CC Package and Physics

2026-06-02 08:56:26 -07:00
parent a5af81c8a8
commit 2ee30c01fd
37 changed files with 1295 additions and 142 deletions
@@ -0,0 +1,6 @@
 {
  "version": "1.0",
  "components": [
    "Microsoft.VisualStudio.Workload.ManagedGame"
  ]
 }
@@ -14,6 +14,8 @@ GameObject:
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  - component: {fileID: 304484164735584996}
  - component: {fileID: 1666753161128106451}
  - component: {fileID: 3388430386408803303}
  - component: {fileID: 2040450355011915060}
  m_Layer: 0
  m_Name: Player
  m_TagString: Untagged
@@ -147,3 +149,66 @@ MonoBehaviour:
  Importance: 1
  MaxSendRate: 0
  prefabId: 
 --- !u!136 &3388430386408803303
 CapsuleCollider:
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  m_IncludeLayers:
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 --- !u!114 &2040450355011915060
 MonoBehaviour:
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  m_Name: 
  m_EditorClassIdentifier: ProjectM.Authoring::ProjectM.Authoring.PlayerCharacterAuthoring
  GroundedMovementSharpness: 15
  CharacterProperties:
    CustomPhysicsBodyTags:
      Tag00: 0
      Tag01: 0
      Tag02: 0
      Tag03: 0
      Tag04: 0
      Tag05: 0
      Tag06: 0
      Tag07: 0
    InterpolatePosition: 1
    InterpolateRotation: 0
    EvaluateGrounding: 1
    SnapToGround: 1
    GroundSnappingDistance: 0.5
    EnhancedGroundPrecision: 0
    MaxGroundedSlopeAngle: 60
    DetectMovementCollisions: 1
    DecollideFromOverlaps: 1
    ProjectVelocityOnInitialOverlaps: 0
    MaxContinuousCollisionsIterations: 8
    MaxOverlapDecollisionIterations: 2
    DiscardMovementWhenExceedMaxIterations: 1
    KillVelocityWhenExceedMaxIterations: 1
    DetectObstructionsForParentBodyMovement: 0
    SimulateDynamicBody: 1
    Mass: 1
@@ -0,0 +1,56 @@
 using ProjectM.Simulation;
 using Unity.CharacterController;
 using Unity.Entities;
 using UnityEngine;
 namespace ProjectM.Authoring
 {
    /// <summary>
    /// Authoring for the kinematic-character half of the player ghost (M5b: Unity Character Controller). Added
    /// to the SAME prefab GameObject as <c>PlayerAuthoring</c> + the GhostAuthoringComponent (multiple bakers
    /// per GameObject is supported; both resolve the same Entity). The baker calls
    /// <see cref="KinematicCharacterUtilities.BakeCharacter"/>, which adds the CC runtime components/buffers
    /// (KinematicCharacterProperties, KinematicCharacterBody, StoredKinematicCharacterData, the four CC
    /// buffers, kinematic PhysicsVelocity/PhysicsMass, PhysicsGravityFactor, CharacterInterpolation) and bakes
    /// the GameObject's CapsuleCollider into a PhysicsCollider. We then add our
    /// <see cref="CharacterComponent"/> + <see cref="CharacterControl"/>.
    /// <para>
    /// IMPORTANT: BakeCharacter aborts (logs an error, adds nothing) if the GameObject has a Rigidbody and
    /// requires uniform (1,1,1) scale — so the M5 Rigidbody MUST be removed from the prefab (the M5
    /// CapsuleCollider stays — it is what gets baked into the character's PhysicsCollider).
    /// </para>
    /// </summary>
    [DisallowMultipleComponent]
    public class PlayerCharacterAuthoring : MonoBehaviour
    {
        [Tooltip("Sharpness of ground velocity smoothing (higher = snappier).")]
        public float GroundedMovementSharpness = 15f;
        public AuthoringKinematicCharacterProperties CharacterProperties = AuthoringKinematicCharacterProperties.GetDefault();
        private class PlayerCharacterBaker : Baker<PlayerCharacterAuthoring>
        {
            public override void Bake(PlayerCharacterAuthoring authoring)
            {
                // Top-down planar character: no gravity (handled in the processor), stay on the plane.
                var props = authoring.CharacterProperties;
                props.SnapToGround = false;       // no floor entity to snap to; planar
                props.EvaluateGrounding = true;   // floor/obstacle contact still reads as grounded
                props.InterpolatePosition = true; // smooth fixed-step position for presentation
                props.InterpolateRotation = false; // rotation owned by PlayerAimSystem
                props.SimulateDynamicBody = false; // players don't physically shove each other (keep simple)
                KinematicCharacterUtilities.BakeCharacter(this, authoring.gameObject, props);
                var entity = GetEntity(TransformUsageFlags.Dynamic | TransformUsageFlags.WorldSpace);
                AddComponent(entity, new CharacterComponent
                {
                    GroundedMovementSharpness = authoring.GroundedMovementSharpness,
                    StepAndSlopeHandling = BasicStepAndSlopeHandlingParameters.GetDefault(),
                });
                AddComponent(entity, new CharacterControl());
            }
        }
    }
 }
@@ -0,0 +1,2 @@
 fileFormatVersion: 2
 guid: e344ebd143cbf68439540a537e6ba4e9
@@ -7,7 +7,9 @@
        "Unity.Entities.Hybrid",
        "Unity.Collections",
        "Unity.Mathematics",
-        "Unity.NetCode"
+        "Unity.NetCode",
        "Unity.Physics",
        "Unity.CharacterController"
    ],
    "includePlatforms": [],
    "excludePlatforms": [],
@@ -10,7 +10,7 @@ namespace ProjectM.Simulation
    /// AbilityRef / CharacterStatsRef) with its replicated StatModifier buffer into the
    /// EffectiveAbilityStats / EffectiveCharacterStats components - every predicted tick, on both worlds.
    ///
-    /// Runs at the head of the predicted group (UpdateBefore PlayerAimSystem and PlayerMoveSystem;
+    /// Runs at the head of the predicted group (UpdateBefore PlayerAimSystem;
    /// AbilityFireSystem runs after PlayerAimSystem, so it sees fresh values too). Recompute is
    /// unconditional every tick: it is a pure function of (blob base + replicated buffer), both of which
    /// are restored on rollback, so predicted and server results always agree. A dirty-flag / change
@@ -19,7 +19,6 @@ namespace ProjectM.Simulation
    /// </summary>
    [UpdateInGroup(typeof(PredictedSimulationSystemGroup))]
    [UpdateBefore(typeof(PlayerAimSystem))]
    [UpdateBefore(typeof(PlayerMoveSystem))]
    [BurstCompile]
    public partial struct StatRecomputeSystem : ISystem
    {
@@ -0,0 +1,48 @@
 using System;
 using Unity.CharacterController;
 using Unity.Entities;
 using Unity.Mathematics;
 namespace ProjectM.Simulation
 {
    /// <summary>
    /// Tunables for the top-down kinematic character (M5b: Unity Character Controller package). Twin-stick /
    /// planar: NO jump, NO air control, NO gravity, NO view pitch. The per-tick target speed comes from the
    /// data-driven <see cref="EffectiveCharacterStats.MoveSpeed"/> via <see cref="PlayerControlSystem"/>; this
    /// component only carries the smoothing sharpness + step/slope handling the CC processor needs. Authored
    /// on the player prefab by <c>PlayerCharacterAuthoring</c>. Not a ghost — movement replicates through the
    /// owner-predicted LocalTransform (re-simulated on the owner, interpolated on remotes).
    /// </summary>
    [Serializable]
    public struct CharacterComponent : IComponentData
    {
        /// <summary>How quickly RelativeVelocity is lerped toward the target velocity on the ground.</summary>
        public float GroundedMovementSharpness;
        /// <summary>Step/slope handling params (defaults; planar ground so mostly inert).</summary>
        public BasicStepAndSlopeHandlingParameters StepAndSlopeHandling;
        public static CharacterComponent GetDefault()
        {
            return new CharacterComponent
            {
                GroundedMovementSharpness = 15f,
                StepAndSlopeHandling = BasicStepAndSlopeHandlingParameters.GetDefault(),
            };
        }
    }
    /// <summary>
    /// Per-tick, NON-replicated control for the CC processor, derived each predicted tick from the replicated
    /// <see cref="PlayerInput"/> by <see cref="PlayerControlSystem"/>. Derived (not authored, not a ghost): a
    /// pure function of replicated input + recomputed stats, so it reproduces identically on server, owning
    /// client, and across rollback re-simulation.
    /// </summary>
    [Serializable]
    public struct CharacterControl : IComponentData
    {
        /// <summary>World-space desired velocity (already scaled by MoveSpeed, Y == 0). The processor lerps
        /// RelativeVelocity toward this each tick.</summary>
        public float3 MoveVelocity;
    }
 }
@@ -0,0 +1,2 @@
 fileFormatVersion: 2
 guid: 69a9d5a5573f2804d987602849f43554
@@ -0,0 +1,24 @@
 using Unity.Mathematics;
 namespace ProjectM.Simulation
 {
    /// <summary>
    /// Pure, Burst-friendly math for top-down character control, factored out for EditMode unit testing
    /// (no World/system needed). Maps a twin-stick move axis + speed to a planar world velocity.
    /// </summary>
    public static class CharacterControlMath
    {
        /// <summary>
        /// Twin-stick move (x,y) on the XZ plane scaled by <paramref name="speed"/>. Input longer than unit
        /// length is clamped (so diagonals aren't faster than cardinals); shorter is left proportional
        /// (analog sticks). Returns a world velocity with Y == 0.
        /// </summary>
        public static float3 DesiredMovement(float2 move, float speed)
        {
            float lenSq = math.lengthsq(move);
            if (lenSq > 1f)
                move = math.normalize(move);
            return new float3(move.x, 0f, move.y) * speed;
        }
    }
 }
@@ -0,0 +1,2 @@
 fileFormatVersion: 2
 guid: 8ada5ffb04316ba48851d44f5b3340f2
@@ -0,0 +1,35 @@
 using System.Collections.Generic;
 using Unity.CharacterController;
 using Unity.Entities;
 using Unity.NetCode;
 namespace ProjectM.Simulation
 {
    /// <summary>
    /// Ghost-variant registration for the kinematic character (M5b). <see cref="CharacterInterpolation"/> is
    /// presentation-only fixed-step smoothing that must exist ONLY on predicted clients: on the server it
    /// would interfere with LocalToWorld, and on interpolated remote ghosts it would double up with netcode's
    /// own snapshot interpolation. <c>BakeCharacter</c> adds it to every prefab version, so we force it
    /// predicted-client-only here.
