Gate laptop/work language packs behind stow-loaded modules

Neovim now loads either laptop-languages.lua or work-languages.lua
depending on which stow packages are active. Work mode suppresses
Rust/Go/C/C++/LaTeX servers, DAP, and vimtex entirely via cond guards.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

laptop/.config/nvim/init.lua

@@ -5,9 +5,14 @@ vim.g.mapleader      = ' '
 vim.g.maplocalleader = '\\'  -- vimtex uses \ll, \lv, etc.
 vim.g.have_nerd_font = true
 
--- Load work-language extras when the work stow package is active
+-- work-languages.lua (work stow) → work mode; laptop-languages.lua → laptop mode.
+-- The two are mutually exclusive: work mode suppresses laptop languages.
 local _work = {}
 pcall(function() _work = require('work-languages') end)
+local _lang = {}
+if not next(_work) then
+  pcall(function() _lang = require('laptop-languages') end)
+end
 
 -------------------------------------------------------------------------------
 -- Options
@@ -262,11 +267,12 @@ require('lazy').setup({
     build = ':TSUpdate',
     main  = 'nvim-treesitter.configs',
     opts  = {
-      ensure_installed = vim.list_extend(
-        { 'bash', 'c', 'cpp', 'go', 'json', 'lua', 'luadoc', 'markdown',
-          'markdown_inline', 'rust', 'vim', 'vimdoc', 'yaml', 'latex' },
-        _work.parsers or {}
-      ),
+      ensure_installed = (function()
+        local t = { 'bash', 'json', 'lua', 'luadoc', 'markdown', 'markdown_inline', 'vim', 'vimdoc', 'yaml' }
+        vim.list_extend(t, _lang.parsers or {})
+        vim.list_extend(t, _work.parsers or {})
+        return t
+      end)(),
       auto_install = true,
       highlight    = { enable = true },
       indent       = { enable = true },
@@ -379,13 +385,11 @@ require('lazy').setup({
       },
     },
     opts = {
-      formatters_by_ft = vim.tbl_extend('force', {
-        lua  = { 'stylua' },
-        go   = { 'goimports', 'gofmt' },
-        rust = { 'rustfmt' },
-        c    = { 'clang_format' },
-        cpp  = { 'clang_format' },
-      }, _work.formatters or {}),
+      formatters_by_ft = vim.tbl_extend('force',
+        { lua = { 'stylua' } },
+        _lang.formatters or {},
+        _work.formatters or {}
+      ),
       format_on_save = { timeout_ms = 500, lsp_fallback = true },
     },
   },
@@ -453,10 +457,8 @@ require('lazy').setup({
         require('cmp_nvim_lsp').default_capabilities()
       )
 
-      local servers = vim.tbl_extend('force', {
-        clangd        = {},
-        gopls         = {},
-        rust_analyzer = {},
+      local servers = vim.tbl_extend('force',
+        {
           lua_ls = {
             settings = {
               Lua = {
@@ -469,10 +471,16 @@ require('lazy').setup({
               },
             },
           },
-      }, _work.servers or {})
+        },
+        _lang.servers or {},
+        _work.servers or {}
+      )
 
       require('mason-tool-installer').setup({
-        ensure_installed = vim.list_extend({ 'stylua', 'clang-format' }, _work.tools or {}),
+        ensure_installed = vim.list_extend(
+          vim.list_extend({ 'stylua' }, _lang.tools or {}),
+          _work.tools or {}
+        ),
       })
 
       require('mason-lspconfig').setup({
@@ -493,6 +501,7 @@ require('lazy').setup({
   --------------------------------------------------------------------------
   {
     'mfussenegger/nvim-dap',
+    cond = function() return not next(_work) end,
     dependencies = {
       {
         'rcarriga/nvim-dap-ui',
@@ -548,9 +557,10 @@ require('lazy').setup({
     },
   },
 
-  -- install codelldb via mason
+  -- install codelldb via mason (laptop only)
   {
     'williamboman/mason.nvim',
+    cond = function() return not next(_work) end,
     opts = function(_, opts)
       opts.ensure_installed = opts.ensure_installed or {}
       vim.list_extend(opts.ensure_installed, { 'codelldb' })
@@ -562,6 +572,7 @@ require('lazy').setup({
   --------------------------------------------------------------------------
   {
     'lervag/vimtex',
+    cond = function() return not next(_work) end,
     lazy = false,
     init = function()
       vim.g.vimtex_view_method     = 'zathura'

laptop/.config/nvim/lua/laptop-languages.lua

@@ -0,0 +1,17 @@
+-- Loaded by init.lua when work-languages.lua is absent (laptop stow only).
+-- Mirrors dev-settings.el: C/C++, Go, Rust, DAP.
+return {
+  servers = {
+    clangd        = {},
+    gopls         = {},
+    rust_analyzer = {},
+  },
+  parsers   = { 'c', 'cpp', 'go', 'latex', 'rust' },
+  formatters = {
+    go   = { 'goimports', 'gofmt' },
+    rust = { 'rustfmt' },
+    c    = { 'clang_format' },
+    cpp  = { 'clang_format' },
+  },
+  tools = { 'clang-format' },
+}