NEO-150: Add issue-time contract economy validation

Introduce ContractEconomyValidation.TryValidateTemplate and wire it
into TryIssue before persist with economy_cap_exceeded and
invalid_reward_bundle deny codes.

server/NeonSprawl.Server.Tests/Game/Contracts/ContractCompletionOperationsIntegrationTests.cs

@@ -32,6 +32,10 @@ public sealed class ContractCompletionOperationsIntegrationTests
             SeedBucket,
             zoneDifficultyBand: null,
             deps.TemplateRegistry,
+            deps.EncounterRegistry,
+            deps.ItemRegistry,
+            deps.SkillRegistry,
+            deps.FactionRegistry,
             deps.InstanceStore,
             deps.StandingStore,
             deps.TimeProvider);
@@ -123,6 +127,7 @@ public sealed class ContractCompletionOperationsIntegrationTests
             services.GetRequiredService<IContractInstanceStore>(),
             services.GetRequiredService<IContractOutcomeStore>(),
             services.GetRequiredService<IEncounterDefinitionRegistry>(),
+            services.GetRequiredService<IFactionDefinitionRegistry>(),
             services.GetRequiredService<IRewardTableDefinitionRegistry>(),
             services.GetRequiredService<IEncounterProgressStore>(),
             services.GetRequiredService<IEncounterCompletionStore>(),
@@ -147,6 +152,7 @@ public sealed class ContractCompletionOperationsIntegrationTests
         IContractInstanceStore InstanceStore,
         IContractOutcomeStore OutcomeStore,
         IEncounterDefinitionRegistry EncounterRegistry,
+        IFactionDefinitionRegistry FactionRegistry,
         IRewardTableDefinitionRegistry RewardTableRegistry,
         IEncounterProgressStore ProgressStore,
         IEncounterCompletionStore CompletionStore,

server/NeonSprawl.Server.Tests/Game/Contracts/ContractCompletionOperationsTests.cs

@@ -1,4 +1,5 @@
 using NeonSprawl.Server.Game.Contracts;
+using NeonSprawl.Server.Game.Encounters;
 using NeonSprawl.Server.Game.Factions;
 using NeonSprawl.Server.Game.Items;
 using NeonSprawl.Server.Game.Mastery;
@@ -165,6 +166,10 @@ public sealed class ContractCompletionOperationsTests
             SeedBucket,
             zoneDifficultyBand: null,
             deps.TemplateRegistry,
+            deps.EncounterRegistry,
+            deps.ItemRegistry,
+            deps.SkillRegistry,
+            deps.FactionRegistry,
             deps.InstanceStore,
             deps.StandingStore,
             deps.TimeProvider);
@@ -226,6 +231,8 @@ public sealed class ContractCompletionOperationsTests
             services.GetRequiredService<IContractTemplateRegistry>(),
             services.GetRequiredService<IContractInstanceStore>(),
             services.GetRequiredService<IContractOutcomeStore>(),
+            services.GetRequiredService<IEncounterDefinitionRegistry>(),
+            services.GetRequiredService<IFactionDefinitionRegistry>(),
             services.GetRequiredService<IItemDefinitionRegistry>(),
             services.GetRequiredService<IPlayerInventoryStore>(),
             services.GetRequiredService<ISkillDefinitionRegistry>(),
@@ -248,6 +255,8 @@ public sealed class ContractCompletionOperationsTests
         IContractTemplateRegistry TemplateRegistry,
         IContractInstanceStore InstanceStore,
         IContractOutcomeStore OutcomeStore,
+        IEncounterDefinitionRegistry EncounterRegistry,
+        IFactionDefinitionRegistry FactionRegistry,
         IItemDefinitionRegistry ItemRegistry,
         IPlayerInventoryStore InventoryStore,
         ISkillDefinitionRegistry SkillRegistry,

