diff --git a/UXAssist/Common/GameConstants/DysonSphereConstants.cs b/UXAssist/Common/GameConstants/DysonSphereConstants.cs
new file mode 100644
index 0000000..ebae0b1
--- /dev/null
+++ b/UXAssist/Common/GameConstants/DysonSphereConstants.cs
@@ -0,0 +1,49 @@
+namespace UXAssist.Common.GameConstants;
+
+/// <summary>
+/// Geometric and pool constants used by Dyson Sphere helper functions.
+/// </summary>
+public static class DysonSphereConstants
+{
+    /* Angle conversion. */
+    public const float RadiansToDegrees = 57.2957802f;
+
+    /* Default capacity for newly reset Dyson sphere layer pools. */
+    public const int DefaultLayerPoolCapacity = 64;
+
+    /* Maximum allowed vertices for a custom Dyson shell. */
+    public const int MaxShellVertices = 32767;
+
+    /* Minimum vertex count used as a quality guard in quick shell creation. */
+    public const int MinShellVertexThreshold = 32000;
+
+    /* Maximum orbit radius supported by precalculated shell triangles (m). */
+    public const int MaxOrbitRadius = 250000;
+
+    /* Minimum radius considered when searching for a free layer radius. */
+    public const int MinOrbitRadiusSearch = 4000;
+
+    /* Layer radius decrement step when looking for a free slot. */
+    public const int OrbitRadiusSearchStep = 10;
+
+    /* Base grid size used for shell vertex tessellation. */
+    public const float GridSizeBase = 80f;
+
+    /* Base radius used to derive shell grid scale (gridScale ~ (radius / base)^0.75). */
+    public const double GridScaleBaseRadius = 4000.0;
+
+    /* Cell point cost per vertex (cpPerVertex = gridScale^2 * 2). */
+    public const int CpPerVertexFactor = 2;
+
+    /* Number of candidate node positions around the orbit for max-output shell search. */
+    public const int MaxShellSearchNodeCount = 60;
+
+    /* Maximum triangle combinations evaluated in brute-force shell search. */
+    public const int MaxShellSearchCombinations = 60 * 59 * 58;
+
+    /* Seed multiplier for shell randomization. */
+    public const int ShellRandSeedMultiplier = 10000;
+
+    /* int.MaxValue, used as a total-cp ceiling before forcing new nodes. */
+    public const int TotalCpMaxCeiling = int.MaxValue;
+}
diff --git a/UXAssist/Common/GameConstants/ItemIds.cs b/UXAssist/Common/GameConstants/ItemIds.cs
new file mode 100644
index 0000000..ad4c2af
--- /dev/null
+++ b/UXAssist/Common/GameConstants/ItemIds.cs
@@ -0,0 +1,120 @@
+using System.Collections.Generic;
+
+namespace UXAssist.Common.GameConstants;
+
+/// <summary>
+/// Hard-coded item IDs used across factory and logistics patches.
