diff --git a/Makefile b/Makefile
index 76009c4..6a9a092 100644
--- a/Makefile
+++ b/Makefile
@@ -63,6 +63,8 @@ test-s2:
 	$(GODOT) --headless --path . --script res://tests/s2/test_economy_service.gd
 	$(GODOT) --headless --path . --script res://tests/s2/test_ledger_backed_resources.gd
 	$(GODOT) --headless --path . --script res://tests/s2/test_mana_network_service.gd
+	$(GODOT) --headless --path . --script res://tests/s2/test_mana_reserve_cycle.gd
+	$(GODOT) --headless --path . --script res://tests/s2/test_runtime_mana_reserve.gd
 	$(GODOT) --headless --path . --script res://tests/s2/test_runtime_operations_cycle.gd
 
 test-s3:
diff --git a/autoload/simulation_runtime.gd b/autoload/simulation_runtime.gd
index 64e1d61..6076a80 100644
--- a/autoload/simulation_runtime.gd
+++ b/autoload/simulation_runtime.gd
@@ -29,6 +29,7 @@ const AutoPurchasePlansType := preload("res://scripts/supply/supply_auto_purchas
 const CLEANING_RUNTIME_SNAPSHOT_VERSION := 12
 const WEATHER_RUNTIME_SNAPSHOT_VERSION := 11
 const FacilityCleanliness = preload("res://scripts/environment/facility_cleanliness_service.gd")
+const ManaReserveCycle = preload("res://scripts/mana/mana_reserve_cycle.gd")
 const CleaningBridge = preload("res://scripts/environment/facility_cleaning_bridge.gd")
 const CleaningPolicy = preload("res://scripts/environment/facility_cleaning_policy.gd")
 const UPKEEP_RUNTIME_SNAPSHOT_VERSION := 10
@@ -108,6 +109,7 @@ var facility_cleanliness := FacilityCleanliness.new()
 var cleaning_policy := CleaningPolicy.new()
 var cleaning_bridge := CleaningBridge.new()
 var facility_upkeep := FacilityUpkeepAccrual.new()
+var mana_reserve := ManaReserveCycle.new()
 var upkeep_settlement := FacilityUpkeepSettlement.new()
 var economy_service: EconomyService
 var construction_resource_state: LedgerBackedResourceState
@@ -539,6 +541,7 @@ func create_snapshot() -> Dictionary:
 			&"path": path_service.create_snapshot(),
 			&"movement_credits": _serialize_movement_credits(),
 			&"mana": mana_network_service.create_snapshot(),
+			&"mana_reserve": mana_reserve.create_snapshot(),
 			&"economy": economy_service.create_snapshot(),
 			&"facility_upkeep": facility_upkeep.create_snapshot(),
 			&"upkeep_settlement": upkeep_settlement.create_snapshot(),
@@ -676,6 +679,8 @@ func _restore_snapshot_internal(snapshot: Dictionary, recovery_mode: bool) -> bo
 			runtime_current_keys.append(&"auto_purchase_plans")
 		if runtime_data.has(&"special_peeping_rooms"):
 			runtime_current_keys.append(&"special_peeping_rooms")
+		if runtime_data.has(&"mana_reserve"):
+			runtime_current_keys.append(&"mana_reserve")
 		if not _dictionary_has_exact_canonical_keys(runtime_data, runtime_current_keys) \
 				or typeof(runtime_data.get(&"runtime_schema_version", null)) != TYPE_INT \
 				or typeof(runtime_data.get(&"world_seed", null)) != TYPE_INT \
@@ -857,6 +862,23 @@ func _restore_snapshot_internal(snapshot: Dictionary, recovery_mode: bool) -> bo
 	var restored_mana := ManaNetworkService.new()
 	if not restored_mana.restore_snapshot(runtime_data[&"mana"]):
 		return false
+	# A06: saves without the finite reserve keep an explicit stored amount
+	# (0 stays stopped) only within capacity; nothing is silently truncated.
+	var restored_mana_reserve := ManaReserveCycle.new()
+	var saved_game_resources: Variant = snapshot[&"game_state"].get(&"resources", null)
+	if not saved_game_resources is Dictionary \
+			or not ManaReserveCycle.amount_is_valid(saved_game_resources.get(&"mana", saved_game_resources.get("mana", null))):
+		return false
+	if runtime_data.has(&"mana_reserve"):
+		if not restored_mana_reserve.restore_snapshot(runtime_data[&"mana_reserve"]) \
+				or restored_mana_reserve.get_minute() > restored_minute:
+			return false
+		var last_reserve_flow := restored_mana_reserve.get_last_flow()
+		if not last_reserve_flow.is_empty() \
+				and int(saved_game_resources.get(&"mana", saved_game_resources.get("mana", 0))) > int(last_reserve_flow[&"after"]):
+			return false
+	elif not restored_mana_reserve.start_at(restored_minute):
+		return false
 	var restored_economy := EconomyService.new()
 	if not restored_economy.restore_snapshot(runtime_data[&"economy"]):
 		return false
@@ -1325,6 +1347,7 @@ func _restore_snapshot_internal(snapshot: Dictionary, recovery_mode: bool) -> bo
 	_movement_credits = (restored_movement_credits as Dictionary).duplicate(true)
 	_connect_path_performance_signal()
 	mana_network_service = restored_mana
+	mana_reserve = restored_mana_reserve
 	weather = restored_weather
 	facility_cleanliness = restored_cleanliness
 	facility_upkeep = restored_upkeep
@@ -2054,6 +2077,7 @@ func _build_operations_external_state() -> Dictionary:
