diff --git a/lazy-lock.json b/lazy-lock.json
index 8269fcb..00576a2 100644
--- a/lazy-lock.json
+++ b/lazy-lock.json
@@ -1,30 +1,53 @@
 {
   "Comment.nvim": { "branch": "master", "commit": "38d3b7eb553872d8866f14a0dd4fe84126068fce" },
+  "LuaSnip": { "branch": "master", "commit": "e77fa9ad0b1f4fc6cddf54e51047e17e90c7d7ed" },
   "alpha-nvim": { "branch": "main", "commit": "87c204040e3f5d4c1c95067b35905d8f8a2f2545" },
   "barbar.nvim": { "branch": "master", "commit": "488bbaa3b5455f4b776a61f2b8d10f8f798604c0" },
   "bigfile.nvim": { "branch": "main", "commit": "c1bad34ce742b4f360b67ca23c873fef998240fc" },
+  "cmp-buffer": { "branch": "main", "commit": "3022dbc9166796b644a841a02de8dd1cc1d311fa" },
+  "cmp-cmdline": { "branch": "main", "commit": "5af1bb7d722ef8a96658f01d6eb219c4cf746b32" },
+  "cmp-nvim-lsp": { "branch": "main", "commit": "0e6b2ed705ddcff9738ec4ea838141654f12eeef" },
+  "cmp-nvim-lua": { "branch": "main", "commit": "f12408bdb54c39c23e67cab726264c10db33ada8" },
+  "cmp-path": { "branch": "main", "commit": "91ff86cd9c29299a64f968ebb45846c485725f23" },
+  "cmp_luasnip": { "branch": "master", "commit": "18095520391186d634a0045dacaa346291096566" },
+  "cosmic-ui": { "branch": "main", "commit": "c0b14531999f2bfef3d927c4dcd57a1a8fed5ee9" },
   "diffview.nvim": { "branch": "main", "commit": "8c1702470fd5186cb401b21f9bf8bdfad6d5cc87" },
   "filetype.nvim": { "branch": "main", "commit": "b522628a45a17d58fc0073ffd64f9dc9530a8027" },
+  "friendly-snippets": { "branch": "main", "commit": "631f79e346b0b3203d2ce3eae619ca8d612e5463" },
   "git-blame.nvim": { "branch": "master", "commit": "06c20ea71a4519fc60caba9ac688f2f6404f03d5" },
   "gitsigns.nvim": { "branch": "main", "commit": "e5edefd9976039f5352e0c900f35206770b33a2d" },
   "glow.nvim": { "branch": "main", "commit": "a3f24fdaa71d2c25a2b88026032b34f5b6a6e215" },
   "guess-indent.nvim": { "branch": "main", "commit": "b8ae749fce17aa4c267eec80a6984130b94f80b2" },
   "indent-blankline.nvim": { "branch": "master", "commit": "018bd04d80c9a73d399c1061fa0c3b14a7614399" },
   "lazy.nvim": { "branch": "main", "commit": "bb5cc9ef3bbb17541929b745f74551c900188099" },
+  "lsp_signature.nvim": { "branch": "master", "commit": "9616a1adde75a108495dd97ec8bb46f908d552e7" },
   "lualine.nvim": { "branch": "master", "commit": "84ffb80e452d95e2c46fa29a98ea11a240f7843e" },
+  "mason-lspconfig.nvim": { "branch": "main", "commit": "43f2ddf0b5f544d9bb20e24b8ff76b79f2a07ab0" },
+  "mason.nvim": { "branch": "main", "commit": "057ac5ca159c83e302a55bd839a96ff1ea2396db" },
   "neo-tree.nvim": { "branch": "v2.x", "commit": "8d485aab32da9b8841d4af977f992b82b14af469" },
+  "neodev.nvim": { "branch": "main", "commit": "7e3f718f43de41053f77b1e8de6de2b759fc4023" },
   "nui.nvim": { "branch": "main", "commit": "ecd9def93891b9260b15b5fcef542eaabf4145c9" },
+  "nvim-autopairs": { "branch": "master", "commit": "4b478a73b18967d9f9e756a71100d0e63a08690a" },
+  "nvim-cmp": { "branch": "main", "commit": "11102d3db12c7f8b35265ad0e17a21511e5b1e68" },
+  "nvim-code-action-menu": { "branch": "main", "commit": "e4399dbaf6eabff998d3d5f1cbcd8d9933710027" },
   "nvim-colorizer.lua": { "branch": "master", "commit": "dde3084106a70b9a79d48f426f6d6fec6fd203f7" },
+  "nvim-dap": { "branch": "master", "commit": "6cedcb527e264c8f25e86afa8dae74c6692dee51" },
+  "nvim-dap-go": { "branch": "main", "commit": "b4ded7de579b4e2a85c203388233b54bf1028816" },
+  "nvim-dap-ui": { "branch": "master", "commit": "286f682f366fbc652b38dff893569374e9433dd3" },
+  "nvim-lspconfig": { "branch": "master", "commit": "427378a03ffc1e1bc023275583a49b1993e524d0" },
   "nvim-treesitter": { "branch": "master", "commit": "1ca9b938c1c3d8b2c64a168f6a5419b8f3870410" },