+/// </summary>
+public static class ItemIds
+{
+    /* Ores and basic resources */
+    public const int Water = 1000;
+    public const int Coal = 1006;
+    public const int SulfuricAcid = 1116;
+    public const int Hydrogen = 1120;
+    public const int Deuterium = 1121;
+    public const int Photon = 1208;
+
+    /* Materials used by recipes */
+    public const int OrganicCrystal = 1015;
+    public const int FireIce = 1012;
+    public const int CriticalPhoton = 1124;
+    public const int CircuitBoard = 1112; // used in proliferator mk.III recipe
+    public const int Steel = 1107;
+    public const int TitaniumGlass = 1111;
+    public const int GravitonLens = 1125;
+
+    /* Proliferators */
+    public const int ProliferatorMkI = 1141;
+    public const int ProliferatorMkII = 1142;
+    public const int ProliferatorMkIII = 1143;
+
+    /* Logistics carriers */
+    public const int SpaceWarper = 1126;
+
+    /* Matrices */
+    public const int ElectromagneticMatrix = 1202;
+    public const int EnergyMatrix = 1203;
+    public const int StructureMatrix = 1204;
+    public const int InformationMatrix = 1205;
+    public const int UniverseMatrix = 1209;
+    public const int Antimatter = 1210;
+
+    /* Components */
+    public const int PlasmaExciter = 1301;
+    public const int ParticleBroadband = 1305;
+    public const int Processor = 1401;
+    public const int QuantumChip = 1402;
+    public const int MicrocrystallineComponent = 1403;
+    public const int PlaneFilter = 1405;
+    public const int ParticleContainer = 1406;
+
+    /* Dyson sphere materials */
+    public const int SolarSail = 1502;
+    public const int FrameMaterial = 1503;
+    public const int DysonSphereComponent = 1802;
+
+    /* Power generators */
+    public const int WindTurbine = 2203;
+
+    /* Dark Fog items (combat expansion) */
+    public const int DarkFogMemoryUnit = 5201;
+    public const int DarkFogEnergyFragment = 5202;
+    public const int DarkFogSiliconNeuron = 5203;
+    public const int DarkFogNegentropySingularity = 5204;
+    public const int DarkFogMatterReassembler = 5205;
+    public const int DarkFogVirtualParticle = 5206;
+
+    /* Fuel and advanced items */
+    public const int HydrogenFuelRod = 6001;
+    public const int DeuteronFuelRod = 6002;
+    public const int AntimatterFuelRod = 6003;
+    public const int StrangeMatter = 6004;
+    public const int Foundation = 6005;
+    public const int Metaverse = 6006; // also called property/meta-data item
+
+    /* Item groups used by belt signal recipe calculations. */
+    public static readonly int[] ExtraOreItemIds =
+    [
+        Water, SulfuricAcid, Hydrogen, Deuterium, Photon,
+        DarkFogMemoryUnit, DarkFogEnergyFragment, DarkFogSiliconNeuron,
+        DarkFogNegentropySingularity, DarkFogMatterReassembler, DarkFogVirtualParticle
+    ];
+
+    public static readonly HashSet<int> ExtraProliferationItemIds =
+    [
+        Steel, TitaniumGlass, GravitonLens, ProliferatorMkII, ProliferatorMkIII,
+        ElectromagneticMatrix, EnergyMatrix, StructureMatrix, InformationMatrix,
+        UniverseMatrix, Antimatter, PlasmaExciter, ParticleBroadband,
+        Processor, QuantumChip, MicrocrystallineComponent, PlaneFilter, ParticleContainer,
+        SolarSail, FrameMaterial, DysonSphereComponent,
+        HydrogenFuelRod, AntimatterFuelRod, StrangeMatter, Foundation, Metaverse
+    ];
+
+    public static readonly HashSet<int> NoProliferationItemIds =
+    [
+        SpaceWarper, DeuteronFuelRod
+    ];
+
+    /// <summary>
+    /// All source items used to create 25 proliferators mk.III (not self-sprayed).
+    /// </summary>
+    public static readonly List<(int ItemId, float Count)> ProliferatorSources =
+    [
+        (OrganicCrystal, 60f),
+        (CriticalPhoton, 20f),
+        (Coal, 64f),
+        (FireIce, 16f),
+        (CircuitBoard, 32f),
+        (ProliferatorMkI, 64f),
+        (ProliferatorMkII, 40f),
+        (ProliferatorMkIII, 25f)
+    ];
+
+    /* Aliases used by UXAssist belt signal buy-out logic. */
+    public static readonly int[] DarkFogItemIds =
+    [
+        DarkFogMemoryUnit, DarkFogVirtualParticle, DarkFogEnergyFragment,
+        DarkFogNegentropySingularity, DarkFogSiliconNeuron, DarkFogMatterReassembler
+    ];
+}
diff --git a/UXAssist/Common/GameConstants/LogisticsConstants.cs b/UXAssist/Common/GameConstants/LogisticsConstants.cs
new file mode 100644
index 0000000..8f1e1da
--- /dev/null
+++ b/UXAssist/Common/GameConstants/LogisticsConstants.cs
@@ -0,0 +1,52 @@
+namespace UXAssist.Common.GameConstants;
+
+/// <summary>
+/// Constants used by logistics capacity and station UI patches.
