diff --git a/game/smoke/screen_flow_probe.gd b/game/smoke/screen_flow_probe.gd
new file mode 100644
index 00000000..b633a9c0
--- /dev/null
+++ b/game/smoke/screen_flow_probe.gd
@@ -0,0 +1,186 @@
+# screen_flow_probe.gd — L3 屏壳切换探针（迭代 29 T4）
+# 判的是「跑起来之后，屏与场景的切换对不对」：菜单 ⇄ 营地 ⇄ 冒险 ⇄ 终局 的主流程与回退路径，
+# 每一步断言 **屏级互斥**（同一时刻最多一个屏可见）+ 流程状态位落到正确值。
+# 与 ui_click_probe 的分工：那件走的是「点某个按钮有没有反应」的行为走查（含战斗推进与结算数值面）；
+# 本件只走屏壳与流程状态，不推进战斗、不碰结算数值——屏级互斥是最容易被装配顺序改动悄悄破坏
+# 又最难被单测覆盖的面（全库 change_scene 零命中，屏切换全靠 visible 互斥）。
+# 运行：Godot_console.exe --headless --path . res://smoke/screen_flow_probe.tscn
+extends Node
+
+const ProbeUiUtil := preload("res://smoke/probe_ui_util.gd")
+
+var main: Node
+var _problems: Array[String] = []
+
+
+func _ready() -> void:
+	await get_tree().process_frame
+	main = load("res://presentation/main.tscn").instantiate()
+	add_child(main)
+	await get_tree().process_frame
+	await get_tree().process_frame
+
+	# 隔离存档（全 worktree 共享同一份 user://save.json——探针必须换注，禁碰真实档）
+	ProbeUiUtil.isolate_save(main, "smoke_screen_flow", false, false, false, false)
+	await get_tree().process_frame
+
+	await _step_boot_menu()
+	await _step_menu_to_camp()
+	await _step_camp_back_to_menu()
+	await _step_menu_to_adventure()
+	await _step_level_to_battle_and_back()
+	await _step_abandon_to_end()
+	await _step_end_back_to_menu()
+
+	if _problems.is_empty():
+		print("[screen_flow_probe] PASS — 六步主流程＋回退路径全绿（屏级互斥：任意时刻 ≤1 屏可见）")
+		get_tree().quit(0)
+		return
+	print("[screen_flow_probe] FAIL — %d 处问题：" % _problems.size())
+	for p in _problems:
+		print("[screen_flow_probe]   - " + p)
+	get_tree().quit(1)
+
+
+# ---- 屏级互斥判据 ----
+# 屏标记取法：菜单/营地/终局看各自主内容层的 visible；冒险取流程状态位 run_scope.is_adventure
+#（战斗容器 battle_root 在局外也 visible——裸看 visible 会把 boot 态误判成「菜单与冒险同时在场」）。
+# **合法叠加只有一对**：终局覆盖层盖在冒险内容之上（终局态 is_adventure 尚未收束，是设计如此）。
+# 其余任意两屏同时为真＝互斥失守。
+func _screen_flags() -> Dictionary:
+	return {
+		"菜单": main._start_overlay != null and main._start_overlay.visible,
+		"营地": main.camp_overlay != null and main.camp_overlay.visible,
+		"冒险": main.run_scope != null and main.run_scope.is_adventure,
+		"终局": main._end_overlay != null and main._end_overlay.visible,
+	}
+
+
+func _flags_text(f: Dictionary) -> String:
+	var on: Array[String] = []
+	for k in ["菜单", "营地", "冒险", "终局"]:
+		if bool(f[k]):
+			on.append(k)
+	return "／".join(on) if not on.is_empty() else "无"
+
+
+# ---- 流程状态位（与可见性是两回事，逐步单独判）----
+func _expect_adventure_flag(step: String, expect: bool) -> void:
+	var got: bool = main.run_scope != null and main.run_scope.is_adventure
+	if got != expect:
+		_problems.append("%s：流程状态位 is_adventure 应为 %s，实测 %s" % [step, str(expect), str(got)])
+
+
+func _expect_exclusive(step: String, expect: String) -> void:
+	var f: Dictionary = _screen_flags()
+	var pairs := [["菜单", "营地"], ["菜单", "冒险"], ["营地", "冒险"], ["终局", "营地"], ["终局", "菜单"]]