    /// <para>
    /// We deliberately do NOT override the default variants for <c>LocalTransform</c> or
    /// <c>PhysicsVelocity</c> (the CC sample's DontSerializeVariant on LocalTransform is global and would
    /// break the non-character ghosts in this project — projectiles, dummies, pickups — which rely on stock
    /// LocalTransform replication). The character's position therefore replicates via the normal
    /// owner-predicted LocalTransform path, like every other ghost.
    /// </para>
    /// </summary>
    public sealed partial class CharacterGhostVariantsSystem : DefaultVariantSystemBase
    {
        protected override void RegisterDefaultVariants(Dictionary<ComponentType, Rule> defaultVariants)
        {
            defaultVariants.Add(typeof(CharacterInterpolation), Rule.ForAll(typeof(CharacterInterpolation_GhostVariant)));
        }
    }
    [GhostComponentVariation(typeof(CharacterInterpolation))]
    [GhostComponent(PrefabType = GhostPrefabType.PredictedClient)]
    public struct CharacterInterpolation_GhostVariant
    {
    }
 }
@@ -0,0 +1,2 @@
 fileFormatVersion: 2
 guid: 6383b28a0d1f44649b514ece99ee4915
@@ -0,0 +1,104 @@
 using Unity.Burst;
 using Unity.Burst.Intrinsics;
 using Unity.CharacterController;
 using Unity.Entities;
 using Unity.Physics;
 using Unity.Transforms;
 namespace ProjectM.Simulation
 {
    /// <summary>
    /// Fixed-step kinematic character update. Runs in <see cref="KinematicCharacterPhysicsUpdateGroup"/>
    /// (which sits after the physics build); under Netcode-for-Entities the physics groups are relocated into
    /// <see cref="Unity.NetCode.PredictedFixedStepSimulationSystemGroup"/>, so the character integrates inside
    /// the predicted loop — deterministic, rollback-safe, identical on server + owning client. Builds a
    /// <see cref="KinematicCharacterDataAccess"/> per entity and runs the processor's PhysicsUpdate. Filtered
    /// to <see cref="Simulate"/> so only predicted ghosts step.
    /// </summary>
    [UpdateInGroup(typeof(KinematicCharacterPhysicsUpdateGroup))]
    [BurstCompile]
    public partial struct CharacterPhysicsUpdateSystem : ISystem
    {
        EntityQuery m_CharacterQuery;
        CharacterUpdateContext m_Context;
        KinematicCharacterUpdateContext m_BaseContext;
        [BurstCompile]
        public void OnCreate(ref SystemState state)
        {
            m_CharacterQuery = KinematicCharacterUtilities.GetBaseCharacterQueryBuilder()
                .WithAll<CharacterComponent, CharacterControl>()
                .Build(ref state);
            m_Context = new CharacterUpdateContext();
            m_Context.OnSystemCreate(ref state);
            m_BaseContext = new KinematicCharacterUpdateContext();
            m_BaseContext.OnSystemCreate(ref state);
            state.RequireForUpdate(m_CharacterQuery);
            state.RequireForUpdate<PhysicsWorldSingleton>();
        }
        [BurstCompile]
        public void OnUpdate(ref SystemState state)
        {
            m_Context.OnSystemUpdate(ref state);
            m_BaseContext.OnSystemUpdate(ref state, SystemAPI.Time, SystemAPI.GetSingleton<PhysicsWorldSingleton>());
            var job = new CharacterPhysicsUpdateJob
            {
                Context = m_Context,
                BaseContext = m_BaseContext,
            };
            state.Dependency = job.Schedule(state.Dependency);
        }
        [BurstCompile]
        [WithAll(typeof(Simulate))]
        public partial struct CharacterPhysicsUpdateJob : IJobEntity, IJobEntityChunkBeginEnd
        {
            public CharacterUpdateContext Context;
            public KinematicCharacterUpdateContext BaseContext;
            void Execute(
                Entity entity,
                RefRW<LocalTransform> localTransform,
                RefRW<KinematicCharacterProperties> characterProperties,
                RefRW<KinematicCharacterBody> characterBody,
                RefRW<PhysicsCollider> physicsCollider,
                RefRW<CharacterComponent> characterComponent,
                RefRW<CharacterControl> characterControl,
                DynamicBuffer<KinematicCharacterHit> characterHitsBuffer,
                DynamicBuffer<StatefulKinematicCharacterHit> statefulHitsBuffer,
                DynamicBuffer<KinematicCharacterDeferredImpulse> deferredImpulsesBuffer,
                DynamicBuffer<KinematicVelocityProjectionHit> velocityProjectionHits)
            {
                var processor = new CharacterProcessor
                {
                    CharacterDataAccess = new KinematicCharacterDataAccess(
                        entity,
                        localTransform,
                        characterProperties,
                        characterBody,
                        physicsCollider,
                        characterHitsBuffer,
                        statefulHitsBuffer,
                        deferredImpulsesBuffer,
                        velocityProjectionHits),
                    CharacterComponent = characterComponent,
                    CharacterControl = characterControl,
                };
                processor.PhysicsUpdate(ref Context, ref BaseContext);
            }
            public bool OnChunkBegin(in ArchetypeChunk chunk, int unfilteredChunkIndex, bool useEnabledMask, in v128 chunkEnabledMask)
            {
                BaseContext.EnsureCreationOfTmpCollections();
                return true;
            }
            public void OnChunkEnd(in ArchetypeChunk chunk, int unfilteredChunkIndex, bool useEnabledMask, in v128 chunkEnabledMask, bool chunkWasExecuted) { }
        }
    }
 }
@@ -0,0 +1,2 @@
 fileFormatVersion: 2
 guid: 70d14da3eeeaec24896586d71fd22fdc
@@ -0,0 +1,213 @@
 using Unity.CharacterController;
 using Unity.Entities;
 using Unity.Mathematics;
 using Unity.Physics;
 namespace ProjectM.Simulation
 {
    /// <summary>
    /// Per-update "global" data the character processor needs (lookups, singletons). Empty for the minimal
    /// top-down character — kept so the CC update signature is satisfied and future lookups have a home.
    /// </summary>
    public struct CharacterUpdateContext
    {
        public void OnSystemCreate(ref SystemState state) { }
        public void OnSystemUpdate(ref SystemState state) { }
    }
    /// <summary>
    /// Top-down kinematic character processor (CC 1.4.2 pattern: <see cref="IKinematicCharacterProcessor{T}"/>
    /// + a <see cref="KinematicCharacterDataAccess"/> built in the job, driving the static
    /// <see cref="KinematicCharacterUtilities"/> Update_* sequence). Stripped of all FPS features: no jump,
    /// no air movement, no gravity, no view. <see cref="PhysicsUpdate"/> runs the canonical CC update
    /// sequence; <see cref="HandleVelocityControl"/> lerps RelativeVelocity toward the desired planar
    /// velocity <see cref="PlayerControlSystem"/> wrote. Rotation/facing is owned by <see cref="PlayerAimSystem"/>.
    /// </summary>
    public struct CharacterProcessor : IKinematicCharacterProcessor<CharacterUpdateContext>
    {
        public KinematicCharacterDataAccess CharacterDataAccess;
        public RefRW<CharacterComponent> CharacterComponent;
        public RefRW<CharacterControl> CharacterControl;
        public void PhysicsUpdate(ref CharacterUpdateContext context, ref KinematicCharacterUpdateContext baseContext)
        {
            ref CharacterComponent characterComponent = ref CharacterComponent.ValueRW;
            ref KinematicCharacterBody characterBody = ref CharacterDataAccess.CharacterBody.ValueRW;
            ref float3 characterPosition = ref CharacterDataAccess.LocalTransform.ValueRW.Position;
            KinematicCharacterUtilities.Update_Initialize(
                in this, ref context, ref baseContext,
                ref characterBody,
                CharacterDataAccess.CharacterHitsBuffer,
                CharacterDataAccess.DeferredImpulsesBuffer,
                CharacterDataAccess.VelocityProjectionHits,
                baseContext.Time.DeltaTime);
            KinematicCharacterUtilities.Update_ParentMovement(
                in this, ref context, ref baseContext,
                CharacterDataAccess.CharacterEntity,
                ref characterBody,
                CharacterDataAccess.CharacterProperties.ValueRO,
                CharacterDataAccess.PhysicsCollider.ValueRO,
                CharacterDataAccess.LocalTransform.ValueRO,
                ref characterPosition,
                characterBody.WasGroundedBeforeCharacterUpdate);
            KinematicCharacterUtilities.Update_Grounding(
                in this, ref context, ref baseContext,
                ref characterBody,
                CharacterDataAccess.CharacterEntity,
                CharacterDataAccess.CharacterProperties.ValueRO,
                CharacterDataAccess.PhysicsCollider.ValueRO,
                CharacterDataAccess.LocalTransform.ValueRO,
                CharacterDataAccess.VelocityProjectionHits,
                CharacterDataAccess.CharacterHitsBuffer,
                ref characterPosition);
            HandleVelocityControl(ref context, ref baseContext);
            KinematicCharacterUtilities.Update_PreventGroundingFromFutureSlopeChange(
                in this, ref context, ref baseContext,
                CharacterDataAccess.CharacterEntity,
                ref characterBody,
                CharacterDataAccess.CharacterProperties.ValueRO,
                CharacterDataAccess.PhysicsCollider.ValueRO,
                in characterComponent.StepAndSlopeHandling);
            KinematicCharacterUtilities.Update_GroundPushing(
                in this, ref context, ref baseContext,
                ref characterBody,
                CharacterDataAccess.CharacterProperties.ValueRO,
                CharacterDataAccess.LocalTransform.ValueRO,
                CharacterDataAccess.DeferredImpulsesBuffer,
                float3.zero);
            KinematicCharacterUtilities.Update_MovementAndDecollisions(
                in this, ref context, ref baseContext,
                CharacterDataAccess.CharacterEntity,
                ref characterBody,
                CharacterDataAccess.CharacterProperties.ValueRO,
                CharacterDataAccess.PhysicsCollider.ValueRO,
                CharacterDataAccess.LocalTransform.ValueRO,
                CharacterDataAccess.VelocityProjectionHits,
                CharacterDataAccess.CharacterHitsBuffer,
                CharacterDataAccess.DeferredImpulsesBuffer,
                ref characterPosition);
            KinematicCharacterUtilities.Update_MovingPlatformDetection(ref baseContext, ref characterBody);
            KinematicCharacterUtilities.Update_ParentMomentum(ref baseContext, ref characterBody,
                CharacterDataAccess.LocalTransform.ValueRO.Position);
            KinematicCharacterUtilities.Update_ProcessStatefulCharacterHits(
                CharacterDataAccess.CharacterHitsBuffer,
                CharacterDataAccess.StatefulHitsBuffer);
        }
        void HandleVelocityControl(ref CharacterUpdateContext context, ref KinematicCharacterUpdateContext baseContext)
        {
            float deltaTime = baseContext.Time.DeltaTime;
            ref KinematicCharacterBody characterBody = ref CharacterDataAccess.CharacterBody.ValueRW;
            ref CharacterComponent characterComponent = ref CharacterComponent.ValueRW;
            CharacterControl characterControl = CharacterControl.ValueRO;
            // Planar twin-stick: smoothly approach the desired world velocity (already speed-scaled, Y==0).