 		&"personal_action_points": _personal_action_points,
 		# The remaining aggregates are reachable through Event actions or signals.
 		&"mana": mana_network_service.create_snapshot(),
+		&"mana_reserve": mana_reserve.create_snapshot(),
 		&"logistics_dispatcher": logistics_dispatcher.create_snapshot(),
 		&"logistics_requests": _serialize_logistics_requests(),
 		&"defense": defense_service.create_snapshot(),
@@ -2091,7 +2115,7 @@ func _restore_operations_external_state(token: Variant) -> bool:
 		&"excavation", &"spatial_subslots", &"route_projection",
 		&"facility_infrastructure",
 		&"movement_credits", &"domain_events", &"id_generator", &"rng_streams",
-		&"progression", &"hired_staff_candidate_ids", &"mana",
+		&"progression", &"hired_staff_candidate_ids", &"mana", &"mana_reserve",
 		&"logistics_dispatcher", &"defense", &"construction",
 	]
 	for key: StringName in required_dictionary_keys:
@@ -2152,6 +2176,7 @@ func _restore_operations_external_state(token: Variant) -> bool:
 	var ids_ok := id_generator.restore_snapshot(saved[&"id_generator"])
 	var progression_ok := progression_service.restore_snapshot(saved[&"progression"])
 	var mana_ok := mana_network_service.restore_snapshot(saved[&"mana"])
+	mana_ok = mana_reserve.restore_snapshot(saved[&"mana_reserve"]) and mana_ok
 	var dispatcher_ok := logistics_dispatcher.restore_snapshot(saved[&"logistics_dispatcher"])
 	var defense_ok := defense_service.restore_snapshot(saved[&"defense"])
 	var construction_ok := construction_service.restore_snapshot(saved[&"construction"])
@@ -2258,6 +2283,7 @@ func _operations_external_state_matches(saved: Dictionary) -> bool:
 			or not _strict_variants_equal(id_generator.create_snapshot(), saved[&"id_generator"]) \
 			or not _strict_variants_equal(progression_service.create_snapshot(), saved[&"progression"]) \
 			or not _strict_variants_equal(mana_network_service.create_snapshot(), saved[&"mana"]) \
+			or not _strict_variants_equal(mana_reserve.create_snapshot(), saved[&"mana_reserve"]) \
 			or not _strict_variants_equal(logistics_dispatcher.create_snapshot(), saved[&"logistics_dispatcher"]) \
 			or not _strict_variants_equal(_serialize_logistics_requests(), saved[&"logistics_requests"]) \
 			or not _strict_variants_equal(defense_service.create_snapshot(), saved[&"defense"]) \
@@ -5226,6 +5252,8 @@ func _initialize_economy() -> void:
 	upkeep_settlement = FacilityUpkeepSettlement.new()
 	FacilityUpkeepSettlement.prepare_accounts(economy_service)
 	facility_upkeep.start_at(_clock.absolute_minute)
+	mana_reserve = ManaReserveCycle.new()
+	mana_reserve.start_at(_clock.absolute_minute)
 	construction_resource_state = _create_resource_adapter(
 		economy_service,
 		CONSTRUCTION_EXPENSE_ACCOUNT,
@@ -10729,6 +10757,21 @@ func _advance_mana(absolute_minute: int) -> void:
 			infrastructure_preflight.get(&"details", {})
 		)
 		return
+	# A06: generation and upkeep demand settle before local distribution and the
+	# whole-tower gate, so the network and projection see the committed reserve.
+	var reserve_flow := mana_reserve.advance_to(
+		absolute_minute, int(_state.get_resource(&"mana")), mana_network_service.get_total_consumer_demand()
+	)
+	if not bool(reserve_flow.get(&"ok", false)):
+		_latch_infrastructure_failure(
+			StringName(reserve_flow.get(&"code", &"MANA_RESERVE_FAILED")),
+			absolute_minute,
+			"The finite Mana reserve could not settle this boundary.",
+			{&"mana": int(_state.get_resource(&"mana"))}
+		)
+		return
+	if bool(reserve_flow.get(&"processed", false)):
+		_state.set_resource(&"mana", int(reserve_flow[&"after"]))
 	var report := mana_network_service.advance_one_minute(absolute_minute)
 	# Finite reserve is an additional gate, even between network evaluations and
 	# for zero-demand facilities. The network remains the local supply authority.
diff --git a/docs/plans/original-completion-2026-10-02/decisions.json b/docs/plans/original-completion-2026-10-02/decisions.json
index 36fef7c..2b60de0 100644
--- a/docs/plans/original-completion-2026-10-02/decisions.json
+++ b/docs/plans/original-completion-2026-10-02/decisions.json
@@ -33,6 +33,14 @@
       "decision": "2×1・裏層。建築350G、資材4、工期60分、清掃員最低1人／上限2人、顧客0人・利用料なし、維持費2G／日。清潔0〜100・初期100、75以下で予約、現地8分で25回復。定義済み汚れ量を使い未定義値を補完しない。",
       "origin": "user_reply",
       "reference": "../original-completion-2026-09-29/execution/CLEANING_APPROVED_FOUNDATION.md"
+    },
+    {
+      "id": "A06",
+      "title": "マナ有限残量契約（MP-01-r02推薦案）",
+      "decision": "初期100・容量300・世界樹生成20／ゲーム内10分。10分境界ごとにB+G+F−Dを計算し、需要を先に支払い、超過は明示破棄、0で全館停止。需要は登録済み全consumerのmaintenance_mana合計（閉店・停止中も計上）。炉の投入は自然生成と需要支払後のbase_after=min(C,max(0,B+G−D))で空き100以上のとき受理。現Runtimeのphase順序を保持しMANA内で処理。旧セーブの残量は0〜300のみ保持し、超過・不正値は拒否。炉の人物適格性・収率の実接続は別承認。",
+      "origin": "user_reply_in_conversation",
+      "approved_at_jst": "2026-10-19",
+      "reference": "execution/mana-proposal/PROPOSAL.md"
     }
   ],
   "pending": [
diff --git a/docs/plans/original-completion-2026-10-02/execution/p06-01-a06/IMPLEMENTATION.md b/docs/plans/original-completion-2026-10-02/execution/p06-01-a06/IMPLEMENTATION.md
