diff --git a/AutoMark/scripts/mods/AutoMark/AutoMark.lua b/AutoMark/scripts/mods/AutoMark/AutoMark.lua
index 9a40af1..d2f2f56 100644
--- a/AutoMark/scripts/mods/AutoMark/AutoMark.lua
+++ b/AutoMark/scripts/mods/AutoMark/AutoMark.lua
@@ -330,6 +330,7 @@ mod:io_dofile("AutoMark/scripts/mods/AutoMark/mark/base_mark")
 mod:io_dofile("AutoMark/scripts/mods/AutoMark/mark/companion_mark")
 mod:io_dofile("AutoMark/scripts/mods/AutoMark/mark/focus_target_mark")
 mod:io_dofile("AutoMark/scripts/mods/AutoMark/mark/servo_skull_mark")
+mod:io_dofile("AutoMark/scripts/mods/AutoMark/ui/debug_hud")
 
 --  Mod Enabled
 mod.on_enabled                = function(initial_call)
diff --git a/AutoMark/scripts/mods/AutoMark/AutoMark_data.lua b/AutoMark/scripts/mods/AutoMark/AutoMark_data.lua
index 2d680fc..3d5ce9a 100644
--- a/AutoMark/scripts/mods/AutoMark/AutoMark_data.lua
+++ b/AutoMark/scripts/mods/AutoMark/AutoMark_data.lua
@@ -174,6 +174,11 @@ local widgets = {
                         type          = "checkbox",
                         default_value = false,
                     },
+                    {
+                        setting_id    = "debug_hud",
+                        type          = "checkbox",
+                        default_value = false,
+                    },
                 },
             },
             {
diff --git a/AutoMark/scripts/mods/AutoMark/AutoMark_localization.lua b/AutoMark/scripts/mods/AutoMark/AutoMark_localization.lua
index 3984c5d..f38ed52 100644
--- a/AutoMark/scripts/mods/AutoMark/AutoMark_localization.lua
+++ b/AutoMark/scripts/mods/AutoMark/AutoMark_localization.lua
@@ -67,6 +67,16 @@ local localization = {
         ["zh-cn"] = "在聊天窗口中打印调试消息。关闭可保持游戏界面安静；后台诊断不受影响。",
         ["zh-tw"] = "在聊天視窗中打印除錯訊息。關閉可保持遊戲介面安靜；背景診斷不受影響。",
     },
+    debug_hud = {
+        en = "Debug HUD Overlay",
+        ["zh-cn"] = "调试HUD面板",
+        ["zh-tw"] = "除錯HUD面板",
+    },
+    debug_hud_tooltip = {
+        en = "Shows a live text panel (left side of the screen) with current mark targets, cooldowns, skull/dog state and server accept results. Applied at the next mission start.",
+        ["zh-cn"] = "在屏幕左侧显示实时文本面板：当前标记目标、冷却、骷髅/狗状态及服务器接受结果。下个任务开始时生效。",
+        ["zh-tw"] = "在螢幕左側顯示即時文字面板：目前標記目標、冷卻、骷髏/狗狀態及伺服器接受結果。下個任務開始時生效。",
+    },
     omni_mark = {
         en = "360° Marking",
         ["zh-cn"] = "全向标记",
diff --git a/AutoMark/scripts/mods/AutoMark/mark/servo_skull_mark.lua b/AutoMark/scripts/mods/AutoMark/mark/servo_skull_mark.lua
index 752853a..0871649 100644
--- a/AutoMark/scripts/mods/AutoMark/mark/servo_skull_mark.lua
+++ b/AutoMark/scripts/mods/AutoMark/mark/servo_skull_mark.lua
@@ -449,6 +449,7 @@ function mod:auto_hack(dt, t, fixed_frame)
             local smart_tag_system = context.smart_tag_system
             local tag = smart_tag_system and smart_tag_system:unit_tag(skull_mark_check.unit)
             local accepted = tag and tag._template and tag._template.name == TAG_NAMES.SERVO_SKULL_TAG
+            mod.last_skull_confirm = { n = skull_mark_check.n, accepted = accepted == true }
             mod:diag(string.format("OMNI-CONFIRM skull-mark %s accepted=%s alive=%s state=%s", skull_mark_check.n, tostring(accepted == true), tostring(HEALTH_ALIVE[skull_mark_check.unit] == true), mod:debug_servo_skull_state()))
             skull_mark_check = nil
         end
diff --git a/AutoMark/scripts/mods/AutoMark/targeting/custom_targeting.lua b/AutoMark/scripts/mods/AutoMark/targeting/custom_targeting.lua
index ba7139d..586ee2f 100644
--- a/AutoMark/scripts/mods/AutoMark/targeting/custom_targeting.lua
+++ b/AutoMark/scripts/mods/AutoMark/targeting/custom_targeting.lua
@@ -864,9 +864,12 @@ elseif tag_name == TAG_NAMES.SERVO_SKULL_TAG then
         end
         table.sort(parts)
         mod:diag(string.format("OMNI-DIAG pass[%s] best=%s rejects=[%s]", tostring(tag_name), tostring(best_unit_breed_name), table.concat(parts, ",")))
+        mod.omni_last_rejects = table.concat(parts, ",")
         omni_rejects = nil
     end
 
+    mod.omni_last = { tag_name = tag_name, best = best_unit_breed_name, cands = num_hits }
+
     if best_unit ~= marked_unit then
         return best_unit, best_unit_tag, best_unit_is_dormant_daemonhost
     end
diff --git a/AutoMark/scripts/mods/AutoMark/ui/debug_hud.lua b/AutoMark/scripts/mods/AutoMark/ui/debug_hud.lua
new file mode 100644
index 0000000..25b4dc5
--- /dev/null
+++ b/AutoMark/scripts/mods/AutoMark/ui/debug_hud.lua
@@ -0,0 +1,123 @@
+-- AutoMark debug HUD (mod side): injects the HUD element definition at mission
+-- HUD creation and feeds it a rebuilt status line buffer at 5 Hz.
