diff --git a/lazy-lock.json b/lazy-lock.json
--- a/lazy-lock.json
+++ b/lazy-lock.json
@@ -1,6 +1,6 @@
 {
   "LazyVim": { "branch": "main", "commit": "dc1ffa5bcb66f46284f91a8593dda5c7c54a1824" },
-  "SchemaStore.nvim": { "branch": "main", "commit": "0a900e539511a4461701f241278626ce6ec8d331" },
+  "SchemaStore.nvim": { "branch": "main", "commit": "caad5439cc80809be7475b625a5e36d1bb06cc7e" },
   "blame.nvim": { "branch": "main", "commit": "d5f4ad5c8ebca3caecc773dda5983709c5a5da8f" },
   "blink-cmp-dictionary": { "branch": "master", "commit": "43b701fe9728a704bc63e4667c5d8b398bf129b2" },
   "blink-cmp-git": { "branch": "master", "commit": "e3ad0ffaaa3b3b7e2158cc72cd6dad2d19842c46" },
@@ -33,8 +33,8 @@
   "mini.icons": { "branch": "main", "commit": "284798619aed9f4c1ac1b9417b9a5e3b4b85ef3a" },
   "mini.pairs": { "branch": "main", "commit": "b9aada8c0e59f2b938e98fbf4eae0799eba96ad9" },
   "mini.surround": { "branch": "main", "commit": "444e155147e2b5159dd28a65f9736254c16cb817" },
-  "neotest": { "branch": "master", "commit": "2cf3544fb55cdd428a9a1b7154aea9c9823426e8" },
-  "neotest-golang": { "branch": "main", "commit": "a1811854245b599737a7dfc9978ab74040f40e62" },
+  "neotest": { "branch": "master", "commit": "7166dc36af2760a76479e021e0521e23f62165f1" },
+  "neotest-golang": { "branch": "main", "commit": "e207f660292cd0e899bd021b74422de9139f2825" },
   "neotest-python": { "branch": "master", "commit": "7cab6e2ecc260bf61b97ca147574a470bd880cbd" },
   "neotest-zig": { "branch": "main", "commit": "de63f3b9a182d374d2e71cf44385326682ec90e7" },
   "noice.nvim": { "branch": "main", "commit": "38c702be0d8fea81527ee6a73e1e834e72481193" },
@@ -46,25 +46,25 @@
   "nvim-dap-ui": { "branch": "master", "commit": "cf91d5e2d07c72903d052f5207511bf7ecdb7122" },
   "nvim-dap-virtual-text": { "branch": "master", "commit": "fbdb48c2ed45f4a8293d0d483f7730d24467ccb6" },
   "nvim-lint": { "branch": "master", "commit": "9da1fb942dd0668d5182f9c8dee801b9c190e2bb" },
-  "nvim-lspconfig": { "branch": "master", "commit": "cc2f5f2fa28d240574808e78847978ed6ef20d2a" },
+  "nvim-lspconfig": { "branch": "master", "commit": "ac98db2f9f06a56498ec890a96928774eae412c3" },
   "nvim-nio": { "branch": "master", "commit": "21f5324bfac14e22ba26553caf69ec76ae8a7662" },
-  "nvim-treesitter": { "branch": "main", "commit": "de003000a287c501a6650a1ddd3be80ee34278d4" },
+  "nvim-treesitter": { "branch": "main", "commit": "0606c7a9dcaa5c5beee0b0f09043e9fdd1ba0a68" },
   "nvim-treesitter-textobjects": { "branch": "main", "commit": "1b2d85d3de6114c4bcea89ffb2cd1ce9e3a19931" },
   "nvim-ts-autotag": { "branch": "main", "commit": "c4ca798ab95b316a768d51eaaaee48f64a4a46bc" },
-  "obsidian.nvim": { "branch": "main", "commit": "906fa5481812d05f7c428468fe244c5f991e3e83" },
+  "obsidian.nvim": { "branch": "main", "commit": "6b2a22a74d1c883e797764c28f75aa6b532a1ae4" },
   "octo.nvim": { "branch": "master", "commit": "fded71669b61c6ccae9d8ade30f667c3c4962b48" },
-  "one-small-step-for-vimkind": { "branch": "main", "commit": "99c22f1fa83eb9aa442cf13a23aed7197a2d4456" },
+  "one-small-step-for-vimkind": { "branch": "main", "commit": "c7c7aa7d764ecdf95181916dbb3f5c56b674ed9e" },
