Neovim config: live markdown preview with auto-prompt on file open

init.lua

-- Options (migrated from init.vim)
vim.opt.number = true
vim.opt.colorcolumn = "80"
vim.opt.clipboard = "unnamedplus"
vim.opt.cursorline = true
vim.opt.textwidth = 80

-- Bootstrap lazy.nvim
local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system({
    "git", "clone", "--filter=blob:none",
    "https://github.com/folke/lazy.nvim.git",
    "--branch=stable", lazypath,
  })
end
vim.opt.rtp:prepend(lazypath)

-- Prompt to preview when opening a markdown file
vim.api.nvim_create_autocmd("FileType", {
  pattern = "markdown",
  callback = function()
    vim.schedule(function()
      local choice = vim.fn.confirm("Open Markdown Preview?", "&Yes\n&No", 2)
      if choice == 1 then
        require("lazy").load({ plugins = { "markdown-preview.nvim" } })
        vim.fn["mkdp#util#open_preview_page"]()
      end
    end)
  end,
})

-- Plugins
require("lazy").setup({
  {
    "iamcco/markdown-preview.nvim",
    cmd = { "MarkdownPreview", "MarkdownPreviewToggle", "MarkdownPreviewStop" },
    build = "cd app && npm install",
  },
})

INSTRUCTIONS.md

Neovim Live Markdown Preview

Whenever you open a .md file, Neovim will prompt you to open a live preview in your browser. The preview syncs to your buffer as you type.

Requirements

• Neovim 0.12+
• Git
• Node.js

Setup

1. Back up your existing config (if you have one):

   mv ~/.config/nvim/init.vim ~/.config/nvim/init.vim.bak
   

2. Create ~/.config/nvim/init.lua with the contents of init.lua in this gist.

   The options block at the top reflects my personal settings — adjust or remove them as you like.

3. Open Neovim — lazy.nvim will install itself and the plugin automatically on first launch.

4. Open any .md file — you'll be prompted:

   Open Markdown Preview? [Y]es, (N)o:
   

   Press y to open a synced browser preview, n or Enter to skip.

Manual commands

Once the plugin is loaded you can also control the preview directly:

Command	Action
:MarkdownPreview	Open preview
:MarkdownPreviewStop	Close preview
:MarkdownPreviewToggle	Toggle preview