perf: remove ttyfast, add grepprg/diffopt, DRY FZF commands, conditional tmux-navigator

- Remove deprecated `set ttyfast` (no-op since Vim 8)
- Add grepprg=rg for :grep → quickfix integration
- Add diffopt with histogram algorithm
- Consolidate Rg/RgWord/GFiles (24 lines → 10, lazy preview)
- Load vim-tmux-navigator only inside tmux, Ctrl+hjkl fallback outside

CHANGELOG.md

@@ -13,6 +13,12 @@
 
 ### Changed
 - Skip 2 more built-in plugins: openPlugin, manpager (10 → 12 total)
+- Remove deprecated `set ttyfast` (no-op since Vim 8)
+- Add `grepprg=rg --vimgrep` — `:grep` now uses ripgrep + quickfix
+- Add `diffopt` with histogram algorithm and indent-heuristic
+- Consolidate FZF Rg/RgWord/GFiles commands (DRY refactor)
+- vim-tmux-navigator: conditional load (only inside tmux), fallback `Ctrl+hjkl` mappings outside
+- Add `Ctrl+hjkl` window navigation fallback when tmux-navigator not loaded
 
 ## 2.1.0 — 2025-04-22
 

modules/core.vim

@@ -160,9 +160,13 @@ augroup END
 " ── Performance ─────────────────────────────────────────────────────────────
 
 set synmaxcol=200
-set ttyfast
 set lazyredraw
 set complete-=i
+
+if executable('rg')
+    set grepprg=rg\ --vimgrep\ --smart-case
+    set grepformat=%f:%l:%c:%m
+endif
 set updatetime=300
 set shortmess+=cI
 
@@ -183,6 +187,10 @@ set exrc
 set secure
 set sessionoptions=blank,buffers,curdir,folds,help,tabpages,winsize,winpos,terminal
 
+if has("patch-8.1.0360")
+    set diffopt=filler,internal,context:3,algorithm:histogram,indent-heuristic
+endif
+
 " ── Format Options ──────────────────────────────────────────────────────────
 
 augroup ChopstickFormatOptions

modules/navigation.vim

@@ -72,30 +72,27 @@ else
     let g:fzf_preview_window = ['right:50%', 'ctrl-/']
 endif
 
-if g:is_tty
-    command! -bang -nargs=* Rg
-        \ call fzf#vim#grep(
-        \   'rg --column --line-number --no-heading --color=always --smart-case -- '
-        \   .shellescape(<q-args>), 1, <bang>0)
-    command! -bang GFiles call fzf#vim#gitfiles('', <bang>0)
-else
-    command! -bang -nargs=* Rg
-        \ call fzf#vim#grep(
-        \   'rg --column --line-number --no-heading --color=always --smart-case -- '
-        \   .shellescape(<q-args>), 1, fzf#vim#with_preview(), <bang>0)
-    command! -bang GFiles call fzf#vim#gitfiles('', fzf#vim#with_preview(), <bang>0)
-endif
+function! s:Preview() abort
+    return g:is_tty ? {} : fzf#vim#with_preview()
+endfunction
 
-if g:is_tty
-    command! -bang -nargs=* RgWord
-        \ call fzf#vim#grep(
-        \   'rg --column --line-number --no-heading --color=always --smart-case -F -- '
-        \   .shellescape(expand('<cword>')), 1, <bang>0)
-else
-    command! -bang -nargs=* RgWord
-        \ call fzf#vim#grep(
-        \   'rg --column --line-number --no-heading --color=always --smart-case -F -- '
-        \   .shellescape(expand('<cword>')), 1, fzf#vim#with_preview(), <bang>0)
+command! -bang -nargs=* Rg
+    \ call fzf#vim#grep(
+    \   'rg --column --line-number --no-heading --color=always --smart-case -- '
+    \   .shellescape(<q-args>), 1, s:Preview(), <bang>0)
+command! -bang -nargs=* RgWord
+    \ call fzf#vim#grep(
+    \   'rg --column --line-number --no-heading --color=always --smart-case -F -- '
+    \   .shellescape(expand('<cword>')), 1, s:Preview(), <bang>0)
+command! -bang GFiles call fzf#vim#gitfiles('', s:Preview(), <bang>0)
+
+" ── Window Navigation ───────────────────────────────────────────────────────
+
+if empty($TMUX)
+    nnoremap <C-h> <C-w>h
+    nnoremap <C-j> <C-w>j
+    nnoremap <C-k> <C-w>k
+    nnoremap <C-l> <C-w>l
 endif
 
 " ── Window Maximize Toggle ──────────────────────────────────────────────────

modules/plugins.vim

@@ -49,6 +49,8 @@ Plug 'fatih/vim-go', { 'for': 'go' }
 Plug 'mbbill/undotree', { 'on': 'UndotreeToggle' }
 Plug 'mhinz/vim-startify'
 Plug 'lifepillar/vim-solarized8'
-Plug 'christoomey/vim-tmux-navigator'
+if !empty($TMUX)
+    Plug 'christoomey/vim-tmux-navigator'
+endif
 
 call plug#end()