diff --git a/lua/astrocommunity/editing-support/nvim-regexplainer/nvim-regexplainer.lua b/lua/astrocommunity/editing-support/nvim-regexplainer/nvim-regexplainer.lua
index d46f1aff8..0465019fa 100644
--- a/lua/astrocommunity/editing-support/nvim-regexplainer/nvim-regexplainer.lua
+++ b/lua/astrocommunity/editing-support/nvim-regexplainer/nvim-regexplainer.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "bennypowers/nvim-regexplainer",
@@ -15,7 +16,7 @@ return {
         return
       end
       -- Add the "regex" parser to opts.ensure_installed.
-      table.insert(opts.ensure_installed, "regex")
+      utils.list_insert_unique(opts.ensure_installed, "regex")
     end,
   },
 }
diff --git a/lua/astrocommunity/pack/bash/bash.lua b/lua/astrocommunity/pack/bash/bash.lua
index 03da72bad..27c8db251 100644
--- a/lua/astrocommunity/pack/bash/bash.lua
+++ b/lua/astrocommunity/pack/bash/bash.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
@@ -9,7 +10,7 @@ return {
         return
       end
       -- Add the "julia" and "toml" language to opts.ensure_installed.
-      table.insert(opts.ensure_installed, "bash")
+      utils.list_insert_unique(opts.ensure_installed, "bash")
     end,
   },
   {
@@ -18,7 +19,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add julia lsp and toml lsp to ensure_installed
-      table.insert(opts.ensure_installed, "bashls")
+      utils.list_insert_unique(opts.ensure_installed, "bashls")
     end,
   },
   {
@@ -27,7 +28,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add julia lsp and toml lsp to ensure_installed
-      vim.list_extend(opts.ensure_installed, { "shellcheck", "shfmt" })
+      utils.list_insert_unique(opts.ensure_installed, { "shellcheck", "shfmt" })
     end,
   },
   {
@@ -36,7 +37,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add julia lsp and toml lsp to ensure_installed
-      table.insert(opts.ensure_installed, "bash")
+      utils.list_insert_unique(opts.ensure_installed, "bash")
     end,
   },
 }
diff --git a/lua/astrocommunity/pack/go/go.lua b/lua/astrocommunity/pack/go/go.lua
index 1decb057c..a1efe00bd 100644
--- a/lua/astrocommunity/pack/go/go.lua
+++ b/lua/astrocommunity/pack/go/go.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   -- Golang support
   {
@@ -10,7 +11,7 @@ return {
         return
       end
       -- Add the "go" language to opts.ensure_installed.
-      table.insert(opts.ensure_installed, "go")
+      utils.list_insert_unique(opts.ensure_installed, "go")
     end,
   },
 
@@ -20,7 +21,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add go lsps to opts.ensure_installed using vim.list_extend.
-      vim.list_extend(opts.ensure_installed, { "gomodifytags", "gofumpt", "iferr", "impl", "goimports" })
+      utils.list_insert_unique(opts.ensure_installed, { "gomodifytags", "gofumpt", "iferr", "impl", "goimports" })
     end,
   },
   {
@@ -28,7 +29,7 @@ return {
     opts = function(_, opts)
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
-      table.insert(opts.ensure_installed, "gopls")
+      utils.list_insert_unique(opts.ensure_installed, "gopls")
     end,
   },
   {
@@ -42,14 +43,14 @@ return {
         opts = function(_, opts)
           -- Ensure that opts.ensure_installed exists and is a table.