            float3 targetVelocity = characterControl.MoveVelocity;
            CharacterControlUtilities.StandardGroundMove_Interpolated(
                ref characterBody.RelativeVelocity,
                targetVelocity,
                characterComponent.GroundedMovementSharpness,
                deltaTime,
                math.up(),
                math.up());
        }
        public void VariableUpdate(ref CharacterUpdateContext context, ref KinematicCharacterUpdateContext baseContext) { }
        public void UpdateGroundingUp(ref CharacterUpdateContext context, ref KinematicCharacterUpdateContext baseContext)
        {
            ref KinematicCharacterBody characterBody = ref CharacterDataAccess.CharacterBody.ValueRW;
            KinematicCharacterUtilities.Default_UpdateGroundingUp(
                ref characterBody,
                CharacterDataAccess.LocalTransform.ValueRO.Rotation);
        }
        public bool CanCollideWithHit(ref CharacterUpdateContext context, ref KinematicCharacterUpdateContext baseContext, in BasicHit hit)
        {
            return PhysicsUtilities.IsCollidable(hit.Material);
        }
        public bool IsGroundedOnHit(ref CharacterUpdateContext context, ref KinematicCharacterUpdateContext baseContext, in BasicHit hit, int groundingEvaluationType)
        {
            CharacterComponent characterComponent = CharacterComponent.ValueRO;
            return KinematicCharacterUtilities.Default_IsGroundedOnHit(
                in this, ref context, ref baseContext,
                CharacterDataAccess.CharacterEntity,
                CharacterDataAccess.PhysicsCollider.ValueRO,
                CharacterDataAccess.CharacterBody.ValueRO,
                CharacterDataAccess.CharacterProperties.ValueRO,
                in hit,
                in characterComponent.StepAndSlopeHandling,
                groundingEvaluationType);
        }
        public void OnMovementHit(
            ref CharacterUpdateContext context,
            ref KinematicCharacterUpdateContext baseContext,
            ref KinematicCharacterHit hit,
            ref float3 remainingMovementDirection,
            ref float remainingMovementLength,
            float3 originalVelocityDirection,
            float hitDistance)
        {
            ref KinematicCharacterBody characterBody = ref CharacterDataAccess.CharacterBody.ValueRW;
            ref float3 characterPosition = ref CharacterDataAccess.LocalTransform.ValueRW.Position;
            CharacterComponent characterComponent = CharacterComponent.ValueRO;
            KinematicCharacterUtilities.Default_OnMovementHit(
                in this, ref context, ref baseContext,
                ref characterBody,
                CharacterDataAccess.CharacterEntity,
                CharacterDataAccess.CharacterProperties.ValueRO,
                CharacterDataAccess.PhysicsCollider.ValueRO,
                CharacterDataAccess.LocalTransform.ValueRO,
                ref characterPosition,
                CharacterDataAccess.VelocityProjectionHits,
                ref hit,
                ref remainingMovementDirection,
                ref remainingMovementLength,
                originalVelocityDirection,
                hitDistance,
                characterComponent.StepAndSlopeHandling.StepHandling,
                characterComponent.StepAndSlopeHandling.MaxStepHeight,
                characterComponent.StepAndSlopeHandling.CharacterWidthForStepGroundingCheck);
        }
        public void OverrideDynamicHitMasses(
            ref CharacterUpdateContext context,
            ref KinematicCharacterUpdateContext baseContext,
            ref PhysicsMass characterMass,
            ref PhysicsMass otherMass,
            BasicHit hit)
        {
        }
        public void ProjectVelocityOnHits(
            ref CharacterUpdateContext context,
            ref KinematicCharacterUpdateContext baseContext,
            ref float3 velocity,
            ref bool characterIsGrounded,
            ref BasicHit characterGroundHit,
            in DynamicBuffer<KinematicVelocityProjectionHit> velocityProjectionHits,
            float3 originalVelocityDirection)
        {
            CharacterComponent characterComponent = CharacterComponent.ValueRO;
            KinematicCharacterUtilities.Default_ProjectVelocityOnHits(
                ref velocity,
                ref characterIsGrounded,
                ref characterGroundHit,
                in velocityProjectionHits,
                originalVelocityDirection,
                characterComponent.StepAndSlopeHandling.ConstrainVelocityToGroundPlane,
                in CharacterDataAccess.CharacterBody.ValueRO);
        }
    }
 }
@@ -0,0 +1,2 @@
 fileFormatVersion: 2
 guid: d2bcdc39be82b4c4dbc85b799da194f3
@@ -0,0 +1,34 @@
 using Unity.Burst;
 using Unity.Entities;
 using Unity.NetCode;
 namespace ProjectM.Simulation
 {
    /// <summary>
    /// Bridges replicated <see cref="PlayerInput"/> + data-driven <see cref="EffectiveCharacterStats"/> into
    /// the CC processor's per-tick <see cref="CharacterControl"/>. Replaces the M5 <c>PlayerMoveSystem</c>:
    /// instead of writing PhysicsVelocity, it writes the desired world velocity that
    /// <see cref="CharacterProcessor"/> lerps toward inside the fixed-step character update. Runs in
    /// <see cref="PredictedSimulationSystemGroup"/> after <see cref="StatRecomputeSystem"/> (fresh MoveSpeed)
    /// and before the predicted fixed-step group (where the character physics steps). Derived purely from
    /// replicated input + recomputed stats → identical on server, owning client, and across rollback.
    /// Filtered to <see cref="Simulate"/> for predicted ghosts only.
    /// </summary>
    [UpdateInGroup(typeof(PredictedSimulationSystemGroup))]
    [UpdateAfter(typeof(StatRecomputeSystem))]
    [BurstCompile]
    public partial struct PlayerControlSystem : ISystem
    {
        [BurstCompile]
        public void OnUpdate(ref SystemState state)
        {
            foreach (var (control, input, stats) in
                     SystemAPI.Query<RefRW<CharacterControl>, RefRO<PlayerInput>, RefRO<EffectiveCharacterStats>>()
                         .WithAll<Simulate>())
            {
                control.ValueRW.MoveVelocity =
                    CharacterControlMath.DesiredMovement(input.ValueRO.Move, stats.ValueRO.MoveSpeed);
            }
        }
    }
 }
@@ -0,0 +1,2 @@
 fileFormatVersion: 2
 guid: d70cdf70e3ae53440aeb7274bdb27793
@@ -1,41 +0,0 @@
 using Unity.Burst;
 using Unity.Entities;
 using Unity.Mathematics;
 using Unity.NetCode;
 using Unity.Transforms;
 namespace ProjectM.Simulation
 {
    /// <summary>
    /// Canonical predicted system: advances each player's planar (XZ) position from twin-stick Move
    /// input. Runs inside the prediction loop on the owning client (re-simulated on rollback) and
    /// once per tick on the server; filtered to <see cref="Simulate"/> so only predicted ghosts move.
    /// Deterministic by construction: uses <c>SystemAPI.Time.DeltaTime</c> (the fixed tick step)
    /// only — no wall-clock, no <c>System.Random</c>. Move is clamped to unit length so diagonal
    /// keyboard movement is not faster than cardinal. Move speed is the data-driven
    /// <see cref="EffectiveCharacterStats.MoveSpeed"/> (authored base + active modifiers), recomputed
    /// each tick by <see cref="StatRecomputeSystem"/> which runs before this system.
    /// </summary>
    [UpdateInGroup(typeof(PredictedSimulationSystemGroup))]
    [BurstCompile]
    public partial struct PlayerMoveSystem : ISystem
    {
        [BurstCompile]
        public void OnUpdate(ref SystemState state)
        {
            float dt = SystemAPI.Time.DeltaTime;
            foreach (var (transform, input, stats) in
                     SystemAPI.Query<RefRW<LocalTransform>, RefRO<PlayerInput>, RefRO<EffectiveCharacterStats>>()
                         .WithAll<Simulate>())
            {
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                if (math.lengthsq(move) > 1f)
                    move = math.normalize(move);
                float3 delta = new float3(move.x, 0f, move.y) * stats.ValueRO.MoveSpeed * dt;
                transform.ValueRW.Position += delta;
            }
        }
    }
 }
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@@ -0,0 +1,58 @@
 using NUnit.Framework;
 using ProjectM.Simulation;
 using Unity.Mathematics;
 namespace ProjectM.Tests
 {
    /// <summary>
    /// Pure-helper unit tests for <see cref="CharacterControlMath.DesiredMovement"/> (M5b: Unity Character
    /// Controller). Replaces the M5 PlayerMoveSystemTests: the character now moves via collide-and-slide
    /// inside the predicted physics loop, so the unit-testable seam is the input→world-velocity mapping that
    /// <see cref="PlayerControlSystem"/> feeds the CC processor. The actual sweep/collision/replication is
    /// covered by the Play Mode runtime check (a full PhysicsWorld is not built in a bare EditMode world).