   "orphans.nvim": { "branch": "main", "commit": "35f995fbb04b679b7d829072d7209a2117c15adf" },
   "persistence.nvim": { "branch": "main", "commit": "51eef57272742b773468949f6bd0503ec3f83874" },
   "plenary.nvim": { "branch": "master", "commit": "b9fd5226c2f76c951fc8ed5923d85e4de065e509" },
   "project.nvim": { "branch": "main", "commit": "8c6bad7d22eef1b71144b401c9f74ed01526a4fb" },
   "render-markdown.nvim": { "branch": "main", "commit": "d53856423be5ef3c267d26ee261b0981b372f718" },
-  "rustaceanvim": { "branch": "master", "commit": "25de2236be57cb061854bcaaf3de6707530ab792" },
-  "sidekick.nvim": { "branch": "main", "commit": "819470b18c8d3a8a8fec4598ed418ef6d0fdfa9a" },
-  "snacks.nvim": { "branch": "main", "commit": "94f10539a64f86a30c212fc3cc3be9cc7145317e" },
+  "rustaceanvim": { "branch": "master", "commit": "2f5afad4fc62c609dfd2ef4613999a0e8bddcccc" },
+  "sidekick.nvim": { "branch": "main", "commit": "d679927f2f7b0550cb5b36077058ad9a335c7b04" },
+  "snacks.nvim": { "branch": "main", "commit": "b8d838d8be274c8eecced4306cca15378cde9830" },
   "text-case.nvim": { "branch": "main", "commit": "e898cfd46fa6cde0e83abb624a16e67d2ffc6457" },
   "todo-comments.nvim": { "branch": "main", "commit": "19d461ddd543e938eb22505fb03fa878800270b6" },
-  "tokyonight.nvim": { "branch": "main", "commit": "00d92e6009671493fceeb0e4baf644f5b983e6e4" },
+  "tokyonight.nvim": { "branch": "main", "commit": "d14614cbfc63b6037bfccd48bb982d2ad2003352" },
   "trouble.nvim": { "branch": "main", "commit": "c098362fe603d3922095e7db595961e020bdf2d0" },
   "ts-comments.nvim": { "branch": "main", "commit": "217ab9cc137fceb6659b53790bd25e608219abe1" },
   "venv-selector.nvim": { "branch": "main", "commit": "7fff64b5b1455207b9a9fd2ae8697cf9ac0b2a2d" },
diff --git a/lua/config/keymaps.lua b/lua/config/keymaps.lua
--- a/lua/config/keymaps.lua
+++ b/lua/config/keymaps.lua
@@ -75,3 +75,35 @@
 map("t", "<D-j>", "<cmd>close<cr>", { desc = "Hide Terminal" })
 
 map("n", "<leader>cD", "<cmd>%s/\\s\\+$//e<cr>", { desc = "Delete trailing spaces" })
+
+-- Toggle harper_ls (spelling checker)
+local harper_ls_active = false
+map("n", "<leader>cs", function()
+  local clients = vim.lsp.get_clients({ name = "harper_ls" })
+  if #clients > 0 then
+    -- Stop harper_ls
+    for _, client in ipairs(clients) do
+      client.stop()
+    end
+    harper_ls_active = false
+    vim.notify("Harper LSP stopped", vim.log.levels.INFO)
+  else
+    -- Start harper_ls
+    vim.cmd("LspStart harper_ls")
+    harper_ls_active = true
+    vim.notify("Harper LSP started", vim.log.levels.INFO)
+  end
+end, { desc = "Toggle spelling" })
+
+local function undotree()
+  vim.cmd(":packadd nvim.undotree")
+  local close = require("undotree").open({
+    title = "undotree",
+    command = "topright 30vnew",
+  })
+  if not close then
+    vim.bo.filetype = "undotree"
+  end
+end
+
+vim.api.nvim_create_user_command("Undotree", undotree, {})
diff --git a/lua/config/utils.lua b/lua/config/utils.lua
--- a/lua/config/utils.lua
+++ b/lua/config/utils.lua
@@ -45,9 +45,9 @@
