diff --git a/lua/ow/lsp.lua b/lua/ow/lsp.lua
index 905e43a..59a8ffd 100644
--- a/lua/ow/lsp.lua
+++ b/lua/ow/lsp.lua
@@ -5,8 +5,19 @@ local CONFIG_DIR = vim.fn.stdpath("config") .. "/lua/ow/lsp/config"
 ---@class Server
 local Server = require("ow.lsp.server")
 
+---@class LSP
+---@field diagnostic_signs vim.diagnostic.Opts.Signs
 local M = {}
 
+M.diagnostic_signs = {
+    text = {
+        [vim.diagnostic.severity.ERROR] = "E",
+        [vim.diagnostic.severity.WARN] = "W",
+        [vim.diagnostic.severity.INFO] = "I",
+        [vim.diagnostic.severity.HINT] = "H",
+    },
+}
+
 ---@type table<string, Server>
 local servers = {}
 
@@ -125,7 +136,7 @@ end
 local function setup_diagnostics()
     vim.diagnostic.config({
         underline = true,
-        signs = true,
+        signs = M.diagnostic_signs,
         virtual_text = false,
         float = {
             show_header = false,
diff --git a/lua/ow/plugins/nvim-tree.lua b/lua/ow/plugins/nvim-tree.lua
new file mode 100644
index 0000000..7e1055b
--- /dev/null
+++ b/lua/ow/plugins/nvim-tree.lua
@@ -0,0 +1,270 @@
+local function override_highlights()
+    -- Git
+    vim.cmd.highlight({
+        "link NvimTreeGitDeletedIcon MoonflyTurquoise",
+        bang = true,
+    })
+    vim.cmd.highlight({
+        "link NvimTreeGitDirtyIcon MoonflyTurquoise",
+        bang = true,
+    })
+    vim.cmd.highlight({
+        "link NvimTreeGitIgnoredIcon Comment",
+        bang = true,
+    })
+    vim.cmd.highlight({
+        "link NvimTreeGitMergeIcon MoonflyCrimson",
+        bang = true,
+    })
+    vim.cmd.highlight({
+        "link NvimTreeGitNewIcon MoonflyOrchid",
+        bang = true,
+    })
+    vim.cmd.highlight({
+        "link NvimTreeGitRenamedIcon MoonflyTurquoise",
+        bang = true,
+    })
+    vim.cmd.highlight({
+        "link NvimTreeGitStagedIcon MoonflyGreen",
+        bang = true,
+    })
+
+    -- Bookmarks
+    vim.cmd.highlight({
+        "link NvimTreeBookmarkHL MoonflyYellowLineActive",
+        bang = true,
+    })
+
+    -- Clipboard
+    vim.cmd.highlight({
+        "link NvimTreeCutHL MoonflyRedLineActive",
+        bang = true,
+    })
+
+    -- Modified
+    vim.cmd.highlight({
+        "link NvimTreeModifiedIcon MoonflyTurquoise",
+        bang = true,
+    })
+end
+
+local function disable_highlights()
+    -- File types
+    vim.cmd.highlight({ "clear NvimTreeExecFile" })
+    vim.cmd.highlight({
+        "link NvimTreeExecFile NONE",
+        bang = true,
+    })
+    vim.cmd.highlight({ "clear NvimTreeImageFile" })
+    vim.cmd.highlight({
+        "link NvimTreeImageFile NONE",
+        bang = true,
+    })
+    vim.cmd.highlight({ "clear NvimTreeSpecialFile" })
+    vim.cmd.highlight({
+        "link NvimTreeSpecialFile NONE",
+        bang = true,
+    })
+    vim.cmd.highlight({ "clear NvimTreeSymlink" })
+    vim.cmd.highlight({
+        "link NvimTreeSymlink NONE",
+        bang = true,
+    })
+end
+
+---@type LazyPluginSpec
+return {
+    "nvim-tree/nvim-tree.lua",
+    event = "VimEnter",
+    keys = {
+        {
+            "<leader>tt",
+            function()
+                require("nvim-tree.api").tree.toggle({
+                    find_file = true,
+                    focus = false,
+                })
+            end,
+        },
+        {
+            "<leader>a",
+            function()
+                require("nvim-tree.api").tree.open()
+            end,
+        },
+    },
+    config = function()
+        ---@class nvim_tree.api.decorator.UserDecorator
+        local UserDecorator = require("nvim-tree.api").decorator.UserDecorator
+
+        ---@class GitIgnoreDecorator: nvim_tree.api.decorator.UserDecorator
+        local GitIgnoreDecorator = UserDecorator:extend()
+
+        function GitIgnoreDecorator:new()
+            self.enabled = true
+            self.highlight_range = "name"
+            self.icon_placement = "none"
+            self.file_hl = "NvimTreeGitFileIgnoredHL"
+            self.folder_hl = "NvimTreeGitFolderIgnoredHL"
+        end
+
+        ---@param node Node
+        ---@return string? highlight_group
+        function GitIgnoreDecorator:highlight_group(node)
+            local status = node.git_status
+            if not status then
+                return
+            end
+
+            if status.file == "!!" then
+                return self.file_hl
+            elseif status.dir and status.dir.direct == "!!" then
+                return self.folder_hl
+            end
+        end
+
+        override_highlights()
+
+        local signs = require("ow.lsp").diagnostic_signs
+        require("nvim-tree").setup({
+            on_attach = function(bufnr)
+                local function opts(desc)