server/NeonSprawl.Server.Tests/Game/Contracts/ContractEconomyValidationTests.cs

@@ -0,0 +1,140 @@
+using NeonSprawl.Server.Game.Contracts;
+using NeonSprawl.Server.Game.Encounters;
+using NeonSprawl.Server.Game.Factions;
+using NeonSprawl.Server.Game.Items;
+using NeonSprawl.Server.Game.Quests;
+using NeonSprawl.Server.Game.Skills;
+
+namespace NeonSprawl.Server.Tests.Game.Contracts;
+
+public sealed class ContractEconomyValidationTests
+{
+    private const string TemplateId = "prototype_contract_clear_combat_pocket";
+    private const string EncounterId = "prototype_combat_pocket";
+    private const string GridOperatorsFactionId = "prototype_faction_grid_operators";
+
+    [Fact]
+    public void TryValidateTemplate_ShouldReturnTrue_WhenPrototypeFreezeRowAtCaps()
+    {
+        // Arrange
+        var template = PrototypeE7M4ContractCatalogRules.ExpectedTemplateFreeze[TemplateId];
+        var registries = CreatePrototypeRegistries();
+        // Act
+        var ok = ContractEconomyValidation.TryValidateTemplate(
+            template,
+            registries.EncounterRegistry,
+            registries.ItemRegistry,
+            registries.SkillRegistry,
+            registries.FactionRegistry,
+            out var reasonCode);
+        // Assert
+        Assert.True(ok);
+        Assert.Null(reasonCode);
+    }
+
+    [Fact]
+    public void TryValidateTemplate_ShouldDenyEconomyCapExceeded_WhenItemQuantityOverBandCap()
+    {
+        // Arrange
+        var prototype = PrototypeE7M4ContractCatalogRules.ExpectedTemplateFreeze[TemplateId];
+        var overCapTemplate = prototype with
+        {
+            CompletionRewardBundle = new QuestRewardBundleRow(
+                [new RewardGrantRow("scrap_metal_bulk", 11)],
+                prototype.CompletionRewardBundle.SkillXpGrants,
+                prototype.CompletionRewardBundle.ReputationGrants),
+        };
+        var registries = CreatePrototypeRegistries();
+        // Act
+        var ok = ContractEconomyValidation.TryValidateTemplate(
+            overCapTemplate,
+            registries.EncounterRegistry,
+            registries.ItemRegistry,
+            registries.SkillRegistry,
+            registries.FactionRegistry,
+            out var reasonCode);
+        // Assert
+        Assert.False(ok);
+        Assert.Equal(ContractGeneratorReasonCodes.EconomyCapExceeded, reasonCode);
+    }
+
+    [Fact]
+    public void TryValidateTemplate_ShouldDenyInvalidRewardBundle_WhenItemIdUnknown()
+    {
+        // Arrange
+        var prototype = PrototypeE7M4ContractCatalogRules.ExpectedTemplateFreeze[TemplateId];
+        var unknownItemTemplate = prototype with
+        {
+            CompletionRewardBundle = new QuestRewardBundleRow(
+                [new RewardGrantRow("unknown_item_xyz", 1)],
+                prototype.CompletionRewardBundle.SkillXpGrants,
+                prototype.CompletionRewardBundle.ReputationGrants),
+        };
+        var registries = CreatePrototypeRegistries();
+        // Act
+        var ok = ContractEconomyValidation.TryValidateTemplate(
+            unknownItemTemplate,
+            registries.EncounterRegistry,
+            registries.ItemRegistry,
+            registries.SkillRegistry,
+            registries.FactionRegistry,
+            out var reasonCode);
+        // Assert
+        Assert.False(ok);
+        Assert.Equal(ContractGeneratorReasonCodes.InvalidRewardBundle, reasonCode);
+    }
+
+    private static CatalogRegistries CreatePrototypeRegistries()
+    {
+        var encounterRows = new Dictionary<string, EncounterDefRow>(StringComparer.Ordinal)
+        {
+            [EncounterId] = new(
+                EncounterId,
+                "Prototype Combat Pocket",
+                "defeat_all_targets",
+                ["prototype_npc_melee", "prototype_npc_ranged", "prototype_npc_elite"],
+                "prototype_combat_pocket_clear"),
+        };
+        var encounterRegistry = new EncounterDefinitionRegistry(
+            new EncounterDefinitionCatalog("/tmp/encounters", encounterRows, catalogJsonFileCount: 1));
+
+        var itemRows = new Dictionary<string, ItemDefRow>(StringComparer.Ordinal)
+        {
+            ["scrap_metal_bulk"] = new(
+                "scrap_metal_bulk",
+                "Scrap Metal (Bulk)",
+                "material",
+                StackMax: 999,
+                InventorySlotKind: "bag",
+                Rarity: null,
+                BindPolicy: null,
+                DurabilityMax: null),
+        };
+        var itemRegistry = new ItemDefinitionRegistry(
+            new ItemDefinitionCatalog("/tmp/items", itemRows, catalogJsonFileCount: 1));
+
+        var skillRows = new Dictionary<string, SkillDefRow>(StringComparer.Ordinal)
+        {
+            ["salvage"] = new("salvage", "gather", "Salvage", ["activity", "mission_reward"]),
+            ["refine"] = new("refine", "process", "Refine", ["activity", "mission_reward", "trainer"]),
+            ["intrusion"] = new("intrusion", "tech", "Intrusion", ["activity", "mission_reward", "book_or_item"]),
+        };
+        var skillRegistry = new SkillDefinitionRegistry(
+            new SkillDefinitionCatalog("/tmp/skills", skillRows, catalogJsonFileCount: 1));
+
+        var factionRows = new Dictionary<string, FactionDefRow>(StringComparer.Ordinal)
+        {
+            [GridOperatorsFactionId] = PrototypeE7M3FactionCatalogRules.ExpectedFactionFreeze[GridOperatorsFactionId],
+        };
+        var factionRegistry = new FactionDefinitionRegistry(
+            new FactionDefinitionCatalog("/tmp/factions", factionRows, catalogJsonFileCount: 1));
+
+        return new CatalogRegistries(encounterRegistry, itemRegistry, skillRegistry, factionRegistry);
+    }
+
+    private sealed record CatalogRegistries(
+        IEncounterDefinitionRegistry EncounterRegistry,
+        IItemDefinitionRegistry ItemRegistry,
+        ISkillDefinitionRegistry SkillRegistry,
+        IFactionDefinitionRegistry FactionRegistry);
+}