           if not opts.ensure_installed then opts.ensure_installed = {} end
-          table.insert(opts.ensure_installed, "delve")
+          utils.list_insert_unique(opts.ensure_installed, "delve")
         end,
       },
     },
   },
   {
     "olexsmir/gopher.nvim",
-    init = function() table.insert(astronvim.lsp.skip_setup, "gopls") end,
+    init = function() utils.list_insert_unique(astronvim.lsp.skip_setup, "gopls") end,
     opts = function() return { server = require("astronvim.utils.lsp").config "gopls" } end,
     ft = "go",
     dependencies = {
diff --git a/lua/astrocommunity/pack/json/json.lua b/lua/astrocommunity/pack/json/json.lua
index bda626638..9232373e2 100644
--- a/lua/astrocommunity/pack/json/json.lua
+++ b/lua/astrocommunity/pack/json/json.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
@@ -8,7 +9,7 @@ return {
       elseif opts.ensure_installed == "all" then
         return
       end
-      vim.list_extend(opts.ensure_installed, { "json", "jsonc" })
+      utils.list_insert_unique(opts.ensure_installed, { "json", "jsonc" })
     end,
   },
   {
@@ -16,7 +17,16 @@ return {
     opts = function(_, opts)
       -- Ensure that opts.ensure_installed exists and is a table
       if not opts.ensure_installed then opts.ensure_installed = {} end
-      table.insert(opts.ensure_installed, "jsonls")
+      utils.list_insert_unique(opts.ensure_installed, "jsonls")
+    end,
+  },
+  {
+    "jay-babu/mason-null-ls.nvim",
+    opts = function(_, opts)
+      -- Ensure that opts.ensure_installed exists and is a table.
+      if not opts.ensure_installed then opts.ensure_installed = {} end
+      -- Add go lsps to opts.ensure_installed using vim.list_extend.
+      utils.list_insert_unique(opts.ensure_installed, "prettier")
     end,
   },
 }
diff --git a/lua/astrocommunity/pack/julia/julia.lua b/lua/astrocommunity/pack/julia/julia.lua
index 825a15c34..23af6808d 100644
--- a/lua/astrocommunity/pack/julia/julia.lua
+++ b/lua/astrocommunity/pack/julia/julia.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
@@ -9,7 +10,7 @@ return {
         return
       end
       -- Add the "julia" and "toml" language to opts.ensure_installed.
-      vim.list_extend(opts.ensure_installed, { "julia", "toml" })
+      utils.list_insert_unique(opts.ensure_installed, { "julia", "toml" })
     end,
   },
   {
@@ -18,7 +19,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add julia lsp and toml lsp to ensure_installed
-      vim.list_extend(opts.ensure_installed, { "julials", "taplo" })
+      utils.list_insert_unique(opts.ensure_installed, { "julials", "taplo" })
     end,
   },
   {
diff --git a/lua/astrocommunity/pack/lua/lua.lua b/lua/astrocommunity/pack/lua/lua.lua
index 4c34dc77c..47819b72f 100644
--- a/lua/astrocommunity/pack/lua/lua.lua
+++ b/lua/astrocommunity/pack/lua/lua.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
@@ -8,7 +9,7 @@ return {
       elseif opts.ensure_installed == "all" then
         return
       end
-      vim.list_extend(opts.ensure_installed, { "lua", "luap" })
+      utils.list_insert_unique(opts.ensure_installed, { "lua", "luap" })
     end,
   },
   {
@@ -16,7 +17,7 @@ return {
     opts = function(_, opts)
       -- Ensure that opts.ensure_installed exists and is a table
       if not opts.ensure_installed then opts.ensure_installed = {} end
-      table.insert(opts.ensure_installed, "lua_ls")
+      utils.list_insert_unique(opts.ensure_installed, "lua_ls")
     end,
   },
   {
@@ -24,7 +25,7 @@ return {
     opts = function(_, opts)
       -- Ensure that opts.ensure_installed exists and is a table
       if not opts.ensure_installed then opts.ensure_installed = {} end
-      table.insert(opts.ensure_installed, "stylua")
+      utils.list_insert_unique(opts.ensure_installed, "stylua")
     end,
   },
 }
diff --git a/lua/astrocommunity/pack/nix/nix.lua b/lua/astrocommunity/pack/nix/nix.lua
index 8f25b5c5d..3d6de0670 100644
--- a/lua/astrocommunity/pack/nix/nix.lua
+++ b/lua/astrocommunity/pack/nix/nix.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
@@ -9,7 +10,7 @@ return {
         return
       end
       -- Add the "nix" language to opts.ensure_installed.
