test: classify prerequisite lanes and own Avalonia sessions

tests/AcDream.App.Tests/Credentials/AppCredentialResolverTests.cs

@@ -131,6 +131,7 @@ public sealed class AppCredentialResolverTests
     }
 
     [Fact]
+    [Trait("Lane", "Linux")]
     public void LinuxRejectsGroupOrOtherCredentialPermissions()
     {
         if (!OperatingSystem.IsLinux())

tests/AcDream.App.Tests/Rendering/ChargenPreviewEntityBuilderTests.cs

@@ -20,6 +20,7 @@ namespace AcDream.App.Tests.Rendering;
 /// is resolving Setup/GfxObj/Surface/Animation dat data that
 /// <see cref="DollEntityBuilder"/> receives pre-resolved).
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChargenPreviewEntityBuilderTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/Rendering/CornerFloodReplayTests.cs

@@ -198,6 +198,7 @@ public class CornerFloodReplayTests
     /// exact gate that flips.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Diagnostic_TraceGoodVsGlitchStep()
     {
         var datDir = ResolveDatDir();
@@ -266,6 +267,7 @@ public class CornerFloodReplayTests
     /// transition background strobe). Guards the ApplyReciprocalClip pipeline.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void CornerSweep_FloodIsCompleteAndMonotone()
     {
         var datDir = ResolveDatDir();
@@ -363,6 +365,7 @@ public class CornerFloodReplayTests
     /// the tripwire count stays 0.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void PortalPlaneCrossings_InPlacePropagationConverges()
     {
         var datDir = ResolveDatDir();
@@ -433,6 +436,7 @@ public class CornerFloodReplayTests
     /// stays 0 across every Build.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InCellDirectionSweep_InPlacePropagationConverges()
     {
         var datDir = ResolveDatDir();
@@ -495,6 +499,7 @@ public class CornerFloodReplayTests
     /// the collapsing intersection.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Diagnostic_Hop2Microscope()
     {
         var datDir = ResolveDatDir();
@@ -625,6 +630,7 @@ public class CornerFloodReplayTests
     /// 0171/0173 — the screen area where the player stands then shows background.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Diagnostic_CornerPress_FloodAcrossDoorwayPlane()
     {
         var datDir = ResolveDatDir();

tests/AcDream.App.Tests/Rendering/FramePacingControllerTests.cs

@@ -119,6 +119,7 @@ public sealed class FramePacingControllerTests
     }
 
     [Fact]
+    [Trait("Lane", "Windows")]
     public void Windows_high_resolution_timer_arms_and_disposes_its_handle()
     {
         if (!OperatingSystem.IsWindowsVersionAtLeast(10, 0, 17134))

tests/AcDream.App.Tests/Rendering/HouseExitWalkReplayTests.cs

@@ -49,6 +49,7 @@ namespace AcDream.App.Tests.Rendering;
 /// OutsideView ⇒ outdoor dynamics trivially cone-pass).
 /// </summary>
 [Collection(CameraDiagnosticsCollection.Name)]
+[Trait("Lane", "InstalledDat")]
 public class HouseExitWalkReplayTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/Rendering/Issue113DrawingBspFilterTests.cs

@@ -19,6 +19,7 @@ namespace AcDream.App.Tests.Rendering;
 /// iterated the dictionary and drew the "phantom staircase". These pins hold
 /// ObjectMeshManager.CollectDrawingBspPolygonIds to the dat facts.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue113DrawingBspFilterTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/Rendering/Issue113MeetingHallFloodTests.cs

@@ -29,6 +29,7 @@ namespace AcDream.App.Tests.Rendering;
 /// production assembler from the user's click-time viewpoint and pins which
 /// hall cells draw and with what clip.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue113MeetingHallFloodTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/Rendering/Issue120ReciprocalPingPongTests.cs

@@ -34,6 +34,7 @@ namespace AcDream.App.Tests.Rendering;
 /// contained polygons, which makes union growth strictly area-increasing and
 /// the flood convergent regardless of clip-numerics drift.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue120ReciprocalPingPongTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/Rendering/Issue124LookInSeedRegionTests.cs

@@ -18,6 +18,7 @@ namespace AcDream.App.Tests.Rendering;
 /// seedRegion parameter — the port of that installed-view clip — against the
 /// real Holtburg corner-building door.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue124LookInSeedRegionTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/Rendering/Issue130DoorwayStripTests.cs

