Add autoload autocommands for file change reload

.config/nvim/init.lua

@@ -1,6 +1,5 @@
 require("config.lazy")
 
-
 -- colorscheme
 vim.o.termguicolors = true
 vim.opt.winborder = 'rounded'
@@ -36,4 +35,25 @@ vim.cmd("set lazyredraw")
 vim.cmd("au FileType python set fileformat=unix encoding=utf-8")
 vim.cmd("au FileType markdown,tex set spell spelllang=en_us")
 
+-- ------------------------------------------------------------------------
+-- Auto‑reload buffers when files change externally
+-- ------------------------------------------------------------------------
+-- Ensure the option is enabled (already set above, but kept for clarity)
+vim.cmd("set autoread")
 
+-- Create a dedicated augroup to avoid duplicate autocommands if this file
+-- is sourced multiple times (e.g., when using :source ~/.config/nvim/init.lua).
+vim.api.nvim_create_augroup("AutoReload", { clear = true })
+
+-- Run `checktime` for the following events:
+--   * CursorHold, CursorHoldI – idle cursor, typical for auto‑check
+--   * FocusGained – when you return to Neovim from another app
+--   * BufEnter   – when you jump to a buffer that may already be stale
+vim.api.nvim_create_autocmd(
+    { "CursorHold", "CursorHoldI", "FocusGained", "BufEnter" },
+    {
+        group = "AutoReload",
+        pattern = "*",
+        command = "silent! checktime",
+    }
+)