+	for pair in pairs:
+		var a: String = pair[0]
+		var b: String = pair[1]
+		if bool(f[a]) and bool(f[b]):
+			_problems.append("%s：屏级互斥失守（%s 与 %s 同时在场）" % [step, a, b])
+	if not bool(f[expect]):
+		_problems.append("%s：期望屏「%s」不在场（实测 %s）" % [step, expect, _flags_text(f)])
+		return
+	for k in ["菜单", "营地", "冒险", "终局"]:
+		if k == expect:
+			continue
+		if k == "冒险" and expect == "终局":
+			continue   # 合法叠加：终局覆盖在冒险内容之上
+		if bool(f[k]):
+			_problems.append("%s：屏「%s」不该在场（实测 %s）" % [step, k, _flags_text(f)])
+
+
+func _frames(n: int = 2) -> void:
+	for _i in n:
+		await get_tree().process_frame
+
+
+# ---- ① boot：菜单独占 ----
+func _step_boot_menu() -> void:
+	_expect_exclusive("①boot", "菜单")
+	_expect_adventure_flag("①boot", false)
+	if main.debug_overlay != null and main.debug_overlay.visible:
+		_problems.append("①boot：调试浮窗 boot 自动开（菜单优先失守）")
+
+
+# ---- ② 菜单 → 营地（真实按钮信号路径）----
+func _step_menu_to_camp() -> void:
+	var campbtn: Button = ProbeUiUtil.find_button(main._start_overlay, "营地", "prefix")
+	if campbtn == null:
+		_problems.append("②菜单→营地：营地按钮缺失")
+		return
+	campbtn.pressed.emit()
+	await _frames()
+	_expect_exclusive("②菜单→营地", "营地")
+
+
+# ---- ③ 营地 → 菜单（回退路径：营地关闭发自覆盖层自身信号）----
+func _step_camp_back_to_menu() -> void:
+	if main.camp_overlay == null:
+		_problems.append("③营地→菜单：营地覆盖层句柄缺失")
+		return
+	main.camp_overlay.closed.emit()
+	await _frames()
+	_expect_exclusive("③营地→菜单（回退）", "菜单")
+
+
+# ---- ④ 菜单 → 冒险（开新冒险 → 入口停点落关卡地图屏）----
+func _step_menu_to_adventure() -> void:
+	var lvbtn: Button = ProbeUiUtil.find_button(main._start_overlay, "开始冒险", "contains")
+	if lvbtn == null:
+		lvbtn = ProbeUiUtil.find_button(main._start_overlay, "冒险", "contains")
+	if lvbtn == null:
+		_problems.append("④菜单→冒险：开始冒险按钮缺失")
+		return
+	lvbtn.pressed.emit()
+	await _frames(3)
+	_expect_exclusive("④菜单→冒险", "冒险")
+	_expect_adventure_flag("④菜单→冒险", true)
+	if main.run_scope != null and main.run_scope.adventure == null:
+		_problems.append("④菜单→冒险：冒险实例未建立（入口停点未达）")
+	if main.level_screen != null and not main.level_screen.visible:
+		_problems.append("④菜单→冒险：入口停点未落在关卡地图屏（level_screen 不可见）")
+
+
+# ---- ⑤ 冒险内屏切换：关卡地图屏 ⇄ 战斗屏（屏内两态，屏级仍独占）----
+func _step_level_to_battle_and_back() -> void:
+	if not main.level_screen.visible:
+		_problems.append("⑤冒险内切换：前置不在关卡地图屏")
+		return
+	main._exit_level_screen()
+	await _frames()
+	if main.level_screen.visible:
+		_problems.append("⑤冒险内切换：退出关卡屏后 level_screen 仍可见")
+	if main._battle_root != null and not main._battle_root.visible:
+		_problems.append("⑤冒险内切换：战斗屏未接手（battle_root 不可见）")
+	_expect_exclusive("⑤冒险内切换（关卡→战斗）", "冒险")
+	main._enter_level_screen()
+	await _frames()
+	if not main.level_screen.visible:
+		_problems.append("⑤冒险内切换：回到关卡地图屏失败")
+	_expect_exclusive("⑤冒险内切换（战斗→关卡）", "冒险")
+
+
+# ---- ⑥ 放弃 → 终局（放弃路径＝回退路径的非正常出口）----