    /// Netcode-free and version-independent.
    /// </summary>
    public class CharacterControlMathTests
    {
        [Test]
        public void DesiredMovement_Maps_Cardinal_To_Planar_Velocity()
        {
            const float speed = 5f;
            var v = CharacterControlMath.DesiredMovement(new float2(1f, 0f), speed);
            Assert.AreEqual(speed, v.x, 1e-4f, "Move=(1,0) -> +X scaled by speed.");
            Assert.AreEqual(0f, v.y, 1e-4f, "Movement is planar; Y must be zero.");
            Assert.AreEqual(0f, v.z, 1e-4f, "Move=(1,0) maps to +X only; Z must be zero.");
        }
        [Test]
        public void DesiredMovement_Clamps_Diagonal_To_Unit_Speed()
        {
            const float speed = 6f;
            var v = CharacterControlMath.DesiredMovement(new float2(1f, 1f), speed);
            float planarSpeed = math.length(new float2(v.x, v.z));
            Assert.AreEqual(speed, planarSpeed, 1e-3f, "Diagonal input clamped to unit length -> speed == MoveSpeed.");
            Assert.AreEqual(0f, v.y, 1e-4f, "Linear Y must stay zero.");
        }
        [Test]
        public void DesiredMovement_Sub_Unit_Input_Is_Proportional()
        {
            const float speed = 10f;
            var v = CharacterControlMath.DesiredMovement(new float2(0.5f, 0f), speed);
            Assert.AreEqual(0.5f * speed, v.x, 1e-3f, "Sub-unit analog input scales speed proportionally (not renormalised).");
        }
        [Test]
        public void DesiredMovement_Is_Deterministic_And_Maps_Z()
        {
            var a = CharacterControlMath.DesiredMovement(new float2(0f, 1f), 3f);
            var b = CharacterControlMath.DesiredMovement(new float2(0f, 1f), 3f);
            Assert.AreEqual(a.z, b.z, 0f, "Deterministic: identical args -> identical result.");
            Assert.AreEqual(3f, a.z, 1e-4f, "Move=(0,1) maps to +Z scaled by speed.");
        }
    }
 }
@@ -0,0 +1,2 @@
 fileFormatVersion: 2
 guid: 051c0bdf57f9cca41963e3c2ed60b2bf
@@ -1,90 +0,0 @@
 using NUnit.Framework;
 using ProjectM.Simulation;
 using Unity.Core;
 using Unity.Entities;
 using Unity.Mathematics;
 using Unity.Transforms;
 namespace ProjectM.Tests
 {
    /// <summary>
    /// Plain-Entities determinism test for <see cref="PlayerMoveSystem"/> (the M1 predicted move
    /// system). Boots a bare ECS world, registers the system in the SimulationSystemGroup, creates a
    /// synthetic player (PlayerInput + EffectiveCharacterStats + LocalTransform + enabled Simulate),
    /// injects a fixed delta-time, ticks N times, and asserts the position advanced by exactly
    /// MoveSpeed * dt * N. As of M3 move speed is read from EffectiveCharacterStats (the data-driven
    /// effective stat) rather than the removed PlayerMoveStats. Version-independent and netcode-free.
    /// </summary>
    public class PlayerMoveSystemTests
    {
        [Test]
        public void PlayerMove_Advances_By_MoveSpeed_Times_Dt_Each_Tick()
        {
            using var world = new World("PlayerMoveTestWorld");
            var simulationGroup = world.GetOrCreateSystemManaged<SimulationSystemGroup>();
            var moveSystem = world.GetOrCreateSystem<PlayerMoveSystem>();
            simulationGroup.AddSystemToUpdateList(moveSystem);
            simulationGroup.SortSystems();
            var em = world.EntityManager;
            var entity = em.CreateEntity(
                typeof(PlayerInput), typeof(EffectiveCharacterStats), typeof(LocalTransform), typeof(Simulate));
            const float moveSpeed = 5f;
            const float dt = 0.1f;
            const int ticks = 10;
            em.SetComponentData(entity, LocalTransform.FromPosition(float3.zero));
            em.SetComponentData(entity, new EffectiveCharacterStats { MoveSpeed = moveSpeed, TurnRateRadiansPerSec = 0f, MaxHealth = 0f });
            em.SetComponentData(entity, new PlayerInput { Move = new float2(1f, 0f), Aim = float2.zero });
            for (int i = 0; i < ticks; i++)
            {
                // Fixed delta so the predicted move is fully deterministic (no wall-clock).
                world.SetTime(new TimeData(elapsedTime: dt * (i + 1), deltaTime: dt));
                simulationGroup.Update();
            }
            var position = em.GetComponentData<LocalTransform>(entity).Position;
            Assert.AreEqual(moveSpeed * dt * ticks, position.x, 1e-3f,
                "X should advance by MoveSpeed * dt each tick for Move=(1,0).");
            Assert.AreEqual(0f, position.y, 1e-3f, "Movement is planar; Y should stay 0.");
            Assert.AreEqual(0f, position.z, 1e-3f, "Move=(1,0) maps to +X only; Z should stay 0.");
        }
        [Test]
        public void PlayerMove_Is_Idempotent_Across_Equal_Tick_Batches()
        {
            // Determinism/idempotence: the same inputs and dt must yield the same result regardless
            // of how the ticks are grouped (mirrors the prediction loop re-simulating a tick).
            float3 RunTicks(int ticks)
            {
                using var world = new World("PlayerMoveDetWorld");
                var group = world.GetOrCreateSystemManaged<SimulationSystemGroup>();
                group.AddSystemToUpdateList(world.GetOrCreateSystem<PlayerMoveSystem>());
                group.SortSystems();
                var em = world.EntityManager;
                var e = em.CreateEntity(
                    typeof(PlayerInput), typeof(EffectiveCharacterStats), typeof(LocalTransform), typeof(Simulate));
                em.SetComponentData(e, LocalTransform.FromPosition(float3.zero));
                em.SetComponentData(e, new EffectiveCharacterStats { MoveSpeed = 3f, TurnRateRadiansPerSec = 0f, MaxHealth = 0f });
                em.SetComponentData(e, new PlayerInput { Move = new float2(0f, 1f), Aim = float2.zero });
                for (int i = 0; i < ticks; i++)
                {
                    world.SetTime(new TimeData(0.05f * (i + 1), 0.05f));
                    group.Update();
                }
                return em.GetComponentData<LocalTransform>(e).Position;
            }
            var a = RunTicks(20);
            var b = RunTicks(20);
            Assert.AreEqual(a.z, b.z, 1e-4f, "Two identical runs must produce identical positions.");
            Assert.AreEqual(3f * 0.05f * 20f, a.z, 1e-3f, "Move=(0,1) maps to +Z by MoveSpeed*dt*N.");
        }
    }
 }
@@ -1,2 +0,0 @@
 fileFormatVersion: 2
 guid: aed328b85e7264aa9aedca0a628c6169
@@ -8,6 +8,7 @@
        "Unity.Transforms",
        "Unity.Collections",
        "Unity.Mathematics",
        "Unity.Physics",
        "Unity.NetCode",
        "UnityEngine.TestRunner",
        "UnityEditor.TestRunner"
@@ -11,6 +11,7 @@ Multiplayer game on **Unity DOTS (Entities) + Netcode for Entities** — server-
 | `com.unity.collections` | 6.4.0 | (transitive) |
 | `com.unity.netcode` | **1.13.2** | Netcode **for Entities** (ECS). NOT `com.unity.netcode.gameobjects`. Independent 1.x line on Unity 6.4. |
 | `com.unity.physics` | **1.4.6** | Unity Physics (DOTS). Independent 1.x line on Unity 6.4. |
 | `com.unity.charactercontroller` | **1.4.2** | Unity Character Controller (DOTS, kinematic collide-and-slide). Player movement foundation (M5b). Declares `entities`/`physics` 1.3.15 but resolves on our 6.4.0/1.4.6 via SemVer floor (no downgrade). |
 | `com.unity.transport` | 2.7.2 | (transitive) |
 | `com.unity.burst` | 1.8.29 | (transitive) |
 | `com.unity.mathematics` | 1.3.3 | (transitive) |
@@ -50,6 +51,26 @@ Root namespace: **`ProjectM`**. Code lives under `Assets/_Project/Scripts/` in f
 - **In-editor input injection needs a focused Game view — unless you change two settings.** By default the Input System ignores injected/real device input while the Game view is unfocused, so headless (MCP `execute_code`) keypress simulation won't drive `IInputComponentData`. Fix (both now set in this project): `InputSettings.editorInputBehaviorInPlayMode = AllDeviceInputAlwaysGoesToGameView` + `Application.runInBackground = true`. For deterministic, device-independent validation prefer the editor-only **`DebugInputInjectionSystem`** (`ProjectM.Client`, `#if UNITY_EDITOR`): poke its statics from `execute_code` — `DebugInputInjectionSystem.Fire()` / `.SetMove(x,z)` / `.SetAim(x,z)` / `.Stop()` — to drive the local player's `PlayerInput` through the authentic command→prediction pipeline. (Validated: `SetMove` drives + replicates movement. One-shot `Fire` propagation needs a healthy editor — tick-batching under a degraded/corrupt-Burst editor drops one-shot `InputEvent`s while continuous values survive.)
 - **Prototype presentation glue lives in `ProjectM.Client` as MonoBehaviours.** `PrototypeCameraRig` (on the Main Camera) is a tunable player-following ARPG cam (default mid 3/4 ~45° perspective) that reads the local player ghost's `LocalTransform` each LateUpdate. Bright prototype URP-Lit materials are in `Assets/_Project/Materials/` (player cyan, dummy red, projectile yellow, ground grey). `ProjectM.Client` now references `Unity.Transforms` directly (the rig reads `LocalTransform`).
 ### Build gotchas (learned — M5 physics-in-prediction, 2026-06-01)
 - **Editing Assets `.cs` with the raw `Write` tool does NOT reliably trigger a Unity recompile** on an unfocused editor — `refresh_unity` did a domain reload *without* recompiling, so tests + `execute_code` ran a **stale assembly** (symptom: behaviour that exists in *neither* the old nor new source). **Always edit Assets `.cs` via MCP `apply_text_edits` / `create_script`** (Unity's own scripting pipeline) — never `Write`. (`Write`/`Edit` are fine for non-asset files: vault, asmdef JSON, etc.) See [[2026-06-01_M5_Physics_In_Prediction]].