new file mode 100644
index 0000000..36147c8
--- /dev/null
+++ b/docs/plans/original-completion-2026-10-02/execution/p06-01-a06/IMPLEMENTATION.md
@@ -0,0 +1,20 @@
+# P06-01：A06 マナ有限残量契約の実装（2026-10-19）
+
+ユーザーが MP-01-r02 推薦案を採用しました（decisions.json A06）。内容は初期100、容量300、世界樹の生成20/ゲーム内10分です。炉は、自然生成と需要の支払いを済ませた後に判定します。
+
+## 製品への反映
+
+- `scripts/mana/mana_reserve_cycle.gd`：承認値と境界処理です。10分境界ごとに `available=B+G+F`、`consumed=min(available,D)`、`after=min(C,available−consumed)` を計算します。容量を超えた分は overflow として記録し、破棄します。同じ境界は二度処理しません。境界を飛ばした場合は、各境界を順番に処理します。保存データは検証が通ってから反映し、不正なら何も変えません。炉の受理判定は `furnace_offer_accepted`（base_after 後の空きが100以上）です。
+- `scripts/mana/mana_network_service.gd`：`get_total_consumer_demand()` を追加しました。登録済みの全 consumer の需要を合計します。無効化・停止中の consumer も含みます。
+- `autoload/simulation_runtime.gd`：MANA phase の最初で残量を確定してから、局所配電と全館ゲートを評価します。phase の順序は変えていません。新しいセーブは `mana_reserve` を持ちます。Operations の巻き戻し対象にも含めました。
+- 旧セーブの移行：`mana_reserve` が無いセーブは、残量が0〜300の整数であれば、その値を保持して開始します。明示的な0は停止のまま保持します。300超・負値・非整数は拒否し、現在の状態を保持します。
+
+## 試験
+
+- 新規：`tests/s2/test_mana_reserve_cycle.gd`（提案書の比較表の推薦列の値、炉判定の3例、改ざん拒否）、`tests/s2/test_runtime_mana_reserve.gd`（Runtimeでの境界処理、保存往復、旧0の移行、容量超過の拒否、枯渇と復帰）。
+- 既存の停電試験は「マナを0にすれば停電が続く」前提でした。A06では世界樹が次の境界で復帰させるため、停電を継続させる試験だけ `tests/helpers/mana_outage.gd` に置き換えました。これは配電を受けない無効 consumer で需要を足す方法です。
+
+## 未了
+
+- 炉の人物適格性・収率の実接続、未定義13施設の需要、D05 の詳細は別承認です。
+- 全館の実プレイ、性能、Windows での受入は未実施です。原88の正式完了数は変わりません。
diff --git a/docs/plans/original-completion-2026-10-02/plan_validation.json b/docs/plans/original-completion-2026-10-02/plan_validation.json
index ba8525a..0af5038 100644
--- a/docs/plans/original-completion-2026-10-02/plan_validation.json
+++ b/docs/plans/original-completion-2026-10-02/plan_validation.json
@@ -84,7 +84,7 @@
       "passed": true
     },
     {
-      "name": "all5_confirmed_decisions",
+      "name": "all6_confirmed_decisions",
       "passed": true
     },
     {
@@ -238,7 +238,7 @@
     "build_atomic_requirements.py": "6d6ea9e4216372dbd0f9fed3f885a4481b21a3f539a26f64cf98a6830af984c5",
     "build_facility_value_contracts.py": "35027b23ce75ce9e4e0cdfc5132fd2eb771ba9f598d97750d7ecf9ecb257f769",
     "current_evidence_links.json": "db1837bcc8497201134297e312f4b266a297102285307ec3075d4e23632e26c2",
-    "decisions.json": "ad0673051b0fa601e525f05128e0b11e2dddd9d4bae6a3e0170bbf47da35efe9",
+    "decisions.json": "927065d9f840e68667d10998d26eb5d04f5591d9f24082106d082e51d5af5c96",
     "facility_value_contracts.json": "447388ba03a29bfac25f2bcd068665aedbb07ba7641ce86f2db93d44f4c9f326",
     "facility_value_contracts_validation.json": "bf490a9ca585c48fc318e76c4a069ef244827d828d46e6415399f7710590dd16",
     "performance_audit.json": "0b630b15a392c3e0366f1362bfe4ddacb968f915f54549f82e4d6fa315384762",
@@ -251,7 +251,7 @@
     "source_atomic_coverage.json": "2ab7b9e6a2536ef248d4f7ccd695bf75a082b47018aca7a5a1b6b706fe1907bc",
     "validate_atomic_requirements.py": "5b2d0b7d72cb124830fbb0a12d1434e6db698148cc5263d33fd5bd7c2953a1e0",
     "validate_facility_value_contracts.py": "91640e2a76cd6cc9186f7b85c0bf379b24b6cac0d48962815235ee628e7ae43e",
-    "validate_plan.py": "23678227d9b3c556f1bd903f4b5b3147c4a82ce5085e10055481026803451b80",
+    "validate_plan.py": "e31316aff6c814d1e1660a97b91cc0c0016d2b722c4d4092a71859a85bd0e65d",
     "validator_update_checks.json": "f997d0f3de2cea29550840b1d5cb23647d64f81329de46758551e2b6c8fecc27",
     "work_packages.json": "1913634b33ca25bec6d5a0a6a4d3d9258b7fd4c9c79c9ab426f21ac2b11c6e81"
   }
diff --git a/docs/plans/original-completion-2026-10-02/validate_plan.py b/docs/plans/original-completion-2026-10-02/validate_plan.py
index 5fa5eea..4090fb0 100644
--- a/docs/plans/original-completion-2026-10-02/validate_plan.py
+++ b/docs/plans/original-completion-2026-10-02/validate_plan.py
@@ -172,7 +172,7 @@ def main():
     pending = {d["id"] for d in decisions["pending"]}
     check("all10_pending_decision_groups", pending == {f"D{i:02d}" for i in range(1, 11)})
     check("known_decision_references", all(set(p["decisions"]) <= pending for p in packages))
-    check("all5_confirmed_decisions", {d["id"] for d in decisions["confirmed"]} == {f"A{i:02d}" for i in range(1, 6)})
+    check("all6_confirmed_decisions", {d["id"] for d in decisions["confirmed"]} == {f"A{i:02d}" for i in range(1, 7)})
     check("confirmed_decision_references_exist", all((PLAN / d["reference"]).is_file() for d in decisions["confirmed"] if "reference" in d))
     state_counts = dict(collections.Counter(p["state"] for p in packages))
     check("valid_package_states", all(p["state"] in states for p in packages))
diff --git a/scripts/mana/mana_network_service.gd b/scripts/mana/mana_network_service.gd
index e256c25..8b789fc 100644
--- a/scripts/mana/mana_network_service.gd
+++ b/scripts/mana/mana_network_service.gd
@@ -231,6 +231,15 @@ func get_storage_current(node_id: StringName) -> int:
 	return int(_nodes[node_id][&"current"])
 
 
+## Upkeep demand of every registered consumer, including disabled ones.
