Add editorconfig, tmux, and NeoVim configs

Managed with GNU Stow. Run 'stow editorconfig tmux nvim' to install.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KYrzpJevCUUqP6pFyJHmB4

11 files changed, 253 insertions, 0 deletions

diff --git a/.stowrc b/.stowrc
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index 0000000..bcfb547
--- /dev/null
+++ b/.stowrc
@@ -0,0 +1 @@
+--target=$HOME
diff --git a/README.md b/README.md
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index 0000000..31c7eb8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,20 @@
+# dotfiles
+
+Configs for editorconfig, tmux, and NeoVim. Managed with GNU Stow.
+
+## Install on a new machine
+
+```sh
+git clone <this-repo> ~/src/dotfiles
+cd ~/src/dotfiles
+stow editorconfig tmux nvim
+```
+
+Stow reads the target (`$HOME`) from `.stowrc`.
+
+NeoVim installs its own plugins and language servers on first start.
+
+## Notes
+
+- The tmux status color `#272c2e` matches a terminal background of
+  `#2E3436`. Adjust it on machines with a different terminal theme.
diff --git a/editorconfig/.editorconfig b/editorconfig/.editorconfig
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index 0000000..233b465
--- /dev/null
+++ b/editorconfig/.editorconfig
@@ -0,0 +1,26 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[Makefile]
+indent_style = tab
+
+[{*.go,go.mod}]
+indent_style = tab
+
+[{*.rb,*.rake,Rakefile,Gemfile,*.gemspec,config.ru}]
+indent_size = 2
+
+[*.{html,css}]
+indent_size = 2
+
+[*.{yml,yaml}]
diff --git a/nvim/.config/nvim/after/syntax/markdown.vim b/nvim/.config/nvim/after/syntax/markdown.vim
new file mode 100644
index 0000000..d9b0a80
--- /dev/null
+++ b/nvim/.config/nvim/after/syntax/markdown.vim
@@ -0,0 +1 @@
+syn clear markdownError
diff --git a/nvim/.config/nvim/init.lua b/nvim/.config/nvim/init.lua
new file mode 100644
index 0000000..f621504
--- /dev/null
+++ b/nvim/.config/nvim/init.lua
@@ -0,0 +1,102 @@
+-- Basic options
+vim.g.mapleader = " "
+vim.g.maplocalleader = "\\"
+
+vim.opt.number = true
+vim.opt.relativenumber = false
+vim.opt.mouse = "a"
+vim.opt.ignorecase = true
+vim.opt.smartcase = true
+vim.opt.expandtab = true
+vim.opt.softtabstop = 4
+vim.opt.shiftwidth = 4
+vim.opt.tabstop = 4
+vim.opt.autoindent = true
+vim.opt.cindent = true
+vim.opt.signcolumn = "yes"
+vim.opt.termguicolors = true
+vim.opt.splitright = true
+vim.opt.splitbelow = true
+vim.opt.clipboard = "unnamedplus"
+vim.opt.undofile = true
+vim.opt.cursorline = true
+vim.opt.background="dark"
+vim.opt.completeopt = { "menuone", "noinsert", "popup" }
+
+vim.cmd.colorscheme("habamax")
+
+-- Diagnostics: show messages as virtual text, no fancy UI
+vim.diagnostic.config({
+  virtual_text = true,
+  severity_sort = true,
+})
+
+-- Native LSP completion (NeoVim 0.11+), no completion plugin needed
+vim.api.nvim_create_autocmd("LspAttach", {
+  callback = function(ev)
+    local client = vim.lsp.get_client_by_id(ev.data.client_id)
+    if client and client:supports_method("textDocument/completion") then
+      vim.lsp.completion.enable(true, client.id, ev.buf, { autotrigger = true })
+    end
+  end,
+})
+
+vim.keymap.set("n", "gd", vim.lsp.buf.definition, { desc = "Go to definition" })
+
+-- Go convention: organize imports and format on save (via gopls)
+vim.api.nvim_create_autocmd("BufWritePre", {
+  pattern = "*.go",