 - **Predicted physics is implicit — there is no `PredictedPhysics` toggle.** With the netcode-physics package present (`Unity.NetCode.Physics`, `…Physics.Hybrid`) and predicted ghosts carrying physics components, Netcode relocates `PhysicsSystemGroup` into the **`PredictedFixedStepSimulationSystemGroup`** (a child of `PredictedSimulationSystemGroup`, marked **OrderFirst**). `NetCodePhysicsConfig` only tunes lag-comp / run-mode / history. Put one in the gameplay subscene with `PhysicGroupRunMode = LagCompensationEnabledOrAnyPhysicsEntities` so the group runs whenever physics entities exist.
 - **Unity Physics 1.x bakes built-in `UnityEngine` colliders + `Rigidbody`** — the old `PhysicsShapeAuthoring`/`PhysicsBodyAuthoring` (Physics 0.x) are **gone** (`unity_reflect` finds neither). Author a dynamic body with a `CapsuleCollider`/`BoxCollider` + `Rigidbody` (`useGravity=false` → planar/`PhysicsGravityFactor`=0; `isKinematic=false`; `interpolation=Interpolate` → `PhysicsGraphicalSmoothing`). Static colliders = collider, no Rigidbody, baked into the subscene (present identically in server + client worlds, deterministic, no replication).
 - **`PhysicsVelocity` auto-replicates** — Netcode ships `PhysicsVelocityDefaultVariant` + a generated serializer, so a predicted-physics ghost needs **no hand-written `[GhostField]`** for velocity (`LocalTransform` is already replicated). Drive the character by writing `PhysicsVelocity.Linear`, not by teleporting `LocalTransform`.
 - **`Rigidbody.FreezeRotation` is NOT honored by the DOTS baker** (baked `PhysicsMass.InverseInertia` stays non-zero). Hold a top-down character's facing by zeroing angular velocity each tick + writing rotation directly (`PlayerAimSystem`); set `PhysicsMass.InverseInertia = float3.zero` in a baker/system if a hard lock is needed.
 - **Gravity-off bodies accumulate vertical contact impulses permanently** (a capsule rides up a box edge and floats away — looks like tunnelling, isn't). Pin players to the movement plane *after* the physics step: a system in `PredictedSimulationSystemGroup` `[UpdateAfter(PredictedFixedStepSimulationSystemGroup)]` clamping Y to `PlayerSpawner.SpawnPoint.y` + zeroing `Linear.y` (`PlayerPlanarConstraintSystem`).
 - **The predicted physics group is OrderFirst**, so a system in `PredictedSimulationSystemGroup` with `[UpdateBefore(PredictedFixedStepSimulationSystemGroup)]` is **ignored** (OrderFirst/OrderLast wins) → 1-tick velocity offset (consistent across server/client/rollback — prediction stays in sync). For same-tick application, put the system *inside* `PredictedFixedStepSimulationSystemGroup` `[UpdateBefore(Unity.Physics.Systems.PhysicsSystemGroup)]` (verified to sort before the step) — but expect cosmetic "invalid UpdateBefore" warnings from the relocation.
 ### Build gotchas (learned — M5b Unity Character Controller, 2026-06-01)
 - **The player is now a Unity Character Controller kinematic character, NOT a dynamic Rigidbody.** `PlayerMoveSystem` + `PlayerPlanarConstraintSystem` (M5) are **deleted**. Movement: `PlayerControlSystem` maps `PlayerInput.Move` × `EffectiveCharacterStats.MoveSpeed` → `CharacterControl` (via the unit-tested `CharacterControlMath.DesiredMovement`); `CharacterProcessor` (collide-and-slide) consumes it in `CharacterPhysicsUpdateSystem` (`[UpdateInGroup(KinematicCharacterPhysicsUpdateGroup)]`, relocated into the predicted loop). The DR-006 predicted-physics infra (`NetCodePhysicsConfig`, baked static walls) is **kept** — the CC character sweeps against that same PhysicsWorld.
 - **A package declaring an older `com.unity.entities`/`com.unity.physics` dependency can still resolve on our renumbered stack** — Unity treats the dep as a SemVer **floor**, so Entities 6.4.0 satisfies a `1.3.15` requirement and is NOT downgraded. Don't trust a version-string mismatch as "incompatible": **probe** (add the package, confirm `packages-lock.json` kept Entities 6.4.0 / Physics 1.4.6 / Netcode 1.13.2 + a clean compile; rollback if not). CC 1.4.2 verified this way.
 - **CC 1.4.2 API shape = `IKinematicCharacterProcessor<T>` + `KinematicCharacterDataAccess` + static `KinematicCharacterUtilities.Update_*`.** The legacy `KinematicCharacterAspect` (IAspect, instance `Update_*`) also exists but is NOT what the 1.4.x samples use — verify the installed shape with `unity_reflect`, don't assume. (A sub-agent's package-cache read disagreed with reflect; reflect + first-try clean compile won.)
 - **`KinematicCharacterUtilities.BakeCharacter` aborts** (logs an error, adds nothing) **if the GameObject has a `Rigidbody`** and requires uniform (1,1,1) scale. The player prefab keeps its `CapsuleCollider` (baked into `PhysicsCollider`) but the M5 `Rigidbody` was removed. Two bakers on one prefab GameObject (`PlayerAuthoring` + `PlayerCharacterAuthoring`) is fine — both resolve the same entity.
 - **`CharacterInterpolation` must be PredictedClient-only.** `BakeCharacter` adds it to all prefab versions; a `DefaultVariantSystemBase` registers `CharacterInterpolation → [GhostComponent(PrefabType = GhostPrefabType.PredictedClient)]` so it's stripped from server + interpolated-client prefabs (else double-interp on remotes). Verified: server ghost has no `CharacterInterpolation`, client ghost does.
 - **Do NOT copy the CC sample's global `LocalTransform → DontSerializeVariant`.** It is project-wide and would break the non-character ghosts here (projectiles/dummies/pickups) that rely on stock `LocalTransform` replication. Our CC character replicates position via the normal owner-predicted `LocalTransform` path; only the `CharacterInterpolation` variant is registered.
 - **Top-down CC config (planar, no gravity):** `AuthoringKinematicCharacterProperties` with `SnapToGround=false`, `InterpolateRotation=false` (rotation owned by `PlayerAimSystem`), `SimulateDynamicBody=false` (players don't physically push each other); gravity is handled in the processor by feeding `float3.zero` to `Update_GroundPushing` and never adding a gravity term. Result: stays on the spawn plane (y≈1) with no planar-pin system.
 ## Bootstrap & worlds
 - `ProjectM.Simulation.GameBootstrap : ClientServerBootstrap` → overrides `Initialize`, sets `AutoConnectPort = 7979` (in-editor auto-connect over IPC; set in M1 — was 0), calls `CreateDefaultClientServerWorlds()`. Entering Play Mode creates separate `ServerWorld` (`WorldFlags.GameServer`) and `ClientWorld` (`WorldFlags.GameClient`) — verified.
@@ -28,4 +28,14 @@ Unordered pool of candidate work. Promote to a [[Milestones|milestone]] when com
 - [ ] **M3 follow-up — multi-prefab abilities** (a per-ability *different* projectile ghost) needs `ProjectileClassificationSystem` generalized beyond the single shared prefab.
 - [ ] **M3 follow-up — standalone-server debug modifier path** via `IRpcCommand` (current `DebugModifierInjectionSystem` is in-editor single-process only).
 - [ ] **M3 follow-up — rate-limited turning** (`PlayerAimSystem` still snaps rotation; `EffectiveCharacterStats.TurnRate` is wired but unused).
- [ ] **M3 polish — pickup visuals** (primitive sphere/default material currently); pickup auto-grant feel (continuous overlap).
+- [ ] **M3 polish — pickup visuals** (primitive sphere/default material currently); pickup auto-grant feel (continuous overlap).
 - [ ] **M5 — base subscene streaming** (the other half of M5): persistent home-base subscene that streams in/out around players. Physics-in-prediction slice is done ([[DR-006_M5_Physics_In_Prediction]]).
 - [ ] ~~**M5 follow-up — same-tick movement**~~ — moot after M5b (the CC character runs in the predicted fixed-step group; M5's `PlayerMoveSystem` is deleted). See [[DR-007_M5b_Character_Controller_Package]].
 - [ ] **M5b follow-up — multi-client CC interpolation validation**: live two-build / thin-client run to confirm remote-peer interpolation smoothness (predicted-only `CharacterInterpolation` variant is in; only single-client validated). Pairs with the deferred M4 real-LAN two-build test.
 - [ ] **M5b follow-up — player-vs-player collision**: currently non-physical (`SimulateDynamicBody=false`); enable + handle masses if mutual push is wanted.
 - [ ] **M5b follow-up — KinematicCharacterBody velocity ghost variant** (replicate RelativeVelocity/IsGrounded) if owner-prediction reconciliation looks jittery under latency.
 - [ ] **M5b follow-up — gravity/verticality**: CC character is gravity-free + planar (no floor collider). Add gravity in the processor + a ground collider + reconsider `SnapToGround` if terrain/verticality is introduced.
 - [ ] **M5b follow-up — CC package version**: 1.4.2 declares `entities/physics@1.3.x` (resolves via SemVer floor on our 6.4.0/1.4.6). Move to a CC build explicitly targeting Entities 6.x when published.
 - [ ] **M5 follow-up — physics lag compensation** (`NetCodePhysicsConfig.EnableLagCompensation` + `PhysicsWorldHistorySingleton`) if/when physics-based hit detection replaces the swept-segment server check.
 - [ ] **M5 follow-up — projectiles as physics bodies** (currently kinematic + swept hit); convert for projectile-vs-world collision.
 - [ ] **M5 follow-up — hard rotation lock** (`PhysicsMass.InverseInertia=0`); `Rigidbody.FreezeRotation` is not honored by the DOTS baker, so rotation is held by per-tick angular-zero + aim write.