+func get_total_consumer_demand() -> int:
+	var total := 0
+	for node_id: StringName in _nodes:
+		if int(_nodes[node_id][&"kind"]) == NodeKind.CONSUMER:
+			total += int(_nodes[node_id][&"demand"])
+	return total
+
+
 func get_last_report() -> Dictionary:
 	return _last_report.duplicate(true)
 
diff --git a/scripts/mana/mana_reserve_cycle.gd b/scripts/mana/mana_reserve_cycle.gd
new file mode 100644
index 0000000..f70fcfe
--- /dev/null
+++ b/scripts/mana/mana_reserve_cycle.gd
@@ -0,0 +1,132 @@
+extends RefCounted
+
+## Approved finite Mana reserve contract A06 (MP-01-r02 recommended plan).
+## GameState keeps the stored amount so existing spending stays authoritative;
+## this owns the processed 10-minute boundary and the last flow, so a boundary
+## is consumed exactly once and replays after rollback reproduce the same flow.
+const VERSION := 1
+const POLICY_ID := &"MP-01-r02"
+const INITIAL_MANA := 100
+const CAPACITY := 300
+const WORLD_TREE_GENERATION := 20
+const INTERVAL_MINUTES := 10
+const FURNACE_YIELD := 100
+const LIMIT := 1000000000
+const FLOW_KEYS: Array[String] = [
+	"from_minute", "to_minute", "before", "generation", "furnace", "demand",
+	"consumed", "shortage", "overflow", "after",
+]
+
+var _minute := -1
+var _last_flow: Dictionary = {}
+
+func start_at(minute: Variant) -> bool:
+	if _minute >= 0 or typeof(minute) != TYPE_INT or minute < 0:
+		return false
+	_minute = minute - minute % INTERVAL_MINUTES
+	return true
+
+func get_minute() -> int:
+	return _minute
+
+func get_last_flow() -> Dictionary:
+	return _last_flow.duplicate(true)
+
+## Processes every boundary in (last boundary, minute]. Boundaries already
+## processed are no-ops, so per-minute callers and same-minute retries are safe.
+func advance_to(minute: Variant, before: Variant, demand: Variant) -> Dictionary:
+	if _minute < 0:
+		return _failure(&"NOT_STARTED")
+	if typeof(minute) != TYPE_INT or not _amount(before) or before > CAPACITY \
+			or typeof(demand) != TYPE_INT or demand < 0 or demand > LIMIT or minute < _minute:
+		return _failure(&"INVALID_FLOW")
+	var boundary: int = minute - minute % INTERVAL_MINUTES
+	if boundary <= _minute:
+		return {&"ok": true, &"processed": false, &"after": before}
+	var amount: int = before
+	var flow := {}
+	var count := 0
+	for to_minute: int in range(_minute + INTERVAL_MINUTES, boundary + 1, INTERVAL_MINUTES):
+		flow = plan(amount, demand, 0, to_minute - INTERVAL_MINUTES, to_minute)
+		amount = flow[&"after"]
+		count += 1
+	_minute = boundary
+	_last_flow = flow
+	return {&"ok": true, &"processed": true, &"boundaries": count, &"after": amount, &"flow": flow.duplicate(true)}
+
+## Furnace offers are judged after natural generation and upkeep demand are
+## paid: base_after = min(C, max(0, B + G - D)); accept only with 100 free.
+static func furnace_offer_accepted(before: int, demand: int) -> bool:
+	var base_after := mini(CAPACITY, maxi(0, before + WORLD_TREE_GENERATION - demand))
+	return CAPACITY - base_after >= FURNACE_YIELD
+
+static func plan(before: int, demand: int, furnace: int, start: int, end: int) -> Dictionary:
+	var available := before + WORLD_TREE_GENERATION + furnace
+	var consumed := mini(available, demand)
+	var remaining := available - consumed
+	return {&"from_minute": start, &"to_minute": end, &"before": before,
+		&"generation": WORLD_TREE_GENERATION, &"furnace": furnace, &"demand": demand,
+		&"consumed": consumed, &"shortage": demand - consumed,
+		&"overflow": maxi(remaining - CAPACITY, 0), &"after": mini(remaining, CAPACITY)}
+
+static func amount_is_valid(value: Variant) -> bool:
+	return _amount(value) and value <= CAPACITY
+
+func create_snapshot() -> Dictionary:
+	return {&"version": VERSION, &"policy_id": POLICY_ID, &"capacity": CAPACITY,
+		&"generation": WORLD_TREE_GENERATION, &"interval_minutes": INTERVAL_MINUTES,
+		&"minute": _minute, &"last_flow": _last_flow.duplicate(true)}
+
+## Validates fully before committing; a rejected snapshot leaves state intact.