   "nvim-ts-autotag": { "branch": "main", "commit": "40615e96075c743ef47aaf9de966dc348bec6459" },
   "nvim-ts-context-commentstring": { "branch": "main", "commit": "0bf8fbc2ca8f8cdb6efbd0a9e32740d7a991e4c3" },
   "nvim-web-devicons": { "branch": "master", "commit": "4ec26d67d419c12a4abaea02f1b6c57b40c08d7e" },
   "plenary.nvim": { "branch": "master", "commit": "9ac3e9541bbabd9d73663d757e4fe48a675bb054" },
   "smart-splits.nvim": { "branch": "master", "commit": "e1cd1ab8aac5ad36617aa887912d0d3ba7405799" },
+  "symbols-outline.nvim": { "branch": "master", "commit": "512791925d57a61c545bc303356e8a8f7869763c" },
   "telescope-fzf-native.nvim": { "branch": "main", "commit": "580b6c48651cabb63455e97d7e131ed557b8c7e2" },
   "telescope.nvim": { "branch": "master", "commit": "713d26b98583b160b50fb827adb751f768238ed3" },
   "todo-comments.nvim": { "branch": "main", "commit": "8febc60a76feefd8203077ef78b6a262ea1a41f9" },
   "toggleterm.nvim": { "branch": "main", "commit": "026dff5e2b504941cf172691561a67ea362596aa" },
   "tokyonight.nvim": { "branch": "main", "commit": "c5df636ce62a8aab7565f35da143cfd672526302" },
+  "trouble.nvim": { "branch": "main", "commit": "d56bfc0c501ced4002a57cb60433362fb2ce9c4d" },
+  "vim-illuminate": { "branch": "master", "commit": "a2907275a6899c570d16e95b9db5fd921c167502" },
   "vim-matchup": { "branch": "master", "commit": "1e276be9306490e439784cf5e8abe1f93b4a41b6" }
 }
\ No newline at end of file
diff --git a/lua/plugins/blankline.lua b/lua/plugins/blankline.lua
index fd6f580..02f12b0 100644
--- a/lua/plugins/blankline.lua
+++ b/lua/plugins/blankline.lua
@@ -1,6 +1,5 @@
 return {
     "lukas-reineke/indent-blankline.nvim",
-    event = "BufEnter",
     opts = {
         char = "▏",
         context_char = "▏",
diff --git a/lua/plugins/cmp.lua b/lua/plugins/cmp.lua
new file mode 100644
index 0000000..dc28d04
--- /dev/null
+++ b/lua/plugins/cmp.lua
@@ -0,0 +1,55 @@
+return {
+    "hrsh7th/nvim-cmp",
+    dependencies = {
+        "hrsh7th/cmp-nvim-lsp",
+        "saadparwaiz1/cmp_luasnip",
+        "hrsh7th/cmp-buffer",
+        "hrsh7th/cmp-path",
+        "hrsh7th/cmp-cmdline",
+        "hrsh7th/cmp-nvim-lua"
+    },
+    event = { "InsertEnter", "CmdlineEnter" },
+    config = function()
+        local cmp = require("cmp")
+
+        cmp.setup {
+            snippet = {
+                expand = function(args)
+                    require("luasnip").lsp_expand(args.body)
+                end
+            },
+
+            mapping = cmp.mapping.preset.insert({
+                ["<C-b>"] = cmp.mapping.scroll_docs(-4),
+                ["<C-f>"] = cmp.mapping.scroll_docs(4),
+                ["<C-Space>"] = cmp.mapping.complete(),
+                ["<C-e>"] = cmp.mapping.abort(),
+                ["<CR>"] = cmp.mapping.confirm({ select = true }),
+                ["<Tab>"] = cmp.mapping.select_next_item(),
+                ["<S-Tab>"] = cmp.mapping.select_prev_item()
+            }),
+
+            sources = cmp.config.sources({
+                { name = "nvim_lsp" },
+                { name = "luasnip" }
+            }, {
+                { name = "buffer" },
+                { name = "path" }
+            })
+        }
+
+        cmp.setup.cmdline({ "/", "?" }, {
+            mapping = cmp.mapping.preset.cmdline(),
+            sources = { name = "buffer" }
+        })
+
+        cmp.setup.cmdline(":", {
+            mapping = cmp.mapping.preset.cmdline(),
+            sources = cmp.config.sources({
+                { name = "path" }
+            }, {
+                { name = "cmdline" }
+            })
+        })
+    end
+}
diff --git a/lua/plugins/init.lua b/lua/plugins/init.lua
index 473435f..9dfe089 100644
--- a/lua/plugins/init.lua
+++ b/lua/plugins/init.lua
@@ -6,7 +6,6 @@ return {
 