@@ -15,7 +15,7 @@ permalink: gamevault/06-roadmap/milestones
 | **M2 — Combat** | Directional ability fire + deterministic soft auto-target; server-authoritative damage/health | ✅ Done 2026-05-31 — runtime-validated on 6.4.7: input→fire→**predicted projectile**→**swept hit**→server damage→`Health` `[GhostField]` replicated server→client; movement + fire confirmed live; EditMode 22/22. Predicted-projectile + server auto-target + non-Burst classifier — [[DR-003_M2_Combat_Netcode_Architecture]], [[2026-05-31_M2_Combat]]. (Projectile ghost-map errors were later root-caused to a `[ReadOnly]`-write in `ProjectileClassificationSystem` — fixed 2026-06-01, see [[2026-06-01_M4_LAN_CoOp_And_Classification_Fix]] — NOT two-editor tick-batching as first thought.) |
 | **M3 — Data-driven abilities & modifiers** | Ability **and** character stats authored in ScriptableObjects, baked to DOTS **blob assets**; runtime **flat + % modifier** stacks (upgrades/buffs) → effective stats, server-authoritative + prediction-correct. Pattern slice: refactor the current projectile ability + 1–2 sample abilities onto the data model. | ✅ Done 2026-05-31 — runtime-validated on 6.4.7: blob DB baked into both worlds; data-driven base + replicated `StatModifier` ghost buffer → **identical effective stats on server & owner-predicted client** (held under tick-batching); data-only ability swap; real pickup grant; EditMode 38/38. Blob DB + replicated modifier buffer + every-tick effective recompute — [[DR-004_M3_DataDriven_Abilities_Modifiers]], [[2026-05-31_M3_Data_Driven_Abilities]]. |
 | **M4 — Co-op** | 2–4 players; client-hosted listen-server (Direct IP/LAN now, Unity Relay later) | 🚧 In progress 2026-06-01 — **LAN slice done + runtime-validated**: no-auto-connect `ConnectionConfig` + request-component host/join, editor auto-host + thin clients, deterministic ring spawn; 3 clients (1 real + 2 thin) connect→spawn (distinct slots)→replicate→clean disconnect; `ConnectionUI` for builds; EditMode 45/45. **Unity Relay + real two-build LAN join deferred** — [[DR-005_M4_Connection_Model_Direct_IP]], [[2026-06-01_M4_LAN_CoOp_And_Classification_Fix]]. |
-| **M5 — Home base + physics** | Persistent base subscene streaming + Unity Physics in the predicted loop | ⬜ |
+| **M5 — Home base + physics** | Persistent base subscene streaming + Unity Physics in the predicted loop | 🚧 In progress 2026-06-01 — **physics-in-prediction slice done + runtime-validated** on 6.4.7: player is a velocity-driven dynamic Unity Physics body in the predicted loop (built-in `CapsuleCollider`+`Rigidbody` bake; `PhysicsVelocity` auto-replicated), collides with baked static walls (stops at the surface, no tunnel/climb-over), planar-pinned, **server == client** with no desync; EditMode 51/51. **Base subscene streaming deferred** to a later pass — [[DR-006_M5_Physics_In_Prediction]], [[2026-06-01_M5_Physics_In_Prediction]]. **M5b (same day): player movement re-founded on the Unity Character Controller package** (`com.unity.charactercontroller` 1.4.2) — kinematic collide-and-slide, owner-predicted, data-driven speed; replaces the dynamic-Rigidbody mover (keeps the DR-006 predicted-physics infra). Runtime-validated (collide-and-slide, planar, server==client, CharacterInterpolation predicted-only); EditMode 47/47 — [[DR-007_M5b_Character_Controller_Package]], [[2026-06-01_M5b_Character_Controller]]. |
 | **M6 — Build/placement** | Server-authoritative grid build placement via RPC | ⬜ |
 | **M7 — Automation** | Self-running tick-based production chains (deterministic offline catch-up) | ⬜ |
@@ -0,0 +1,44 @@
 ---
 date: 2026-06-01
 type: session
 tags: [session, dots, netcode, physics, prediction, m5]
 permalink: gamevault/07-sessions/2026/2026-06-01-m5-physics-in-prediction
 ---
 # Session 2026-06-01 — M5 physics-in-prediction (velocity-driven character)
 ## Goal
 Start **M5 — Home base + physics** ([[Milestones]]). Operator scoped this pass to **physics-in-prediction first**: bring Unity Physics (1.4.6) into Netcode's predicted loop as a deterministic, rollback-safe foundation before base-streaming. Deliverable: the player becomes a dynamic physics body driven by input velocity, colliding with static world geometry + other players, replicating server→client with no desync. Projectiles stay kinematic. Architecture locked in [[DR-006_M5_Physics_In_Prediction]].
 ## Done
 - **Velocity-driven movement.** `PlayerMoveSystem` rewritten from teleporting `LocalTransform.Position` → writing `PhysicsVelocity.Linear = dir * EffectiveCharacterStats.MoveSpeed` (Y zeroed, angular zeroed); Unity Physics integrates + resolves contacts. Kept in `PredictedSimulationSystemGroup` (the predicted physics group is OrderFirst, so velocity applies on the next step — a 1-tick offset that is consistent across server/client/rollback). `Unity.Transforms`/`Unity.Physics.Systems` usings dropped.
 - **Player physics body (built-in authoring).** `Player.prefab` got a `CapsuleCollider` (r 0.5, h 2) + `Rigidbody` (`useGravity=false`, dynamic, `FreezeRotation`, `interpolation=Interpolate`) → bakes `PhysicsCollider`/`PhysicsVelocity`/`PhysicsMass`/`PhysicsGravityFactor`(0)/`PhysicsGraphicalSmoothing`. Unity Physics 1.x bakes built-in colliders + `Rigidbody`; the old `PhysicsShape/BodyAuthoring` are gone.
 - **Planar pin.** New `PlayerPlanarConstraintSystem` (after the fixed-step physics group) clamps player Y to `PlayerSpawner.SpawnPoint.y` + zeroes vertical velocity — stops gravity-free capsules from riding up box edges and floating away (the actual cause of the first "tunnelling" symptom; see below).
 - **Subscene content.** `Gameplay.unity` gained a `NetCodePhysicsConfig` singleton (`PhysicGroupRunMode = LagCompensationEnabledOrAnyPhysicsEntities`, `EnableLagCompensation = false`) and 3 static box-collider obstacles (`Pillar_Center`, `Wall_East`, `Wall_North`, red). Re-baked.
 - **Tests.** `ProjectM.Tests.EditMode` asmdef gained `Unity.Physics`; `PlayerMoveSystemTests` rewritten from teleport-position asserts → velocity-mapping asserts (cardinal, diagonal unit-clamp, sub-unit proportional, determinism + angular-zero).
 ## Validation
 - **EditMode 51/51 green** (47 prior suites + 4 rewritten PlayerMove tests); M1–M4 suites unaffected.
 - **Runtime (single in-editor client, 6.4.7):** player baked with all physics components on **server + client**; CollisionWorld holds 4 collider bodies (player + 3 static), raycast confirms solid walls. Driving +X into `Wall_East` (face x≈5.75) → capsule **stops at x=5.25 = face − radius** on both worlds, **holds under continuous push** (no tunnel, no creep), **Y pinned at 1.00** (no climb-over), and **releases to free movement** on reverse. **Server == client exactly** (prediction in sync). Console clean of all five M2/M4 cascade signatures + Burst "not a known entry point"; only the known unfocused-editor `Server Tick Batching` artifact remains.
 ## Diagnosis notes (for future me)
 - **First symptom looked like tunnelling; it was climb-over.** Colliders were solid (raycast hit), but with gravity off the capsule took a vertical contact impulse, rose above the short (y[0,1]) walls, and floated away at constant velocity. Fix = planar pin + taller walls. Not a collision-detection bug.
 - **A whole detour was caused by `Write`-tool edits to `.cs` not triggering a Unity recompile** on this unfocused editor — tests/`execute_code` ran a **stale assembly** (velocity showed `MoveSpeed*dt`, angular not zeroed: code that existed in neither old nor new source). Switching to MCP `apply_text_edits` (Unity's own scripting pipeline) fixed it immediately. **Always edit Assets `.cs` via `apply_text_edits`/`create_script`, never the raw `Write` tool.**
 ## Decisions
 - [[DR-006_M5_Physics_In_Prediction]] — implicit predicted physics (no toggle); built-in collider+Rigidbody authoring; velocity-driven move; `PhysicsVelocity` auto-replication; planar pin; baked static world. Physics-first ordering (1-tick offset); `FreezeRotation` not baked → angular-zero held in code.
 ## Open / deferred
 - **Base subscene streaming** — the other half of M5 (persistent home base, stream in/out around players). Not started this pass.
 - **Lag compensation** — `EnableLagCompensation=false`; revisit if/when physics-based hit detection replaces the swept-segment server check.
 - **Same-tick movement** — currently a 1-tick velocity offset (physics group is OrderFirst). Move `PlayerMoveSystem` into the fixed-step group `[UpdateBefore(PhysicsSystemGroup)]` if responsiveness needs it (costs 2 cosmetic warnings).
 - **Projectiles as physics bodies** — still kinematic + swept-hit; convert if projectile-vs-world collision is wanted.
 - **Rotation lock** — relying on per-tick angular-zero + aim write; set `PhysicsMass.InverseInertia=0` if a hard lock is needed.
 - **Player-vs-player collision** is server-authoritative (both dynamic on server); on clients others are interpolated, so peer collisions are approximate and server-corrected — fine for 2–4.
 ## Next
 Either (a) the **base subscene streaming** half of M5, or (b) layer **Unity Relay** onto M4's `ConnectionConfig` to make co-op remote-playable. Recommend (a) to complete M5.
@@ -0,0 +1,46 @@
 ---
 date: 2026-06-01
 type: session
 tags: [session, dots, netcode, physics, character-controller, prediction, m5]
 permalink: gamevault/07-sessions/2026/2026-06-01-m5b-character-controller
 ---
 # Session 2026-06-01 — M5b: adopt the Unity Character Controller package
 ## Goal
 Operator decision: replace the M5 dynamic-Rigidbody player ([[DR-006_M5_Physics_In_Prediction]]) with Unity's **Character Controller package** (kinematic, collide-and-slide, DOTS, netcode-predicted) as the player's movement foundation. Run via `/dots-dev` with a multi-agent research workflow. Architecture locked in [[DR-007_M5b_Character_Controller_Package]].