server/NeonSprawl.Server.Tests/Game/Contracts/ContractGeneratorOperationsIntegrationTests.cs

@@ -1,5 +1,8 @@
 using NeonSprawl.Server.Game.Contracts;
+using NeonSprawl.Server.Game.Encounters;
 using NeonSprawl.Server.Game.Factions;
+using NeonSprawl.Server.Game.Items;
+using NeonSprawl.Server.Game.Skills;
 
 namespace NeonSprawl.Server.Tests.Game.Contracts;
 
@@ -27,12 +30,20 @@ public sealed class ContractGeneratorOperationsIntegrationTests
             TemplateId,
             SeedBucket);
         // Act
+        var encounterRegistry = scope.ServiceProvider.GetRequiredService<IEncounterDefinitionRegistry>();
+        var itemRegistry = scope.ServiceProvider.GetRequiredService<IItemDefinitionRegistry>();
+        var skillRegistry = scope.ServiceProvider.GetRequiredService<ISkillDefinitionRegistry>();
+        var factionRegistry = scope.ServiceProvider.GetRequiredService<IFactionDefinitionRegistry>();
         var result = ContractGeneratorOperations.TryIssue(
             PlayerId,
             TemplateId,
             SeedBucket,
             zoneDifficultyBand: null,
             templateRegistry,
+            encounterRegistry,
+            itemRegistry,
+            skillRegistry,
+            factionRegistry,
             instanceStore,
             standingStore,
             timeProvider);

server/NeonSprawl.Server.Tests/Game/Contracts/ContractGeneratorOperationsTests.cs

@@ -1,7 +1,10 @@
 using NeonSprawl.Server.Game.Contracts;
+using NeonSprawl.Server.Game.Encounters;
 using NeonSprawl.Server.Game.Factions;
+using NeonSprawl.Server.Game.Items;
 using NeonSprawl.Server.Game.PositionState;
 using NeonSprawl.Server.Game.Quests;
+using NeonSprawl.Server.Game.Skills;
 
 namespace NeonSprawl.Server.Tests.Game.Contracts;
 
@@ -206,6 +209,10 @@ public sealed class ContractGeneratorOperationsTests
             SeedBucket,
             zoneDifficultyBand: null,
             templateRegistry,
+            deps.EncounterRegistry,
+            deps.ItemRegistry,
+            deps.SkillRegistry,
+            deps.FactionRegistry,
             store,
             standingStore,
             deps.TimeProvider);
@@ -252,6 +259,50 @@ public sealed class ContractGeneratorOperationsTests
         Assert.Equal(ContractGeneratorReasonCodes.InvalidIds, result.ReasonCode);
     }
 