@@ -38,6 +38,7 @@ namespace AcDream.App.Tests.Rendering;
 /// cut). Fixed by the conservative NdcScissorRect bound; the assertions below
 /// pin both properties.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue130DoorwayStripTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/Rendering/Issue131SetupProbeTests.cs

@@ -15,6 +15,7 @@ namespace AcDream.App.Tests.Rendering;
 /// translucent swirl; lamp posts / creatures / signs identify by part shape.
 /// </summary>
 [Trait("Purpose", "Diagnostic")]
+[Trait("Lane", "InstalledDat")]
 public class Issue131SetupProbeTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/Rendering/Issue176177FacilityHubFloodReplayTests.cs

@@ -33,6 +33,7 @@ namespace AcDream.App.Tests.Rendering;
 ///  D. #176 walk — eye tracks down the corridor across two seams, gaze
 ///     locked +X: per-step admitted-set diffs (drop-for-one-step churn).
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue176177FacilityHubFloodReplayTests
 {
     private const uint FacilityHub = 0x8A020000u;

tests/AcDream.App.Tests/Rendering/Issue177StairDescentCameraFloodTests.cs

@@ -32,6 +32,7 @@ namespace AcDream.App.Tests.Rendering;
 /// admitted, the flood is exonerated and the artifact lives downstream.
 /// </summary>
 [Collection(CameraDiagnosticsCollection.Name)]
+[Trait("Lane", "InstalledDat")]
 public class Issue177StairDescentCameraFloodTests
 {
     private const uint FacilityHub = 0x8A020000u;

tests/AcDream.App.Tests/Rendering/Issue181VisFlapReplayTests.cs

@@ -22,6 +22,7 @@ namespace AcDream.App.Tests.Rendering;
 /// axis; ANY admitted-set difference at sub-mm perturbation is the #181
 /// instability, and the symmetric difference names the flapping cell.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue181VisFlapReplayTests
 {
     private const uint FacilityHub = 0x8A020000u;

tests/AcDream.App.Tests/Rendering/Issue181WallPressEquilibriumTests.cs

@@ -33,6 +33,7 @@ namespace AcDream.App.Tests.Rendering;
 /// </summary>
 [Collection(CameraDiagnosticsCollection.Name)]
 [Trait("Purpose", "Diagnostic")]
+[Trait("Lane", "InstalledDat")]
 public class Issue181WallPressEquilibriumTests
 {
     private const uint FacilityHubLandblock = 0x8A020000u;

tests/AcDream.App.Tests/Rendering/Issue95DungeonFloodDiagnosticTests.cs

@@ -25,6 +25,7 @@ namespace AcDream.App.Tests.Rendering;
 /// root's stab_list size (<see cref="LoadedCell.VisibleCells"/>), plus how many visited cells
 /// cross landblocks. The single assertion just guarantees the test ran; the VALUE is the output.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue95DungeonFloodDiagnosticTests
 {
     private const uint TownNetwork = 0x00070000u;

tests/AcDream.App.Tests/Rendering/LinuxMonotonicFramePacingWaiterTests.cs

@@ -48,6 +48,7 @@ public sealed class LinuxMonotonicFramePacingWaiterTests
     }
 
     [Fact]
+    [Trait("Lane", "Linux")]
     public void LinuxWaitBlocksUntilRequestedMonotonicDeadline()
     {
         if (!OperatingSystem.IsLinux())
@@ -70,6 +71,7 @@ public sealed class LinuxMonotonicFramePacingWaiterTests
     }
 
     [Fact]
+    [Trait("Lane", "Linux")]
     public void LinuxWaiterRejectsUseAfterDisposal()
     {
         if (!OperatingSystem.IsLinux())

tests/AcDream.App.Tests/Rendering/PortalTunnelAssetTests.cs

@@ -52,6 +52,7 @@ public sealed class PortalTunnelAssetTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledDat_ResolvesRetailPortalSetupAndAnimation()
     {
         string? datDir = ResolveDatDir();

tests/AcDream.App.Tests/Rendering/RetailParticleGeometryClassifierTests.cs

@@ -206,6 +206,7 @@ public sealed class RetailParticleGeometryClassifierTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledArmorSelfShieldPieces_areModeOneMeshesWithAuthoredApexFaces()
     {
         string? datDir = ResolveDatDir();
@@ -264,6 +265,7 @@ public sealed class RetailParticleGeometryClassifierTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledHumanEffectTable_MapsPortalVisibilityScripts()
     {
         string? datDir = ResolveDatDir();
@@ -278,6 +280,7 @@ public sealed class RetailParticleGeometryClassifierTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledAerlintheSwarmEmitter_UsesItsHardwareGfxDegradeDistance()
     {
         string? datDir = ResolveDatDir();

