diff --git a/lua/claudecode/diff.lua b/lua/claudecode/diff.lua
index 45296ef..4d59f9d 100644
--- a/lua/claudecode/diff.lua
+++ b/lua/claudecode/diff.lua
@@ -111,6 +111,14 @@ local function is_buffer_dirty(file_path)
   return is_dirty, nil
 end
 
+---Restore window layout by delegating to terminal module
+local function restore_window_layout()
+  local ok, terminal = pcall(require, "claudecode.terminal")
+  if ok and terminal.restore_window_layout then
+    terminal.restore_window_layout()
+  end
+end
+
 ---Setup the diff module
 ---@param user_config table? The configuration passed from init.lua
 function M.setup(user_config)
@@ -369,6 +377,8 @@ function M._resolve_diff_as_saved(tab_name, buffer_id)
   if diff_data.target_window and vim.api.nvim_win_is_valid(diff_data.target_window) then
     vim.api.nvim_set_current_win(diff_data.target_window)
     vim.cmd("diffoff")
+    -- Restore proper window layout after closing diff
+    restore_window_layout()
   end
 
   -- Create MCP-compliant response
@@ -678,6 +688,8 @@ function M._cleanup_diff_state(tab_name, reason)
     vim.api.nvim_win_call(diff_data.target_window, function()
       vim.cmd("diffoff")
     end)
+    -- Restore proper window layout after cleanup
+    restore_window_layout()
   end
 
   -- Remove from active diffs
@@ -1016,6 +1028,8 @@ function M.deny_current_diff()
   if target_window and vim.api.nvim_win_is_valid(target_window) then
     vim.api.nvim_set_current_win(target_window)
     vim.cmd("diffoff")
+    -- Restore proper window layout after rejecting diff
+    restore_window_layout()
   end
 
   M._resolve_diff_as_rejected(tab_name)
diff --git a/lua/claudecode/terminal.lua b/lua/claudecode/terminal.lua
index ada546e..21fc301 100644
--- a/lua/claudecode/terminal.lua
+++ b/lua/claudecode/terminal.lua
@@ -423,4 +423,29 @@ function M._get_managed_terminal_for_test()
   return nil
 end
 
+---Restore window layout after closing diff windows
+-- This ensures that Claude's terminal maintains its configured size ratio
+function M.restore_window_layout()
+  local logger = require("claudecode.logger")
+  local effective_config = build_config({})
+
+  -- Get active terminal buffer number
+  local terminal_bufnr = M.get_active_terminal_bufnr()
+  if not terminal_bufnr then
+    return
+  end
+
+  -- Check if terminal is visible and get its window
+  if is_terminal_visible(terminal_bufnr) then
+    local bufinfo = vim.fn.getbufinfo(terminal_bufnr)
+    if bufinfo and #bufinfo > 0 and #bufinfo[1].windows > 0 then
+      local terminal_win = bufinfo[1].windows[1]
+      local total_width = vim.o.columns
+      local terminal_width = math.floor(total_width * effective_config.split_width_percentage)
+      vim.api.nvim_win_set_width(terminal_win, terminal_width)
+      logger.debug("terminal", "Restored window layout with terminal width:", terminal_width)
+    end
+  end
+end
+
 return M