From 54b81605a3162988f174784fe55596a02cffbf51 Mon Sep 17 00:00:00 2001
From: Dennis Westermann <hey@dennis-westermann.de>
Date: Sun, 9 Aug 2026 23:12:02 +0200
Subject: [PATCH] feat(construction): enforce all building prerequisites

---
 .../Simulation/ConstructionSystemTests.cs     | 107 ++++++++++++++----
 .../EditMode/Simulation/VictorySystemTests.cs |  12 +-
 .../EditMode/Simulation/WeaponValuesTests.cs  |  21 +++-
 .../Scripts/Presentation/UI/BuildMenuHud.cs   |  42 +++++--
 .../Construction/ConstructionSystem.cs        |  46 ++++++--
 .../Simulation/Definitions/SimDefinitions.cs  |  75 +++++++-----
 CHANGELOG.md                                  |   7 ++
 docs/gamedesign/Buildings.md                  |  38 +++++--
 docs/production/DecisionLog.md                |  61 +++++++++-
 .../hashkrieg/16_Sprint_Wirtschaft.md         |  44 +++++--
 .../ConstructionSystemTests.cs                | 107 ++++++++++++++----
 .../VictorySystemTests.cs                     |  12 +-
 .../Nova.SimRunner.Tests/WeaponValuesTests.cs |  21 +++-
 13 files changed, 475 insertions(+), 118 deletions(-)

diff --git a/Assets/Tests/EditMode/Simulation/ConstructionSystemTests.cs b/Assets/Tests/EditMode/Simulation/ConstructionSystemTests.cs
index e6b6b74..cc63ded 100644
--- a/Assets/Tests/EditMode/Simulation/ConstructionSystemTests.cs
+++ b/Assets/Tests/EditMode/Simulation/ConstructionSystemTests.cs
@@ -149,6 +149,28 @@ public void Definitions_CoverBothFactions_WithTheDocumentedIdRule()
                 "the Refinery lost its Power-plant prerequisite in both factions (D-077); its draw is unchanged");
             Assert.That(SimDefinitions.TryGetBuilding(FactionId.Legion, UnitRole.Refinery, out SimBuildingDefinition refineryL)
                         && refineryL.PowerRequired == 15 && !refineryL.HasPrerequisite, Is.True);
+
+            var prerequisiteTable = new (UnitRole Role, UnitRoleMask Prerequisites)[]
+            {
+                (UnitRole.HQ, UnitRoleMask.None),
+                (UnitRole.Power, UnitRoleMask.HQ),
+                (UnitRole.Refinery, UnitRoleMask.None),
+                (UnitRole.Storage, UnitRoleMask.Refinery),
+                (UnitRole.Barracks, UnitRoleMask.HQ | UnitRoleMask.Power),
+                (UnitRole.VehicleFactory, UnitRoleMask.Refinery | UnitRoleMask.Barracks),
+                (UnitRole.ResearchLab, UnitRoleMask.VehicleFactory),
+                (UnitRole.Radar, UnitRoleMask.Power | UnitRoleMask.Barracks),
+                (UnitRole.DefensePlatform, UnitRoleMask.Power),
+            };
+            foreach (FactionId faction in new[] { FactionId.Alliance, FactionId.Legion })
+            {
+                foreach ((UnitRole role, UnitRoleMask prerequisites) in prerequisiteTable)
+                {
+                    Assert.That(SimDefinitions.TryGetBuilding(faction, role, out SimBuildingDefinition def), Is.True);
+                    Assert.That(def.PrerequisiteRoles, Is.EqualTo(prerequisites),
+                        $"{faction} {role} prerequisite mask");
+                }
+            }
         }
 
         [Test]
@@ -199,6 +221,8 @@ public void ValidatePlacement_ForeignFactionDefinition_IsRejectedInvalidTarget()
             // Legion one (id 24) — a known id naming unbuildable content is an
             // invalid target, exactly like an unknown one.
             var f = new Fixture(configure: e => e.SetSlotFaction(1, FactionId.Legion));
+            Assert.That(f.Construction.PlaceCompletedBuilding(1, 20, 36, 40).IsValid, Is.True,
+                "Legion HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(1, 22, 40, 40).IsValid, Is.True,
                 "Legion power provider so the power rule does not mask the faction check");
             f.Step(1); // commit the balance
@@ -218,10 +242,11 @@ public void ValidatePlacement_ForeignFactionDefinition_IsRejectedInvalidTarget()
         public void PlaceBuilding_LegionSlot_ChargesLegionCost_AndBuildsFaster()
         {
             var f = new Fixture(configure: e => e.SetSlotFaction(1, FactionId.Legion));
+            Assert.That(f.Construction.PlaceCompletedBuilding(1, 20, 36, 40).IsValid, Is.True, "Legion HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(1, 22, 40, 40).IsValid, Is.True, "Legion power provider");
             f.SpawnBuilder(1, 19, 20);
             f.Step(1); // commit the balance (Legion Power plant provides 80)
-            Assert.That(f.Economy.GetPlayerEconomy(1).PowerProvided, Is.EqualTo(80),
+            Assert.That(f.Economy.GetPlayerEconomy(1).PowerProvided, Is.EqualTo(110),
                 "the power recompute is faction-resolved");
 
             Assert.That(f.Construction.TryPlaceBuilding(1, 24, 20, 20), Is.True, "Legion Barracks def 24");
@@ -255,6 +280,7 @@ private static uint RawOfCompleted(Fixture f, byte slot, UnitRole role)
         public void PlaceBuilding_ChargesExactCost_AndCreatesSiteEntity()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             f.SpawnBuilder(0, 19, 20);
             f.Step(1); // commit the balance (phase-2 recompute)
@@ -297,6 +323,7 @@ public void PlaceBuilding_OccupiedOrOutOfMap_IsRejectedInvalidTarget()
             var f = new Fixture();
             f.SpawnBuilder(0, 19, 20);
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 20, 20).IsValid, Is.True, "Power plant at (20,20)");
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 4, 40, 40).IsValid, Is.True, "Storage prerequisite");
             f.Step(1); // commit the balance
 
             Assert.That(f.Construction.ValidatePlacement(0, 6, 21, 21), Is.EqualTo(CommandResultCode.RejectedInvalidTarget),
@@ -310,16 +337,47 @@ public void PlaceBuilding_OccupiedOrOutOfMap_IsRejectedInvalidTarget()
         }
 
         [Test]
-        public void PlaceBuilding_MissingPrerequisite_IsRejectedPrerequisitesNotMet()
+        public void PlaceBuilding_AllPrerequisitesAreRequired_AndUnknownBitsFailClosed()
         {
             var f = new Fixture();
             f.SpawnBuilder(0, 19, 20);
 
-            Assert.That(f.Construction.ValidatePlacement(0, 11, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet),
-                "a DefensePlatform requires a completed own Power plant");
+            UnitRoleMask barracksPrerequisites = UnitRoleMask.HQ | UnitRoleMask.Power;
+            Assert.That(f.Construction.GetMissingPrerequisiteRoles(0, barracksPrerequisites),
+                Is.EqualTo(barracksPrerequisites));
+            Assert.That(f.Construction.ValidatePlacement(0, 7, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet),
+                "Barracks requires both HQ and Power");
+
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True);
+            Assert.That(f.Construction.GetMissingPrerequisiteRoles(0, barracksPrerequisites),
+                Is.EqualTo(UnitRoleMask.Power), "HQ alone is insufficient");
+            Assert.That(f.Construction.ValidatePlacement(0, 7, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet));
+
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True);
-            f.Step(1); // commit the balance (100 provided)
-            Assert.That(f.Construction.ValidatePlacement(0, 11, 20, 20), Is.EqualTo(CommandResultCode.Applied));
+            Assert.That(f.Construction.GetMissingPrerequisiteRoles(0, barracksPrerequisites), Is.EqualTo(UnitRoleMask.None));
+            Assert.That(f.Construction.HasFinishedBuildings(0, barracksPrerequisites), Is.True);
+            f.Step(1); // commit the balance (130 provided)
+            Assert.That(f.Construction.ValidatePlacement(0, 7, 20, 20), Is.EqualTo(CommandResultCode.Applied));
+
+            var onlyPower = new Fixture();
+            Assert.That(onlyPower.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True);
+            Assert.That(onlyPower.Construction.GetMissingPrerequisiteRoles(0, barracksPrerequisites),
+                Is.EqualTo(UnitRoleMask.HQ), "Power alone is insufficient");
+
+            var foreign = new Fixture();
+            Assert.That(foreign.Construction.PlaceCompletedBuilding(1, 3, 40, 40).IsValid, Is.True);
+            Assert.That(foreign.Construction.GetMissingPrerequisiteRoles(0, UnitRoleMask.HQ),
+                Is.EqualTo(UnitRoleMask.HQ), "a foreign completed building does not satisfy the mask");
+
+            var unfinished = new Fixture(startingCredits: 3000);
+            unfinished.SpawnBuilder(0, 19, 20);
+            Assert.That(unfinished.Construction.TryPlaceBuilding(0, 3, 20, 20), Is.True, "own HQ site");
+            Assert.That(unfinished.Construction.GetMissingPrerequisiteRoles(0, UnitRoleMask.HQ),
+                Is.EqualTo(UnitRoleMask.HQ), "an own unfinished site does not satisfy the mask");
+
+            const UnitRoleMask unknownBit = (UnitRoleMask)(1u << 31);
+            Assert.That(f.Construction.GetMissingPrerequisiteRoles(0, unknownBit), Is.EqualTo(unknownBit));
+            Assert.That(f.Construction.HasFinishedBuildings(0, unknownBit), Is.False, "unknown roles fail closed");
         }
 
         [Test]
@@ -327,15 +385,16 @@ public void PlaceBuilding_PowerRule_RequiresSufficientFreePower()
         {
             var f = new Fixture();
             f.SpawnBuilder(0, 19, 20);
-            // Committed balance: HQ 30 provided, Refinery 20 required -> 10 free.
+            // Committed balance: HQ 30 provided, completed VehicleFactory 25
+            // required -> 5 free. The factory satisfies the ResearchLab's
+            // prerequisite, so only the power gate can reject it.
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 40, 40).IsValid, Is.True);
-            Assert.That(f.Construction.PlaceCompletedBuilding(0, 4, 44, 40).IsValid, Is.True);
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 8, 44, 40).IsValid, Is.True);
             f.Step(1); // let the economy recompute the balance
 