tests/AcDream.App.Tests/Rendering/RetailSelectionAssetTests.cs

@@ -16,6 +16,7 @@ namespace AcDream.App.Tests.Rendering;
 public sealed class RetailSelectionAssetTests
 {
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledDat_ResolvesAllTwelveVividTargetImages()
     {
         string datDir = ResolveDatDir();
@@ -58,6 +59,7 @@ public sealed class RetailSelectionAssetTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void DoorSelectionGeometry_UsesDrawingBspRootSphereAndDatPolygonOrder()
     {
         const uint doorGfxObjId = 0x010044B5u;

tests/AcDream.App.Tests/Streaming/LandblockBuildFactoryTests.cs

@@ -318,6 +318,7 @@ public sealed class LandblockBuildFactoryTests
     }
 
     [Fact]
+    [Trait("Lane", "PreparedPackage")]
     public void InstalledDatNearBuild_IsDeterministicAndClosesEntityPhysicsPayload()
     {
         string? datDirectory = ResolveDatDirectory();

tests/AcDream.App.Tests/UI/IconComposerTests.cs

@@ -75,6 +75,7 @@ public class IconComposerTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void ResolveUnderlayDid_goldenValues_matchDat()
     {
         var datDir = ResolveDatDir();
@@ -103,6 +104,7 @@ public class IconComposerTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void ResolveEffectDid_goldenValues_matchDat()
     {
         var datDir = ResolveDatDir();
@@ -128,6 +130,7 @@ public class IconComposerTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void TryGetEffectTile_noEffectBlack_magicalTextured()
     {
         var datDir = ResolveDatDir();

tests/AcDream.App.Tests/UI/Layout/CharacterLayoutImportProbe.cs

@@ -11,6 +11,7 @@ using Xunit;
 
 namespace AcDream.App.Tests.UI.Layout;
 
+[Trait("Lane", "InstalledDat")]
 public sealed class CharacterLayoutImportProbe
 {
     private const uint CharacterLayout = 0x2100002Eu;

tests/AcDream.App.Tests/UI/Layout/ChatIndicatorButtonLiveMountProbeTests.cs

@@ -54,6 +54,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// see its own class doc) are unaffected.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChatIndicatorButtonLiveMountProbeTests
 {
     [Fact]

tests/AcDream.App.Tests/UI/Layout/ChatOptionsDatDefaultsTests.cs

@@ -16,6 +16,7 @@ namespace AcDream.App.Tests.UI.Layout;
 public sealed class ChatOptionsDatDefaultsTests
 {
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledDat_ResolvesTheByteVerifiedSliderDefaults()
     {
         string datDir = ResolveDatDir();

tests/AcDream.App.Tests/UI/Layout/FaPanelSlotProbeTests.cs

@@ -15,6 +15,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// and 0x10000263 (swear-allegiance button). Env-gated like the other probes.
 /// </summary>
 [Trait("Purpose", "Diagnostic")]
+[Trait("Lane", "InstalledDat")]
 public sealed class FaPanelSlotProbeTests
 {
     [Fact]

tests/AcDream.App.Tests/UI/Layout/InventoryFrameImportProbe.cs

@@ -18,6 +18,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// backdrop (ZLevel 100 → ≈ −1,000,000), and the backdrop washed out the panels' captions,
 /// burden meter, and item cells. Skips when the live dat directory is absent (CI).
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class InventoryFrameImportProbe
 {
     private const uint Frame          = 0x21000023u;

tests/AcDream.App.Tests/UI/Layout/ItemAppraisalTextFormatterTests.cs

@@ -749,6 +749,7 @@ public sealed class ItemAppraisalTextFormatterTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void EndOfRetailDatNameResolver_LoadsMaterialAndCreatureNames()
     {
         string? datDirectory = ResolveDatDirectory();

tests/AcDream.App.Tests/UI/Layout/ItemListCellTemplateTests.cs

@@ -15,6 +15,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// square 0x060074CF. Also PRINTS the resolved ids — the "pin the exact asset" record.
 /// Skips when the live dat directory is absent (CI).
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class ItemListCellTemplateTests
 {
     private const uint Generic = 0x060074CFu;   // generic toolbar-shortcut empty square (the bug)