+func restore_snapshot(source: Variant) -> bool:
+	if not source is Dictionary or not _keys(source, ["version", "policy_id", "capacity", "generation", "interval_minutes", "minute", "last_flow"]):
+		return false
+	if typeof(source["version"]) != TYPE_INT or source["version"] != VERSION \
+			or typeof(source["policy_id"]) not in [TYPE_STRING, TYPE_STRING_NAME] \
+			or StringName(source["policy_id"]) != POLICY_ID \
+			or typeof(source["capacity"]) != TYPE_INT or source["capacity"] != CAPACITY \
+			or typeof(source["generation"]) != TYPE_INT or source["generation"] != WORLD_TREE_GENERATION \
+			or typeof(source["interval_minutes"]) != TYPE_INT or source["interval_minutes"] != INTERVAL_MINUTES \
+			or not _amount(source["minute"]) or source["minute"] % INTERVAL_MINUTES != 0 \
+			or not source["last_flow"] is Dictionary:
+		return false
+	var flow: Dictionary = source["last_flow"]
+	if not flow.is_empty():
+		if not _keys(flow, FLOW_KEYS):
+			return false
+		for key: Variant in flow:
+			if not _amount(flow[key]):
+				return false
+		if flow["to_minute"] != source["minute"] or flow["before"] > CAPACITY \
+				or flow["generation"] != WORLD_TREE_GENERATION \
+				or flow["from_minute"] + INTERVAL_MINUTES != flow["to_minute"]:
+			return false
+		var expected := plan(flow["before"], flow["demand"], flow["furnace"], flow["from_minute"], flow["to_minute"])
+		if not _same_flow(expected, flow):
+			return false
+	_minute = source["minute"]
+	var normalized := {}
+	for key: Variant in flow:
+		normalized[StringName(key)] = flow[key]
+	_last_flow = normalized
+	return true
+
+static func _same_flow(expected: Dictionary, actual: Dictionary) -> bool:
+	for key: String in FLOW_KEYS:
+		if expected[StringName(key)] != actual[key]:
+			return false
+	return true
+
+static func _amount(value: Variant) -> bool:
+	return typeof(value) == TYPE_INT and value >= 0 and value <= LIMIT
+
+static func _keys(source: Dictionary, expected: Array) -> bool:
+	if source.size() != expected.size():
+		return false
+	for key: Variant in source:
+		if typeof(key) not in [TYPE_STRING, TYPE_STRING_NAME] or String(key) not in expected:
+			return false
+	return true
+
+static func _failure(code: StringName) -> Dictionary:
+	return {&"ok": false, &"code": code}
diff --git a/scripts/mana/mana_reserve_cycle.gd.uid b/scripts/mana/mana_reserve_cycle.gd.uid
new file mode 100644
index 0000000..6918a97
--- /dev/null
+++ b/scripts/mana/mana_reserve_cycle.gd.uid
@@ -0,0 +1 @@
+uid://dhi1bipyd67tx
diff --git a/tests/helpers/mana_outage.gd b/tests/helpers/mana_outage.gd
new file mode 100644
index 0000000..155d318
--- /dev/null
+++ b/tests/helpers/mana_outage.gd
@@ -0,0 +1,18 @@
+extends RefCounted
+
+## Test-only sustained reserve outage under the A06 finite Mana contract.
+## Zeroing the reserve alone recovers at the next 10-minute boundary because the
+## world tree keeps generating. A disabled consumer adds upkeep demand that the
+## reserve must pay but takes no local network allocation, so the tower stays
+## at 0 until release() without changing any other consumer's supply.
+const SINK_ID := &"test.mana_outage_sink"
+const SINK_DEMAND := 1000
+
+static func hold(runtime: Variant, state: Variant) -> void:
+	if runtime.mana_network_service.get_node(SINK_ID).is_empty():
+		runtime.mana_network_service.register_consumer(SINK_ID, SINK_DEMAND, ManaNetworkService.ConsumerPriority.NORMAL, false)
+	state.set_resource(&"mana", 0)
+
+static func release(runtime: Variant, state: Variant, amount := 100) -> void:
+	runtime.mana_network_service.unregister_node(SINK_ID)
+	state.set_resource(&"mana", amount)
diff --git a/tests/mvp/test_premium_room_guest_flow.gd b/tests/mvp/test_premium_room_guest_flow.gd
index e27a00c..5da8433 100644
--- a/tests/mvp/test_premium_room_guest_flow.gd
+++ b/tests/mvp/test_premium_room_guest_flow.gd
@@ -1,4 +1,5 @@
 extends SceneTree
+const ManaOutage = preload("res://tests/helpers/mana_outage.gd")
 var checks := 0
 var failures := 0
 var runtime: Variant
@@ -59,7 +60,7 @@ func run() -> void:
 	var mid: Dictionary=runtime.create_snapshot()
 	expect(runtime.restore_snapshot(mid), "real guest and in-progress premium service restore together")
 	var elapsed: int=runtime.facility_service.get_service(service_id).elapsed_minutes
-	state.set_resource(&"mana",0)
+	ManaOutage.hold(runtime, state)
 	clock.advance_minutes(15)
 	var paused: ServiceInstance=runtime.facility_service.get_service(service_id)
 	expect(paused.state==ServiceInstance.State.PAUSED and paused.elapsed_minutes==elapsed, "zero mana pauses actual guest lodging without consuming service time")
@@ -70,7 +71,7 @@ func run() -> void:
 	var saved := SaveService.load_snapshot(disk_path)
 	expect(saved[&"ok"] and runtime.restore_snapshot(saved[&"snapshot"]), "restore real guest, paused service and empty mana from disk")
 	SaveService.delete_save(disk_path)
-	state.set_resource(&"mana",100)
+	ManaOutage.release(runtime, state)
 
 	for minute in 370:
 		clock.advance_one_minute()
diff --git a/tests/s2/test_mana_reserve_cycle.gd b/tests/s2/test_mana_reserve_cycle.gd
new file mode 100644
index 0000000..11fc9ca
--- /dev/null
+++ b/tests/s2/test_mana_reserve_cycle.gd
@@ -0,0 +1,59 @@
+extends SceneTree
+const Cycle = preload("res://scripts/mana/mana_reserve_cycle.gd")
+var checks := 0
+var failures := 0
+func expect(ok: bool, message: String) -> void:
+	checks += 1
+	if not ok:
+		failures += 1
+		push_error(message)
+
+func run(before: int, demand: int, minutes: int) -> int:
+	var cycle = Cycle.new()
+	cycle.start_at(360)
+	var amount := before
+	for minute: int in range(361, 360 + minutes + 1):
+		var result: Dictionary = cycle.advance_to(minute, amount, demand)
+		amount = int(result[&"after"])
+	return amount
+
+func _initialize() -> void:
+	expect(Cycle.INITIAL_MANA == 100 and Cycle.CAPACITY == 300 and Cycle.WORLD_TREE_GENERATION == 20, "approved A06 values")
+	# Proposal comparison table (recommended column), F=0, start 360.