+/// </summary>
+public static class LogisticsConstants
+{
+    /* Default base storage capacity used by the real-time logistics panel. */
+    public const int DefaultLocalStorageMax = 5000;
+    public const int DefaultRemoteStorageMax = 10000;
+
+    /* Maximum storage when overflow-in-logistics is enabled. */
+    public const int OverflowStorageMax = 90000000;
+
+    /* Station storage slot limits. */
+    public const int DefaultStorageSlotCount = 5;
+
+    /* Key-repeat timing for keyboard-based max adjustment (in game ticks). */
+    public const long KeyRepeatInitialDelay = 30;
+    public const long KeyRepeatInterval = 4;
+
+    /* Keyboard adjustment deltas for storage max values. */
+    public const int SmallAdjustment = 10;
+    public const int MediumAdjustment = 100;
+    public const int LargeAdjustment = 1000;
+    public const int HugeAdjustment = 10000;
+    public const int MassiveAdjustment = 100000;
+    public const int GargantuanAdjustment = 1000000;
+
+    /* Rounding divisors used when scaling storage on tech unlock. */
+    public const int LocalStorageRounding = 50;
+    public const int RemoteStorageRounding = 100;
+
+    /* Charge power slider scaling factors. */
+    public const long ChargePowerSliderScale = 50000L;
+    public const long ChargePowerSliderMinScale = 500000L;
+
+    /* Mining speed slider ranges. */
+    public const int MinMiningSpeedBase = 10000;
+    public const int MaxMiningSpeedBase = 30000;
+    public const int MiningSpeedFineStep = 1000;
+    public const int MiningSpeedCoarseStep = 10000;
+    public const float MiningSpeedSliderMaxDefault = 20f;
+    public const float MiningSpeedSliderMaxExtended = 27f;
+
+    /* Dispenser / battle base charge power multiplier. */
+    public const double DispenserChargePowerMultiplier = 5000.0;
+
+    /* Real-time logistics panel UI dimensions. */
+    public const float StorageSliderWidth = 70f;
+    public const float StorageSliderHeight = 5f;
+}
diff --git a/UXAssist/Common/GameConstants/TechIds.cs b/UXAssist/Common/GameConstants/TechIds.cs
new file mode 100644
index 0000000..2ef4232
--- /dev/null
+++ b/UXAssist/Common/GameConstants/TechIds.cs
@@ -0,0 +1,72 @@
+using System.Collections.Generic;
+
+namespace UXAssist.Common.GameConstants;
+
+/// <summary>
+/// Hard-coded technology IDs used across tech patches.
+/// </summary>
+public static class TechIds
+{
+    /// <summary>
+    /// Base game tech for "Sorter Cargo Stacking" upgrades.
