local function split_sentences_paragraph()
    -- save cursor and window view
    local view = vim.fn.winsaveview()

    -- find the paragraph boundaries
    local start_line = vim.fn.search('^\\s*$', 'bnW') + 1
    if start_line == 1 then start_line = 1 end
    local end_line = vim.fn.search('^\\s*$', 'nW') - 1
    if end_line < start_line then end_line = vim.fn.line('$') end

    -- build a range and run substitute with 'e' flag
    local cmd = string.format("%d,%ds/\\([.?!]\\)\\s\\+/\\1\r/ge", start_line, end_line)
    vim.cmd(cmd)

    -- restore cursor
    vim.fn.winrestview(view)
end

-- run after leaving insert mode
vim.api.nvim_create_autocmd({ "InsertLeave", "TextChanged" }, {
    callback = split_sentences_paragraph
})