+    [Fact]
+    public void TryIssue_ShouldDenyEconomyCapExceeded_WhenItemQuantityOverBandCap()
+    {
+        // Arrange
+        var prototype = PrototypeE7M4ContractCatalogRules.ExpectedTemplateFreeze[TemplateId];
+        var overCapTemplate = prototype with
+        {
+            CompletionRewardBundle = new QuestRewardBundleRow(
+                [new RewardGrantRow("scrap_metal_bulk", 11)],
+                prototype.CompletionRewardBundle.SkillXpGrants,
+                prototype.CompletionRewardBundle.ReputationGrants),
+        };
+        var deps = CreateDependencies(overCapTemplate);
+        // Act
+        var result = TryIssue(deps, templateId: TemplateId, seedBucket: SeedBucket);
+        // Assert
+        Assert.False(result.Success);
+        Assert.Equal(ContractGeneratorReasonCodes.EconomyCapExceeded, result.ReasonCode);
+        Assert.Null(result.Snapshot);
+        Assert.False(deps.InstanceStore.TryGetActiveForPlayer(PlayerId, out _));
+    }
+
+    [Fact]
+    public void TryIssue_ShouldDenyInvalidRewardBundle_WhenItemIdUnknown()
+    {
+        // Arrange
+        var prototype = PrototypeE7M4ContractCatalogRules.ExpectedTemplateFreeze[TemplateId];
+        var unknownItemTemplate = prototype with
+        {
+            CompletionRewardBundle = new QuestRewardBundleRow(
+                [new RewardGrantRow("unknown_item_xyz", 1)],
+                prototype.CompletionRewardBundle.SkillXpGrants,
+                prototype.CompletionRewardBundle.ReputationGrants),
+        };
+        var deps = CreateDependencies(unknownItemTemplate);
+        // Act
+        var result = TryIssue(deps, templateId: TemplateId, seedBucket: SeedBucket);
+        // Assert
+        Assert.False(result.Success);
+        Assert.Equal(ContractGeneratorReasonCodes.InvalidRewardBundle, result.ReasonCode);
+        Assert.Null(result.Snapshot);
+        Assert.False(deps.InstanceStore.TryGetActiveForPlayer(PlayerId, out _));
+    }
+
     private static ContractIssueOperationResult TryIssue(
         GeneratorTestDependencies deps,
         string? playerId = PlayerId,
@@ -264,6 +315,10 @@ public sealed class ContractGeneratorOperationsTests
             seedBucket,
             zoneDifficultyBand,
             deps.TemplateRegistry,
+            deps.EncounterRegistry,
+            deps.ItemRegistry,
+            deps.SkillRegistry,
+            deps.FactionRegistry,
             deps.InstanceStore,
             deps.StandingStore,
             deps.TimeProvider);
@@ -281,13 +336,66 @@ public sealed class ContractGeneratorOperationsTests
         var positionOptions = Options.Create(new GamePositionOptions { DevPlayerId = PlayerId });
         var instanceStore = new InMemoryContractInstanceStore(positionOptions);
         var standingStore = CreateStandingStore();
+        var catalogRegistries = CreatePrototypeCatalogRegistries();
         return new GeneratorTestDependencies(
             templateRegistry,
+            catalogRegistries.EncounterRegistry,
+            catalogRegistries.ItemRegistry,
+            catalogRegistries.SkillRegistry,
+            catalogRegistries.FactionRegistry,
             instanceStore,
             standingStore,
             new FakeTimeProvider(IssuedAt));
     }
 