-            Assert.That(f.Construction.ValidatePlacement(0, 8, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet),
-                "VehicleFactory draws 25 but only 10 are free");
-            Assert.That(f.Construction.ValidatePlacement(0, 6, 20, 20), Is.EqualTo(CommandResultCode.Applied),
-                "Storage draws 5 of the 10 free power");
+            Assert.That(f.Construction.HasFinishedBuildings(0, UnitRoleMask.VehicleFactory), Is.True);
+            Assert.That(f.Construction.ValidatePlacement(0, 9, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet),
+                "ResearchLab draws 30 but only 5 are free");
             Assert.That(f.Construction.ValidatePlacement(0, 5, 60, 60), Is.EqualTo(CommandResultCode.Applied),
                 "power-providing buildings are exempt from the rule");
         }
@@ -366,6 +425,7 @@ public void RefineryPlacement_NeedsNoPowerPlant_TheCommandPathEnforcesOnlyThePow
         public void SiteProgress_RequiresBuilderInReach_PausesWhenAway()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             EntityId builder = f.SpawnBuilder(0, 60, 60); // far away
             f.Step(1); // commit the balance
@@ -391,8 +451,10 @@ public void SiteProgress_RequiresBuilderInReach_PausesWhenAway()
         public void SiteProgress_LowPower_ExactlyHalvesProgress()
         {
             var f = new Fixture();
-            // Low power: a completed Refinery draws 20 with nothing provided.
+            // Low power: an HQ provides 30 while two completed Refineries draw 40.
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 48, 40).IsValid, Is.True);
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 4, 40, 40).IsValid, Is.True);
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 4, 44, 40).IsValid, Is.True);
             f.SpawnBuilder(0, 19, 20);
             Assert.That(f.Construction.TryPlaceBuilding(0, 5, 20, 20), Is.True, "Power plant def 5, 150 ticks");
             f.Step(1);
@@ -413,13 +475,14 @@ public void SiteProgress_LowPower_ExactlyHalvesProgress()
             Assert.That(f.Entities.GetUnitRef(UnitCommandStateView.ToEntityId(siteRaw)).Role, Is.EqualTo(UnitRole.Power),
                 "the plant completes after exactly 300 low-power ticks");
             Assert.That(f.Construction.SiteCount, Is.EqualTo(0));
-            Assert.That(f.Construction.BuildingCount, Is.EqualTo(2));
+            Assert.That(f.Construction.BuildingCount, Is.EqualTo(4));
         }
 
         [Test]
         public void Completion_BecomesRoleEntity_PowerAppliesFromNextTick()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 40, 40).IsValid, Is.True, "HQ prerequisite");
             f.SpawnBuilder(0, 19, 20);
             Assert.That(f.Construction.TryPlaceBuilding(0, 5, 20, 20), Is.True);
             uint siteRaw = UnitCommandStateView.ToRawEntityId(SiteEntity(f));
@@ -430,10 +493,10 @@ public void Completion_BecomesRoleEntity_PowerAppliesFromNextTick()
             Assert.That(f.Entities.GetUnitRef(UnitCommandStateView.ToEntityId(siteRaw)).Role, Is.EqualTo(UnitRole.Power));
             Assert.That(f.Entities.GetUnitRef(UnitCommandStateView.ToEntityId(siteRaw)).CurrentHealth, Is.EqualTo(400),
                 "completion restores full HP");
-            Assert.That(f.Economy.GetPlayerEconomy(0).PowerProvided, Is.EqualTo(0),
+            Assert.That(f.Economy.GetPlayerEconomy(0).PowerProvided, Is.EqualTo(30),
                 "the economy ran before construction inside the completion tick");
             f.Step(1);
-            Assert.That(f.Economy.GetPlayerEconomy(0).PowerProvided, Is.EqualTo(100),
+            Assert.That(f.Economy.GetPlayerEconomy(0).PowerProvided, Is.EqualTo(130),
                 "power applies from the next economy recompute on");
         }
 
@@ -442,7 +505,7 @@ public void ResearchLabCompletion_UnlocksT2()
         {
             var f = new Fixture(startingCredits: 3000);
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True); // power
-            Assert.That(f.Construction.PlaceCompletedBuilding(0, 7, 44, 40).IsValid, Is.True); // barracks prerequisite
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 8, 44, 40).IsValid, Is.True); // VehicleFactory prerequisite
             f.SpawnBuilder(0, 19, 20);
             f.Step(1);
 
@@ -634,6 +697,7 @@ public void PlaceCompletedBuilding_Refinery_GrantsNothing_MatchStartIsUnchanged(
         public void CancelConstruction_Refunds75Percent_AndFreesFootprint()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             f.SpawnBuilder(0, 19, 20);
             f.Step(1); // commit the balance
@@ -657,6 +721,7 @@ public void CancelConstruction_Refunds75Percent_AndFreesFootprint()
         public void Sell_CompletedBuilding_Refunds50Percent_SiteIsNotSellable()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             EntityId barracks = f.Construction.PlaceCompletedBuilding(0, 7, 20, 20);
             uint raw = UnitCommandStateView.ToRawEntityId(barracks);
@@ -664,7 +729,7 @@ public void Sell_CompletedBuilding_Refunds50Percent_SiteIsNotSellable()
             Assert.That(f.Construction.SellBuilding(raw), Is.True);
             Assert.That(f.Economy.GetPlayerEconomy(0).AetheriumCredits, Is.EqualTo(1250L),
                 "1000 + 250 (50% floor, provisional)");
-            Assert.That(f.Construction.BuildingCount, Is.EqualTo(1), "only the Barracks was sold");
+            Assert.That(f.Construction.BuildingCount, Is.EqualTo(2), "only the Barracks was sold");
             Assert.That(f.Construction.IsCellFree(20, 20), Is.True);
 
             f.SpawnBuilder(0, 19, 20);
@@ -727,6 +792,7 @@ public void Repair_Validation_RejectsNonBuilder_AndUndamagedTarget()
         public void DestroyedSite_AbortsWithoutRefund_AndFreesFootprint()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             f.SpawnBuilder(0, 19, 20);
             f.Step(1); // commit the balance
@@ -745,12 +811,13 @@ public void DestroyedSite_AbortsWithoutRefund_AndFreesFootprint()
         public void Snapshot_Roundtrip_IsByteIdentical_AndTamperingIsRejected()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 40, 40).IsValid, Is.True, "HQ prerequisite");
             EntityId builder = f.SpawnBuilder(0, 19, 20);
             Assert.That(f.Construction.TryPlaceBuilding(0, 5, 20, 20), Is.True);
             EntityId barracks = f.Construction.PlaceCompletedBuilding(0, 7, 30, 30);
             f.Entities.GetUnitRef(barracks).CurrentHealth = 100;
             f.Construction.AssignRepairOrder(UnitCommandStateView.ToRawEntityId(builder), UnitCommandStateView.ToRawEntityId(barracks));
-            Assert.That(f.Construction.PlaceCompletedBuilding(0, 9, 40, 40).IsValid, Is.True); // T2 flag
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 9, 44, 40).IsValid, Is.True); // T2 flag
             f.Step(10); // accumulate some site progress
 
             var writer = new SnapshotBlockWriter();
@@ -780,6 +847,7 @@ public void Snapshot_Roundtrip_IsByteIdentical_AndTamperingIsRejected()
         public void Snapshot_AssignedBuilderRoleViolation_IsRejectedWithoutMutation()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             f.SpawnBuilder(0, 19, 20);
             EntityId soldier = f.Entities.SpawnUnit(
@@ -817,6 +885,7 @@ public void Snapshot_AssignedBuilderRoleViolation_IsRejectedWithoutMutation()
         public void ProgressSites_ReassignsNonBuilderAssignment_DefenseInDepth()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             EntityId builder = f.SpawnBuilder(0, 19, 20);
             f.Step(1);
diff --git a/Assets/Tests/EditMode/Simulation/VictorySystemTests.cs b/Assets/Tests/EditMode/Simulation/VictorySystemTests.cs
index 45502b7..542196f 100644
--- a/Assets/Tests/EditMode/Simulation/VictorySystemTests.cs
+++ b/Assets/Tests/EditMode/Simulation/VictorySystemTests.cs
@@ -32,9 +32,9 @@ public sealed class VictorySystemTests
         private const int Capacity = 64;
         private const ushort MapSize = 64;
 
-        /// <summary>Power plant / Barracks definition ids (SimDefinitions MS-1 table).</summary>
+        /// <summary>Power plant / DefensePlatform definition ids (SimDefinitions MS-1 table).</summary>
         private const ushort DefPower = 5;
-        private const ushort DefBarracks = 7;
+        private const ushort DefDefensePlatform = 11;
 
         /// <summary>
         /// Minimal canonical host: the systems the victory contract actually
@@ -371,13 +371,15 @@ public void ConstructionSite_CountsAsBuilding_AndKeepsTheSideAlive()
         {
             TestHost host = NewHost();
 
-            // Slot 0 gets a real construction site: power provider + builder
-            // + credits are the placement prerequisites.
+            // Slot 0 gets a real DefensePlatform site: power provider + builder
+            // + credits are the placement prerequisites. It deliberately has
+            // no HQ, so D-077's separate last-HQ defeat trigger cannot mask
+            // the D-056 site-counting behavior under test.
             EntityId power = host.Construction.PlaceCompletedBuilding(0, DefPower, 40, 40);
             Assert.That(power.IsValid, Is.True, "power provider");
             EntityId builder = host.SpawnUnit(0, 19, 20, UnitRole.Builder);
             host.Step(1);
-            Assert.That(host.Construction.TryPlaceBuilding(0, DefBarracks, 20, 20), Is.True, "Barracks site");
+            Assert.That(host.Construction.TryPlaceBuilding(0, DefDefensePlatform, 20, 20), Is.True, "DefensePlatform site");
             Assert.That(host.Construction.SiteCount, Is.EqualTo(1));
 
             // Slot 1 is the opponent that keeps the match two-sided.
diff --git a/Assets/Tests/EditMode/Simulation/WeaponValuesTests.cs b/Assets/Tests/EditMode/Simulation/WeaponValuesTests.cs
index adf6bbb..99b0563 100644
--- a/Assets/Tests/EditMode/Simulation/WeaponValuesTests.cs
+++ b/Assets/Tests/EditMode/Simulation/WeaponValuesTests.cs
@@ -232,6 +232,23 @@ public void DefinitionsHash64_IsStable_CoversBothFactions_AndIsNotAStub()
                 "the last Legion unit row is covered");
         }
 
+        [Test]
+        public void DefinitionsHash64_ChangesWhenPrerequisiteMaskChanges()
+        {
+            ulong canonical = SimDefinitions.ComputeDefinitionsHash64();
+            var buildings = SimDefinitions.AllBuildings.ToArray();
+            SimBuildingDefinition source = buildings[0];
+            buildings[0] = new SimBuildingDefinition(
+                source.DefinitionId, source.Faction, source.Role,
+                source.CostAE, source.BuildTicks, source.PowerProvided, source.PowerRequired,
+                source.PrerequisiteRoles | UnitRoleMask.Power, source.MaxHealth,
+                source.ArmorClass, source.DamageType, source.AttackDamage,
+                source.AttackRangeTiles, source.AttackCooldownTicks);
+
+            Assert.That(SimDefinitions.ComputeDefinitionsHash64(buildings, SimDefinitions.AllUnits),
+                Is.Not.EqualTo(canonical), "all-of prerequisite bits are fingerprint-covered");
+        }
+
         [Test]
         public void DefinitionsHash64_ChangesWhenAnyWeaponValueChanges()
         {
@@ -264,7 +281,7 @@ public void DefinitionsHash64_ChangesWhenAnyWeaponValueChanges()
                     buildings[i] = new SimBuildingDefinition(
                         buildings[i].DefinitionId, buildings[i].Faction, buildings[i].Role,
                         buildings[i].CostAE, buildings[i].BuildTicks, buildings[i].PowerProvided, buildings[i].PowerRequired,
-                        buildings[i].HasPrerequisite, buildings[i].PrerequisiteRole, buildings[i].MaxHealth,
+                        buildings[i].PrerequisiteRoles, buildings[i].MaxHealth,
                         buildings[i].ArmorClass, buildings[i].DamageType,
                         attackDamage: buildings[i].AttackDamage + 1, buildings[i].AttackRangeTiles, buildings[i].AttackCooldownTicks);
                 }
@@ -280,7 +297,7 @@ private static ulong HashWithMutatedBuilding(int index)
                 buildings[index].DefinitionId, buildings[index].Faction, buildings[index].Role,
                 costAE: buildings[index].CostAE + 1, buildings[index].BuildTicks,
                 buildings[index].PowerProvided, buildings[index].PowerRequired,
-                buildings[index].HasPrerequisite, buildings[index].PrerequisiteRole, buildings[index].MaxHealth,
+                buildings[index].PrerequisiteRoles, buildings[index].MaxHealth,
                 buildings[index].ArmorClass, buildings[index].DamageType,
                 buildings[index].AttackDamage, buildings[index].AttackRangeTiles, buildings[index].AttackCooldownTicks);
             return SimDefinitions.ComputeDefinitionsHash64(buildings, SimDefinitions.AllUnits);
diff --git a/Assets/_Project/Scripts/Presentation/UI/BuildMenuHud.cs b/Assets/_Project/Scripts/Presentation/UI/BuildMenuHud.cs
index d1163e6..cba83b2 100644
--- a/Assets/_Project/Scripts/Presentation/UI/BuildMenuHud.cs
+++ b/Assets/_Project/Scripts/Presentation/UI/BuildMenuHud.cs
@@ -39,7 +39,7 @@ namespace Nova.Presentation.UI
     /// and is not wired at runtime, so SimDefinitions is the honest source:
     /// the bar cannot drift from the executor. Availability mirrors the
     /// executor's own rule precisely — the prerequisite check is the sim's
-    /// <see cref="ConstructionSystem.HasFinishedBuilding"/> and the credit
+    /// <see cref="ConstructionSystem.HasFinishedBuildings"/> and the credit
     /// check is the balance the executor charges at placement.
     /// </para>
     /// <para>
@@ -64,6 +64,14 @@ public sealed class BuildMenuHud : MonoBehaviour
             UnitRole.Radar, UnitRole.DefensePlatform
         };
 