+func _step_abandon_to_end() -> void:
+	if main.run_scope == null or main.run_scope.adventure == null:
+		_problems.append("⑥放弃→终局：前置无冒险实例")
+		return
+	main._on_abandon_requested()
+	await _frames(4)
+	_expect_exclusive("⑥放弃→终局", "终局")
+	if main._end_overlay != null and not main._end_overlay.visible:
+		_problems.append("⑥放弃→终局：终局覆盖层未开")
+
+
+# ---- ⑦ 终局 → 菜单（终局出口返回开始界面）----
+func _step_end_back_to_menu() -> void:
+	if main._end_overlay == null or not main._end_overlay.visible:
+		_problems.append("⑦终局→菜单：前置不在终局")
+		return
+	main._end_overlay.continue_pressed.emit()
+	await _frames(3)
+	_expect_exclusive("⑦终局→菜单", "菜单")
+	if main.run_scope != null and main.run_scope.is_adventure:
+		_problems.append("⑦终局→菜单：冒险态未收束（run_scope 仍标 is_adventure）")
diff --git a/game/smoke/screen_flow_probe.tscn b/game/smoke/screen_flow_probe.tscn
new file mode 100644
index 00000000..5d847fb3
--- /dev/null
+++ b/game/smoke/screen_flow_probe.tscn
@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://smoke/screen_flow_probe.gd" id="1"]
+
+[node name="ScreenFlowProbe" type="Node"]
+script = ExtResource("1")
diff --git a/game/tests/run_all.gd b/game/tests/run_all.gd
index 8dd341f8..4c48139e 100644
--- a/game/tests/run_all.gd
+++ b/game/tests/run_all.gd
@@ -93,8 +93,14 @@ func _run_suite(suite: Dictionary, idx: int) -> int:
 	var out := PackedStringArray()
 	var code: int = OS.execute("cmd.exe", PackedStringArray(["/c", cmd]), out, true, false)
 	var text := FileAccess.get_file_as_string(log) if FileAccess.file_exists(log) else ""
-	print(text)
-	if not bool(suite.get("negative", false)) and _has_script_error(text):
+	var negative := bool(suite.get("negative", false))
+	# 负面套件（坏表/违规输入是它的测试目标）全文折叠，只回显结论行——
+	# 它输出里的 Parse Error 是预期产物，回显出去会让编排层的日志扫描误判成真实脚本错误。
+	if negative:
+		print("[run_all] %s：负面套件——全文输出已折叠（输出中的错误为其测试目标，非缺陷）" % path)
+	else:
+		print(text)
+	if not negative and _has_script_error(text):
 		push_error("[run_all] FAIL %s — 输出含脚本错误标记：%s" % [path, _script_error_line(text)])
 		return 1
 	if code != expect:
diff --git a/tools/probe_gate.sh b/tools/probe_gate.sh
index 484904e7..7b69c3b4 100644
--- a/tools/probe_gate.sh
+++ b/tools/probe_gate.sh
@@ -110,6 +110,12 @@ st=$?; kill_orphans
 grep -E "PASS|FAIL" "$TMP/ctp.log" | head -12
 verdict "ui_contrast_probe" "$TMP/ctp.log" "$st" || _rc=1
 
+echo "======== screen_flow_probe（L3 屏壳切换·迭代 29 T4） ========"
+timeout 120 "$G" --headless --path "$GAME_WIN" res://smoke/screen_flow_probe.tscn >"$TMP/sfp.log" 2>&1
+st=$?; kill_orphans
+grep -E "screen_flow_probe" "$TMP/sfp.log" | tail -3
+verdict "screen_flow_probe" "$TMP/sfp.log" "$st" "screen_flow_probe" || _rc=1
+
 if [ "$WITH_CLICK" -eq 1 ]; then
 	echo "======== ui_click_probe 行为走查 ========"
 	timeout 240 "$G" --headless --path "$GAME_WIN" res://smoke/ui_click_probe.tscn >"$TMP/clk.log" 2>&1