+  callback = function()
+    local client = vim.lsp.get_clients({ bufnr = 0, name = "gopls" })[1]
+    if not client then
+      return
+    end
+    local params = vim.lsp.util.make_range_params(0, client.offset_encoding)
+    params.context = { only = { "source.organizeImports" } }
+    local result = vim.lsp.buf_request_sync(0, "textDocument/codeAction", params, 2000)
+    for _, res in pairs(result or {}) do
+      for _, action in pairs(res.result or {}) do
+        if action.edit then
+          vim.lsp.util.apply_workspace_edit(action.edit, client.offset_encoding)
+        end
+      end
+    end
+    vim.lsp.buf.format()
+  end,
+})
+
+-- Spell checking for markdown and git commit messages
+vim.api.nvim_create_autocmd("FileType", {
+  pattern = { "markdown", "gitcommit" },
+  callback = function()
+    vim.opt_local.spell = true
+    vim.opt_local.spelllang = "en_us"
+  end,
+})
+
+
+-- Bootstrap lazy.nvim
+local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
+if not (vim.uv or vim.loop).fs_stat(lazypath) then
+  local lazyrepo = "https://github.com/folke/lazy.nvim.git"
+  local out = vim.fn.system({ "git", "clone", "--filter=blob:none", "--branch=stable", lazyrepo, lazypath })
+  if vim.v.shell_error ~= 0 then
+    vim.api.nvim_echo({
+      { "Failed to clone lazy.nvim:\n", "ErrorMsg" },
+      { out, "WarningMsg" },
+      { "\nPress any key to exit..." },
+    }, true, {})
+    vim.fn.getchar()
+    os.exit(1)
+  end
+end
+vim.opt.rtp:prepend(lazypath)
+
+-- Setup lazy.nvim (loads all files in lua/plugins/)
+require("lazy").setup({
+  spec = {
+    { import = "plugins" },
+  },
+  install = { colorscheme = { "habamax" } },
+  checker = { enabled = true, notify = false },
+})
diff --git a/nvim/.config/nvim/lazy-lock.json b/nvim/.config/nvim/lazy-lock.json
new file mode 100644
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+++ b/nvim/.config/nvim/lazy-lock.json
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+{
+  "lazy.nvim": { "branch": "main", "commit": "306a05526ada86a7b30af95c5cc81ffba93fef97" },
+  "mason-lspconfig.nvim": { "branch": "main", "commit": "67029ccdac1ef8941e13b826417bc0ffac24cc86" },
+  "mason.nvim": { "branch": "main", "commit": "2a6940af80375532e5e9e7c1f2fc6319a1b7a69d" },
+  "neo-tree.nvim": { "branch": "v3.x", "commit": "ebd66767191714e008ce73b769518a763ff31bdc" },
+  "nui.nvim": { "branch": "main", "commit": "de740991c12411b663994b2860f1a4fd0937c130" },
+  "nvim-lspconfig": { "branch": "master", "commit": "1c0d8f70dbc8827263eedc3cf7021ceba0f68689" },
+  "nvim-treesitter": { "branch": "master", "commit": "cf12346a3414fa1b06af75c79faebe7f76df080a" },
+  "nvim-web-devicons": { "branch": "master", "commit": "2ae6958df7ced50baac5035cec0c15799eedfbf7" },
+  "plenary.nvim": { "branch": "master", "commit": "74b06c6c75e4eeb3108ec01852001636d85a932b" },
+  "telescope.nvim": { "branch": "master", "commit": "427b576c16792edad01a92b89721d923c19ad60f" }
+}
diff --git a/nvim/.config/nvim/lua/plugins/lsp.lua b/nvim/.config/nvim/lua/plugins/lsp.lua
new file mode 100644
index 0000000..15933fa
--- /dev/null
+++ b/nvim/.config/nvim/lua/plugins/lsp.lua
@@ -0,0 +1,18 @@
+return {
+  {
+    "mason-org/mason.nvim",
+    opts = {},
+  },
+  {
+    -- Installs language servers and enables them automatically.
+    -- Add "clangd" to ensure_installed for C/C++ later.