+	expect(run(100, 2, 120) == 300, "low load fills to capacity")
+	expect(run(100, 16, 120) == 148, "normal load 100+12*(20-16)")
+	expect(run(100, 63, 120) == 0, "overload depletes")
+	expect(run(0, 16, 10) == 4, "zero reserve recovers on next boundary")
+	expect(run(300, 2, 10) == 300, "full reserve keeps capacity")
+	var cycle = Cycle.new()
+	expect(not cycle.advance_to(370, 100, 16)[&"ok"], "unstarted cycle rejected")
+	expect(cycle.start_at(365) and cycle.get_minute() == 360, "start floors to boundary")
+	expect(not cycle.advance_to(369, 100, 16)[&"processed"], "non-boundary minute is a no-op")
+	var flow: Dictionary = cycle.advance_to(370, 100, 63)[&"flow"]
+	expect(flow[&"after"] == 57 and flow[&"consumed"] == 63 and flow[&"overflow"] == 0, "demand paid from generation and reserve")
+	var saved: Dictionary = cycle.create_snapshot()
+	expect(not cycle.advance_to(370, 57, 63)[&"processed"] and cycle.create_snapshot() == saved, "same boundary never consumed twice")
+	expect(not cycle.advance_to(360, 57, 63)[&"ok"], "time reversal rejected")
+	expect(not cycle.advance_to(380, 301, 0)[&"ok"] and cycle.create_snapshot() == saved, "over-capacity reserve rejected without change")
+	var skipped: Dictionary = cycle.advance_to(400, 57, 63)
+	expect(skipped[&"boundaries"] == 3 and skipped[&"after"] == 0 and skipped[&"flow"][&"shortage"] == 43, "skipped boundaries settle in order")
+	var restored = Cycle.new()
+	expect(restored.restore_snapshot(cycle.create_snapshot()) and restored.create_snapshot() == cycle.create_snapshot(), "snapshot round trip")
+	var corrupt: Dictionary = cycle.create_snapshot()
+	corrupt[&"last_flow"][&"after"] += 1
+	var untouched = Cycle.new()
+	expect(not untouched.restore_snapshot(corrupt) and untouched.get_minute() == -1, "tampered flow rejected atomically")
+	corrupt = cycle.create_snapshot()
+	corrupt[&"capacity"] = 600
+	expect(not untouched.restore_snapshot(corrupt), "foreign policy capacity rejected")
+	corrupt = cycle.create_snapshot()
+	corrupt[&"minute"] = 405
+	expect(not untouched.restore_snapshot(corrupt), "off-boundary minute rejected")
+	# Furnace is judged after natural generation and demand payment.
+	expect(not Cycle.furnace_offer_accepted(200, 16), "B=200 base_after 204 free 96 rejected")
+	expect(Cycle.furnace_offer_accepted(196, 16), "B=196 base_after 200 free 100 accepted")
+	expect(not Cycle.furnace_offer_accepted(300, 16), "B=300 full rejected")
+	expect(Cycle.plan(196, 16, 100, 360, 370)[&"after"] == 300, "accepted furnace offer fills exactly")
+	expect(Cycle.amount_is_valid(0) and Cycle.amount_is_valid(300) and not Cycle.amount_is_valid(301) and not Cycle.amount_is_valid(-1) and not Cycle.amount_is_valid(1.5), "legacy amount bounds")
+	print("%s: %d checks" % ["PASS" if failures == 0 else "FAIL", checks])
+	quit(failures)
diff --git a/tests/s2/test_mana_reserve_cycle.gd.uid b/tests/s2/test_mana_reserve_cycle.gd.uid
new file mode 100644
index 0000000..71aba22
--- /dev/null
+++ b/tests/s2/test_mana_reserve_cycle.gd.uid
@@ -0,0 +1 @@
+uid://de3w8hfsk83nt
diff --git a/tests/s2/test_runtime_mana_reserve.gd b/tests/s2/test_runtime_mana_reserve.gd
new file mode 100644
index 0000000..570b4cc
--- /dev/null
+++ b/tests/s2/test_runtime_mana_reserve.gd
@@ -0,0 +1,109 @@
+extends SceneTree
+
+const Cycle = preload("res://scripts/mana/mana_reserve_cycle.gd")
+var _checks := 0
+var _failures := 0
+var _clock: Variant
+var _state: Variant
+var _runtime: Variant
+
+
+func _initialize() -> void:
+	call_deferred("_run")
+
+
+func _run() -> void:
+	print("S2: runtime finite Mana reserve (A06)")
+	_reset_runtime()
+	_test_generation_and_demand()
+	_test_save_round_trip_and_migration()
+	_test_depletion_stops_tower()
+	_cleanup()
+	if _failures == 0:
+		print("PASS: %d checks" % _checks)
+	else:
+		push_error("FAIL: %d of %d checks failed" % [_failures, _checks])
+	quit(_failures)
+
+
+func _reset_runtime() -> void:
+	_cleanup()
+	_clock = load("res://autoload/game_clock.gd").new()
+	_state = load("res://autoload/game_state.gd").new()
+	_runtime = load("res://autoload/simulation_runtime.gd").new()
+	_clock.reset(1, 6, 0)
+	_state.reset()
+	var report: Dictionary = _runtime.initialize(_clock, _state, 3303)
+	_clock.set_paused(true)
+	_expect(report[&"valid"], "runtime initializes")
+	_expect(_state.get_resource(&"mana") == Cycle.INITIAL_MANA, "new game starts with approved 100 Mana")
+	_expect(_runtime.mana_reserve.get_minute() == _clock.absolute_minute, "reserve starts on the opening boundary")
+
+
+func _cleanup() -> void:
+	for node: Variant in [_runtime, _clock, _state]:
+		if node != null:
+			node.free()
+	_runtime = null
+	_clock = null
+	_state = null
+
+
+func _test_generation_and_demand() -> void:
+	_clock.advance_minutes(10)
+	var demand: int = _runtime.mana_network_service.get_total_consumer_demand()
+	var flow: Dictionary = _runtime.mana_reserve.get_last_flow()
+	_expect(flow[&"generation"] == 20 and flow[&"demand"] == demand, "boundary uses world tree 20 and registered demand")
+	_expect(_state.get_resource(&"mana") == mini(Cycle.CAPACITY, 100 + 20 - demand), "one boundary settles exactly once")
+	_clock.advance_minutes(9)
+	var mid: int = _state.get_resource(&"mana")
+	_expect(mid == int(flow[&"after"]), "no settlement between boundaries")
+	_clock.advance_minutes(200)
+	_expect(_state.get_resource(&"mana") <= Cycle.CAPACITY, "reserve never exceeds capacity")
+
+
+func _test_save_round_trip_and_migration() -> void:
+	var snapshot: Dictionary = _runtime.create_snapshot()
+	var runtime_data: Dictionary = snapshot[&"systems"][&"runtime"]
+	_expect(runtime_data.has(&"mana_reserve"), "new saves carry the reserve contract")
+	_expect(_runtime.restore_snapshot(snapshot.duplicate(true)), "current save restores")
+	_expect(_runtime.create_snapshot() == snapshot, "restored reserve state is identical")
