test: remove vacuous diagnostic assertions

tests/AcDream.Core.Tests/Physics/CellarLipWedgeTests.cs

@@ -71,10 +71,11 @@ public class CellarLipWedgeTests
 
     /// <summary>
     /// Diagnostic: drive the player off the threshold toward the cottage and
-    /// dump the trajectory + indoor-BSP/step probes. Always passes; the
-    /// captured stdout shows exactly what the engine does each tick.
+    /// dump the trajectory + indoor-BSP/step probes. The captured artifact
+    /// shows exactly what the engine does each tick; this is not a verdict test.
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_DriveOffThreshold_DumpTrajectory()
     {
         PhysicsDiagnostics.ProbeResolveEnabled    = true;
@@ -96,7 +97,6 @@ public class CellarLipWedgeTests
                     $"tick={p.Tick} pos=({p.Position.X:F4},{p.Position.Y:F4},{p.Position.Z:F4}) " +
                     $"cell=0x{p.CellId:X8} onGround={p.IsOnGround} cpValid={p.CpValid}")) +
                 "\n\nPROBES:\n" + probeLines);
-            Assert.True(true);
         }
         finally
         {
@@ -284,9 +284,11 @@ public class CellarLipWedgeTests
     /// <summary>
     /// Diagnostic: replay every captured wedge record and report advance% — to
     /// confirm the lip-cell engine reproduces the live stuck (0% advance) before
-    /// asserting a fix. Always passes; results in the message + %TEMP% file.
+    /// asserting a fix. Results are written to a %TEMP% artifact; this is not
+    /// a verdict test.
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_ReplayLiveWedgeRecords_Advance()
     {
         var recs = LoadWedgeRecords();
@@ -302,7 +304,6 @@ public class CellarLipWedgeTests
                       $"res=({res.X:F2},{res.Y:F2},{res.Z:F2})");
         }
         File.WriteAllText(Path.Combine(Path.GetTempPath(), "lip-wedge-replay.log"), string.Join("\n", lines));
-        Assert.True(true, string.Join("\n", lines.Take(10)));
     }
 
     /// <summary>
@@ -310,6 +311,7 @@ public class CellarLipWedgeTests
     /// probes on, capturing why the step-up fails. Output to %TEMP%/lip-wedge-stepup.log.
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_ReplayFloorCpRecord_StepUpProbes()
     {
         var rec = LoadWedgeRecords().First(r => r.BodyBefore is not null
@@ -328,7 +330,6 @@ public class CellarLipWedgeTests
                 $"record cur=({rec.Input.CurrentPos.X:F4},{rec.Input.CurrentPos.Y:F4},{rec.Input.CurrentPos.Z:F4}) " +
                 $"tgt=({rec.Input.TargetPos.X:F4},{rec.Input.TargetPos.Y:F4},{rec.Input.TargetPos.Z:F4}) " +
                 $"req={req:F3} adv={adv:F3} res=({res.X:F4},{res.Y:F4},{res.Z:F4})\n\n" + sw.ToString());
-            Assert.True(true);
         }
         finally
         {

tests/AcDream.Core.Tests/Physics/CellarUpTrajectoryReplayTests.cs

@@ -292,6 +292,7 @@ public class CellarUpTrajectoryReplayTests : IDisposable
     /// what the harness is actually doing.
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Harness_DiagnosticDump_FirstTenTicks()
     {
         PhysicsDiagnostics.ProbeResolveEnabled    = true;
@@ -308,11 +309,7 @@ public class CellarUpTrajectoryReplayTests : IDisposable
                 string.Join("\n  ", trajectory.Select(p =>
                     $"tick={p.Tick} pos=({p.Position.X:F4},{p.Position.Y:F4},{p.Position.Z:F4}) " +
                     $"cell=0x{p.CellId:X8} onGround={p.IsOnGround} cpValid={p.CpValid}"));
-
-            // Always pass — this is a diagnostic test; the probe
-            // output appears in the test runner's captured stdout
-            // and the trajectory in the assertion message on failure.
-            Assert.True(true, msg);
+            Console.WriteLine(msg);
         }
         finally
         {
@@ -330,6 +327,7 @@ public class CellarUpTrajectoryReplayTests : IDisposable
     /// the cellar floor.
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Harness_DiagnosticDump_NoBodySeed()
     {
         PhysicsDiagnostics.ProbeResolveEnabled = true;
@@ -368,8 +366,7 @@ public class CellarUpTrajectoryReplayTests : IDisposable
                 string.Join("\n  ", trajectory.Select(p =>
                     $"tick={p.Tick} pos=({p.Position.X:F4},{p.Position.Y:F4},{p.Position.Z:F4}) " +
                     $"onGround={p.IsOnGround}"));
-
-            Assert.True(true, msg);
+            Console.WriteLine(msg);
         }
         finally
         {

tests/AcDream.Core.Tests/Physics/DoorCollisionApparatusTests.cs

@@ -203,6 +203,7 @@ public class DoorCollisionApparatusTests
     /// without yielding a green/red verdict.
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Apparatus_DiagnosticDump_FrontApproach()
     {
         if (!TryBuildScenario(out var ctx)) Assert.Fail("Lane=InstalledDat requires an installed retail DAT directory; see docs/release-gate.md.");
@@ -236,7 +237,6 @@ public class DoorCollisionApparatusTests
                 isOnGround = result.IsOnGround;
             }
 
-            Assert.True(true, "Diagnostic test — always passes; check stdout.");
         }
         finally
         {