   -- Use dd command to copy with elevated privileges
   local cmd = string.format("dd if=%s of=%s bs=1048576", vim.fn.shellescape(tmpfile), vim.fn.shellescape(filepath))
   -- Write current buffer to temporary file
-  vim.api.nvim_exec(string.format("write! %s", tmpfile), true)
+  vim.api.nvim_exec2(string.format("write! %s", tmpfile), { output = true })
   -- Execute dd command with sudo and handle result
-  if M.sudo_exec(cmd) then
+  if M.sudo_exec(cmd, false) then
     print(string.format('\r\n"%s" written', filepath))
     vim.cmd("e!") -- Reload the buffer to reflect changes
   end
diff --git a/lua/plugins/lspconfig.lua b/lua/plugins/lspconfig.lua
--- a/lua/plugins/lspconfig.lua
+++ b/lua/plugins/lspconfig.lua
@@ -19,5 +19,13 @@
       },
     })
     opts.servers.golangci_lint_ls = {}
+    opts.servers.harper_ls = {}
+
+    -- Setup function to prevent harper_ls from autostarting
+    opts.setup = opts.setup or {}
+    opts.setup.harper_ls = function(_, server_opts)
+      -- Don't setup harper_ls automatically
+      return true
+    end
   end,
 }
diff --git a/lua/plugins/mason.lua b/lua/plugins/mason.lua
--- a/lua/plugins/mason.lua
+++ b/lua/plugins/mason.lua
@@ -4,8 +4,9 @@
   "mason-org/mason.nvim",
   opts = {
     ensure_installed = {
-      "ruff",    -- Python linting and formatting
+      "ruff", -- Python linting and formatting
       "sqlfluff", -- SQL linting and formatting
+      "harper-ls", -- Spelling and grammar checking
     },
   },
 }
diff --git a/lua/plugins/url-to-markdown.lua b/lua/plugins/url-to-markdown.lua
new file mode 100644
--- /dev/null
+++ b/lua/plugins/url-to-markdown.lua
@@ -0,0 +1,12 @@
+-- URL to Markdown converter plugin
+return {
+  name = "url-to-markdown",
+  dir = vim.fn.stdpath("config"),
+  config = function()
+    local url_to_markdown = require("utils.url-to-markdown")
+    url_to_markdown.setup({
+      keybind = "<D-S-a>", -- Cmd+Shift+A
+    })
+  end,
+  filetype = { "markdown", "mdx" },
+}
diff --git a/lua/utils/url-to-markdown.lua b/lua/utils/url-to-markdown.lua
new file mode 100644
--- /dev/null
+++ b/lua/utils/url-to-markdown.lua
@@ -0,0 +1,135 @@
+-- url-to-markdown.lua
+-- Converts URLs to markdown links with fetched page titles (async)
+
+local M = {}
+
+-- Track active conversions
+local active_conversions = {}
+
+-- Fetch title from URL asynchronously
+local function fetch_title_async(url, callback)
+  local curl_cmd = {
+    "curl",
+    "-sL",
+    "--max-time",
+    "10", -- 10 second timeout
+    url,
+  }
+
+  vim.system(curl_cmd, {
+    text = true,
+    timeout = 10000, -- 10 seconds
+  }, function(result)
+    vim.schedule(function()
+      if result.code == 0 and result.stdout then
+        -- Extract title from HTML
+        local title = result.stdout:match("<title[^>]*>([^<]*)</title>")
+        if title then
+          title = title:gsub("^%s+", ""):gsub("%s+$", ""):gsub("\n", " ")
+          -- Decode common HTML entities
+          title = title:gsub("&amp;", "&"):gsub("&lt;", "<"):gsub("&gt;", ">"):gsub("&quot;", '"'):gsub("&#39;", "'")
+        end
+        callback(title ~= "" and title or nil)
+      else