tests/AcDream.App.Tests/UI/Layout/KeyboardConfigLiveMountProbeTests.cs

@@ -16,6 +16,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// rect + caption evidence for each observation. Env-gated like the other
 /// live probes so CI/dat-less runs skip it.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class KeyboardConfigLiveMountProbeTests
 {
     [Fact]

tests/AcDream.App.Tests/UI/Layout/MapHousePanelSlotProbeTests.cs

@@ -26,6 +26,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// </para>
 /// </summary>
 [Trait("Purpose", "Diagnostic")]
+[Trait("Lane", "InstalledDat")]
 public sealed class MapHousePanelSlotProbeTests
 {
     private const uint HostLayoutId = 0x2100006Eu;

tests/AcDream.App.Tests/UI/Layout/OptionsPanelLiveMountProbeTests.cs

@@ -16,6 +16,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// page controller actually resolves. Env-gated like the fixture
 /// generator so CI/dat-less runs skip it.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class OptionsPanelLiveMountProbeTests
 {
     [Fact]

tests/AcDream.App.Tests/UI/Layout/PaperdollClickMapTests.cs

@@ -45,6 +45,7 @@ public sealed class PaperdollClickMapTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void LiveDat_resolvesRetailClickMapAndAllNineBodyRegions()
     {
         string datDir = Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")

tests/AcDream.App.Tests/UI/Layout/PaperdollSlotBackgroundTests.cs

@@ -47,6 +47,7 @@ public class PaperdollSlotBackgroundTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Live_dat_resolves_all_pinned_retail_backgrounds()
     {
         string datDir = Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")

tests/AcDream.App.Tests/UI/Layout/PowerbarLayoutProbeTests.cs

@@ -15,6 +15,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// INSTALLED DAT, so the "Height"/"Power"/"Accuracy" fix binds exactly what
 /// retail authors instead of guessing.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class PowerbarLayoutProbeTests
 {
     [Fact]

tests/AcDream.App.Tests/UI/Layout/SocialPanelLiveMountProbeTests.cs

@@ -18,6 +18,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// its button→page pairing + default entry can be recorded — coordinator
 /// addendum, docs/research/2026-08-11-fa-panel-structure.md §10.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class SocialPanelLiveMountProbeTests
 {
     [Fact]

tests/AcDream.App.Tests/UI/Layout/SpellbookRowStyleTests.cs

@@ -4,6 +4,7 @@ using DatReaderWriter.Options;
 
 namespace AcDream.App.Tests.UI.Layout;
 
+[Trait("Lane", "InstalledDat")]
 public sealed class SpellbookRowStyleTests
 {
     [Fact]

tests/AcDream.App.Tests/UI/RetailCursorCatalogTests.cs

@@ -24,6 +24,7 @@ public sealed class RetailCursorCatalogTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void WindowControlCursorSpecs_resolveGoldenDatSurfaces()
     {
         string? datDir = ResolveDatDir();
@@ -82,6 +83,7 @@ public sealed class RetailCursorCatalogTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void ReachableGlobalCursorSpecs_resolveGoldenDatSurfaces()
     {
         string? datDir = ResolveDatDir();

tests/AcDream.App.Tests/UI/SpewBoxLayoutDumpDiagnostic.cs

@@ -76,6 +76,7 @@ namespace AcDream.App.Tests.UI;
 /// </para>
 /// </summary>
 [Trait("Purpose", "Diagnostic")]
+[Trait("Lane", "InstalledDat")]
 public sealed class SpewBoxLayoutDumpDiagnostic
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.App.Tests/UI/UiDatFontBorderPixelTests.cs

@@ -35,6 +35,7 @@ public sealed class UiDatFontBorderPixelTests
     [InlineData(0x40000001u, 4u, 4u)]   // 18px bold serif — SpewBox face (round 4)
     [InlineData(0x40000002u, 3u, 3u)]   // 14px bold serif
     [InlineData(0x40000025u, 3u, 3u)]   // 11px — the pre-round-4 SpewBox placeholder face
+    [Trait("Lane", "InstalledDat")]
     public void RealDatFont_HasExpectedBorderPixels(uint fontId, uint expectedHorizontal, uint expectedVertical)
     {
         string? datDir = ResolveDatDir();
@@ -49,6 +50,7 @@ public sealed class UiDatFontBorderPixelTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void RealDatFont_EveryFontWithABackgroundAtlas_HasANonZeroBorder()
     {
         // docs/research/2026-08-10-retail-ui-text-style.md §1.2: "every font that

tests/AcDream.App.Tests/UI/UiRenderContextAlphaTests.cs

@@ -237,6 +237,7 @@ public sealed class UiRenderContextAlphaTests
     // -- DrawString (BitmapFont path): the same alpha chokepoint, guarded ---
 