     {
         "numToStr/Comment.nvim",
-        event = "BufEnter",
         config = true
     },
 
@@ -20,8 +19,7 @@ return {
 
     {
         "andymass/vim-matchup",
-        dependencies = "nvim-treesitter/nvim-treesitter",
-        event = "BufEnter"
+        dependencies = "nvim-treesitter/nvim-treesitter"
     },
 
     {
@@ -51,5 +49,107 @@ return {
         dependencies = "nvim-lua/plenary.nvim",
         cmd = "DiffviewOpen",
         config = true
+    },
+
+    -- NOTE: LSP
+
+    {
+        "neovim/nvim-lspconfig",
+        lazy = true,
+        dependencies = {
+            { "folke/neodev.nvim", opts = { experimental = { pathStrict = true } } },
+            "williamboman/mason-lspconfig.nvim"
+        }
+    },
+
+    {
+        "williamboman/mason-lspconfig.nvim",
+        dependencies = "williamboman/mason.nvim",
+        config = function()
+            local capabilities = require("cmp_nvim_lsp").default_capabilities()
+
+            local handlers = {
+                function (server_name)
+                    require("lspconfig")[server_name].setup {
+                        capabilities = capabilities
+                    }
+                end
+            }
+
+            require("mason-lspconfig").setup { handlers = handlers }
+        end
+    },
+
+    {
+        "williamboman/mason.nvim",
+        build = ":MasonUpdate",
+        config = true
+    },
+
+    {
+        "L3MON4D3/LuaSnip",
+        dependencies = {
+            "rafamadriz/friendly-snippets",
+            config = function()
+                require("luasnip.loaders.from_vscode").lazy_load()
+            end
+        }
+    },
+
+    {
+        "windwp/nvim-autopairs",
+        event = "InsertEnter",
+        config = true
+    },
+
+    "RRethy/vim-illuminate",
+
+    {
+        "ray-x/lsp_signature.nvim",
+        dependencies = "neovim/nvim-lspconfig",
+        config = true
+    },
+
+    {
+        "simrat39/symbols-outline.nvim",
+        cmd = "SymbolsOutline",
+        config = true
+    },
+
+    {
+        "folke/trouble.nvim",
+        dependencies = "nvim-tree/nvim-web-devicons",
+        cmd = "TroubleToggle",
+        config = true
+    },
+
+    {
+        "weilbith/nvim-code-action-menu",
+        dependencies = "neovim/nvim-lspconfig",
+        cmd = "CodeActionMenu"
+    },
+
+    {
+        "CosmicNvim/cosmic-ui",
+        lazy = true,
+        dependencies = {
+            "MunifTanjim/nui.nvim",
+            "nvim-lua/plenary.nvim"
+        },
+        config = true
+    },
+
+    {
+        "rcarriga/nvim-dap-ui",
+        lazy = true,
+        dependencies = "mfussenegger/nvim-dap",
+        config = true
+    },
+
+    {
+        "leoluz/nvim-dap-go",
+        lazy = true,
+        dependencies = "mfussenegger/nvim-dap",
+        config = true
     }
 }
diff --git a/lua/plugins/neotree.lua b/lua/plugins/neotree.lua
index 04cba2c..82fc888 100644
--- a/lua/plugins/neotree.lua
+++ b/lua/plugins/neotree.lua
@@ -6,7 +6,17 @@ return {
         "MunifTanjim/nui.nvim"
     },
     cmd = "Neotree",
-    init = function() vim.g.neo_tree_remove_legacy_commands = true end,
+    init = function()
+        vim.g.neo_tree_remove_legacy_commands = true
+        vim.fn.sign_define("DiagnosticSignError",
+            {text = " ", texthl = "DiagnosticSignError"})
+        vim.fn.sign_define("DiagnosticSignWarn",
+            {text = " ", texthl = "DiagnosticSignWarn"})
+        vim.fn.sign_define("DiagnosticSignInfo",
+            {text = " ", texthl = "DiagnosticSignInfo"})
+        vim.fn.sign_define("DiagnosticSignHint",
+            {text = "", texthl = "DiagnosticSignHint"})
+    end,
     opts = {
         close_if_last_window = true,
 
diff --git a/lua/plugins/treesitter.lua b/lua/plugins/treesitter.lua
index e7f752d..c7765e9 100644
--- a/lua/plugins/treesitter.lua
+++ b/lua/plugins/treesitter.lua
@@ -1,6 +1,9 @@
 return {
     "nvim-treesitter/nvim-treesitter",
-    dependencies = { "windwp/nvim-ts-autotag", "JoosepAlviste/nvim-ts-context-commentstring" },
+    dependencies = {
+        "windwp/nvim-ts-autotag",
+        "JoosepAlviste/nvim-ts-context-commentstring"
+    },
     build = ":TSUpdate",
     config = function()
         require("nvim-treesitter.configs").setup {