+    "mason-org/mason-lspconfig.nvim",
+    dependencies = {
+      "mason-org/mason.nvim",
+      "neovim/nvim-lspconfig",
+    },
+    opts = {
+      ensure_installed = { "gopls", "pyright" },
+    },
+  },
+}
diff --git a/nvim/.config/nvim/lua/plugins/neo-tree.lua b/nvim/.config/nvim/lua/plugins/neo-tree.lua
new file mode 100644
index 0000000..eba00dd
--- /dev/null
+++ b/nvim/.config/nvim/lua/plugins/neo-tree.lua
@@ -0,0 +1,23 @@
+return {
+  "nvim-neo-tree/neo-tree.nvim",
+  branch = "v3.x",
+  dependencies = {
+    "nvim-lua/plenary.nvim",
+    "MunifTanjim/nui.nvim",
+    "nvim-tree/nvim-web-devicons",
+  },
+  lazy = false,
+  keys = {
+    { "<leader>e", "<Cmd>Neotree toggle float<CR>", desc = "Toggle Neo-tree" },
+  },
+  opts = {
+    close_if_last_window = true,
+    filesystem = {
+      follow_current_file = { enabled = true },
+      use_libuv_file_watcher = true,
+    },
+    window = {
+      position = "float",
+    },
+  },
+}
diff --git a/nvim/.config/nvim/lua/plugins/telescope.lua b/nvim/.config/nvim/lua/plugins/telescope.lua
new file mode 100644
index 0000000..76f77c2
--- /dev/null
+++ b/nvim/.config/nvim/lua/plugins/telescope.lua
@@ -0,0 +1,9 @@
+return {
+  "nvim-telescope/telescope.nvim",
+  dependencies = { "nvim-lua/plenary.nvim" },
+  keys = {
+    { "<leader>ff", "<cmd>Telescope find_files<cr>", desc = "Find files" },
+    { "<leader>fg", "<cmd>Telescope live_grep<cr>", desc = "Search in files" },
+    { "<leader>fb", "<cmd>Telescope buffers<cr>", desc = "Open buffers" },
+  },
+}
diff --git a/nvim/.config/nvim/lua/plugins/treesitter.lua b/nvim/.config/nvim/lua/plugins/treesitter.lua
new file mode 100644
index 0000000..9692f57
--- /dev/null
+++ b/nvim/.config/nvim/lua/plugins/treesitter.lua
@@ -0,0 +1,16 @@
+return {
+  "nvim-treesitter/nvim-treesitter",
+  branch = "master",
+  build = ":TSUpdate",
+  config = function()
+    require("nvim-treesitter.configs").setup({
+      ensure_installed = {
+        "python", "go", "gomod", "gosum",
+        "lua", "vim", "vimdoc",
+        "markdown", "markdown_inline", "yaml",
+      },
+      highlight = { enable = true },
+      indent = { enable = true },
+    })
+  end,
+}
diff --git a/tmux/.config/tmux/tmux.conf b/tmux/.config/tmux/tmux.conf
new file mode 100644
index 0000000..c5e339c
--- /dev/null
+++ b/tmux/.config/tmux/tmux.conf
@@ -0,0 +1,25 @@
+# True color and fast Esc for NeoVim
+set -g default-terminal "tmux-256color"
+set -as terminal-features ",*:RGB"
+set -sg escape-time 10
+set -g focus-events on
+
+set-option -g prefix M-m
+unbind-key C-b
+bind-key M-m send-prefix
+
+set -g base-index 1
+set -g pane-base-index 1
+
+# Alt+1..5: switch to window without prefix
+bind -n M-1 select-window -t 1
+bind -n M-2 select-window -t 2
+bind -n M-3 select-window -t 3
+bind -n M-4 select-window -t 4
+bind -n M-5 select-window -t 5
+
+set -g status-left ""
+set -g status-right ""
+# Pseudo shadow: one step darker than the terminal background (#2E3436)
+set -g status-style bg=#272c2e,fg=colour244
+set -g window-status-current-style fg=colour250,bold