+    private static CatalogRegistries CreatePrototypeCatalogRegistries()
+    {
+        var encounterRows = new Dictionary<string, EncounterDefRow>(StringComparer.Ordinal)
+        {
+            [EncounterId] = new(
+                EncounterId,
+                "Prototype Combat Pocket",
+                "defeat_all_targets",
+                ["prototype_npc_melee", "prototype_npc_ranged", "prototype_npc_elite"],
+                "prototype_combat_pocket_clear"),
+        };
+        var encounterRegistry = new EncounterDefinitionRegistry(
+            new EncounterDefinitionCatalog("/tmp/encounters", encounterRows, catalogJsonFileCount: 1));
+
+        var itemRows = new Dictionary<string, ItemDefRow>(StringComparer.Ordinal)
+        {
+            ["scrap_metal_bulk"] = new(
+                "scrap_metal_bulk",
+                "Scrap Metal (Bulk)",
+                "material",
+                StackMax: 999,
+                InventorySlotKind: "bag",
+                Rarity: null,
+                BindPolicy: null,
+                DurabilityMax: null),
+        };
+        var itemRegistry = new ItemDefinitionRegistry(
+            new ItemDefinitionCatalog("/tmp/items", itemRows, catalogJsonFileCount: 1));
+
+        var skillRows = new Dictionary<string, SkillDefRow>(StringComparer.Ordinal)
+        {
+            ["salvage"] = new("salvage", "gather", "Salvage", ["activity", "mission_reward"]),
+            ["refine"] = new("refine", "process", "Refine", ["activity", "mission_reward", "trainer"]),
+            ["intrusion"] = new("intrusion", "tech", "Intrusion", ["activity", "mission_reward", "book_or_item"]),
+        };
+        var skillRegistry = new SkillDefinitionRegistry(
+            new SkillDefinitionCatalog("/tmp/skills", skillRows, catalogJsonFileCount: 1));
+
+        var factionRows = new Dictionary<string, FactionDefRow>(StringComparer.Ordinal)
+        {
+            [GridOperatorsFactionId] = PrototypeE7M3FactionCatalogRules.ExpectedFactionFreeze[GridOperatorsFactionId],
+        };
+        var factionRegistry = new FactionDefinitionRegistry(
+            new FactionDefinitionCatalog("/tmp/factions", factionRows, catalogJsonFileCount: 1));
+
+        return new CatalogRegistries(encounterRegistry, itemRegistry, skillRegistry, factionRegistry);
+    }
+
     private static InMemoryFactionStandingStore CreateStandingStore()
     {
         var byId = new Dictionary<string, FactionDefRow>(StringComparer.Ordinal)
@@ -307,10 +415,20 @@ public sealed class ContractGeneratorOperationsTests
 
     private readonly record struct GeneratorTestDependencies(
         IContractTemplateRegistry TemplateRegistry,
+        IEncounterDefinitionRegistry EncounterRegistry,
+        IItemDefinitionRegistry ItemRegistry,
+        ISkillDefinitionRegistry SkillRegistry,
+        IFactionDefinitionRegistry FactionRegistry,
         IContractInstanceStore InstanceStore,
         IFactionStandingStore StandingStore,
         TimeProvider TimeProvider);
 
+    private sealed record CatalogRegistries(
+        IEncounterDefinitionRegistry EncounterRegistry,
+        IItemDefinitionRegistry ItemRegistry,
+        ISkillDefinitionRegistry SkillRegistry,
+        IFactionDefinitionRegistry FactionRegistry);
+
     /// <summary>Simulates store create failure without populating the out snapshot (Bugbot regression).</summary>
     private sealed class CreateActiveNullSnapshotStore(IContractInstanceStore inner) : IContractInstanceStore
     {

server/NeonSprawl.Server.Tests/Game/Contracts/ContractGeneratorPersistenceIntegrationTests.cs

@@ -1,5 +1,8 @@
 using NeonSprawl.Server.Game.Contracts;
+using NeonSprawl.Server.Game.Encounters;
 using NeonSprawl.Server.Game.Factions;
+using NeonSprawl.Server.Game.Items;
+using NeonSprawl.Server.Game.Skills;
 using NeonSprawl.Server.Game.PositionState;
 using NeonSprawl.Server.Tests.Game.PositionState;
 