+
+	var legacy: Dictionary = snapshot.duplicate(true)
+	legacy[&"systems"][&"runtime"].erase(&"mana_reserve")
+	legacy[&"game_state"][&"resources"][&"mana"] = 0
+	_expect(_runtime.restore_snapshot(legacy), "legacy save with explicit 0 migrates")
+	_expect(_state.get_resource(&"mana") == 0 and _runtime.mana_reserve.get_last_flow().is_empty(), "explicit 0 stays 0 with fresh reserve")
+
+	var over: Dictionary = snapshot.duplicate(true)
+	over[&"systems"][&"runtime"].erase(&"mana_reserve")
+	over[&"game_state"][&"resources"][&"mana"] = Cycle.CAPACITY + 1
+	var before: Dictionary = _runtime.create_snapshot()
+	_expect(not _runtime.restore_snapshot(over), "legacy amount over capacity is rejected")
+	_expect(_runtime.create_snapshot() == before, "rejected migration keeps live state")
+
+	var tampered: Dictionary = snapshot.duplicate(true)
+	tampered[&"systems"][&"runtime"][&"mana_reserve"][&"last_flow"][&"after"] += 1
+	_expect(not _runtime.restore_snapshot(tampered), "tampered reserve flow is rejected")
+	_expect(_runtime.restore_snapshot(snapshot.duplicate(true)), "original save still restores")
+
+
+func _test_depletion_stops_tower() -> void:
+	_state.set_resource(&"mana", 0)
+	var demand: int = _runtime.mana_network_service.get_total_consumer_demand()
+	_runtime.mana_network_service.register_consumer(&"test.mana_sink", 40)
+	_clock.advance_minutes(10 - (_clock.absolute_minute % 10))
+	_expect(_state.get_resource(&"mana") == 0, "demand above generation keeps the reserve at 0")
+	_expect(int(_runtime.mana_reserve.get_last_flow()[&"shortage"]) == demand + 40 - 20, "shortage is recorded")
+	_runtime.mana_network_service.unregister_node(&"test.mana_sink")
+	_clock.advance_minutes(10)
+	_expect(_state.get_resource(&"mana") == maxi(0, 20 - demand), "world tree recovers the reserve at the next boundary")
+
+
+func _expect(condition: bool, label: String) -> void:
+	_checks += 1
+	if condition:
+		print("  ✓ %s" % label)
+	else:
+		_failures += 1
+		push_error("  ✗ %s" % label)
diff --git a/tests/staff/test_rescue_elevator.gd b/tests/staff/test_rescue_elevator.gd
index c7295d4..c0a8d4b 100644
--- a/tests/staff/test_rescue_elevator.gd
+++ b/tests/staff/test_rescue_elevator.gd
@@ -1,4 +1,5 @@
 extends SceneTree
+const ManaOutage = preload("res://tests/helpers/mana_outage.gd")
 var checks := 0
 var failures := 0
 var runtime: Variant
@@ -50,7 +51,7 @@ func run() -> void:
 	expect(patient.current_cell == medic.current_cell and patient.health == 0 and runtime.elevators.get_report()[&"trips"].is_empty(), "emergency unloads both at the same floor without healing")
 	expect(runtime.restore_snapshot(runtime.create_snapshot()), "emergency pair release remains saveable")
 	expect(runtime.restore_snapshot(checkpoint), "restore boarded rescue pair for tower-wide depletion")
-	state.set_resource(&"mana", 0)
+	ManaOutage.hold(runtime, state)
 	clock.advance_minutes(1)
 	patient = runtime.staff_service.get_staff(&"patient"); medic = runtime.staff_service.get_staff(&"medic")
 	expect(patient.current_cell == medic.current_cell and patient.health == 0 and runtime.elevators.get_report()[&"trips"].is_empty(), "reserve depletion lands both rescue passengers together without healing")
@@ -60,7 +61,7 @@ func run() -> void:
 	expect(runtime.staff_service.get_staff(&"patient").health == 0 and runtime.staff_service.get_staff(&"patient").current_cell == landing, "stopped clinic cannot heal or teleport the landed patient")
 	var outage: Dictionary = runtime.create_snapshot()
 	expect(runtime.staff_service.validate_invariants()[&"ok"] and runtime.restore_snapshot(outage) and runtime.create_snapshot() == outage, "depleted rescue ownership survives exact complete save restoration")
-	state.set_resource(&"mana", 100)
+	ManaOutage.release(runtime, state)
 	clock.advance_minutes(100)
 	expect(runtime.staff_service.get_staff(&"patient").health == 100, "restored power resumes rescue and treatment for the same patient")
 	expect(runtime.staff_service.validate_invariants()[&"ok"] and runtime.restore_snapshot(runtime.create_snapshot()), "recovered rescue has no orphan ownership and remains saveable")
diff --git a/tests/staff/test_staff_dormitory.gd b/tests/staff/test_staff_dormitory.gd
index c67567d..2c42560 100644
--- a/tests/staff/test_staff_dormitory.gd
+++ b/tests/staff/test_staff_dormitory.gd
@@ -1,4 +1,5 @@
 extends SceneTree
+const ManaOutage = preload("res://tests/helpers/mana_outage.gd")
 var checks := 0
 var failures := 0
 var runtime: Variant
@@ -40,11 +41,11 @@ func run() -> void:
 	expect(runtime.create_snapshot()==arrived,"staff movement and recovery replay exactly")
 	worker=runtime.staff_service.get_staff(&"dorm_sleeper")
 	var health:=worker.health
-	state.set_resource(&"mana",0);clock.advance_minutes(30)
+	ManaOutage.hold(runtime, state);clock.advance_minutes(30)
 	expect(worker.health==health and not runtime.get_staff_rest_report(worker.staff_id).get(&"resting",false),"unpowered dormitory stops recovery")
 	expect(runtime.restore_snapshot(runtime.create_snapshot()),"stopped dormitory and staff position restore")
 	worker=runtime.staff_service.get_staff(&"dorm_sleeper")
-	state.set_resource(&"mana",100);clock.advance_minutes(40)
+	ManaOutage.release(runtime, state);clock.advance_minutes(40)
 	expect(worker.health>health,"power recovery resumes rest")
 	runtime.facility_service.set_operational_status(room_id,{&"operator_open":false},clock.absolute_minute)
 	health=worker.health;clock.advance_minutes(30)
diff --git a/tests/supply/test_supply_logistics_bridge.gd b/tests/supply/test_supply_logistics_bridge.gd
index 7f72f0f..73612a9 100644
--- a/tests/supply/test_supply_logistics_bridge.gd
+++ b/tests/supply/test_supply_logistics_bridge.gd
@@ -1,4 +1,5 @@
 extends SceneTree
+const ManaOutage = preload("res://tests/helpers/mana_outage.gd")
 