+        /// <summary>Stable display order for missing all-of prerequisites.</summary>
+        private static readonly UnitRole[] PrerequisiteDisplayOrder =
+        {
+            UnitRole.HQ, UnitRole.Power, UnitRole.Refinery, UnitRole.Storage,
+            UnitRole.Barracks, UnitRole.VehicleFactory, UnitRole.ResearchLab,
+            UnitRole.Radar, UnitRole.DefensePlatform
+        };
+
         /// <summary>
         /// The opening-loop hint. German, like the runbook: build a Refinery
         /// (Y), produce a Harvester (Q) at it, then harvest (H).
@@ -338,8 +346,7 @@ private void DrawBar()
         /// <summary>Entry availability, the executor's own rule: prerequisite finished (if any) and enough credits.</summary>
         private static bool IsAvailable(in SimBuildingDefinition def, byte slot, long credits, ConstructionSystem construction)
         {
-            bool prerequisiteMet = !def.HasPrerequisite
-                || construction.HasFinishedBuilding(slot, def.PrerequisiteRole);
+            bool prerequisiteMet = construction.HasFinishedBuildings(slot, def.PrerequisiteRoles);
             return prerequisiteMet && credits >= def.CostAE;
         }
 
@@ -418,14 +425,33 @@ private string ButtonLabel(UnitRole role, in SimBuildingDefinition def, float bu
         }
 
         /// <summary>The hovered entry's blocker, in the executor's own check order — prerequisite first, then affordability.</summary>
-        private static string BlockerReason(
+        private string BlockerReason(
             UnitRole role, in SimBuildingDefinition def, byte slot, long credits, ConstructionSystem construction)
         {
-            bool prerequisiteMet = !def.HasPrerequisite
-                || construction.HasFinishedBuilding(slot, def.PrerequisiteRole);
-            if (!prerequisiteMet)
+            UnitRoleMask missing = construction.GetMissingPrerequisiteRoles(slot, def.PrerequisiteRoles);
+            if (missing != UnitRoleMask.None)
             {
-                return $"{CommandCardPresenter.BuildingDisplayName(role)}: benötigt {CommandCardPresenter.BuildingDisplayName(def.PrerequisiteRole)}";
+                _builder.Clear();
+                _builder.Append(CommandCardPresenter.BuildingDisplayName(role)).Append(": benötigt ");
+                bool appended = false;
+                UnitRoleMask remaining = missing;
+                for (int i = 0; i < PrerequisiteDisplayOrder.Length; i++)
+                {
+                    UnitRole prerequisiteRole = PrerequisiteDisplayOrder[i];
+                    UnitRoleMask roleMask = (UnitRoleMask)(1u << (int)prerequisiteRole);
+                    if ((missing & roleMask) == UnitRoleMask.None) continue;
+
+                    if (appended) _builder.Append(" + ");
+                    _builder.Append(CommandCardPresenter.BuildingDisplayName(prerequisiteRole));
+                    appended = true;
+                    remaining &= ~roleMask;
+                }
+                if (remaining != UnitRoleMask.None)
+                {
+                    if (appended) _builder.Append(" + ");
+                    _builder.Append("unbekannte Voraussetzung 0x").Append(((uint)remaining).ToString("X8"));
+                }
+                return _builder.ToString();
             }
             return $"{CommandCardPresenter.BuildingDisplayName(role)}: nicht genug Aetherium";
         }
diff --git a/Assets/_Project/Scripts/Simulation/Construction/ConstructionSystem.cs b/Assets/_Project/Scripts/Simulation/Construction/ConstructionSystem.cs
index 669e01e..ce4dd18 100644
--- a/Assets/_Project/Scripts/Simulation/Construction/ConstructionSystem.cs
+++ b/Assets/_Project/Scripts/Simulation/Construction/ConstructionSystem.cs
@@ -289,21 +289,47 @@ public bool IsCompletedPlacement(uint rawEntityId)
             return IndexOfBuilding(rawEntityId) >= 0;
         }
 
-        /// <summary>True when the slot owns a COMPLETED building of the given role (prerequisite scans).</summary>
-        public bool HasFinishedBuilding(byte playerSlot, UnitRole role)
+        /// <summary>
+        /// Missing completed own building roles for an all-of prerequisite.
+        /// Unknown bits stay missing (fail closed).
+        /// </summary>
+        public UnitRoleMask GetMissingPrerequisiteRoles(byte playerSlot, UnitRoleMask requiredRoles)
         {
+            if (requiredRoles == UnitRoleMask.None) return UnitRoleMask.None;
+
+            UnitRoleMask completedRoles = UnitRoleMask.None;
             for (int i = 0; i < MaxBuildings; i++)
             {
                 if (!_buildings[i].IsActive) continue;
                 if (!SimDefinitions.TryGetBuilding(_buildings[i].BuildingDefId, out SimBuildingDefinition def)) continue;
-                if (def.Role != role) continue;
+
                 EntityId id = UnitCommandStateView.ToEntityId(_buildings[i].RawEntityId);
-                if (_entityManager.TryGetUnit(id, out UnitState unit) && unit.PlayerId == playerSlot)
-                {
-                    return true;
-                }
+                if (!_entityManager.TryGetUnit(id, out UnitState unit) || unit.PlayerId != playerSlot) continue;
+
+                completedRoles |= RoleMask(def.Role);
             }
-            return false;
+            return requiredRoles & ~completedRoles;
+        }
+
+        /// <summary>True when the slot owns every COMPLETED building role in the all-of mask.</summary>
+        public bool HasFinishedBuildings(byte playerSlot, UnitRoleMask requiredRoles)
+        {
+            return GetMissingPrerequisiteRoles(playerSlot, requiredRoles) == UnitRoleMask.None;
+        }
+
+        /// <summary>True when the slot owns a COMPLETED building of the given role (prerequisite scans).</summary>
+        public bool HasFinishedBuilding(byte playerSlot, UnitRole role)
+        {
+            UnitRoleMask roleMask = RoleMask(role);
+            return roleMask != UnitRoleMask.None && HasFinishedBuildings(playerSlot, roleMask);
+        }
+
+        private static UnitRoleMask RoleMask(UnitRole role)
+        {
+            int bit = (int)role;
+            return bit >= 0 && bit < 32
+                ? (UnitRoleMask)(1u << bit)
+                : UnitRoleMask.None;
         }
 
         // ------------------------------------------------------------------
@@ -314,7 +340,7 @@ public bool HasFinishedBuilding(byte playerSlot, UnitRole role)
         /// <summary>
         /// Full state-dependent placement validation in fixed order: unknown
         /// definition, foreign-faction definition, out-of-map footprint and
-        /// occupied cells (RejectedInvalidTarget), then prerequisite role,
+        /// occupied cells (RejectedInvalidTarget), then prerequisite roles,
         /// power rule and site capacity (RejectedPrerequisitesNotMet). Cost
         /// is the executor's separate check (RejectedInsufficientResources)
         /// and runs BEFORE this.
@@ -337,7 +363,7 @@ public CommandResultCode ValidatePlacement(byte playerSlot, ushort buildingDefId
             {
                 return CommandResultCode.RejectedInvalidTarget;
             }
-            if (def.HasPrerequisite && !HasFinishedBuilding(playerSlot, def.PrerequisiteRole))
+            if (!HasFinishedBuildings(playerSlot, def.PrerequisiteRoles))
             {
                 return CommandResultCode.RejectedPrerequisitesNotMet;
             }
diff --git a/Assets/_Project/Scripts/Simulation/Definitions/SimDefinitions.cs b/Assets/_Project/Scripts/Simulation/Definitions/SimDefinitions.cs
index 9148722..e229570 100644
--- a/Assets/_Project/Scripts/Simulation/Definitions/SimDefinitions.cs
+++ b/Assets/_Project/Scripts/Simulation/Definitions/SimDefinitions.cs
@@ -5,6 +5,26 @@
 
 namespace Nova.Simulation.Definitions
 {
+    /// <summary>
+    /// Set of completed own building roles required before placement. Bit n
+    /// is the stable wire value n of <see cref="UnitRole"/>; UnitRole itself
+    /// remains an unchanged single-value wire enum.
+    /// </summary>
+    [Flags]
+    public enum UnitRoleMask : uint
+    {
+        None = 0,
+        HQ = 1u << (int)UnitRole.HQ,
+        Refinery = 1u << (int)UnitRole.Refinery,
+        Power = 1u << (int)UnitRole.Power,
+        Storage = 1u << (int)UnitRole.Storage,
+        Barracks = 1u << (int)UnitRole.Barracks,
+        VehicleFactory = 1u << (int)UnitRole.VehicleFactory,
+        ResearchLab = 1u << (int)UnitRole.ResearchLab,
+        Radar = 1u << (int)UnitRole.Radar,
+        DefensePlatform = 1u << (int)UnitRole.DefensePlatform,
+    }
+
     /// <summary>
     /// Canonical numeric definition of one MS-1 building role of ONE faction
     /// (quality/content/mvp-v1.json section 3, factions[0]/factions[1]).
@@ -33,11 +53,11 @@ public readonly struct SimBuildingDefinition
         /// <summary>Power this building draws from its owner's grid once completed.</summary>
         public int PowerRequired { get; }
 
-        /// <summary>True when placement requires a completed own building of <see cref="PrerequisiteRole"/>.</summary>
-        public bool HasPrerequisite { get; }
+        /// <summary>All completed own building roles required for placement (all-of semantics).</summary>
+        public UnitRoleMask PrerequisiteRoles { get; }
 
-        /// <summary>Required completed own building role; meaningful only when <see cref="HasPrerequisite"/>.</summary>
-        public UnitRole PrerequisiteRole { get; }
+        /// <summary>True when <see cref="PrerequisiteRoles"/> is non-empty.</summary>
+        public bool HasPrerequisite => PrerequisiteRoles != UnitRoleMask.None;
 