+        callback(nil)
+      end
+    end)
+  end)
+end
+
+-- Convert URL under cursor to markdown link
+function M.url_to_markdown()
+  local line = vim.api.nvim_get_current_line()
+  local col = vim.api.nvim_win_get_cursor(0)[2]
+  local line_num = vim.api.nvim_win_get_cursor(0)[1]
+  local buf = vim.api.nvim_get_current_buf()
+
+  -- Find URL pattern
+  local url_pattern = "https?://[%w-._~:/?#%[%]@!$&'()*+,;=%%]+"
+  local url_start, url_end = nil, nil
+
+  for start, finish in line:gmatch("()" .. url_pattern .. "()") do
+    if start - 1 <= col and col < finish - 1 then
+      url_start = start
+      url_end = finish - 1
+      break
+    end
+  end
+
+  if not url_start then
+    vim.notify("No URL found under cursor", vim.log.levels.WARN)
+    return
+  end
+
+  local url = line:sub(url_start, url_end)
+
+  -- Create unique key for this conversion
+  local conversion_key = string.format("%d:%d:%d:%s", buf, line_num, url_start, url)
+
+  -- Check if this exact conversion is already in progress
+  if active_conversions[conversion_key] then
+    vim.notify("Conversion already in progress for this URL", vim.log.levels.INFO)
+    return
+  end
+
+  -- Mark as active
+  active_conversions[conversion_key] = true
+
+  -- Show progress
+  vim.notify("Fetching title for: " .. (url:len() > 50 and url:sub(1, 50) .. "..." or url), vim.log.levels.INFO)
+
+  -- Fetch title asynchronously
+  fetch_title_async(url, function(title)
+    -- Remove from active conversions
+    active_conversions[conversion_key] = nil
+
+    -- Check if buffer and line still exist and are unchanged
+    if not vim.api.nvim_buf_is_valid(buf) then
+      vim.notify("Buffer no longer valid", vim.log.levels.WARN)
+      return
+    end
+
+    local current_line = vim.api.nvim_buf_get_lines(buf, line_num - 1, line_num, false)[1]
+    if not current_line then
+      vim.notify("Line no longer exists", vim.log.levels.WARN)
+      return
+    end
+
+    -- Check if the URL is still at the expected position
+    local current_url = current_line:sub(url_start, url_end)
+    if current_url ~= url then
+      vim.notify("URL has changed, skipping conversion", vim.log.levels.WARN)
+      return
+    end
+
+    -- Use URL as fallback title
+    if not title then
+      title = url
+      vim.notify("Could not fetch title, using URL", vim.log.levels.WARN)
+    end
+
+    -- Create markdown link
+    local md_link = string.format("[%s](%s)", title, url)
+
+    -- Replace URL with markdown link
+    local new_line = current_line:sub(1, url_start - 1) .. md_link .. current_line:sub(url_end + 1)
+    vim.api.nvim_buf_set_lines(buf, line_num - 1, line_num, false, { new_line })
+
+    vim.notify("✓ Converted to markdown link", vim.log.levels.INFO)
+  end)
+end
+
+-- Setup function
+function M.setup(opts)
+  opts = opts or {}
+
+  -- Create command
+  vim.api.nvim_create_user_command("UrlToMarkdown", M.url_to_markdown, {})
+
+  -- Optional: Set up default keybinding
+  if opts.keybind then
+    vim.keymap.set("n", opts.keybind, M.url_to_markdown, { desc = "Convert URL to markdown link" })
+  end
+end
+
+return M