 
+(package! gemini-cli
+  :recipe (:host github :repo "linchen2chris/gemini-cli.el" :branch "main"
+           :files ("*.el" (:exclude "demo.gif"))))
+
 (package! claudemacs
   :recipe (:host github :repo "cpoile/claudemacs"))
 
+;; Terminal emulator
+(package! eat
+  :recipe (:host codeberg
+           :repo "akib/emacs-eat"
+           :files ("*.el" ("term" "term/*.el") "*.texi"
+                   "*.ti" ("terminfo/e" "terminfo/e/*")
+                   ("terminfo/65" "terminfo/65/*")
+                   ("integration" "integration/*")
+                   (:exclude ".dir-locals.el" "*-tests.el"))))
+
+;; Justfile mode
+(package! justl :recipe (:host github :repo "psibi/justl.el"))
+
 ;; Usage metrics and key tracking
 (package! keyfreq)
 (package! command-log-mode)

theme.el

@@ -9,11 +9,14 @@
 
 (use-package! ewal-doom-themes
   :config
-  (load-theme 'ewal-doom-one t)
+  ;; (load-theme 'ewal-doom-one t)
-  (enable-theme 'ewal-doom-one))
+  ;;(enable-theme 'ewal-doom-one)
+  )
 
 ;; Set the theme to ewal-doom-one
-(setq doom-theme 'ewal-doom-one)
+;; (setq doom-theme 'ewal-doom-one)
+(load-theme 'doom-one t)
+(setq doom-theme 'doom-one)
 
 ;; Previous base16 config (commented out)
 ;; (setq base16-distinct-fringe-background t