         /// <summary>Hit points of the completed building.</summary>
         public int MaxHealth { get; }
@@ -84,7 +104,7 @@ public readonly struct SimBuildingDefinition
         public SimBuildingDefinition(
             ushort definitionId, FactionId faction, UnitRole role, int costAE, int buildTicks,
             int powerProvided, int powerRequired,
-            bool hasPrerequisite, UnitRole prerequisiteRole, int maxHealth,
+            UnitRoleMask prerequisiteRoles, int maxHealth,
             ArmorClass armorClass, DamageType damageType,
             int attackDamage, int attackRangeTiles, int attackCooldownTicks)
         {
@@ -95,8 +115,7 @@ public SimBuildingDefinition(
             BuildTicks = buildTicks;
             PowerProvided = powerProvided;
             PowerRequired = powerRequired;
-            HasPrerequisite = hasPrerequisite;
-            PrerequisiteRole = prerequisiteRole;
+            PrerequisiteRoles = prerequisiteRoles;
             MaxHealth = maxHealth;
             ArmorClass = armorClass;
             DamageType = damageType;
@@ -374,29 +393,29 @@ public static int HarvesterCargoCapacityAE(FactionId faction)
         private static readonly SimBuildingDefinition[] Buildings =
         {
             // --- Alliance (factions[0]) ---
-            new SimBuildingDefinition(3,  FactionId.Alliance, UnitRole.HQ,              costAE: 2500, buildTicks: 600, powerProvided: 30,  powerRequired: 0,  hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 2000, armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(5,  FactionId.Alliance, UnitRole.Power,           costAE: 450,  buildTicks: 150, powerProvided: 100, powerRequired: 0,  hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 400,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(4,  FactionId.Alliance, UnitRole.Refinery,        costAE: 700,  buildTicks: 200, powerProvided: 0,   powerRequired: 20, hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 800,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0), // D-077: no Power-plant prerequisite
-            new SimBuildingDefinition(6,  FactionId.Alliance, UnitRole.Storage,         costAE: 300,  buildTicks: 100, powerProvided: 0,   powerRequired: 5,  hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 400,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(7,  FactionId.Alliance, UnitRole.Barracks,        costAE: 500,  buildTicks: 180, powerProvided: 0,   powerRequired: 15, hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 600,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(8,  FactionId.Alliance, UnitRole.VehicleFactory,  costAE: 900,  buildTicks: 250, powerProvided: 0,   powerRequired: 25, hasPrerequisite: true,  prerequisiteRole: UnitRole.Refinery,  maxHealth: 900,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(9,  FactionId.Alliance, UnitRole.ResearchLab,     costAE: 1000, buildTicks: 300, powerProvided: 0,   powerRequired: 30, hasPrerequisite: true,  prerequisiteRole: UnitRole.Barracks,  maxHealth: 700,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(10, FactionId.Alliance, UnitRole.Radar,           costAE: 400,  buildTicks: 150, powerProvided: 0,   powerRequired: 20, hasPrerequisite: true,  prerequisiteRole: UnitRole.Power,     maxHealth: 500,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(11, FactionId.Alliance, UnitRole.DefensePlatform, costAE: 400,  buildTicks: 120, powerProvided: 0,   powerRequired: 10, hasPrerequisite: true,  prerequisiteRole: UnitRole.Power,     maxHealth: 600,  armorClass: ArmorClass.Building, damageType: DamageType.Kinetic,  attackDamage: 20, attackRangeTiles: 10, attackCooldownTicks: 10),
+            new SimBuildingDefinition(3,  FactionId.Alliance, UnitRole.HQ,              costAE: 2500, buildTicks: 600, powerProvided: 30,  powerRequired: 0,  prerequisiteRoles: UnitRoleMask.None,                         maxHealth: 2000, armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(5,  FactionId.Alliance, UnitRole.Power,           costAE: 450,  buildTicks: 150, powerProvided: 100, powerRequired: 0,  prerequisiteRoles: UnitRoleMask.HQ,                           maxHealth: 400,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(4,  FactionId.Alliance, UnitRole.Refinery,        costAE: 700,  buildTicks: 200, powerProvided: 0,   powerRequired: 20, prerequisiteRoles: UnitRoleMask.None,                         maxHealth: 800,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0), // D-077: no Power-plant prerequisite
+            new SimBuildingDefinition(6,  FactionId.Alliance, UnitRole.Storage,         costAE: 300,  buildTicks: 100, powerProvided: 0,   powerRequired: 5,  prerequisiteRoles: UnitRoleMask.Refinery,                     maxHealth: 400,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(7,  FactionId.Alliance, UnitRole.Barracks,        costAE: 500,  buildTicks: 180, powerProvided: 0,   powerRequired: 15, prerequisiteRoles: UnitRoleMask.HQ | UnitRoleMask.Power,       maxHealth: 600,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(8,  FactionId.Alliance, UnitRole.VehicleFactory,  costAE: 900,  buildTicks: 250, powerProvided: 0,   powerRequired: 25, prerequisiteRoles: UnitRoleMask.Refinery | UnitRoleMask.Barracks, maxHealth: 900, armorClass: ArmorClass.Building, damageType: Unarmed,          attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(9,  FactionId.Alliance, UnitRole.ResearchLab,     costAE: 1000, buildTicks: 300, powerProvided: 0,   powerRequired: 30, prerequisiteRoles: UnitRoleMask.VehicleFactory,               maxHealth: 700,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(10, FactionId.Alliance, UnitRole.Radar,           costAE: 400,  buildTicks: 150, powerProvided: 0,   powerRequired: 20, prerequisiteRoles: UnitRoleMask.Power | UnitRoleMask.Barracks, maxHealth: 500, armorClass: ArmorClass.Building, damageType: Unarmed,          attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(11, FactionId.Alliance, UnitRole.DefensePlatform, costAE: 400,  buildTicks: 120, powerProvided: 0,   powerRequired: 10, prerequisiteRoles: UnitRoleMask.Power,                        maxHealth: 600,  armorClass: ArmorClass.Building, damageType: DamageType.Kinetic, attackDamage: 20, attackRangeTiles: 10, attackCooldownTicks: 10),
 
             // --- Legion (factions[1]): Buildings.md section 2 concrete values;
             // HP derived: (alliance * 85) / 100 (derivation rule). The
             // DefensePlatform weapon stays identical — faction-neutral module
             // content (Buildings.md section 3). ---
-            new SimBuildingDefinition(20, FactionId.Legion,   UnitRole.HQ,              costAE: 2000, buildTicks: 500, powerProvided: 30,  powerRequired: 0,  hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 1700, armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(22, FactionId.Legion,   UnitRole.Power,           costAE: 350,  buildTicks: 120, powerProvided: 80,  powerRequired: 0,  hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 340,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(21, FactionId.Legion,   UnitRole.Refinery,        costAE: 550,  buildTicks: 160, powerProvided: 0,   powerRequired: 15, hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 680,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0), // D-077: no Power-plant prerequisite
-            new SimBuildingDefinition(23, FactionId.Legion,   UnitRole.Storage,         costAE: 250,  buildTicks: 80,  powerProvided: 0,   powerRequired: 5,  hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 340,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(24, FactionId.Legion,   UnitRole.Barracks,        costAE: 400,  buildTicks: 140, powerProvided: 0,   powerRequired: 10, hasPrerequisite: false, prerequisiteRole: UnitRole.Unit,      maxHealth: 510,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(25, FactionId.Legion,   UnitRole.VehicleFactory,  costAE: 700,  buildTicks: 200, powerProvided: 0,   powerRequired: 20, hasPrerequisite: true,  prerequisiteRole: UnitRole.Refinery,  maxHealth: 765,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(26, FactionId.Legion,   UnitRole.ResearchLab,     costAE: 800,  buildTicks: 240, powerProvided: 0,   powerRequired: 25, hasPrerequisite: true,  prerequisiteRole: UnitRole.Barracks,  maxHealth: 595,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(27, FactionId.Legion,   UnitRole.Radar,           costAE: 300,  buildTicks: 120, powerProvided: 0,   powerRequired: 15, hasPrerequisite: true,  prerequisiteRole: UnitRole.Power,     maxHealth: 425,  armorClass: ArmorClass.Building, damageType: Unarmed,             attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
-            new SimBuildingDefinition(28, FactionId.Legion,   UnitRole.DefensePlatform, costAE: 300,  buildTicks: 100, powerProvided: 0,   powerRequired: 8,  hasPrerequisite: true,  prerequisiteRole: UnitRole.Power,     maxHealth: 510,  armorClass: ArmorClass.Building, damageType: DamageType.Kinetic,  attackDamage: 20, attackRangeTiles: 10, attackCooldownTicks: 10),
+            new SimBuildingDefinition(20, FactionId.Legion,   UnitRole.HQ,              costAE: 2000, buildTicks: 500, powerProvided: 30,  powerRequired: 0,  prerequisiteRoles: UnitRoleMask.None,                         maxHealth: 1700, armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(22, FactionId.Legion,   UnitRole.Power,           costAE: 350,  buildTicks: 120, powerProvided: 80,  powerRequired: 0,  prerequisiteRoles: UnitRoleMask.HQ,                           maxHealth: 340,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(21, FactionId.Legion,   UnitRole.Refinery,        costAE: 550,  buildTicks: 160, powerProvided: 0,   powerRequired: 15, prerequisiteRoles: UnitRoleMask.None,                         maxHealth: 680,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0), // D-077: no Power-plant prerequisite
+            new SimBuildingDefinition(23, FactionId.Legion,   UnitRole.Storage,         costAE: 250,  buildTicks: 80,  powerProvided: 0,   powerRequired: 5,  prerequisiteRoles: UnitRoleMask.Refinery,                     maxHealth: 340,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(24, FactionId.Legion,   UnitRole.Barracks,        costAE: 400,  buildTicks: 140, powerProvided: 0,   powerRequired: 10, prerequisiteRoles: UnitRoleMask.HQ | UnitRoleMask.Power,       maxHealth: 510,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(25, FactionId.Legion,   UnitRole.VehicleFactory,  costAE: 700,  buildTicks: 200, powerProvided: 0,   powerRequired: 20, prerequisiteRoles: UnitRoleMask.Refinery | UnitRoleMask.Barracks, maxHealth: 765, armorClass: ArmorClass.Building, damageType: Unarmed,          attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(26, FactionId.Legion,   UnitRole.ResearchLab,     costAE: 800,  buildTicks: 240, powerProvided: 0,   powerRequired: 25, prerequisiteRoles: UnitRoleMask.VehicleFactory,               maxHealth: 595,  armorClass: ArmorClass.Building, damageType: Unarmed,            attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(27, FactionId.Legion,   UnitRole.Radar,           costAE: 300,  buildTicks: 120, powerProvided: 0,   powerRequired: 15, prerequisiteRoles: UnitRoleMask.Power | UnitRoleMask.Barracks, maxHealth: 425, armorClass: ArmorClass.Building, damageType: Unarmed,          attackDamage: 0,  attackRangeTiles: 0,  attackCooldownTicks: 0),
+            new SimBuildingDefinition(28, FactionId.Legion,   UnitRole.DefensePlatform, costAE: 300,  buildTicks: 100, powerProvided: 0,   powerRequired: 8,  prerequisiteRoles: UnitRoleMask.Power,                        maxHealth: 510,  armorClass: ArmorClass.Building, damageType: DamageType.Kinetic, attackDamage: 20, attackRangeTiles: 10, attackCooldownTicks: 10),
         };
 