+local mod = get_mod("AutoMark")
+local mod_settings = mod.settings
+local TAG_NAMES = mod.TAG_NAMES
+local Managers = Managers
+local ScriptUnit_extension = ScriptUnit.extension
+
+mod.debug_hud_last = {}
+
+local ELEMENT_CLASS_NAME = "HudElementAutoMarkDebug"
+
+mod:hook(CLASS.UIManager, "create_player_hud",
+    function(func, self, peer_id, local_player_id, elements, visibility_groups)
+        if mod_settings.debug_hud and elements then
+            local already = false
+            for i = 1, #elements do
+                if elements[i].class_name == ELEMENT_CLASS_NAME then
+                    already = true
+                    break
+                end
+            end
+            if not already then
+                elements[#elements + 1] = {
+                    class_name = ELEMENT_CLASS_NAME,
+                    filename = "AutoMark/scripts/mods/AutoMark/ui/hud_element_debug",
+                    use_hud_scale = true,
+                    visibility_groups = { "alive", "dead" },
+                }
+            end
+        end
+        return func(self, peer_id, local_player_id, elements, visibility_groups)
+    end)
+
+local function unit_breed_name(unit)
+    if not unit then
+        return "-"
+    end
+
+    local ok, name = pcall(function()
+        local unit_data_extension = ScriptUnit_extension(unit, "unit_data_system")
+        local breed = unit_data_extension and unit_data_extension._breed
+        return breed and breed.name or "?"
+    end)
+    return ok and name or "?"
+end
+
+local function tag_line(label, tag_name)
+    local mark_context = mod.mark_context
+    local tag_context = mark_context and mark_context[tag_name]
+    local tag = tag_context and tag_context.tag
+    local target = tag and tag._target_unit
+    local class_settings = mod:get_class_settings(tag_name)
+    return string.format("%-5s | %-22s | cd %4.1f sw %4.1f | %s",
+        label,
+        unit_breed_name(target),
+        tag_context and tag_context.cooldown or 0,
+        tag_context and tag_context.priority_switch_cooldown or 0,
+        class_settings and class_settings.toggle_class and "ON" or "OFF")
+end
+
+function mod:build_debug_hud_lines()
+    local buf = mod.debug_hud_last
+    for i = 1, #buf do
+        buf[i] = nil
+    end
+
+    if not mod_settings.debug_hud or not mod_settings.toggle_mod then
+        return buf
+    end
+
+    local context = mod.context
+    local game_mode_manager = Managers.state.game_mode
+    buf[#buf + 1] = "AUTOMARK  " .. tostring(context.class_name) .. "  " .. (game_mode_manager and tostring(game_mode_manager:game_mode_name()) or "?")