-      table.insert(opts.ensure_installed, "nix")
+      utils.list_insert_unique(opts.ensure_installed, "nix")
     end,
   },
   {
@@ -17,7 +18,7 @@ return {
     opts = function(_, opts)
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
-      table.insert(opts.ensure_installed, "rnix")
+      utils.list_insert_unique(opts.ensure_installed, "rnix")
     end,
   },
   {
diff --git a/lua/astrocommunity/pack/python/python.lua b/lua/astrocommunity/pack/python/python.lua
index 92ce1aff2..2313607f1 100644
--- a/lua/astrocommunity/pack/python/python.lua
+++ b/lua/astrocommunity/pack/python/python.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
@@ -9,7 +10,7 @@ return {
         return
       end
       -- Add the "python" and "toml" language to opts.ensure_installed.
-      vim.list_extend(opts.ensure_installed, { "python", "toml" })
+      utils.list_insert_unique(opts.ensure_installed, { "python", "toml" })
     end,
   },
   {
@@ -18,7 +19,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add pyright lsp to opts.ensure_installed using table.insert.
-      vim.list_extend(opts.ensure_installed, { "pyright", "ruff_lsp" })
+      utils.list_insert_unique(opts.ensure_installed, { "pyright", "ruff_lsp" })
     end,
   },
   {
@@ -27,7 +28,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add to opts.ensure_installed using vim.list_extend.
-      vim.list_extend(opts.ensure_installed, { "isort", "black" })
+      utils.list_insert_unique(opts.ensure_installed, { "isort", "black" })
     end,
   },
   {
@@ -36,7 +37,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add to opts.ensure_installed using table.insert.
-      table.insert(opts.ensure_installed, "python")
+      utils.list_insert_unique(opts.ensure_installed, "python")
     end,
   },
   {
diff --git a/lua/astrocommunity/pack/rust/rust.lua b/lua/astrocommunity/pack/rust/rust.lua
index 7cce36ccf..e7c974e8b 100644
--- a/lua/astrocommunity/pack/rust/rust.lua
+++ b/lua/astrocommunity/pack/rust/rust.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
@@ -9,13 +10,13 @@ return {
         return
       end
       -- Add the "rust" and "toml" language to opts.ensure_installed.
-      table.insert(opts.ensure_installed, { "rust", "toml" })
+      utils.list_insert_unique(opts.ensure_installed, { "rust", "toml" })
     end,
   },
   {
     "simrat39/rust-tools.nvim",
     ft = { "rust" },
-    init = function() table.insert(astronvim.lsp.skip_setup, "rust_analyzer") end,
+    init = function() utils.list_insert_unique(astronvim.lsp.skip_setup, "rust_analyzer") end,
     opts = function() return { server = require("astronvim.utils.lsp").config "rust_analyzer" } end,
     dependencies = {
       {
@@ -23,7 +24,7 @@ return {
         opts = function(_, opts)
           -- Ensure that opts.ensure_installed exists and is a table.
           if not opts.ensure_installed then opts.ensure_installed = {} end
-          table.insert(opts.ensure_installed, "codelldb")
+          utils.list_insert_unique(opts.ensure_installed, "codelldb")
         end,
       },
     },
@@ -34,7 +35,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add rust and taplo lsps to opts.ensure_installed using vim.list_extend.
-      vim.list_extend(opts.ensure_installed, { "rust_analyzer", "taplo" })
+      utils.list_insert_unique(opts.ensure_installed, { "rust_analyzer", "taplo" })
     end,
   },
   {
diff --git a/lua/astrocommunity/pack/typescript/typescript.lua b/lua/astrocommunity/pack/typescript/typescript.lua
index 46303a32f..7a743ef31 100644
--- a/lua/astrocommunity/pack/typescript/typescript.lua
+++ b/lua/astrocommunity/pack/typescript/typescript.lua
@@ -1,3 +1,4 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
@@ -9,7 +10,7 @@ return {
         return
       end
       -- Add the required file types to opts.ensure_installed.