         private static readonly SimUnitDefinition[] Units =
@@ -540,7 +559,7 @@ public static bool IsBuildingRole(UnitRole role)
         /// 21-field layout in canonical order: kind u8 (0 = building, 1 =
         /// unit), faction u8, role u8, costAE i32, buildTicks i32,
         /// powerProvided i32, powerRequired i32, hasPrerequisite u8,
-        /// prerequisiteRole u8, tier u8, producerRole u8, maxHealth i32,
+        /// prerequisiteRoles u32, tier u8, producerRole u8, maxHealth i32,
         /// moveSpeed raw i32, armorClass u8, damageType u8, attackDamage i32,
         /// attackRangeTiles i32, attackCooldownTicks i32, cargoCapacityAE i32.
         /// Fields a kind does
@@ -598,7 +617,7 @@ private static void WriteBuildingRow(SimHashWriter hash, in SimBuildingDefinitio
             hash.WriteInt32(def.PowerProvided);
             hash.WriteInt32(def.PowerRequired);
             hash.WriteUInt8(def.HasPrerequisite ? (byte)1 : (byte)0);
-            hash.WriteUInt8((byte)def.PrerequisiteRole);
+            hash.WriteUInt32((uint)def.PrerequisiteRoles);
             hash.WriteUInt8(0); // tier: buildings have none
             hash.WriteUInt8(0); // producerRole: buildings have none
             hash.WriteInt32(def.MaxHealth);
@@ -622,7 +641,7 @@ private static void WriteUnitRow(SimHashWriter hash, in SimUnitDefinition def)
             hash.WriteInt32(0); // powerProvided: units have none
             hash.WriteInt32(0); // powerRequired: units have none
             hash.WriteUInt8(0); // hasPrerequisite: units have none
-            hash.WriteUInt8(0); // prerequisiteRole: units have none
+            hash.WriteUInt32(0); // prerequisiteRoles: units have none
             hash.WriteUInt8(def.Tier);
             hash.WriteUInt8((byte)def.ProducerRole);
             hash.WriteInt32(def.MaxHealth);
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f149aaf..a703324 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -154,6 +154,13 @@ die Versionierung folgt (in der aktuellen Doku-Phase) dem Dokumentationsstand de
   gespulte Partie ohne dieses Etikett nichts wert ist.
 
 ### Geändert
+- **16.8/D-103: Bauvoraussetzungen sind jetzt echte All-of-Ketten.** Eine
+  separate `UnitRoleMask` ersetzt das singuläre `PrerequisiteRole`, beide
+  Fraktionen verwenden dieselbe neun Rollen umfassende Kette, und Executor wie
+  Baubar leiten alle fehlenden fertigen eigenen Gebäude aus derselben
+  fail-closed Maske ab. Die Maske ist vollständig vom `DefinitionsHash64`
+  gedeckt; Relay und Clients müssen daher aus demselben Commit stammen. Kein
+  Zustands- oder Befehlsformat und keine Golden-Baseline wurde geändert.
 - **Der Ausgangspin der kanonischen KI-Partie ist vom Identitätspin getrennt
   (D-101).** `SkirmishAiTests` pinnte Kennung, Entscheidungstick und
   Endzustands-Hash in einer Zusicherung. Die beiden Zahlen bewegen sich aber bei
diff --git a/docs/gamedesign/Buildings.md b/docs/gamedesign/Buildings.md
index af1262a..3970341 100644
--- a/docs/gamedesign/Buildings.md
+++ b/docs/gamedesign/Buildings.md
@@ -1,6 +1,6 @@
 # Gebäude – alle Fraktionen
 
-**Version:** 0.5.0 | **Status:** Entwurf – MS-1-Override verbindlich | **Verantwortungsbereich:** Lead Gameplay Designer | **Sprint:** 4
+**Version:** 0.6.0 | **Status:** Entwurf – MS-1-Override verbindlich | **Verantwortungsbereich:** Lead Gameplay Designer | **Sprint:** 16
 
 ## Zweck
 
@@ -8,7 +8,7 @@ Spielbare Spezifikation aller 12 Gebäudetypen (D-008) für die drei Fraktionen
 
 ## Abhängigkeiten
 
-- [../production/DecisionLog.md](../production/DecisionLog.md) – D-008 (12 Typen), D-010 (Aetherium-Wirtschaft), D-011 (Evolvierte-Wachstum), D-012 (Zerstörbarkeit), D-022 (Capture-System), D-023 (Superwaffen-Limit), D-024 (Lager & Raffinerie), D-030 (Low-Power/Forschung)
+- [../production/DecisionLog.md](../production/DecisionLog.md) – D-008 (12 Typen), D-010 (Aetherium-Wirtschaft), D-011 (Evolvierte-Wachstum), D-012 (Zerstörbarkeit), D-022 (Capture-System), D-023 (Superwaffen-Limit), D-024 (Lager & Raffinerie), D-030 (Low-Power/Forschung), D-103 (MS-1-Bauvoraussetzungen)
 - [./Factions.md](./Factions.md) – Fraktionsidentitäten
 - [./Economy.md](./Economy.md) – AE-Währung, Energie, Low-Power-Regel, Harvester-Werte, Lager-Kapazität (D-024)
 - [./ResearchTree.md](./ResearchTree.md) – Tech-Tiers 1–3
@@ -25,13 +25,32 @@ Raffinerie, Lager, Kaserne, Fahrzeugfabrik, Forschungslabor, Radar und
 Verteidigungsplattform – jeweils mit den dort festgelegten Allianz- und
 Legionsnamen. Mauern, Flugfeld und Superwaffe bleiben Post-MVP.
 
-Jede Seite startet mit fertiggestelltem HQ und fertiggestellter Raffinerie. Nur
-diese Start-Raffinerie darf ihre normale Kraftwerk-Voraussetzung umgehen und
-erzeugt keinen zusätzlichen Harvester. Ein fertiggestelltes Forschungslabor
-schaltet T2 unmittelbar frei; Forschung, Forschungsqueue und T3 sind
-deaktiviert. Die Verteidigungsplattform unterstützt `MG` auf T1 und `Rocket`
-auf T2; `Flak` ist nicht Teil von MS-1. Bei Widerspruch übersteuert dieser
-Abschnitt den nachfolgenden Vollspielentwurf.
+Jede Seite startet gemäß D-077 mit einem fertiggestellten HQ und einem Builder,
+aber ohne Raffinerie. Die erste fertiggebaute Raffinerie erzeugt den ersten
+Harvester; die Raffinerie selbst hat in MS-1 keine Bauvoraussetzung.
+
+Für die Platzierung gelten gemäß D-103 folgende **All-of-Voraussetzungen** bei
+Allianz und Legion identisch. Jeder genannte Gebäudetyp muss als eigenes,
+fertiggestelltes Gebäude vorhanden sein; Baustellen genügen nicht.
+
+| Gebäude | MS-1-Platzierungsvoraussetzungen |
+|---|---|
+| HQ | keine |
+| Kraftwerk | HQ |
+| Raffinerie | keine |
+| Lager | Raffinerie |
+| Kaserne | HQ **und** Kraftwerk |
+| Fahrzeugfabrik | Raffinerie **und** Kaserne |
+| Forschungslabor | Fahrzeugfabrik |
+| Radar | Kraftwerk **und** Kaserne |
+| Verteidigungsplattform (Basis) | Kraftwerk |
+
+Ein fertiggestelltes Forschungslabor schaltet T2 unmittelbar frei; Forschung,
+Forschungsqueue und T3 sind deaktiviert. Die Voraussetzung der
+Verteidigungsplattform meint nur das Basisgebäude. Die Modulfreischaltungen aus
+§3 (Kaserne/Radar/Forschungslabor) bleiben davon getrennt. Die Plattform
+unterstützt `MG` auf T1 und `Rocket` auf T2; `Flak` ist nicht Teil von MS-1.
+Bei Widerspruch übersteuert dieser Abschnitt den nachfolgenden Vollspielentwurf.
 
 ## 1. Grundprinzipien
 
@@ -267,3 +286,4 @@ Entschieden und entfernt im Korrekturlauf Sprint 4: HQ-Grundenergie (+30 führen
 | 0.4.0 | 2026-07-21 | Korrekturlauf Sprint 4 (D-043–D-052, Review-Findings): als führende Quelle für Gebäudekosten/-energie/-bauzeiten festgelegt (Review F-03, D-047-Grundsatzregel); Offene Punkte bereinigt | Lead Gameplay Designer |
 | 0.4.1 | 2026-07-21 | Offener Punkt "Flak-DPS-Korridor" geschlossen: veralteter Querverweis auf Aircraft.md (90 DPS) entfernt, auf Weapons.md als einzige Werte-Quelle (25–40 Schaden/1,5 s, ×2,0 vs. Luft ≈ 33–53 DPS, D-047) umformuliert | Lead Gameplay Designer |
 | 0.5.0 | 2026-07-24 | Neun Gebäuderollen, Start-Ausnahme, T2-Freischaltung und MG-/Raketenmodule für MS-1 gemäß D-056 abgegrenzt | Lead Gameplay Designer |
+| 0.6.0 | 2026-08-09 | D-077-Startzustand berichtigt und die neun All-of-Platzierungsvoraussetzungen samt Trennung von Plattformbasis und Modulen gemäß D-103 festgeschrieben | Agent (unter Delegation) |
diff --git a/docs/production/DecisionLog.md b/docs/production/DecisionLog.md
index 4c4e8b5..321f7b6 100644
--- a/docs/production/DecisionLog.md
+++ b/docs/production/DecisionLog.md
@@ -1,6 +1,6 @@
 # Decision Log
 
-**Version:** 1.33.0 | **Status:** aktiv (laufend) | **Verantwortungsbereich:** Game Director / Lead Technical Director / Project Owner | **Sprint:** 16
+**Version:** 1.35.0 | **Status:** aktiv (laufend) | **Verantwortungsbereich:** Game Director / Lead Technical Director / Project Owner | **Sprint:** 16
 
 ## Zweck
 
@@ -2992,6 +2992,64 @@ die Zusicherung dort schrumpft auf eine Zeile, der erklärende Kommentar
 verweist auf die neue Datei. Der Einheitenstrang ist zu informieren (Issue #75).
 Wer den Harness umbenennt, sagt es an. Keine Baseline-Datei ist berührt.
 
