From 658db6c986355ddeb4a1ef1ce9034630ccf398dc Mon Sep 17 00:00:00 2001
From: Meta Vens <rwvens@hotmail.com>
Date: Tue, 14 Jul 2026 19:39:16 +0100
Subject: [PATCH] Advertise the Box3D ownership boundary

---
 .../YmirServicePublicationDocument.cs         | 33 ++++++++++---------
 .../Ymir.Tests/YmirServicePublicationTests.cs | 16 +++++++++
 2 files changed, 33 insertions(+), 16 deletions(-)

diff --git a/src/Ymir.Core/YmirServicePublicationDocument.cs b/src/Ymir.Core/YmirServicePublicationDocument.cs
index da1d154..0573799 100644
--- a/src/Ymir.Core/YmirServicePublicationDocument.cs
+++ b/src/Ymir.Core/YmirServicePublicationDocument.cs
@@ -1,7 +1,6 @@
 using GameCult.Caching;
 using GameCult.Caching.MessagePack;
 using GameCult.Eve.Surface;
-using CultMath;
 using MessagePack;
 
 namespace Ymir.Core;
@@ -18,7 +17,7 @@ public sealed class YmirProviderAdvertisementDocument
     public string Title { get; set; } = "Ymir Physics";
 
     [Key(2)]
-    public string Description { get; set; } = "GameCult physics/world substrate engine built on CultMath.";
+    public string Description { get; set; } = "GameCult authoritative Box3D session wrapper and physics daemon.";
 
     [Key(3)]
     public string[] Owns { get; set; } = [];
@@ -45,16 +44,16 @@ public sealed class YmirOperatorStateDocument
     public string Status { get; set; } = "mvp";
 
     [Key(2)]
-    public string StateOwner { get; set; } = "Ymir.Core step and query results";
+    public string StateOwner { get; set; } = "Ymir world sessions and typed GameCult projections";
 
     [Key(3)]
-    public string NumericSubstrate { get; set; } = "CultMath";
+    public string NumericSubstrate { get; set; } = "Box3D v0.1.0 (C17)";
 
     [Key(4)]
     public string BatchKernel { get; set; } = "";
 
     [Key(5)]
-    public string Persistence { get; set; } = "CultCache MessagePack directory store for gamecult.ymir.world_state.v1";
+    public string Persistence { get; set; } = "CultCache gamecult.ymir.world_state.v0 legacy checkpoint during Box3D cutover";
 
     [Key(6)]
     public string UpdatedAtUtc { get; set; } = "";
@@ -82,18 +81,20 @@ public static class YmirServicePublication
     {
         ProviderId = "ymir.physics",
         Title = "Ymir Physics",
-        Description = "GameCult physics/world substrate engine built on CultMath.",
+        Description = "GameCult authoritative Box3D session wrapper and physics daemon.",
         Owns =
         [
-            "physics simulation truth",
-            "body integration",
-            "field acceleration",
-            "contact generation",
-            "collision query semantics",
-            "SoA CultCache world-state persistence"
+            "authoritative physics session lifecycle",
+            "stable GameCult id to Box3D handle projection",
+            "typed physics commands and facts",
+            "deterministic result ordering",
+            "CultCache checkpoint reconstruction",
+            "CultMesh and Eve service publication"
         ],
         DoesNotOwn =
         [
+            "physics algorithm invention",
+            "Box3D solver and collision semantics",
             "Unity scene truth",
             "rendering",
             "gameplay damage policy",
@@ -107,10 +108,10 @@ public static class YmirServicePublication
     {
         ProviderId = "ymir.physics",
         Status = "mvp",
-        StateOwner = "Ymir.Core step and query results",
-        NumericSubstrate = "CultMath",
-        BatchKernel = $"CultMath.BatchMath lanes={BatchMath.LaneCount}, hardwareAccelerated={BatchMath.IsHardwareAccelerated}",
-        Persistence = "CultCache MessagePack directory store for gamecult.ymir.world_state.v1",
+        StateOwner = "Ymir world sessions and typed GameCult projections",
+        NumericSubstrate = "Box3D v0.1.0 (C17)",
+        BatchKernel = "Box3D native solver; Ymir does not own physics algorithms",
+        Persistence = "CultCache gamecult.ymir.world_state.v0 legacy checkpoint during Box3D cutover",
         UpdatedAtUtc = FormatUtc(now)
     };
 
diff --git a/tests/Ymir.Tests/YmirServicePublicationTests.cs b/tests/Ymir.Tests/YmirServicePublicationTests.cs
index 5aedbac..a6a4d93 100644
--- a/tests/Ymir.Tests/YmirServicePublicationTests.cs
+++ b/tests/Ymir.Tests/YmirServicePublicationTests.cs
@@ -7,6 +7,22 @@ namespace Ymir.Tests;
 
 public sealed class YmirServicePublicationTests
 {
+    [Fact]
+    public void PublicationAdvertisesBox3DOwnershipBoundary()
+    {
+        var now = DateTimeOffset.Parse("2026-07-14T12:00:00Z");
+
+        var advertisement = YmirServicePublication.ProviderAdvertisement(now);
+        var diagnostics = YmirServicePublication.OperatorState(now);
+
+        Assert.Contains("Box3D", advertisement.Description, StringComparison.Ordinal);
+        Assert.Contains("authoritative physics session lifecycle", advertisement.Owns);
+        Assert.Contains("Box3D solver and collision semantics", advertisement.DoesNotOwn);
+        Assert.Equal("Box3D v0.1.0 (C17)", diagnostics.NumericSubstrate);
+        Assert.Contains("does not own physics algorithms", diagnostics.BatchKernel, StringComparison.Ordinal);
+        Assert.Contains("world_state.v0", diagnostics.Persistence, StringComparison.Ordinal);
+    }
+
     [Fact]
     public void EveSurfaceUsesCanonicalDocumentAndOperatorMetrics()
     {