+
+    local has_skull = context.class_name == "cryptic" and context.has_servo_skull
+    local has_dog = context.class_name == "adamant" and context.has_companion
+
+    if has_skull then
+        buf[#buf + 1] = tag_line("SKULL", TAG_NAMES.SERVO_SKULL_TAG)
+        buf[#buf + 1] = "skull state: " .. tostring(mod:debug_servo_skull_state()) .. (mod:is_servo_skull_hacking() and " HACKING" or "")
+    end
+    if has_dog then
+        buf[#buf + 1] = tag_line("DOG", TAG_NAMES.COMPANION_TAG)
+    end
+    buf[#buf + 1] = tag_line("PING", TAG_NAMES.ENEMY_TAG)
+
+    local last = mod.omni_last
+    if last then
+        buf[#buf + 1] = string.format("PICK[%s] best=%s cands=%s", tostring(last.tag_name), tostring(last.best), tostring(last.cands))
+        if mod.omni_last_rejects then
+            buf[#buf + 1] = "  rejects: " .. mod.omni_last_rejects
+        end
+    end
+
+    local confirm = mod.last_skull_confirm
+    if confirm then
+        buf[#buf + 1] = "SERVER last " .. tostring(confirm.n) .. ": " .. (confirm.accepted and "ACCEPTED" or "REJECTED")
+    end
+
+    return buf
+end
+
+local hud_build_timer = 0
+mod:hook_safe(CLASS.PlayerUnitSmartTargetingExtension, "fixed_update",
+    function(self, unit, dt, t, fixed_frame)
+        if not mod_settings.debug_hud or not mod_settings.toggle_mod then
+            return
+        end
+        if self._player.viewport_name ~= "player1" then
+            return
+        end
+
+        hud_build_timer = hud_build_timer - dt
+        if hud_build_timer <= 0 then
+            hud_build_timer = 0.2
+            local ok, err = pcall(mod.build_debug_hud_lines, mod)
+            if not ok and mod_settings.debug_mode and not mod.debug_hud_err_logged then
+                mod.debug_hud_err_logged = true
+                mod:diag("OMNI-HUD builder error:", tostring(err))
+            end
+        end
+    end)
diff --git a/AutoMark/scripts/mods/AutoMark/ui/hud_element_debug.lua b/AutoMark/scripts/mods/AutoMark/ui/hud_element_debug.lua
new file mode 100644
index 0000000..2b7af73
--- /dev/null
+++ b/AutoMark/scripts/mods/AutoMark/ui/hud_element_debug.lua
@@ -0,0 +1,92 @@
+-- AutoMark debug HUD element: plain-text live status panel (fork feature).
+-- Instantiated by the game HUD pipeline (UIHud._add_element requires this file
+-- by definition.filename). Content is produced by AutoMark mod side
+-- (ui/debug_hud.lua -> mod.debug_hud_last) so this file stays dumb.
+local UIWorkspaceSettings = require("scripts/settings/ui/ui_workspace_settings")
+local UIWidget = require("scripts/managers/ui/ui_widget")
+
+require("scripts/foundation/utilities/color")
+
+local mod = get_mod("AutoMark")
+
+local HudElementAutoMarkDebug = class("HudElementAutoMarkDebug", "HudElementBase")
+
+local panel_size = { 860, 800 }
+
+local scenegraph_definition = {
+	screen = UIWorkspaceSettings.screen,
+	panel = {
+		horizontal_alignment = "left",
+		parent = "screen",
+		vertical_alignment = "middle",
+		size = panel_size,
+		position = {
+			25,
+			0,
+			10,
+		},
+	},
+}
+
+local widget_definitions = {
+	automark_debug = UIWidget.create_definition({
+		{
+			pass_type = "text",
+			style_id = "debug_text",
+			value_id = "debug_text",
+			style = {
+				drop_shadow = true,
+				font_size = 19,
+				font_type = "proxima_nova_bold",
+				horizontal_alignment = "left",
+				vertical_alignment = "top",
+				text_horizontal_alignment = "left",
+				text_vertical_alignment = "top",
+				line_spacing = 1.2,
+				size = panel_size,
+				offset = {
+					0,
+					0,
+					0,
+				},
+				text_color = {
+					240,
+					235,
+					180,
+					255,
+				},
+			},
+		},
+	}, "panel"),
+}
+
+HudElementAutoMarkDebug.init = function (self, parent, draw_layer, start_scale)
+	HudElementAutoMarkDebug.super.init(self, parent, draw_layer, start_scale, {
+		scenegraph_definition = scenegraph_definition,
+		widget_definitions = widget_definitions,
+	})
+	self._rebuild_time = 0
+	self._last_text = nil
+end
+
+HudElementAutoMarkDebug.update = function (self, dt, t, ui_renderer, render_settings, input_service)
+	self._rebuild_time = self._rebuild_time - dt
+	if self._rebuild_time > 0 then
+		return
+	end
+	self._rebuild_time = 0.2
+
+	local buf = mod.debug_hud_last
+	local text = table.concat(buf, "\n")
+
+	if text ~= self._last_text then
+		self._last_text = text
+		local widget = self._widgets_by_name.automark_debug
+		if widget then
+			widget.content.debug_text = text
+			widget.dirty = true
+		end
+	end
+end
+
+return HudElementAutoMarkDebug