+---
+
+### D-103 | verbindlich | Sprint 16 (Bauvoraussetzungen werden eine All-of-Bitmaske)
+
+**Status:** Am 2026-08-09 vom Agenten unter ausdrücklicher Inhaberdelegation
+entschieden; überstimmbar. Umsetzung und Integrationsnachweis in Paket 16.8.
+
+**Kontext:** `SimBuildingDefinition.PrerequisiteRole` konnte genau eine fertige
+Gebäuderolle ausdrücken. Der verbindliche Gebäudeentwurf nennt dagegen für
+Kaserne, Fahrzeugfabrik und Radar mehrere gleichzeitige Voraussetzungen. Eine
+zweite Spezialprüfung pro Rolle würde Definitionstabelle, Executor und UI
+auseinanderlaufen lassen. Das Feld ist außerdem Teil von `DefinitionsHash64`;
+seine Darstellung ist deshalb Match- und Relay-Kompatibilität, nicht nur eine
+lokale C#-Signatur.
+
+**Alternativen:**
+
+1. Das einzelne Feld behalten und Mehrfachregeln im `ConstructionSystem`
+   hartcodieren — verworfen, weil Definition, Executor und Baubar dann drei
+   Wahrheiten pflegen.
+2. Eine variable Liste je Definition — verworfen, weil sie Allokation,
+   Ordnungsregeln und eine längere Hash-Kodierung einführt, obwohl höchstens
+   neun stabile Rollen abzubilden sind.
+3. **Gewählt: eine `uint`-Bitmaske über die unveränderten `UnitRole`-Wirewerte.**
+   Bit `n` steht für Rollenwert `n`; die Prüfung verlangt alle gesetzten Bits.
+
+**Entscheidung:**
+
+1. `UnitRole` bleibt unverändert. `UnitRoleMask` ist ein separates
+   `[Flags]`-Enum; `SimBuildingDefinition.PrerequisiteRoles` ersetzt das
+   singuläre Feld. `HasPrerequisite` bleibt abgeleitet (`mask != 0`).
+2. Allianz und Legion verwenden identisch: HQ keine; Kraftwerk HQ; Raffinerie
+   keine; Lager Raffinerie; Kaserne HQ + Kraftwerk; Fahrzeugfabrik Raffinerie +
+   Kaserne; Forschungslabor Fahrzeugfabrik; Radar Kraftwerk + Kaserne;
+   Verteidigungsplattform Kraftwerk.
+3. Die Raffinerie bleibt gemäß D-077 voraussetzungslos. Bei der
+   Verteidigungsplattform betrifft die Kraftwerk-Voraussetzung nur die Basis;
+   Modulfreischaltungen bleiben ein getrennter Vertrag.
+4. Nur eigene, fertiggestellte Gebäude erfüllen Bits. Baustellen, fremde
+   Gebäude und unbekannte Bits erfüllen nichts; unbekannte Bits scheitern damit
+   geschlossen.
+5. `DefinitionsHash64` schreibt weiterhin den abgeleiteten
+   `hasPrerequisite u8` und danach die vollständige Maske als `u32`. Der Hash
+   bewegt sich absichtlich; Relay und Clients müssen aus demselben Commit
+   stammen. Zustands-, Befehls- und Relay-Protokollversionen ändern sich nicht.
+
+**Begründung:** Die Maske ist die kleinste tabellarische Darstellung, die
+All-of vollständig ausdrückt, ohne `UnitRole` oder persistenten Zustand zu
+verändern. Eine gemeinsame Missing-Mask-Abfrage lässt Executor und UI exakt
+dieselbe Semantik verwenden und kann alle fehlenden Rollen stabil benennen.
+
+**Konsequenzen:** Die Skirmish-KI muss vor der Kaserne ein Kraftwerk planen.
+Dieser Eingriff liegt im extern verwalteten `Scripts/AI*`-Bereich und erfolgt
+koordiniert als eigener Handoff; Paket 16.8 wird ohne dessen grünen
+Integrationslauf nicht gemergt. Der Definitions-Hash macht alte Relay-/Client-
+Builds bewusst inkompatibel. Keine Golden-Baseline und kein persistentes
+Zustandsformat wird in diesem Paket geändert.
+
 ## Offene Punkte
 
 - Alle Sprint-4-Review-Befunde (105, davon 9 kritisch): 7 entscheidungsbedürftige kritische Befunde sind durch D-043–D-052 entschieden.
@@ -3072,6 +3130,7 @@ Wer den Harness umbenennt, sagt es an. Keine Baseline-Datei ist berührt.
 
 | Version | Datum | Änderung | Autor |
 |---|---|---|---|
+| 1.35.0 | 2026-08-09 | D-103 aufgenommen: Bauvoraussetzungen werden eine fraktionsgleiche All-of-Maske über unveränderte `UnitRole`-Wirewerte; Hash-, Fail-Closed-, Plattformmodul- und KI-Handoff-Folgen festgeschrieben | Agent (unter Delegation) |
 | 1.33.0 | 2026-08-09 | D-101 aufgenommen: der Ausgangspin der kanonischen KI-Partie (Entscheidungstick, Endzustand) wird vom Identitätspin getrennt und zieht in eine Maintainer-Datei; `tools/Nova.SimRunner.Tests/` bekommt erstmals eine Eigentümerzeile | Project Owner / Orchestrator |
 | 1.0.0 | 2026-07-21 | D-001 bis D-005 aus Sprint 0 protokolliert | Game Director |
 | 1.1.0 | 2026-07-21 | D-006 (Unity 6.3 LTS + URP bestätigt) aus Sprint-1-Validierung | Lead Technical Director |
diff --git a/docs/production/hashkrieg/16_Sprint_Wirtschaft.md b/docs/production/hashkrieg/16_Sprint_Wirtschaft.md
index 8b02f2d..21ac15e 100644
--- a/docs/production/hashkrieg/16_Sprint_Wirtschaft.md
+++ b/docs/production/hashkrieg/16_Sprint_Wirtschaft.md
@@ -1,6 +1,6 @@
 # Sprint 16: Die Wirtschaft trägt sich selbst — kein Gebäude kostet Geld, ohne etwas zu tun
 
-**Version:** 1.0.0 | **Status:** geplant | **Verantwortungsbereich:** Netzstrang (Maintainer) | **Sprint:** 16 | **Vorgänger:** [12_Sprint_Zu_Zweit.md](12_Sprint_Zu_Zweit.md) Strang C | **Parallel zu:** [13B](13B_Sprint_Einheitenverhalten.md) | **Regelwerk:** [13-15_Parallelbetrieb.md](13-15_Parallelbetrieb.md) | **UX-Gate:** human | **Leitsatz:** ein Gebäude, das Strom zieht und nichts tut, ist kein Platzhalter, sondern ein Schaden
+**Version:** 1.2.0 | **Status:** in Umsetzung | **Verantwortungsbereich:** Netzstrang (Maintainer) | **Sprint:** 16 | **Vorgänger:** [12_Sprint_Zu_Zweit.md](12_Sprint_Zu_Zweit.md) Strang C | **Parallel zu:** [13B](13B_Sprint_Einheitenverhalten.md) | **Regelwerk:** [13-15_Parallelbetrieb.md](13-15_Parallelbetrieb.md) | **UX-Gate:** human | **Leitsatz:** ein Gebäude, das Strom zieht und nichts tut, ist kein Platzhalter, sondern ein Schaden
 
 ## Zweck
 
@@ -60,7 +60,7 @@ sondern ein Platzierungsfehler.** Das ändert den Aufwand, nicht die Dringlichke
 | `Scripts/Simulation/Production/` | 16.2 |
 | `Scripts/Simulation/Vision/FogOfWarSystem.cs` | 16.5 — Vertragsfläche, `GetTeamView` bleibt unverändert |
 | `Scripts/Simulation/State/UnitCommandStateView.cs` | 16.10 — **nur Befehlsanwendung**, kein Feld, keine Reihenfolge, kein `StateVersion` |
-| `Scripts/Simulation/Definitions/SimDefinitions.cs` | 16.8 — `PrerequisiteRole`. **Geteilt mit 13B, Absprache vor dem PR** |
+| `Scripts/Simulation/Definitions/SimDefinitions.cs` | 16.8 — `PrerequisiteRoles`. **Geteilt mit 13B, Absprache vor dem PR** |
 | `Scripts/Gameplay/Match/MatchBootstrap.cs` | 16.7 — Startaufstellung |
 | `Scripts/Presentation/Maps/GlutrinneBlockoutView.cs` | 16.7 — Feldmarker und Steinstreu-Ausschluss |
 | `Scripts/Presentation/UI/` (`BuildMenuHud`, `MinimapHud`, `MatchFrameHud`) | 16.5, 16.10 |
@@ -220,14 +220,37 @@ Der Definitions-Hash bewegt sich hier **nicht** — das tut nur 16.8.
 
 ### 16.8 · Die Bauvoraussetzungs-Kette (C5) — **fasst `SimDefinitions` an**
 
-`SimBuildingDefinition.PrerequisiteRole` ist ein **einzelnes** Feld; das Design
-nennt für sechs von neun Rollen Mehrfachvoraussetzungen. Eine Bitmaske über
-`UnitRole` reicht.
+`SimBuildingDefinition.PrerequisiteRole` war ein **einzelnes** Feld. D-103
+ersetzt es durch `UnitRoleMask PrerequisiteRoles`; `UnitRole` selbst bleibt als
+Wire-Enum unverändert. Die Prüfung ist All-of und scheitert bei unbekannten Bits
+geschlossen. Für Allianz und Legion gilt dieselbe Tabelle:
 
-> **`PrerequisiteRole` geht in `DefinitionsHash64` ein**
-> (`hash.WriteUInt8((byte)def.PrerequisiteRole)`). Eine Formatänderung bewegt den
-> Definitions-Hash, und der Relay vergleicht ihn serverseitig. Deshalb liegt
-> dieses Paket **vor** dem VPS-Rollout, nicht danach.
+| Rolle | Fertige eigene Voraussetzungen |
+|---|---|
+| HQ | keine |
+| Kraftwerk | HQ |
+| Raffinerie | keine |
+| Lager | Raffinerie |
+| Kaserne | HQ + Kraftwerk |
+| Fahrzeugfabrik | Raffinerie + Kaserne |
+| Forschungslabor | Fahrzeugfabrik |
+| Radar | Kraftwerk + Kaserne |
+| Verteidigungsplattform | Kraftwerk |
+
+Die Baubar zählt alle aktuell fehlenden Rollen in stabiler Reihenfolge auf.
+Die singuläre Abfrage bleibt für Radar-/Onboarding-Verbraucher erhalten und
+delegiert auf dieselbe Maskenprüfung.
+
+> **`PrerequisiteRoles` geht in `DefinitionsHash64` ein**
+> (`hasPrerequisite u8`, danach `prerequisiteRoles u32`). Die Formatänderung
+> bewegt den Definitions-Hash, und der Relay vergleicht ihn serverseitig.
+> Deshalb müssen Relay und beide Clients aus demselben Commit ausgerollt werden;
+> das Paket liegt **vor** dem VPS-Rollout, nicht danach.
+
+Die ausgelieferte Skirmish-KI plant bislang Raffinerie → Kaserne. Das neue
+Kraftwerk-Tor verlangt den koordinierten, getrennten Handoff im fremden
+`Scripts/AI*`-Schreibbereich; 16.8 wird erst nach dessen grünem Integrationslauf
+gemergt.
 
 ### 16.9 · Platzierungsregeln und Reparaturkosten (C6)
 
@@ -286,7 +309,7 @@ Drei kleine Eingriffe, die zusammengehören, weil sie dasselbe Regelwerk berühr
 