 ## Real construction, hired porter and purchased stock; failure injection is
 ## limited to route closures, capacity pressure and expired cargo.
@@ -363,12 +364,12 @@ func _finish() -> void:
 
 func _test_reserve_outage() -> void:
 	_expect(_runtime.restore_snapshot(_loaded), "restore physically loaded cargo for reserve outage")
-	_state.set_resource(&"mana", 0)
+	ManaOutage.hold(_runtime, _state)
 	_clock.advance_minutes(30)
 	_expect(_request().state == LogisticsRequest.State.DELIVERING and _quantity(_cargo()) == 8 and _quantity(_inventory(_destination)) == 0, "outage retains loaded cargo without delivering into stopped facility")
 	_expect(_crosslinks(), "outage preserves Request Task inventory ownership")
 	_expect(_runtime.restore_snapshot(_runtime.create_snapshot()), "cargo waiting through outage restores")
-	_state.set_resource(&"mana", 100)
+	ManaOutage.release(_runtime, _state)
 	_wait_for(LogisticsRequest.State.COMPLETED, 60)
 	_expect(_request().state == LogisticsRequest.State.COMPLETED and _quantity(_cargo()) == 0 and _quantity(_inventory(_destination)) == 8, "recovered power delivers cargo exactly once")
 	_expect(_crosslinks(), "recovered delivery ownership reconciles")
@@ -389,7 +390,7 @@ func _test_kitchen_reserve_outage() -> void:
 	if before[&"active_batch"].is_empty():
 		_runtime.restore_snapshot(_loaded)
 		return
-	_state.set_resource(&"mana", 0)
+	ManaOutage.hold(_runtime, _state)
 	_clock.advance_minutes(30)
 	var stopped: Dictionary = _runtime.kitchen_production.get_report(_destination)
 	_expect(stopped[&"state"] == &"NO_POWER" and stopped[&"active_batch"] == before[&"active_batch"], "thirty stopped minutes preserve batch identity reservations and progress")
@@ -397,7 +398,7 @@ func _test_kitchen_reserve_outage() -> void:
 	_expect(_runtime.kitchen_production.validate_crosslinks(), "stopped kitchen reservations remain owned")
 	var saved: Dictionary = _runtime.create_snapshot()
 	_expect(_runtime.restore_snapshot(saved) and _runtime.create_snapshot() == saved, "active cooking outage round trips through complete Runtime save")
-	_state.set_resource(&"mana", 100)
+	ManaOutage.release(_runtime, _state)
 	_clock.advance_minutes(30)
 	_expect(_quantity(_inventory(_destination)) == 4 and _runtime.inventory_service.total_quantity(_inventory(_destination), SupplyCatalog.BASIC_MEAL) == 4, "recovery consumes exactly four raw food and produces exactly four meals")
 	_expect(_runtime.kitchen_production.get_report(_destination)[&"state"] == &"TARGET_REACHED" and _runtime.kitchen_production.validate_crosslinks(), "recovered batch releases reservations and stops at target")
diff --git a/tests/transport/test_runtime_transport.gd b/tests/transport/test_runtime_transport.gd
index 96d8f7f..d03ef08 100644
--- a/tests/transport/test_runtime_transport.gd
+++ b/tests/transport/test_runtime_transport.gd
@@ -1,4 +1,5 @@
 extends SceneTree
+const ManaOutage = preload("res://tests/helpers/mana_outage.gd")
 
 const FixtureCleanup := preload("res://tests/helpers/ui_audio_fixture_cleanup.gd")
 var _finishing := false
@@ -128,7 +129,7 @@ func _verify_mid_ride() -> bool:
 	_expect(_runtime.restore_snapshot(snapshot), "rewind depletion drill to original passenger state")
 	for cell: Vector3i in shaft[&"stops"]:
 		_runtime.path_service.configure_cell_traffic(cell, 4, 0, true)
-	_state.set_resource(&"mana", 0)
+	ManaOutage.hold(_runtime, _state)
 	_clock.advance_minutes(1)
 	for actor_id: StringName in riders:
 		_expect(_runtime.elevators.get_actor_trip(actor_id).get(&"state") == PathService.ELEVATOR_REQUEST_BOARDED, "no safe landing retains boarded passenger instead of teleporting")
@@ -140,7 +141,7 @@ func _verify_mid_ride() -> bool:
 	_expect(_runtime.restore_snapshot(held_snapshot) and _runtime.create_snapshot() == held_snapshot, "no-landing outage preserves full Runtime save and passenger ownership")
 	for cell: Vector3i in shaft[&"stops"]:
 		_runtime.path_service.configure_cell_traffic(cell)
-	_state.set_resource(&"mana", 100)
+	ManaOutage.release(_runtime, _state)
 	_clock.advance_minutes(45)
 	for actor_id: StringName in riders:
 		_expect(_runtime.elevators.get_actor_trip(actor_id).is_empty() and _runtime.path_service.get_active_elevator_request(actor_id).is_empty(), "landing repair and power restoration release held trip ownership")