return {
    'nvim-treesitter/nvim-treesitter',
    branch = 'main',
    lazy = false,
    build = ':TSUpdate',
    config = function()
        -- Old `ensure_installed`
        require('nvim-treesitter').install({
            -- Neovim config
            'lua', 'vim', 'vimdoc', 'query',

            -- Rust
            'rust', 'toml',

            -- Ansible
            'yaml',

            -- Frontend stuff
            'html', 'css', 'javascript', 'typescript', 'tsx', 'json',

            -- Low level stuff
            'c', 'asm',
        })

        -- Old `auto_install`
        local ts_autoinstall_group = vim.api.nvim_create_augroup('TSAutoInstall', { clear = true })
        vim.api.nvim_create_autocmd('FileType', {
            group = ts_autoinstall_group,
            callback = function(args)
                -- Skip UI/special buffers (file explorers, help, terminals, quickfix, ecc.)
                if vim.bo[args.buf].buftype ~= '' then
                    return
                end

                local lang = vim.treesitter.language.get_lang(args.match) or args.match

                -- Try starting right away: if it works, the parser was already installed
                if pcall(vim.treesitter.start, args.buf, lang) then
                    return
                end

                -- Didn't work: download the parser in the background
                local ok = pcall(function()
                    require('nvim-treesitter').install({ lang }, { summary = false })
                end)
                if not ok then return end

                -- Poll (non-blocking) until start() succeeds, or give up after 9s
                local function try_start(attempts)
                    attempts = attempts or 0
                    if pcall(vim.treesitter.start, args.buf, lang) then
                        return
                    elseif attempts < 30 then
                        vim.defer_fn(function() try_start(attempts + 1) end, 300)
                    end
                end
                try_start()
            end,
        })
    end,
}