diff --git a/game/smoke/smoke_all.gd b/game/smoke/smoke_all.gd
index b7a3b0d6..b39a522f 100644
--- a/game/smoke/smoke_all.gd
+++ b/game/smoke/smoke_all.gd
@@ -86,6 +86,7 @@ func _split_tail() -> void:
 	_smoke_hygiene_gates()
 	if autoload_ok:
 		await _smoke_scene_split()   # 协程函数必须 await（无 await=发射后不管，首个 await 后即被 quit 截断）
+		await _smoke_boot_chain()
 		await _smoke_run_lifecycle()
 	else:
 		check(false, "V2/V3 前置：autoload 链未就绪（ConfigDB/SaveManager）")
@@ -237,6 +238,70 @@ func _topmost_visible_layer(main: Node) -> Node:
 	return best
 
 
+# ---- boot 链路时序后置条件（迭代 28 T2——装配修复后启动态六断言；只立行为可判断言，不造假时序）----
+func _smoke_boot_chain() -> void:
+	print("--- 迭代28 T2 boot 链路时序后置条件（V2：六断言）---")
+	var main: Node = load("res://presentation/main.tscn").instantiate()
+	root.add_child(main)
+	await process_frame
+	await process_frame
+	# ① ConfigDB 就绪且表已载
+	var db = main.get_node("/root/ConfigDB")
+	check(db.is_ready and db.hero != null,
+		"V2a ConfigDB 就绪且表已载（is_ready+hero 表在座）〔装配生命批 V2〕")
+	# ② 设置已应用（引擎态=settings_store 现值——真实设置文件照读，一致性判据与文件内容无关）
+	var ss = main.settings_store
+	var master := AudioServer.get_bus_index("Master")
+	check(AudioServer.is_bus_mute(master) == (ss.volume_linear <= 0.001)
+		and is_equal_approx(AudioServer.get_bus_volume_db(master), linear_to_db(maxf(ss.volume_linear, 0.001))),
+		"V2b 设置已应用·音量（Master mute/volume_db=settings_store 现值 linear=%f）〔装配生命批 V2〕" % ss.volume_linear)
+	var ui_kit = load("res://presentation/views/ui_kit.gd")
+	check(ui_kit.motion_scale == (0.5 if ss.reduced_motion else 1.0),
+		"V2b 设置已应用·减动效（UiKit.motion_scale=%s=settings_store.reduced_motion=%s）〔装配生命批 V2〕" % [
+			str(ui_kit.motion_scale), str(ss.reduced_motion)])
+	# ③ 启动态菜单可见
+	check(main._start_overlay.visible,
+		"V2c 启动态 _start_overlay.visible=true（boot 后玩家见菜单）〔装配生命批 V2〕")
+	# ④ 续玩钮可见态==SaveManager 断点在档态
+	var sm = main.get_node("/root/SaveManager")
+	# ④-1 boot 路径：boot 时按钮态==真实档断点态（关系判据——与真实档当时内容无关）
+	var real_bp: bool = sm.has_breakpoint()
+	check(main._resume_btn.visible == real_bp,
+		"V2d 续玩钮 boot 态==断点在档态（visible=%s has_breakpoint=%s）〔装配生命批 V2〕" % [
+			str(main._resume_btn.visible), str(real_bp)])
+	# ④-2 隔离新档双向（attach 原地重置——绝不碰真实档 user://save.json；刷新单口与 boot 路径同源）
+	for p in ["user://smoke_boot_chain.json", "user://smoke_boot_chain.json.tmp"]:
+		if FileAccess.file_exists(p):
+			DirAccess.remove_absolute(p)
+	sm.attach_path("user://smoke_boot_chain.json")
+	main._refresh_resume_button()
+	check(not sm.has_breakpoint() and not main._resume_btn.visible,
+		"V2d 续玩钮·无断点态隐藏（visible=%s has_breakpoint=%s）〔装配生命批 V2〕" % [
+			str(main._resume_btn.visible), str(sm.has_breakpoint())])
+	sm.set_breakpoint({"level_index": 2, "master_seed": 42})
+	main._refresh_resume_button()
+	check(sm.has_breakpoint() and main._resume_btn.visible,
+		"V2d 续玩钮·有断点态可见（visible=%s has_breakpoint=%s）〔装配生命批 V2〕" % [
+			str(main._resume_btn.visible), str(sm.has_breakpoint())])
+	sm.clear_breakpoint()
+	main._refresh_resume_button()
+	check(not main._resume_btn.visible,
+		"V2d 续玩钮·清断点后回隐藏（visible=%s）〔装配生命批 V2〕" % str(main._resume_btn.visible))
+	# ⑤ 闲时会话（_ready 即建、永非 null、在树）
+	check(main.run_scope != null and not main.run_scope.is_adventure and main.run_scope.is_inside_tree(),
+		"V2e run_scope 非空且为闲时会话（is_adventure=false+is_inside_tree）〔装配生命批 V2〕")
+	# ⑥ DS_DEBUG 门控一致性（未设=浮窗隐藏；设了=启动即开——两侧同一判据）
+	var debug_on: bool = OS.get_environment("DS_DEBUG") == "1"
+	check(main.debug_overlay.visible == debug_on,
+		"V2f 调试浮窗态==DS_DEBUG 门控（visible=%s DS_DEBUG=%s）〔装配生命批 V2〕" % [
+			str(main.debug_overlay.visible), str(debug_on)])
+	main.queue_free()
+	await process_frame
+	for p in ["user://smoke_boot_chain.json", "user://smoke_boot_chain.json.tmp"]:
+		if FileAccess.file_exists(p):
+			DirAccess.remove_absolute(p)
+
+
 # ---- 会话物化断言（迭代 27 T1 V3——两连局复位/无脏状态残留；原手工复位清单消亡的行为级证明）----
 func _smoke_run_lifecycle() -> void:
 	print("--- 迭代27 T1 会话物化（V3：两连局复位+脏状态不残留）---")