@@ -36,6 +39,10 @@ public sealed class ContractGeneratorPersistenceIntegrationTests(PostgresIntegra
                 SeedBucket,
                 zoneDifficultyBand: null,
                 services.GetRequiredService<IContractTemplateRegistry>(),
+                services.GetRequiredService<IEncounterDefinitionRegistry>(),
+                services.GetRequiredService<IItemDefinitionRegistry>(),
+                services.GetRequiredService<ISkillDefinitionRegistry>(),
+                services.GetRequiredService<IFactionDefinitionRegistry>(),
                 services.GetRequiredService<IContractInstanceStore>(),
                 services.GetRequiredService<IFactionStandingStore>(),
                 services.GetRequiredService<TimeProvider>());

server/NeonSprawl.Server.Tests/Game/Encounters/EncounterCompletionOperationsTests.cs

@@ -28,6 +28,10 @@ public sealed class EncounterCompletionOperationsTests
             "2026-06-22",
             zoneDifficultyBand: null,
             deps.ContractTemplateRegistry,
+            deps.EncounterRegistry,
+            deps.ItemRegistry,
+            deps.SkillRegistry,
+            deps.FactionRegistry,
             deps.ContractInstanceStore,
             deps.StandingStore,
             TimeProvider.System);
@@ -513,7 +517,8 @@ public sealed class EncounterCompletionOperationsTests
             services.GetRequiredService<IReputationDeltaStore>(),
             services.GetRequiredService<IContractInstanceStore>(),
             services.GetRequiredService<IContractOutcomeStore>(),
-            services.GetRequiredService<IContractTemplateRegistry>());
+            services.GetRequiredService<IContractTemplateRegistry>(),
+            services.GetRequiredService<IFactionDefinitionRegistry>());
     }
 
     private static int CountBagItem(PlayerInventorySnapshot snapshot, string itemId)
@@ -564,7 +569,8 @@ public sealed class EncounterCompletionOperationsTests
         IReputationDeltaStore AuditStore,
         IContractInstanceStore ContractInstanceStore,
         IContractOutcomeStore ContractOutcomeStore,
-        IContractTemplateRegistry ContractTemplateRegistry);
+        IContractTemplateRegistry ContractTemplateRegistry,
+        IFactionDefinitionRegistry FactionRegistry);
 
     private sealed class CompletionStoreDeniesMark(IEncounterCompletionStore inner) : IEncounterCompletionStore
     {

server/NeonSprawl.Server.Tests/Game/Quests/QuestFixtureApiTests.cs

@@ -1,5 +1,6 @@
 using Microsoft.AspNetCore.Hosting;
 using NeonSprawl.Server.Game.Contracts;
+using NeonSprawl.Server.Game.Encounters;
 using NeonSprawl.Server.Game.Factions;
 using NeonSprawl.Server.Game.Items;
 using NeonSprawl.Server.Game.Mastery;
@@ -291,12 +292,18 @@ public sealed class QuestFixtureApiTests
         var timeProvider = factory.Services.GetRequiredService<TimeProvider>();
         const string templateId = "prototype_contract_clear_combat_pocket";
         const string encounterId = "prototype_combat_pocket";
+        var encounterRegistry = factory.Services.GetRequiredService<IEncounterDefinitionRegistry>();
+        var factionRegistry = factory.Services.GetRequiredService<IFactionDefinitionRegistry>();
         var issued = ContractGeneratorOperations.TryIssue(
             DevPlayer,
             templateId,
             "2026-06-22",
             zoneDifficultyBand: null,
             templateRegistry,
+            encounterRegistry,
+            itemRegistry,
+            skillRegistry,
+            factionRegistry,
             instanceStore,
             standingStore,
             timeProvider);

