idk what all...

core/diagnostics.lua

@@ -7,3 +7,17 @@ vim.diagnostic.config {
   virtual_lines = false,
   jump = { float = true },
 }
+
+local function open_line_diagnostics()
+  vim.diagnostic.open_float {
+    scope = 'line',
+    focusable = true,
+    border = 'rounded',
+    source = 'always',
+    max_width = math.floor(vim.o.columns * 0.8),
+    max_height = math.floor(vim.o.lines * 0.5),
+  }
+end
+
+vim.api.nvim_create_user_command('Diag', open_line_diagnostics, { desc = 'Show diagnostics for the current line' })
+vim.keymap.set('n', '<leader>d', open_line_diagnostics, { desc = 'Show line [D]iagnostics' })

core/keymaps.lua

@@ -8,7 +8,25 @@ vim.keymap.set('n', '<C-h>', '<C-w><C-h>', { desc = 'Move focus to the left wind
 vim.keymap.set('n', '<C-l>', '<C-w><C-l>', { desc = 'Move focus to the right window' })
 vim.keymap.set('n', '<C-j>', '<C-w><C-j>', { desc = 'Move focus to the lower window' })
 vim.keymap.set('n', '<C-k>', '<C-w><C-k>', { desc = 'Move focus to the upper window' })
-vim.keymap.set('n', '<C-q>', '<cmd>close<CR>', { desc = 'Close window' })
+vim.keymap.set('n', '<C-q>', function()
+  local wins = vim.tbl_filter(function(win)
+    return vim.api.nvim_win_get_config(win).relative == ''
+  end, vim.api.nvim_tabpage_list_wins(0))
+
+  if #wins > 1 then
+    vim.cmd('close')
+  else
+    local buffers = vim.tbl_filter(function(buf)
+      return vim.api.nvim_buf_is_valid(buf) and vim.bo[buf].buflisted
+    end, vim.api.nvim_list_bufs())
+
+    if #buffers > 1 then
+      vim.cmd('bdelete')
+    else
+      vim.cmd('q')
+    end
+  end
+end, { desc = 'Close split, buffer, or exit' })
 vim.keymap.set('n', '<C-\\>', '<cmd>vsplit<CR>', { desc = 'Vertical split' })
 vim.keymap.set('n', '<C-S-\\>', '<cmd>split<CR>', { desc = 'Horizontal split' })
 vim.keymap.set('n', '<leader>po', '<cmd>only<CR>', { desc = 'Only pane' })

core/options.lua

@@ -21,7 +21,7 @@ vim.o.softtabstop = 4
 vim.o.expandtab = true
 
 vim.o.list = true
-vim.opt.listchars = { tab = '» ', trail = '·', nbsp = '␣' }
+vim.opt.listchars = { tab = '  ', trail = '·', nbsp = '␣' }
 
 vim.o.inccommand = 'split'
 vim.o.cursorline = true