 | Risiko | Umgang |
 |---|---|
-| **Der Relay lehnt nach 16.8 alle Clients ab** | `PrerequisiteRole` bewegt `DefinitionsHash64`, der Relay vergleicht ihn serverseitig. 16.8 liegt **vor** dem VPS-Rollout; danach kostet dieselbe Änderung einen Serverzugang. 16.7 ist davon **nicht** betroffen |
+| **Der Relay lehnt nach 16.8 alle alten Clients ab** | `PrerequisiteRoles` bewegt `DefinitionsHash64`, der Relay vergleicht ihn serverseitig. 16.8 liegt **vor** dem VPS-Rollout; danach kostet dieselbe Änderung einen Serverzugang. 16.7 ist davon **nicht** betroffen |
 | **Vier von fünf Spiegeln der Startaufstellung gepflegt** | roter Test, der wie ein Determinismusfehler aussieht — oder drei Aetherium-Felder ohne sichtbaren Marker. Die fünf Stellen stehen in 16.7 |
 | **Baseline und Verhalten im selben PR** | wird nicht gemergt. `Determinism10000Scenario.cs` liegt ausserhalb der Guard-Präfixe und darf im selben PR nachgezogen werden — `Determinism10000Tests.cs` nicht |
 | **Ein 13B-Merge im selben Fenster** | ein Fenster hat einen Strang (Regelwerk, Merge-Fenster) |
@@ -355,3 +378,4 @@ Die Baseline-Neusetzung ist Zweck der Tests, kein Bruch.
 | Version | Datum | Änderung | Autor |
 |---|---|---|---|
 | 1.0.0 | 2026-08-09 | Erstfassung: Strang C aus Sprint 12 und die acht Betatest-Befunde im selben Schreibbereich zu einem Sprint zusammengeführt, am Code geprüft und nach Kosten sortiert | Orchestrator |
+| 1.2.0 | 2026-08-09 | Paket 16.8 mit D-103 konkretisiert: identische All-of-Kette für beide Fraktionen, fail-closed Maskenvertrag, Definitions-Hash-Folge und KI-Handoff festgeschrieben | Agent (unter Delegation) |
diff --git a/tools/Nova.SimRunner.Tests/ConstructionSystemTests.cs b/tools/Nova.SimRunner.Tests/ConstructionSystemTests.cs
index e1c380a..283d77c 100644
--- a/tools/Nova.SimRunner.Tests/ConstructionSystemTests.cs
+++ b/tools/Nova.SimRunner.Tests/ConstructionSystemTests.cs
@@ -149,6 +149,28 @@ public void Definitions_CoverBothFactions_WithTheDocumentedIdRule()
                 "the Refinery lost its Power-plant prerequisite in both factions (D-077); its draw is unchanged");
             Assert.That(SimDefinitions.TryGetBuilding(FactionId.Legion, UnitRole.Refinery, out SimBuildingDefinition refineryL)
                         && refineryL.PowerRequired == 15 && !refineryL.HasPrerequisite, Is.True);
+
+            var prerequisiteTable = new (UnitRole Role, UnitRoleMask Prerequisites)[]
+            {
+                (UnitRole.HQ, UnitRoleMask.None),
+                (UnitRole.Power, UnitRoleMask.HQ),
+                (UnitRole.Refinery, UnitRoleMask.None),
+                (UnitRole.Storage, UnitRoleMask.Refinery),
+                (UnitRole.Barracks, UnitRoleMask.HQ | UnitRoleMask.Power),
+                (UnitRole.VehicleFactory, UnitRoleMask.Refinery | UnitRoleMask.Barracks),
+                (UnitRole.ResearchLab, UnitRoleMask.VehicleFactory),
+                (UnitRole.Radar, UnitRoleMask.Power | UnitRoleMask.Barracks),
+                (UnitRole.DefensePlatform, UnitRoleMask.Power),
+            };
+            foreach (FactionId faction in new[] { FactionId.Alliance, FactionId.Legion })
+            {
+                foreach ((UnitRole role, UnitRoleMask prerequisites) in prerequisiteTable)
+                {
+                    Assert.That(SimDefinitions.TryGetBuilding(faction, role, out SimBuildingDefinition def), Is.True);
+                    Assert.That(def.PrerequisiteRoles, Is.EqualTo(prerequisites),
+                        $"{faction} {role} prerequisite mask");
+                }
+            }
         }
 
         [Test]
@@ -199,6 +221,8 @@ public void ValidatePlacement_ForeignFactionDefinition_IsRejectedInvalidTarget()
             // Legion one (id 24) — a known id naming unbuildable content is an
             // invalid target, exactly like an unknown one.
             var f = new Fixture(configure: e => e.SetSlotFaction(1, FactionId.Legion));
+            Assert.That(f.Construction.PlaceCompletedBuilding(1, 20, 36, 40).IsValid, Is.True,
+                "Legion HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(1, 22, 40, 40).IsValid, Is.True,
                 "Legion power provider so the power rule does not mask the faction check");
             f.Step(1); // commit the balance
@@ -218,10 +242,11 @@ public void ValidatePlacement_ForeignFactionDefinition_IsRejectedInvalidTarget()
         public void PlaceBuilding_LegionSlot_ChargesLegionCost_AndBuildsFaster()
         {
             var f = new Fixture(configure: e => e.SetSlotFaction(1, FactionId.Legion));
+            Assert.That(f.Construction.PlaceCompletedBuilding(1, 20, 36, 40).IsValid, Is.True, "Legion HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(1, 22, 40, 40).IsValid, Is.True, "Legion power provider");
             f.SpawnBuilder(1, 19, 20);
             f.Step(1); // commit the balance (Legion Power plant provides 80)
-            Assert.That(f.Economy.GetPlayerEconomy(1).PowerProvided, Is.EqualTo(80),
+            Assert.That(f.Economy.GetPlayerEconomy(1).PowerProvided, Is.EqualTo(110),
                 "the power recompute is faction-resolved");
 
             Assert.That(f.Construction.TryPlaceBuilding(1, 24, 20, 20), Is.True, "Legion Barracks def 24");
@@ -255,6 +280,7 @@ private static uint RawOfCompleted(Fixture f, byte slot, UnitRole role)
         public void PlaceBuilding_ChargesExactCost_AndCreatesSiteEntity()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             f.SpawnBuilder(0, 19, 20);
             f.Step(1); // commit the balance (phase-2 recompute)
@@ -297,6 +323,7 @@ public void PlaceBuilding_OccupiedOrOutOfMap_IsRejectedInvalidTarget()
             var f = new Fixture();
             f.SpawnBuilder(0, 19, 20);
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 20, 20).IsValid, Is.True, "Power plant at (20,20)");
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 4, 40, 40).IsValid, Is.True, "Storage prerequisite");
             f.Step(1); // commit the balance
 
             Assert.That(f.Construction.ValidatePlacement(0, 6, 21, 21), Is.EqualTo(CommandResultCode.RejectedInvalidTarget),
@@ -310,16 +337,47 @@ public void PlaceBuilding_OccupiedOrOutOfMap_IsRejectedInvalidTarget()
         }
 
         [Test]
-        public void PlaceBuilding_MissingPrerequisite_IsRejectedPrerequisitesNotMet()
+        public void PlaceBuilding_AllPrerequisitesAreRequired_AndUnknownBitsFailClosed()
         {
             var f = new Fixture();
             f.SpawnBuilder(0, 19, 20);
 
-            Assert.That(f.Construction.ValidatePlacement(0, 11, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet),
-                "a DefensePlatform requires a completed own Power plant");
+            UnitRoleMask barracksPrerequisites = UnitRoleMask.HQ | UnitRoleMask.Power;
+            Assert.That(f.Construction.GetMissingPrerequisiteRoles(0, barracksPrerequisites),
+                Is.EqualTo(barracksPrerequisites));
+            Assert.That(f.Construction.ValidatePlacement(0, 7, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet),
+                "Barracks requires both HQ and Power");
+
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True);
+            Assert.That(f.Construction.GetMissingPrerequisiteRoles(0, barracksPrerequisites),
+                Is.EqualTo(UnitRoleMask.Power), "HQ alone is insufficient");
+            Assert.That(f.Construction.ValidatePlacement(0, 7, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet));
+
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True);
-            f.Step(1); // commit the balance (100 provided)
-            Assert.That(f.Construction.ValidatePlacement(0, 11, 20, 20), Is.EqualTo(CommandResultCode.Applied));
+            Assert.That(f.Construction.GetMissingPrerequisiteRoles(0, barracksPrerequisites), Is.EqualTo(UnitRoleMask.None));
+            Assert.That(f.Construction.HasFinishedBuildings(0, barracksPrerequisites), Is.True);
+            f.Step(1); // commit the balance (130 provided)
+            Assert.That(f.Construction.ValidatePlacement(0, 7, 20, 20), Is.EqualTo(CommandResultCode.Applied));
+
+            var onlyPower = new Fixture();
+            Assert.That(onlyPower.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True);
+            Assert.That(onlyPower.Construction.GetMissingPrerequisiteRoles(0, barracksPrerequisites),
+                Is.EqualTo(UnitRoleMask.HQ), "Power alone is insufficient");
+
+            var foreign = new Fixture();
+            Assert.That(foreign.Construction.PlaceCompletedBuilding(1, 3, 40, 40).IsValid, Is.True);
+            Assert.That(foreign.Construction.GetMissingPrerequisiteRoles(0, UnitRoleMask.HQ),
+                Is.EqualTo(UnitRoleMask.HQ), "a foreign completed building does not satisfy the mask");
+
+            var unfinished = new Fixture(startingCredits: 3000);
+            unfinished.SpawnBuilder(0, 19, 20);
+            Assert.That(unfinished.Construction.TryPlaceBuilding(0, 3, 20, 20), Is.True, "own HQ site");
+            Assert.That(unfinished.Construction.GetMissingPrerequisiteRoles(0, UnitRoleMask.HQ),
+                Is.EqualTo(UnitRoleMask.HQ), "an own unfinished site does not satisfy the mask");
+
+            const UnitRoleMask unknownBit = (UnitRoleMask)(1u << 31);
+            Assert.That(f.Construction.GetMissingPrerequisiteRoles(0, unknownBit), Is.EqualTo(unknownBit));
+            Assert.That(f.Construction.HasFinishedBuildings(0, unknownBit), Is.False, "unknown roles fail closed");
         }
 
         [Test]
@@ -327,15 +385,16 @@ public void PlaceBuilding_PowerRule_RequiresSufficientFreePower()
         {
             var f = new Fixture();
             f.SpawnBuilder(0, 19, 20);
-            // Committed balance: HQ 30 provided, Refinery 20 required -> 10 free.
+            // Committed balance: HQ 30 provided, completed VehicleFactory 25
+            // required -> 5 free. The factory satisfies the ResearchLab's
+            // prerequisite, so only the power gate can reject it.
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 40, 40).IsValid, Is.True);
-            Assert.That(f.Construction.PlaceCompletedBuilding(0, 4, 44, 40).IsValid, Is.True);
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 8, 44, 40).IsValid, Is.True);
             f.Step(1); // let the economy recompute the balance
 
-            Assert.That(f.Construction.ValidatePlacement(0, 8, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet),
-                "VehicleFactory draws 25 but only 10 are free");
-            Assert.That(f.Construction.ValidatePlacement(0, 6, 20, 20), Is.EqualTo(CommandResultCode.Applied),
-                "Storage draws 5 of the 10 free power");
+            Assert.That(f.Construction.HasFinishedBuildings(0, UnitRoleMask.VehicleFactory), Is.True);
+            Assert.That(f.Construction.ValidatePlacement(0, 9, 20, 20), Is.EqualTo(CommandResultCode.RejectedPrerequisitesNotMet),
+                "ResearchLab draws 30 but only 5 are free");
             Assert.That(f.Construction.ValidatePlacement(0, 5, 60, 60), Is.EqualTo(CommandResultCode.Applied),
                 "power-providing buildings are exempt from the rule");
         }
@@ -366,6 +425,7 @@ public void RefineryPlacement_NeedsNoPowerPlant_TheCommandPathEnforcesOnlyThePow
         public void SiteProgress_RequiresBuilderInReach_PausesWhenAway()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             EntityId builder = f.SpawnBuilder(0, 60, 60); // far away
             f.Step(1); // commit the balance
@@ -391,8 +451,10 @@ public void SiteProgress_RequiresBuilderInReach_PausesWhenAway()
         public void SiteProgress_LowPower_ExactlyHalvesProgress()
         {
             var f = new Fixture();
-            // Low power: a completed Refinery draws 20 with nothing provided.
+            // Low power: an HQ provides 30 while two completed Refineries draw 40.
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 48, 40).IsValid, Is.True);
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 4, 40, 40).IsValid, Is.True);
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 4, 44, 40).IsValid, Is.True);
             f.SpawnBuilder(0, 19, 20);
             Assert.That(f.Construction.TryPlaceBuilding(0, 5, 20, 20), Is.True, "Power plant def 5, 150 ticks");
             f.Step(1);
@@ -413,13 +475,14 @@ public void SiteProgress_LowPower_ExactlyHalvesProgress()
             Assert.That(f.Entities.GetUnitRef(UnitCommandStateView.ToEntityId(siteRaw)).Role, Is.EqualTo(UnitRole.Power),
                 "the plant completes after exactly 300 low-power ticks");
             Assert.That(f.Construction.SiteCount, Is.EqualTo(0));
-            Assert.That(f.Construction.BuildingCount, Is.EqualTo(2));
+            Assert.That(f.Construction.BuildingCount, Is.EqualTo(4));
         }
 
