Refactor plugin layout, add AI autocomplete and direnv, update docs

lua/plugins/treesitter.lua

@@ -1,6 +1,8 @@
 return {
 	"nvim-treesitter/nvim-treesitter",
-	dependencies = { "windwp/nvim-ts-autotag", "JoosepAlviste/nvim-ts-context-commentstring" },
+	dependencies = { "windwp/nvim-ts-autotag" },
+	lazy = false, -- nvim-treesitter does not support lazy-loading per docs
+	build = ":TSUpdate",
 	init = function()
 		U.cmd_executable("tree-sitter", {
 			[false] = function()
@@ -8,48 +10,70 @@ return {
 			end,
 		})
 	end,
-	event = "BufRead",
-	cmd = {
-		"TSBufDisable",
-		"TSBufEnable",
-		"TSBufToggle",
-		"TSDisable",
-		"TSEnable",
-		"TSToggle",
-		"TSInstall",
-		"TSInstallInfo",
-		"TSInstallSync",
-		"TSModuleInfo",
-		"TSUninstall",
-		"TSUpdate",
-		"TSUpdateSync",
-	},
-	opts = function()
-		local nonNixOpts = {}
+	config = function()
+		-- New nvim-treesitter API (post-rewrite)
+		-- Setup is optional and only needed for non-default install directory
+		local ts = require("nvim-treesitter")
+
+		-- In nix mode, parsers are provided by the nix store, no installation needed
 		if not NIX then
-			nonNixOpts = {
-				ensure_installed = "all",
-				auto_install = true,
-			}
+			-- Install common parsers (async)
+			ts.install({
+				"bash",
+				"c",
+				"css",
+				"dockerfile",
+				"go",
+				"html",
+				"javascript",
+				"json",
+				"lua",
+				"markdown",
+				"markdown_inline",
+				"nix",
+				"python",
+				"rust",
+				"svelte",
+				"toml",
+				"tsx",
+				"typescript",
+				"vim",
+				"vimdoc",
+				"yaml",
+			})
 		end
-		return U.assign({
-			highlight = {
-				enable = true,
-				use_languagetree = true,
-				disable = function(lang, bufnr)
-					if lang == "sql" then
-						return true
-					end
-					return vim.api.nvim_buf_line_count(bufnr) > 4000
-				end,
-				additional_vim_regex_highlighting = false,
-			},
-		incremental_selection = { enable = true },
-		indent = { enable = true },
-		autotag = { enable = true },
-		}, nonNixOpts)
-	end,
-	config = function(_, opts)
-		require("nvim-treesitter.configs").setup(opts)
+
+		-- Enable treesitter highlighting for all filetypes
+		vim.api.nvim_create_autocmd("FileType", {
+			group = vim.api.nvim_create_augroup("myconfig-treesitter-highlight", { clear = true }),
+			callback = function(args)
+				local bufnr = args.buf
+				local ft = args.match
+
+				-- Skip large files
+				if vim.api.nvim_buf_line_count(bufnr) > 4000 then
+					return
+				end
+
+				-- Skip sql (often has issues)
+				if ft == "sql" then
+					return
+				end
+
+				-- Enable treesitter highlighting
+				pcall(vim.treesitter.start, bufnr)
+			end,
+		})
+
+		-- Enable treesitter-based folding
+		vim.api.nvim_create_autocmd("FileType", {
+			group = vim.api.nvim_create_augroup("myconfig-treesitter-fold", { clear = true }),
+			callback = function(args)
+				local win = vim.api.nvim_get_current_win()
+				vim.wo[win][0].foldexpr = "v:lua.vim.treesitter.foldexpr()"
+				vim.wo[win][0].foldmethod = "expr"
+				vim.wo[win][0].foldenable = false -- Start with folds open
+			end,
+		})
 	end,
 }