+    /// </summary>
+    public const int SorterCargoStacking = 3608;
+
+    /* Custom sorter cargo stacking techs used by UXAssist (repositioned clones). */
+    public const int SorterCargoStackingCustomStart = 3301;
+    public const int SorterCargoStackingCustomEnd = 3306;
+
+    /* Combat-related tech ranges disabled in peace mode. */
+    public static readonly HashSet<int> CombatTechs = CreateCombatTechs();
+
+    private static HashSet<int> CreateCombatTechs()
+    {
+        (int Start, int End)[] ranges =
+        [
+            // Explosive Unit, Crystal Explosive Unit
+            (1803, 1804),
+            // Implosion Cannon
+            (1807, 1807),
+            // Signal Tower, Planetary Defense System, Jammer Tower, Plasma Turret,
+            // ammo boxes, shell/missile sets, capsules, drones, corvettes, destroyers, suppressing/EM capsules
+            (1809, 1825),
+            // Auto Reconstruction Marking
+            (2951, 2956),
+            // Energy Shield
+            (2801, 2807),
+            // Kinetic Weapon Damage
+            (5001, 5006),
+            // Energy Weapon Damage
+            (5101, 5106),
+            // Explosive Weapon Damage
+            (5201, 5206),
+            // Combat Drone Damage
+            (5301, 5305),
+            // Combat Drone Attack Speed
+            (5401, 5405),
+            // Combat Drone Engine
+            (5601, 5605),
+            // Combat Drone Durability
+            (5701, 5705),
+            // Ground Squadron Expansion
+            (5801, 5807),
+            // Space Fleet Expansion
+            (5901, 5907),
+            // Enhanced Structure
+            (6001, 6006),
+            // Planetary Shield
+            (6101, 6106)
+        ];
+
+        var set = new HashSet<int>();
+        foreach (var (start, end) in ranges)
+        {
+            for (var id = start; id <= end; id++)
+            {
+                set.Add(id);
+            }
+        }
+
+        return set;
+    }
+}
diff --git a/UXAssist/Common/GameConstants/UniverseGenConstants.cs b/UXAssist/Common/GameConstants/UniverseGenConstants.cs
new file mode 100644
index 0000000..90ae339
--- /dev/null
+++ b/UXAssist/Common/GameConstants/UniverseGenConstants.cs
@@ -0,0 +1,52 @@
+namespace UXAssist.Common.GameConstants;
+
+/// <summary>
+/// Galaxy generation defaults, slider limits and UI constants.
+/// </summary>
+public static class UniverseGenConstants
+{
+    /* Default algorithm parameters for galaxy generation. */
+    public const double DefaultMinDist = 2.0;
+    public const double DefaultMinStep = 2.0;
+    public const double DefaultMaxStep = 3.2;
+    public const double DefaultFlatten = 0.18;
+
+    /* Vanilla game limits replaced by UniverseGenTweaks. */
+    public const int VanillaMaxStarCount = 80;
+    public const int VanillaGalaxyCapacity = 25700;
+    public const int VanillaSectorCapacity = 25600;
+
+    /* Expanded capacities used by UniverseGenTweaks. */
+    public const int ExpandedGalaxyCapacity = 102500;
+    public const int ExpandedSectorCapacity = 102500;
+
+    /* Maximum star count settings. */
+    public const int MinStarCount = 32;
+    public const int MaxStarCount = 1024;
+    public const int DefaultMaxStarCount = 128;
+    public const float StarCountSliderMin = 64f;
+    public const float StarCountSliderMax = 1024f;
+    public const int StarCountAlignmentMask = 7; // round up to multiple of 8
+
+    /* UIGalaxySelect custom slider limits (slider value = parameter * StepSliderScale). */
+    public const float StepSliderScale = 10f;
+
+    public const float MinDistSliderMin = 10f;
+    public const float MinDistSliderMax = 50f;
+
+    public const float MaxStepSliderMax = 100f;
+
+    public const float FlattenSliderMin = 1f;
+    public const float FlattenSliderMax = 50f;
+    public const double FlattenSliderScale = 50.0;
+
+    /* Vertical spacing between added slider rows in the galaxy select UI. */
+    public const float SliderRowSpacing = -36f;
+
+    /* Epic difficulty resource multiplier slider. */
+    public const float ResourceMultiplierSliderMax = 11f;
+
+    /* Oil multiplier thresholds used by Epic difficulty. */
+    public const float OilMultiplierThreshold = 0.05f;
+    public const float OilMultiplierBase = 0.5f;
+}