+                    return {
+                        desc = "nvim-tree: " .. desc,
+                        buffer = bufnr,
+                        noremap = true,
+                        silent = true,
+                        nowait = true,
+                    }
+                end
+
+                local api = require("nvim-tree.api")
+                api.config.mappings.default_on_attach(bufnr)
+
+                vim.keymap.del("n", "D", { buffer = bufnr })
+                vim.keymap.del("n", "bt", { buffer = bufnr })
+
+                vim.keymap.set("n", "d", api.fs.trash, opts("Trash"))
+                vim.keymap.set(
+                    "n",
+                    "bd",
+                    api.marks.bulk.trash,
+                    opts("Trash Bookmarked")
+                )
+                vim.keymap.set("n", "l", api.node.open.edit, opts("Open"))
+                vim.keymap.set(
+                    "n",
+                    "h",
+                    api.node.navigate.parent_close,
+                    opts("Close Directory")
+                )
+            end,
+            hijack_cursor = true,
+            hijack_netrw = false,
+            view = {
+                width = 40,
+                preserve_window_proportions = true,
+            },
+            renderer = {
+                full_name = true,
+                root_folder_label = ":~",
+                special_files = {},
+                decorators = {
+                    "Git",
+                    GitIgnoreDecorator,
+                    "Open",
+                    "Modified",
+                    "Bookmark",
+                    "Diagnostics",
+                    "Copied",
+                    "Cut",
+                },
+                highlight_modified = "icon",
+                highlight_bookmarks = "name",
+                highlight_clipboard = "all",
+                indent_markers = {
+                    enable = true,
+                },
+                icons = {
+                    git_placement = "right_align",
+                    diagnostics_placement = "signcolumn",
+                    bookmarks_placement = "after",
+                    symlink_arrow = " -> ",
+                    show = {
+                        file = false,
+                        folder = false,
+                        folder_arrow = false,
+                        bookmarks = false,
+                    },
+                    glyphs = {
+                        modified = "*",
+                        git = {
+                            unstaged = "M",
+                            staged = "M",
+                            unmerged = "!",
+                            renamed = "R",
+                            untracked = "?",
+                            deleted = "D",
+                            ignored = " ",
+                        },
+                    },
+                },
+            },
+            update_focused_file = {
+                enable = true,
+            },
+            diagnostics = {
+                enable = true,
+                show_on_dirs = true,
+                icons = {
+                    hint = signs.text[vim.diagnostic.severity.HINT],
+                    info = signs.text[vim.diagnostic.severity.INFO],
+                    warning = signs.text[vim.diagnostic.severity.WARN],
+                    error = signs.text[vim.diagnostic.severity.ERROR],
+                },
+            },
+            modified = {
+                enable = true,
+            },
+            filters = {
+                git_ignored = false,
+                custom = { "^\\.git$" },
+            },
+            live_filter = {
+                prefix = "Filter: ",
+                always_show_folders = false,
+            },
+            filesystem_watchers = {
+                enable = true,
+            },
+            actions = {
+                use_system_clipboard = false,
+                change_dir = {
+                    enable = false,
+                },
+                expand_all = {
+                    exclude = { ".venv", "build" },
+                },
+                open_file = {
+                    window_picker = {
+                        enable = false,
+                    },
+                },
+            },
+            notify = {
+                threshold = vim.log.levels.WARN,
+                absolute_path = false,
+            },
+            help = {
+                sort_by = "desc",
+            },
+        })
+
+        disable_highlights()
+
+        require("nvim-tree.api").tree.toggle({
+            find_file = true,
+            focus = false,
+        })
+    end,
+}