         [Test]
         public void Completion_BecomesRoleEntity_PowerAppliesFromNextTick()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 40, 40).IsValid, Is.True, "HQ prerequisite");
             f.SpawnBuilder(0, 19, 20);
             Assert.That(f.Construction.TryPlaceBuilding(0, 5, 20, 20), Is.True);
             uint siteRaw = UnitCommandStateView.ToRawEntityId(SiteEntity(f));
@@ -430,10 +493,10 @@ public void Completion_BecomesRoleEntity_PowerAppliesFromNextTick()
             Assert.That(f.Entities.GetUnitRef(UnitCommandStateView.ToEntityId(siteRaw)).Role, Is.EqualTo(UnitRole.Power));
             Assert.That(f.Entities.GetUnitRef(UnitCommandStateView.ToEntityId(siteRaw)).CurrentHealth, Is.EqualTo(400),
                 "completion restores full HP");
-            Assert.That(f.Economy.GetPlayerEconomy(0).PowerProvided, Is.EqualTo(0),
+            Assert.That(f.Economy.GetPlayerEconomy(0).PowerProvided, Is.EqualTo(30),
                 "the economy ran before construction inside the completion tick");
             f.Step(1);
-            Assert.That(f.Economy.GetPlayerEconomy(0).PowerProvided, Is.EqualTo(100),
+            Assert.That(f.Economy.GetPlayerEconomy(0).PowerProvided, Is.EqualTo(130),
                 "power applies from the next economy recompute on");
         }
 
@@ -442,7 +505,7 @@ public void ResearchLabCompletion_UnlocksT2()
         {
             var f = new Fixture(startingCredits: 3000);
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True); // power
-            Assert.That(f.Construction.PlaceCompletedBuilding(0, 7, 44, 40).IsValid, Is.True); // barracks prerequisite
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 8, 44, 40).IsValid, Is.True); // VehicleFactory prerequisite
             f.SpawnBuilder(0, 19, 20);
             f.Step(1);
 
@@ -634,6 +697,7 @@ public void PlaceCompletedBuilding_Refinery_GrantsNothing_MatchStartIsUnchanged(
         public void CancelConstruction_Refunds75Percent_AndFreesFootprint()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             f.SpawnBuilder(0, 19, 20);
             f.Step(1); // commit the balance
@@ -657,6 +721,7 @@ public void CancelConstruction_Refunds75Percent_AndFreesFootprint()
         public void Sell_CompletedBuilding_Refunds50Percent_SiteIsNotSellable()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             EntityId barracks = f.Construction.PlaceCompletedBuilding(0, 7, 20, 20);
             uint raw = UnitCommandStateView.ToRawEntityId(barracks);
@@ -664,7 +729,7 @@ public void Sell_CompletedBuilding_Refunds50Percent_SiteIsNotSellable()
             Assert.That(f.Construction.SellBuilding(raw), Is.True);
             Assert.That(f.Economy.GetPlayerEconomy(0).AetheriumCredits, Is.EqualTo(1250L),
                 "1000 + 250 (50% floor, provisional)");
-            Assert.That(f.Construction.BuildingCount, Is.EqualTo(1), "only the Barracks was sold");
+            Assert.That(f.Construction.BuildingCount, Is.EqualTo(2), "only the Barracks was sold");
             Assert.That(f.Construction.IsCellFree(20, 20), Is.True);
 
             f.SpawnBuilder(0, 19, 20);
@@ -727,6 +792,7 @@ public void Repair_Validation_RejectsNonBuilder_AndUndamagedTarget()
         public void DestroyedSite_AbortsWithoutRefund_AndFreesFootprint()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             f.SpawnBuilder(0, 19, 20);
             f.Step(1); // commit the balance
@@ -745,12 +811,13 @@ public void DestroyedSite_AbortsWithoutRefund_AndFreesFootprint()
         public void Snapshot_Roundtrip_IsByteIdentical_AndTamperingIsRejected()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 40, 40).IsValid, Is.True, "HQ prerequisite");
             EntityId builder = f.SpawnBuilder(0, 19, 20);
             Assert.That(f.Construction.TryPlaceBuilding(0, 5, 20, 20), Is.True);
             EntityId barracks = f.Construction.PlaceCompletedBuilding(0, 7, 30, 30);
             f.Entities.GetUnitRef(barracks).CurrentHealth = 100;
             f.Construction.AssignRepairOrder(UnitCommandStateView.ToRawEntityId(builder), UnitCommandStateView.ToRawEntityId(barracks));
-            Assert.That(f.Construction.PlaceCompletedBuilding(0, 9, 40, 40).IsValid, Is.True); // T2 flag
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 9, 44, 40).IsValid, Is.True); // T2 flag
             f.Step(10); // accumulate some site progress
 
             var writer = new SnapshotBlockWriter();
@@ -780,6 +847,7 @@ public void Snapshot_Roundtrip_IsByteIdentical_AndTamperingIsRejected()
         public void Snapshot_AssignedBuilderRoleViolation_IsRejectedWithoutMutation()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             f.SpawnBuilder(0, 19, 20);
             EntityId soldier = f.Entities.SpawnUnit(
@@ -817,6 +885,7 @@ public void Snapshot_AssignedBuilderRoleViolation_IsRejectedWithoutMutation()
         public void ProgressSites_ReassignsNonBuilderAssignment_DefenseInDepth()
         {
             var f = new Fixture();
+            Assert.That(f.Construction.PlaceCompletedBuilding(0, 3, 36, 40).IsValid, Is.True, "HQ prerequisite");
             Assert.That(f.Construction.PlaceCompletedBuilding(0, 5, 40, 40).IsValid, Is.True, "power provider");
             EntityId builder = f.SpawnBuilder(0, 19, 20);
             f.Step(1);
diff --git a/tools/Nova.SimRunner.Tests/VictorySystemTests.cs b/tools/Nova.SimRunner.Tests/VictorySystemTests.cs
index 9d546bd..ea05d67 100644
--- a/tools/Nova.SimRunner.Tests/VictorySystemTests.cs
+++ b/tools/Nova.SimRunner.Tests/VictorySystemTests.cs
@@ -31,9 +31,9 @@ public sealed class VictorySystemTests
         private const int Capacity = 64;
         private const ushort MapSize = 64;
 
-        /// <summary>Power plant / Barracks definition ids (SimDefinitions MS-1 table).</summary>
+        /// <summary>Power plant / DefensePlatform definition ids (SimDefinitions MS-1 table).</summary>
         private const ushort DefPower = 5;
-        private const ushort DefBarracks = 7;
+        private const ushort DefDefensePlatform = 11;
 
         /// <summary>
         /// Minimal canonical host: the systems the victory contract actually
@@ -370,13 +370,15 @@ public void ConstructionSite_CountsAsBuilding_AndKeepsTheSideAlive()
         {
             TestHost host = NewHost();
 
-            // Slot 0 gets a real construction site: power provider + builder
-            // + credits are the placement prerequisites.
+            // Slot 0 gets a real DefensePlatform site: power provider + builder
+            // + credits are the placement prerequisites. It deliberately has
+            // no HQ, so D-077's separate last-HQ defeat trigger cannot mask
+            // the D-056 site-counting behavior under test.
             EntityId power = host.Construction.PlaceCompletedBuilding(0, DefPower, 40, 40);
             Assert.That(power.IsValid, Is.True, "power provider");
             EntityId builder = host.SpawnUnit(0, 19, 20, UnitRole.Builder);
             host.Step(1);
-            Assert.That(host.Construction.TryPlaceBuilding(0, DefBarracks, 20, 20), Is.True, "Barracks site");
+            Assert.That(host.Construction.TryPlaceBuilding(0, DefDefensePlatform, 20, 20), Is.True, "DefensePlatform site");
             Assert.That(host.Construction.SiteCount, Is.EqualTo(1));
 
             // Slot 1 is the opponent that keeps the match two-sided.
diff --git a/tools/Nova.SimRunner.Tests/WeaponValuesTests.cs b/tools/Nova.SimRunner.Tests/WeaponValuesTests.cs
index 9514b51..b586643 100644
--- a/tools/Nova.SimRunner.Tests/WeaponValuesTests.cs
+++ b/tools/Nova.SimRunner.Tests/WeaponValuesTests.cs
@@ -232,6 +232,23 @@ public void DefinitionsHash64_IsStable_CoversBothFactions_AndIsNotAStub()
                 "the last Legion unit row is covered");
         }
 
+        [Test]
+        public void DefinitionsHash64_ChangesWhenPrerequisiteMaskChanges()
+        {
+            ulong canonical = SimDefinitions.ComputeDefinitionsHash64();
+            var buildings = SimDefinitions.AllBuildings.ToArray();
+            SimBuildingDefinition source = buildings[0];
+            buildings[0] = new SimBuildingDefinition(
+                source.DefinitionId, source.Faction, source.Role,
+                source.CostAE, source.BuildTicks, source.PowerProvided, source.PowerRequired,
+                source.PrerequisiteRoles | UnitRoleMask.Power, source.MaxHealth,
+                source.ArmorClass, source.DamageType, source.AttackDamage,
+                source.AttackRangeTiles, source.AttackCooldownTicks);
+
+            Assert.That(SimDefinitions.ComputeDefinitionsHash64(buildings, SimDefinitions.AllUnits),
+                Is.Not.EqualTo(canonical), "all-of prerequisite bits are fingerprint-covered");
+        }
+
         [Test]
         public void DefinitionsHash64_ChangesWhenAnyWeaponValueChanges()
         {
@@ -264,7 +281,7 @@ public void DefinitionsHash64_ChangesWhenAnyWeaponValueChanges()
                     buildings[i] = new SimBuildingDefinition(
                         buildings[i].DefinitionId, buildings[i].Faction, buildings[i].Role,
                         buildings[i].CostAE, buildings[i].BuildTicks, buildings[i].PowerProvided, buildings[i].PowerRequired,
-                        buildings[i].HasPrerequisite, buildings[i].PrerequisiteRole, buildings[i].MaxHealth,
+                        buildings[i].PrerequisiteRoles, buildings[i].MaxHealth,
                         buildings[i].ArmorClass, buildings[i].DamageType,
                         attackDamage: buildings[i].AttackDamage + 1, buildings[i].AttackRangeTiles, buildings[i].AttackCooldownTicks);
                 }
@@ -280,7 +297,7 @@ private static ulong HashWithMutatedBuilding(int index)
                 buildings[index].DefinitionId, buildings[index].Faction, buildings[index].Role,
                 costAE: buildings[index].CostAE + 1, buildings[index].BuildTicks,
                 buildings[index].PowerProvided, buildings[index].PowerRequired,
-                buildings[index].HasPrerequisite, buildings[index].PrerequisiteRole, buildings[index].MaxHealth,
+                buildings[index].PrerequisiteRoles, buildings[index].MaxHealth,
                 buildings[index].ArmorClass, buildings[index].DamageType,
                 buildings[index].AttackDamage, buildings[index].AttackRangeTiles, buildings[index].AttackCooldownTicks);
             return SimDefinitions.ComputeDefinitionsHash64(buildings, SimDefinitions.AllUnits);