-      vim.list_extend(opts.ensure_installed, { "javascript", "json", "typescript", "tsx" })
+      utils.list_insert_unique(opts.ensure_installed, { "javascript", "json", "typescript", "tsx" })
     end,
   },
   {
@@ -18,7 +19,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add tsserver to opts.ensure_installed using vim.list_extend.
-      table.insert(opts.ensure_installed, "tsserver")
+      utils.list_insert_unique(opts.ensure_installed, "tsserver")
     end,
   },
   {
@@ -27,7 +28,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add to opts.ensure_installed using vim.list_extend.
-      table.insert(opts.ensure_installed, "prettier")
+      utils.list_insert_unique(opts.ensure_installed, "prettier")
     end,
   },
   {
@@ -36,7 +37,7 @@ return {
       -- Ensure that opts.ensure_installed exists and is a table.
       if not opts.ensure_installed then opts.ensure_installed = {} end
       -- Add to opts.ensure_installed using table.insert.
-      table.insert(opts.ensure_installed, "js")
+      utils.list_insert_unique(opts.ensure_installed, "js")
     end,
   },
   {
@@ -50,12 +51,9 @@ return {
     ft = { "ts", "js", "tsx", "jsx" },
     enabled = true,
     dependencies = {
-      {
-        "mxsdev/nvim-dap-vscode-js",
-        opts = { debugger_cmd = { "js-debug-adapter" }, adapters = { "pwa-node" } },
-      },
+      { "mxsdev/nvim-dap-vscode-js", opts = { debugger_cmd = { "js-debug-adapter" }, adapters = { "pwa-node" } } },
       { "theHamsta/nvim-dap-virtual-text", config = true },
-      { "rcarriga/nvim-dap-ui",            config = true },
+      { "rcarriga/nvim-dap-ui", config = true },
     },
     config = function()
       local dap = require "dap"
@@ -101,7 +99,7 @@ return {
   },
   {
     "jose-elias-alvarez/typescript.nvim",
-    init = function() table.insert(astronvim.lsp.skip_setup, "tsserver") end,
+    init = function() utils.list_insert_unique(astronvim.lsp.skip_setup, "tsserver") end,
     ft = {
       "typescript",
       "typescriptreact",
diff --git a/lua/astrocommunity/utility/noice-nvim/noice-nvim.lua b/lua/astrocommunity/utility/noice-nvim/noice-nvim.lua
index 9f9e0d5cc..c31b8c401 100644
--- a/lua/astrocommunity/utility/noice-nvim/noice-nvim.lua
+++ b/lua/astrocommunity/utility/noice-nvim/noice-nvim.lua
@@ -1,10 +1,11 @@
+local utils = require "astrocommunity.utils"
 return {
   {
     "nvim-treesitter/nvim-treesitter",
     opts = function(_, opts)
       if not opts.ensure_installed then opts.ensure_installed = {} end
       if type(opts.ensure_installed) == "table" then
-        vim.list_extend(opts.ensure_installed, { "bash", "markdown", "markdown_inline", "regex", "vim" })
+        utils.list_insert_unique(opts.ensure_installed, { "bash", "markdown", "markdown_inline", "regex", "vim" })
       end
       return opts
     end,
diff --git a/lua/astrocommunity/utils.lua b/lua/astrocommunity/utils.lua
new file mode 100644
index 000000000..dbc686140
--- /dev/null
+++ b/lua/astrocommunity/utils.lua
@@ -0,0 +1,10 @@
+local M = {}
+
+function M.list_insert_unique(tbl, vals)
+  if type(vals) ~= "table" then vals = { vals } end
+  for _, val in ipairs(vals) do
+    if not vim.tbl_contains(tbl, val) then table.insert(tbl, val) end
+  end
+end
+
+return M