server/NeonSprawl.Server/Game/Contracts/ContractEconomyValidation.cs

@@ -0,0 +1,63 @@
+using NeonSprawl.Server.Game.Encounters;
+using NeonSprawl.Server.Game.Factions;
+using NeonSprawl.Server.Game.Items;
+using NeonSprawl.Server.Game.Skills;
+
+namespace NeonSprawl.Server.Game.Contracts;
+
+/// <summary>
+/// Issue-time economy and reward-bundle validation for contract templates (NEO-150).
+/// Mirrors startup catalog gates for defense in depth at <see cref="ContractGeneratorOperations.TryIssue"/>.
+/// </summary>
+public static class ContractEconomyValidation
+{
+    /// <summary>
+    /// Validates band caps and cross-refs for one template against live registries.
+    /// </summary>
+    public static bool TryValidateTemplate(
+        ContractTemplateRow template,
+        IEncounterDefinitionRegistry encounterRegistry,
+        IItemDefinitionRegistry itemRegistry,
+        ISkillDefinitionRegistry skillRegistry,
+        IFactionDefinitionRegistry factionRegistry,
+        out string? reasonCode)
+    {
+        ArgumentNullException.ThrowIfNull(encounterRegistry);
+        ArgumentNullException.ThrowIfNull(itemRegistry);
+        ArgumentNullException.ThrowIfNull(skillRegistry);
+        ArgumentNullException.ThrowIfNull(factionRegistry);
+
+        reasonCode = null;
+        var rowsById = new Dictionary<string, ContractTemplateRow>(StringComparer.Ordinal)
+        {
+            [template.Id] = template,
+        };
+
+        if (PrototypeE7M4ContractCatalogRules.TryGetBandCapGateError(rowsById) is not null)
+        {
+            reasonCode = ContractGeneratorReasonCodes.EconomyCapExceeded;
+            return false;
+        }
+
+        var knownEncounterIds = encounterRegistry.GetDefinitionsInIdOrder()
+            .Select(static d => d.Id)
+            .ToHashSet(StringComparer.Ordinal);
+        var knownFactionIds = factionRegistry.GetDefinitionsInIdOrder()
+            .Select(static d => d.Id)
+            .ToHashSet(StringComparer.Ordinal);
+        var skillDefsById = skillRegistry.GetDefinitionsInIdOrder()
+            .ToDictionary(static d => d.Id, StringComparer.Ordinal);
+
+        if (PrototypeE7M4ContractCatalogRules.TryGetCrossRefError(
+                rowsById,
+                knownEncounterIds,
+                knownFactionIds,
+                skillDefsById) is not null)
+        {
+            reasonCode = ContractGeneratorReasonCodes.InvalidRewardBundle;
+            return false;
+        }
+
+        return true;
+    }
+}

server/NeonSprawl.Server/Game/Contracts/ContractGeneratorOperations.cs

@@ -1,10 +1,13 @@
+using NeonSprawl.Server.Game.Encounters;
 using NeonSprawl.Server.Game.Factions;
+using NeonSprawl.Server.Game.Items;
+using NeonSprawl.Server.Game.Skills;
 
 namespace NeonSprawl.Server.Game.Contracts;
 
 /// <summary>
 /// Server-authoritative contract issuance from template catalog + seed inputs (NEO-147).
-/// HTTP: E7M4-08 (NEO-151). Telemetry hook sites: E7M4-09 (NEO-152).
+/// HTTP: E7M4-08 (NEO-151). Economy validation: E7M4-07 (NEO-150). Telemetry hook sites: E7M4-09 (NEO-152).
 /// </summary>
 public static class ContractGeneratorOperations
 {
@@ -17,6 +20,10 @@ public static class ContractGeneratorOperations
         string seedBucket,
         int? zoneDifficultyBand,
         IContractTemplateRegistry templateRegistry,
+        IEncounterDefinitionRegistry encounterRegistry,
+        IItemDefinitionRegistry itemRegistry,
+        ISkillDefinitionRegistry skillRegistry,
+        IFactionDefinitionRegistry factionRegistry,
         IContractInstanceStore instanceStore,
         IFactionStandingStore standingStore,
         TimeProvider timeProvider)
@@ -52,6 +59,17 @@ public static class ContractGeneratorOperations
             return Deny(denyReason!);
         }
 
+        if (!ContractEconomyValidation.TryValidateTemplate(
+                template!,
+                encounterRegistry,
+                itemRegistry,
+                skillRegistry,
+                factionRegistry,
+                out var economyReason))
+        {
+            return Deny(economyReason!);
+        }
+
         var instanceId = ContractInstanceIds.MakeDeterministicInstanceId(
             normalizedPlayerId,
             template!.Id,

server/NeonSprawl.Server/Game/Contracts/ContractGeneratorReasonCodes.cs

@@ -12,4 +12,8 @@ public static class ContractGeneratorReasonCodes
     public const string NoEligibleTemplate = "no_eligible_template";
 
     public const string UnknownTemplate = "unknown_template";
+
+    public const string EconomyCapExceeded = "economy_cap_exceeded";
+
+    public const string InvalidRewardBundle = "invalid_reward_bundle";
 }