 ## Process
 - **Read-only research workflow** (6 parallel Explore agents → synthesis): compatibility (two angles), CC netcode setup, CC core API, codebase impact. Returned a unified plan + a hard compatibility verdict.
 - **Compatibility gate (the make-or-break):** research said CC 1.4.2 declares `entities/physics@1.3.15` vs our Entities 6.4.0 (Unity-6 renumber) — *likely incompatible*. Resolved by an **empirical install probe** (operator-gated): added the package, confirmed the lock kept Entities 6.4.0 / Physics 1.4.6 / Netcode 1.13.2 (no downgrade) and compiled clean. The floors were satisfied → **it works**. Probe → pause → operator "go".
 - **Port:** a sub-agent fetched the OnlineFPS netcode-character sample verbatim; I reconciled its API against the **installed** 1.4.2 via `unity_reflect` (the canonical path is `IKinematicCharacterProcessor<T>` + `KinematicCharacterDataAccess` + static `KinematicCharacterUtilities.Update_*`; the legacy `KinematicCharacterAspect` also exists but isn't what the samples use). Authored a minimal top-down adaptation.
 ## Done
 - **New (`ProjectM.Simulation`):** `CharacterComponent` + `CharacterControl` (CharacterComponents.cs); `CharacterControlMath.DesiredMovement` (unit-test seam); `CharacterProcessor` (the IKinematicCharacterProcessor running the Update_* sequence, gravity-free, velocity-controlled); `CharacterPhysicsUpdateSystem` (`KinematicCharacterPhysicsUpdateGroup`); `PlayerControlSystem` (PlayerInput × MoveSpeed → CharacterControl); `CharacterGhostVariants` (CharacterInterpolation → PredictedClient-only).
 - **New (`ProjectM.Authoring`):** `PlayerCharacterAuthoring` — baker calls `KinematicCharacterUtilities.BakeCharacter` (top-down props) + adds CharacterComponent/CharacterControl.
 - **Modified:** `ProjectM.Simulation.asmdef` + `ProjectM.Authoring.asmdef` (+`Unity.CharacterController`, Authoring +`Unity.Physics`); `Player.prefab` (removed M5 Rigidbody, kept CapsuleCollider, added PlayerCharacterAuthoring, scale 1); `StatRecomputeSystem` (dropped the now-dangling `[UpdateBefore(PlayerMoveSystem)]`).
 - **Deleted:** `PlayerMoveSystem`, `PlayerPlanarConstraintSystem` (CC + no-gravity stays planar — no constraint needed); `PlayerMoveSystemTests` → `CharacterControlMathTests`.
 - **Kept:** PlayerInput + input gather + DebugInputInjectionSystem, EffectiveCharacterStats/StatRecompute, GhostOwner/spawn/co-op ring, PlayerAimSystem, combat/health, the `NetCodePhysicsConfig` + baked static walls from DR-006.
 ## Validation
 - **EditMode 47/47 green** (4 new CharacterControlMath tests replace the 4 old PhysicsVelocity-mapping tests).
 - **Runtime (single in-editor client, 6.4.7):** player bakes the full CC set (`KinematicCharacterBody/Properties`, `PhysicsCollider`, `CharacterControl`, `CharacterComponent`, `CharacterInterpolation`, the 4 CC buffers) on **both** worlds; spawns at the ring slot (2.5,1,0). Driving +X stops the capsule at **x=5.24** (= `Wall_East` face − radius) on **server and client**; diagonal input **slides along** the wall and rounds its finite end (collide-and-slide, no tunnel); **Y holds 1.00 with no planar-pin system**; **server == client**. `CharacterInterpolation` confirmed on the client ghost, **absent on the server** (predicted-only variant works). Console clean of CC/Burst/cascade signatures — only the known unfocused-editor tick-batching artifact.
 ## Decisions
 - [[DR-007_M5b_Character_Controller_Package]] — CC 1.4.2 resolves on our stack (SemVer floors, no downgrade); kinematic collide-and-slide owner-predicted character via the static-utilities pattern; data-driven velocity from existing PlayerInput/stats; CharacterInterpolation predicted-only; do NOT globally DontSerialize LocalTransform (protects non-character ghosts); supersedes the DR-006 dynamic-Rigidbody mover, keeps the DR-006 predicted-physics infra.
 ## Diagnosis notes (for future me)
 - **The compatibility "no" was a false alarm** — a package declaring an older `entities@1.3.x` dependency still resolves against the renumbered Entities 6.4.0 (SemVer floor); always **probe** rather than trust the version-string mismatch. Verify the lock didn't downgrade + the package compiles.
 - **Trust `unity_reflect` over sub-agent package-cache reads** for the installed API shape: reflect showed both the aspect (legacy) and the static-utilities path; the samples use the latter, which compiled first-try.
 - Continued to edit Assets `.cs` exclusively via MCP `create_script`/`apply_text_edits` (see [[2026-06-01_M5_Physics_In_Prediction]] / the Write-tool stale-assembly trap).
 ## Open / deferred
 - **Multi-client co-op interpolation** — validate remote-peer smoothness with a live two-build / thin-client run (predicted-only `CharacterInterpolation` variant is in place; single-client validated).
 - **Player-vs-player non-physical** (`SimulateDynamicBody=false`); **gravity-free/no floor** (planar); **CC declares older deps** (revisit on CC bump); optional **KinematicCharacterBody velocity ghost variant** for tighter reconciliation under latency.
 ## Next
 Recommend a **real two-build LAN co-op smoke test** (also closes the M4 deferral) to validate remote CC interpolation, then resume the **base subscene streaming** half of M5.
@@ -0,0 +1,37 @@
 ---
 id: DR-006
 title: M5 physics-in-prediction — velocity-driven character on Unity Physics in the predicted loop; planar pin
 status: accepted
 date: 2026-06-01
 tags:
 - decision
 - netcode
 - physics
 - prediction
 - m5
 permalink: gamevault/07-sessions/decisions/dr-006-m5-physics-in-prediction
 ---
 # DR-006 — M5 Physics-in-Prediction (velocity-driven character; planar pin)
 ## Context
 M5 ([[Milestones]]) = "home base + physics". The operator scoped this first pass to **physics-in-prediction**: stand up Unity Physics (1.4.6) *inside* Netcode's predicted simulation loop before any base-streaming work, because deterministic, rollback-safe physics is the highest-risk netcode surface in the roadmap. Through M4 the player moved by **teleporting `LocalTransform.Position`** (`PlayerMoveSystem`, kinematic) — no collision, no bodies. `Unity.Physics` was already referenced by `ProjectM.Simulation`, and the netcode-physics integration assemblies (`Unity.NetCode.Physics`, `…Physics.Hybrid`) ship with our stack. Validated against Unity package docs + `unity_reflect` against the installed packages (context7 MCP was unavailable this session — fell back to official docs + reflection). Extends [[DR-005_M4_Connection_Model_Direct_IP]].
 ## Decision
 1. **Predicted physics is implicit — no toggle.** With the netcode-physics package present and predicted ghosts carrying physics components, Netcode relocates `PhysicsSystemGroup` into the `PredictedFixedStepSimulationSystemGroup` (a child of `PredictedSimulationSystemGroup`, marked **OrderFirst**). `NetCodePhysicsConfig` has **no `PredictedPhysics` field** — it only tunes lag-comp / run-mode / history. A single `NetCodePhysicsConfig` lives in the `Gameplay` subscene with `PhysicGroupRunMode = LagCompensationEnabledOrAnyPhysicsEntities` (so the predicted physics group runs whenever physics entities exist) and `EnableLagCompensation = false` (our damage is swept-segment + server-side; lag comp deferred).
 2. **The player is a velocity-driven dynamic body, authored with built-in components.** Unity Physics **1.x bakes built-in `UnityEngine` colliders + `Rigidbody`** — the old `PhysicsBodyAuthoring`/`PhysicsShapeAuthoring` (Physics 0.x) are gone. `Player.prefab` gets a `CapsuleCollider` (r 0.5, h 2) + a `Rigidbody` (`useGravity=false` → planar, `isKinematic=false`, `FreezeRotation`, `interpolation=Interpolate`). These bake to `PhysicsCollider` / `PhysicsVelocity` / `PhysicsMass` / `PhysicsGravityFactor`(0) / `PhysicsGraphicalSmoothing`. `PlayerMoveSystem` now writes `PhysicsVelocity.Linear = dir * MoveSpeed` (Y zeroed, angular zeroed) instead of teleporting; the solver integrates + resolves contacts.
 3. **`PhysicsVelocity` auto-replicates.** Netcode ships `PhysicsVelocityDefaultVariant` + a generated serializer, so no hand-written `[GhostField]` is needed; `LocalTransform` is already replicated on the player ghost. Owner-predicted player (`DefaultGhostMode=OwnerPredicted`) → owner predicts physics, other clients interpolate (Simulate disabled), server is authoritative.
 4. **Players are pinned to the movement plane after the step.** `PlayerPlanarConstraintSystem` (`PredictedSimulationSystemGroup`, `[UpdateAfter(PredictedFixedStepSimulationSystemGroup)]`) clamps each predicted player's Y to `PlayerSpawner.SpawnPoint.y` (single source) and zeroes vertical velocity. Required because with gravity off, any vertical contact impulse (a capsule riding a box edge) is **permanent** — without the pin the character climbs over obstacles and floats away.
 5. **Static world geometry is baked, not ghosted.** Three static box colliders (`Pillar_Center`, `Wall_East`, `Wall_North`, red `M_Dummy`) added to the `Gameplay` subscene — present identically in server + client worlds (deterministic, no replication). Projectiles stay kinematic this pass.
 ## Consequences
 - **Validated end to end on 6.4.7.** EditMode 51/51 (4 new `PlayerMoveSystemTests`: cardinal map, diagonal unit-clamp, sub-unit proportional, determinism+angular-zero). Runtime: player baked with all physics components on **both** worlds; 4 `PhysicsCollider` bodies; driving +X into `Wall_East` (face x≈5.75) stops the capsule at **x=5.25** (= face − radius) on server **and** client, holds there under continuous push (no tunnel, no creep), Y pinned at 1.00 (no climb-over), and releases to free movement on reverse. **Server == client exactly** — prediction in sync, console clean of all five M2/M4 cascade signatures and Burst errors.
