feat(ui): add <C-w>o to close all non-opencode windows

Implements an opencode-aware "only" window command, mapped to <C-w>o,
that closes all windows except the opencode output and input windows.
If the input window is hidden, it will be shown after closing other
windows. Updates autocmds to handle live window ID lookups and avoid
tearing down UI when only input/footer is closed. Keymap added to
config for both normal and insert modes.

Author: jugarpeupv

lua/opencode/api.lua

@@ -27,6 +27,37 @@ function M.toggle_input()
   input_window.toggle()
 end
 
+---Close all windows except the opencode output and input windows (like <C-w>o but opencode-aware).
+---If input is hidden it will be shown after closing other windows.
+function M.only_opencode()
+  local windows = state.windows
+  if not windows or not windows.output_win then
+    return
+  end
+
+  -- Collect all windows in the current tabpage that are NOT opencode windows
+  local tabpage = vim.api.nvim_get_current_tabpage()
+  local all_wins = vim.api.nvim_tabpage_list_wins(tabpage)
+  for _, win in ipairs(all_wins) do
+    if win ~= windows.output_win
+      and win ~= windows.input_win
+      and win ~= windows.footer_win
+      and vim.api.nvim_win_is_valid(win)
+    then
+      local cfg = vim.api.nvim_win_get_config(win)
+      -- Skip floating windows that don't belong to opencode
+      if cfg.relative == '' then
+        pcall(vim.api.nvim_win_close, win, false)
+      end
+    end
+  end
+
+  -- If input was hidden, show it
+  if input_window.is_hidden() then
+    input_window._show()
+  end
+end
+
 function M.open_input()
   return core.open({ new_session = false, focus = 'input', start_insert = true })
 end
@@ -1109,6 +1140,13 @@ M.commands = {
     end,
   },
 
+  only_opencode = {
+    desc = 'Close all non-opencode windows (keep output + input)',
+    fn = function()
+      M.only_opencode()
+    end,
+  },
+
   hide = {
     desc = 'Hide opencode windows (preserve buffers for fast restore)',
     fn = function(args)

lua/opencode/config.lua

@@ -67,6 +67,7 @@ M.defaults = {
       ['gr']    =       { 'references',                                        desc = 'Browse code references' },
       ['<M-i>'] =       { 'toggle_input',                 mode = { 'n' },      desc = 'Toggle input window' },
       ['<M-r>'] =       { 'cycle_variant',                mode = { 'n' },      desc = 'Cycle model variants' },
+      ['<C-w>o'] =      { 'only_opencode',                mode = { 'n' },      desc = 'Close all non-opencode windows' },
       ['<leader>oS'] =  { 'select_child_session',                              desc = 'Select child session' },
       ['<leader>oD'] =  { 'debug_message',                                     desc = 'Open raw message debug view' },
       ['<leader>oO'] =  { 'debug_output',                                      desc = 'Open raw output debug view' },
@@ -88,6 +89,7 @@ M.defaults = {
       ['<M-m>']  =      { 'switch_mode',                  mode = { 'n', 'i' }, desc = 'Switch agent mode' },
       ['<M-r>']  =      { 'cycle_variant',                mode = { 'n', 'i' }, desc = 'Cycle model variants' },
       ['<M-i>']  =      { 'toggle_input',                 mode = { 'n', 'i' }, desc = 'Toggle input window' },
+      ['<C-w>o'] =      { 'only_opencode',                mode = { 'n' },      desc = 'Close all non-opencode windows' },
       ['gr']     =      { 'references',                                        desc = 'Browse code references' },
       ['<leader>oS'] =  { 'select_child_session',                              desc = 'Select child session' },
       ['<leader>oD'] =  { 'debug_message',                                     desc = 'Open raw message debug view' },

lua/opencode/ui/autocmds.lua

@@ -7,23 +7,37 @@ function M.setup_autocmds(windows)
   input_window.setup_autocmds(windows, group)
   output_window.setup_autocmds(windows, group)
 
-  -- Only keep shared autocmds here (e.g., WinClosed, WinLeave for all windows)
-  local wins = { windows.input_win, windows.output_win, windows.footer_win }
+  -- Use a global WinClosed handler that does live lookups to handle
+  -- the case where input_win is recreated (new ID) after a hide/show cycle.
   vim.api.nvim_create_autocmd('WinClosed', {
     group = group,
-    pattern = table.concat(wins, ','),
+    pattern = '*',
     callback = function(opts)
       -- Don't close everything if we're just toggling the input window
       if input_window._toggling then
         return
       end
 
       local closed_win = tonumber(opts.match)
-      if vim.tbl_contains(wins, closed_win) then
-        vim.schedule(function()
-          require('opencode.ui.ui').teardown_visible_windows(windows)
-        end)
+
+      -- Live lookup: get the current opencode window IDs at the time of the event
+      local is_output_win = closed_win == windows.output_win
+      local is_input_win = windows.input_win ~= nil and closed_win == windows.input_win
+      local is_footer_win = windows.footer_win ~= nil and closed_win == windows.footer_win
+
+      if not is_output_win and not is_input_win and not is_footer_win then
+        return
       end
+
+      -- If a non-output opencode window was closed (e.g. input/footer via <C-w>o),
+      -- and the output window is still valid, don't tear down the whole UI.
+      if not is_output_win and windows.output_win and vim.api.nvim_win_is_valid(windows.output_win) then
+        return
+      end
+
+      vim.schedule(function()
+        require('opencode.ui.ui').teardown_visible_windows(windows)
+      end)
     end,
   })