 - **Ordering: physics runs *before* `PlayerMoveSystem` (1-tick velocity offset).** The fixed-step group is **OrderFirst**, so `[UpdateBefore]` against it is ignored (the attribute was removed to keep the console warning-free). The offset is identical on server + owning client + rollback, so prediction stays consistent and the lag is absorbed by prediction. If same-tick responsiveness is ever needed, move `PlayerMoveSystem` *into* `PredictedFixedStepSimulationSystemGroup` `[UpdateBefore(PhysicsSystemGroup)]` (verified to sort correctly) — at the cost of two cosmetic "invalid UpdateBefore" warnings from the netcode physics relocation.
 - **`Rigidbody.FreezeRotation` is NOT honored by the DOTS baker** — baked `PhysicsMass.InverseInertia` stayed non-zero. Rotation is instead held by zeroing angular velocity each tick (`PlayerMoveSystem`) + `PlayerAimSystem` writing the facing directly. If precise rotation lock is needed later, set `PhysicsMass.InverseInertia = 0` in a baker/system.
 - **The known unfocused-editor `Server Tick Batching` artifact persists** (1.25–1.75 ticks/frame) — clears when the Game view is focused / in a build (see [[2026-06-01_M4_LAN_CoOp_And_Classification_Fix]]). It does not desync the physics in-session.
 - **Determinism caveat (deferred):** Unity Physics is same-binary deterministic, which is what client re-simulation needs; cross-platform float determinism is not guaranteed but the server is authoritative and corrects via snapshots + `PhysicsGraphicalSmoothing`. No lag compensation yet (`EnableLagCompensation=false`).
 Mirrors the server-authoritative + client-prediction pillars from [[Pillars]]; unblocks the base-streaming half of M5.
@@ -0,0 +1,45 @@
 ---
 id: DR-007
 title: M5b — adopt Unity Character Controller package for the predicted player (replaces the dynamic-Rigidbody mover)
 status: accepted
 date: 2026-06-01
 tags:
 - decision
 - netcode
 - physics
 - character-controller
 - prediction
 - m5
 permalink: gamevault/07-sessions/decisions/dr-007-m5b-character-controller-package
 ---
 # DR-007 — M5b Unity Character Controller (kinematic, owner-predicted)
 ## Context
 The M5 player ([[DR-006_M5_Physics_In_Prediction]]) was a **dynamic Unity Physics Rigidbody** driven by setting `PhysicsVelocity` each tick. It worked, but only with workarounds the kinematic approach avoids by design: a planar-pin system (gravity-off bodies accumulate vertical contact impulses and climb over walls), per-tick angular-zeroing, and `Rigidbody.FreezeRotation` (which the DOTS baker ignores). The operator chose to adopt Unity's **Character Controller package** (`com.unity.charactercontroller`) — a DOTS, collide-and-slide kinematic controller with first-class Netcode-for-Entities prediction — as the player's movement foundation. Researched via a read-only workflow + verified against the installed API with `unity_reflect`. Supersedes the **movement** half of DR-006; the predicted-physics infrastructure DR-006 stood up (predicted physics group, `NetCodePhysicsConfig`, baked static walls) is **kept** and is exactly what the CC character sweeps against.
 ## Decision
 1. **CC version: `com.unity.charactercontroller` 1.4.2 — verified to resolve on our stack.** It declares `com.unity.entities@1.3.15` / `com.unity.physics@1.3.15`, but Unity treats these as SemVer **floors**: the resolver kept our **Entities 6.4.0 / Physics 1.4.6 / Netcode 1.13.2 / Collections 6.4.0** with **no downgrade**, and CC 1.4.2 compiled clean against the renumbered Entities 6.x. (Empirical install probe was the gate; the docs' "installation will fail" prediction was wrong.)
 2. **Kinematic collide-and-slide, owner-predicted.** The player is a `KinematicCharacterBody` (no Rigidbody). `BakeCharacter` adds the CC component/buffer set + bakes the prefab's `CapsuleCollider` into `PhysicsCollider`. Top-down config: `SnapToGround=false`, gravity handled in the processor (fed `float3.zero`), `InterpolateRotation=false` (rotation stays owned by `PlayerAimSystem`), `SimulateDynamicBody=false`.
 3. **CC API pattern (1.4.2): `IKinematicCharacterProcessor<T>` + `KinematicCharacterDataAccess` + static `KinematicCharacterUtilities.Update_*`.** The legacy `KinematicCharacterAspect` (IAspect, instance `Update_*`) still exists but the static-utilities path is what the 1.4.x samples use — confirmed via reflect. The processor runs the canonical Update sequence (Initialize→ParentMovement→Grounding→[velocity control]→PreventGrounding→GroundPushing→MovementAndDecollisions→…) in `CharacterPhysicsUpdateSystem` (`[UpdateInGroup(KinematicCharacterPhysicsUpdateGroup)]`, which netcode relocates into the predicted fixed-step loop).
 4. **Data-driven + reuse the existing input.** `PlayerControlSystem` (`PredictedSimulationSystemGroup`, `[UpdateAfter(StatRecomputeSystem)]`) maps the replicated `PlayerInput.Move` × `EffectiveCharacterStats.MoveSpeed` → a non-replicated `CharacterControl.MoveVelocity` (clamp via the unit-tested `CharacterControlMath.DesiredMovement`); the processor lerps `RelativeVelocity` toward it. No second input component; spawn / GhostOwner / co-op ring unchanged.
 5. **Ghost variants: only `CharacterInterpolation` → PredictedClient-only.** `BakeCharacter` adds `CharacterInterpolation` to every prefab version; a `DefaultVariantSystemBase` + `[GhostComponentVariation(typeof(CharacterInterpolation))] [GhostComponent(PrefabType = GhostPrefabType.PredictedClient)]` strips it from server + interpolated-client prefabs (presentation-only; double-interp on remotes otherwise). **We deliberately do NOT register the CC sample's global `LocalTransform → DontSerializeVariant`** — that is project-wide and would break our non-character ghosts (projectiles/dummies/pickups) that rely on stock `LocalTransform` replication. The character replicates position via the normal owner-predicted `LocalTransform` path.
 ## Consequences
 - **Validated on 6.4.7.** EditMode 47/47 (the 4 M5 PhysicsVelocity-mapping tests replaced by 4 `CharacterControlMath` tests). Runtime (single in-editor client): player bakes the full CC set on **both** worlds; driving into `Wall_East` (face x≈5.75) stops the capsule at **x=5.24** = face − radius on server **and** client; diagonal input **slides along** the wall and rounds its finite end (true collide-and-slide, not tunnelling); **Y holds at 1.00 with no planar-pin system** (kinematic + no gravity stays on plane); **server == client**; `CharacterInterpolation` confirmed present on the client ghost and **absent on the server** (variant works). Console clean of CC/Burst/cascade errors — only the known unfocused-editor tick-batching artifact.
 - **Net code simplification.** Deleted `PlayerMoveSystem` + `PlayerPlanarConstraintSystem` (and removed `StatRecomputeSystem`'s `[UpdateBefore(PlayerMoveSystem)]`). The climb-over / rotation-lock / planar-pin workarounds from DR-006 are gone — the kinematic controller handles it natively.
 - **Asmdefs:** `ProjectM.Simulation` and `ProjectM.Authoring` now reference `Unity.CharacterController` (Authoring also `Unity.Physics` for `BakeCharacter`).
 - **Stack:** new dependency `com.unity.charactercontroller@1.4.2` in `manifest.json` / lock; core DOTS versions unchanged.
 ## Open / deferred
 - **Multi-client co-op interpolation not headlessly validated.** Single owner-predicted client is validated; remote interpolation smoothness (and the predicted-only `CharacterInterpolation` variant's effect on a *real* second client) needs a live two-build / thin-client check. The variant is in place per Unity's documented setup; CC 1.4.2 also guards `CharacterInterpolationSystem` to enabled-`Simulate` entities only.
 - **Player-vs-player is non-physical** (`SimulateDynamicBody=false`): kinematic characters don't shove each other. Revisit if mutual push is wanted (set true + handle masses in `OverrideDynamicHitMasses`).
 - **Gravity-free / no floor collider** — planar top-down; if verticality/terrain is added, give the character gravity in the processor + a ground collider and reconsider `SnapToGround`.
 - **CC 1.4.2 declares older package deps** (entities/physics 1.3.15). Re-check on any CC bump; a CC build explicitly targeting Entities 6.x ("1.5+") would be preferable when available.
 - **`KinematicCharacterBody` velocity ghost variant** (replicate `RelativeVelocity`/`IsGrounded` for tighter reconciliation) was left at defaults; add if owner-prediction reconciliation looks jittery under latency.
 Mirrors the server-authoritative + client-prediction + small-co-op pillars from [[Pillars]]. Builds on [[DR-006_M5_Physics_In_Prediction]] (kept infra) and [[DR-005_M4_Connection_Model_Direct_IP]] (spawn/co-op).
@@ -2,6 +2,7 @@
  "dependencies": {
    "com.coplaydev.unity-mcp": "https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#main",
    "com.unity.ai.navigation": "2.0.12",
    "com.unity.charactercontroller": "1.4.2",
    "com.unity.cinemachine": "3.1.6",
    "com.unity.collab-proxy": "2.12.4",
    "com.unity.entities": "6.5.0",
@@ -20,7 +21,7 @@
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    "com.unity.timeline": "1.8.12",
    "com.unity.ugui": "2.6.0",
-    "com.unity.visualeffectgraph": "17.6.0",
+    "com.unity.visualeffectgraph": "17.4.0",
    "com.unity.visualscripting": "1.9.11",
    "com.unity.modules.accessibility": "1.0.0",
    "com.unity.modules.adaptiveperformance": "1.0.0",
@@ -37,6 +37,18 @@
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      "url": "https://packages.unity.com"
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      "version": "1.4.2",
      "depth": 0,
      "source": "registry",
      "dependencies": {
        "com.unity.physics": "1.3.15",
        "com.unity.entities": "1.3.15",
        "com.unity.modules.physics": "1.0.0",
        "com.unity.modules.uielements": "1.0.0"
      },
      "url": "https://packages.unity.com"
    },
    "com.unity.cinemachine": {
      "version": "3.1.6",
      "depth": 0,
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