     [Fact]
+    [Trait("Lane", "SystemFont")]
     public void FullOpacity_DrawString_BitmapFontPath_MatchesRequestedAlpha_Identity()
     {
         // CH6c review NIT: DrawStringDat (retail dat-font glyphs) had its own
@@ -258,6 +259,7 @@ public sealed class UiRenderContextAlphaTests
     }
 
     [Fact]
+    [Trait("Lane", "SystemFont")]
     public void HalfOpacityWindow_MultipliesBitmapFontGlyphAlpha()
     {
         var device = new RecordingGpuDevice();

tests/AcDream.App.Tests/World/LiveEntityPresentationControllerTests.cs

@@ -145,6 +145,7 @@ public sealed class LiveEntityPresentationControllerTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void SpellRecall_HiddenAndUnHide_RetireMagicTimelineThroughController()
     {
         const uint humanSetup = 0x02000001u;

tests/AcDream.App.Tests/World/RecallTeleportAnimationTests.cs

@@ -185,6 +185,7 @@ public sealed class RecallTeleportAnimationTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledRecall_HiddenEnterWorldPublishesFinishedCyclicPoseWithoutAdvancingTime()
     {
         string datDir = @"C:\Turbine\Asheron's Call";

tests/AcDream.Bake.Tests/BakeDeterminismTests.cs

@@ -15,6 +15,7 @@ namespace AcDream.Bake.Tests;
 /// are absent (CI), same convention as
 /// tests/AcDream.Core.Tests/Conformance/DatConcurrencyStressTests.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class BakeDeterminismTests : IDisposable {
     private readonly List<string> _tempFiles = new();
 

tests/AcDream.Content.Tests/Ap155StaticSpherePopulationMeasurementTests.cs

@@ -23,6 +23,7 @@ namespace AcDream.Content.Tests;
 /// of the 3,605 "sphere-only, no cylinder" Setups the reachability sweep
 /// already counted fall into exactly that trap.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Ap155StaticSpherePopulationMeasurementTests
 {
     [Fact]

tests/AcDream.Content.Tests/CharGen/ChargenAppearanceCatalogColorTests.cs

@@ -22,6 +22,7 @@ namespace AcDream.Content.Tests.CharGen;
 /// <c>ChargenAppearanceCatalogInstalledDatTests</c>): returns green with a
 /// console SKIP note when no installed dat directory is configured.</para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChargenAppearanceCatalogColorTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Content.Tests/CharGen/ChargenAppearanceCatalogInstalledDatTests.cs

@@ -28,6 +28,7 @@ namespace AcDream.Content.Tests.CharGen;
 /// consistent with the rest of the suite rather than introducing a new
 /// convention.</para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChargenAppearanceCatalogInstalledDatTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Content.Tests/CharGen/ChargenTableReaderInstalledDatTests.cs

@@ -14,6 +14,7 @@ namespace AcDream.Content.Tests.CharGen;
 /// cleanly (with a console note) when no DAT directory is configured,
 /// matching e.g. <c>PakEquivalenceTests</c> / <c>RetailDatLoaderTests</c>.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChargenTableReaderInstalledDatTests
 {
     // ACE ACE.Entity.Enum.HeritageGroup — the four heritages CC1's spec

tests/AcDream.Content.Tests/InstalledPreparedCollisionCatalogTests.cs

@@ -4,6 +4,7 @@ using DatReaderWriter.Options;
 
 namespace AcDream.Content.Tests;
 
+[Trait("Lane", "PreparedPackage")]
 public sealed class InstalledPreparedCollisionCatalogTests
 {
     [Fact]

tests/AcDream.Content.Tests/InstalledSetupBspPrimitiveDispatchTests.cs

@@ -33,6 +33,7 @@ namespace AcDream.Content.Tests;
 /// predicate used here.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class InstalledSetupBspPrimitiveDispatchTests
 {
     // EXTERNAL constants. The four bucket controls are the ones already

tests/AcDream.Content.Tests/InstalledSetupCollisionReachabilityTests.cs

@@ -12,6 +12,7 @@ namespace AcDream.Content.Tests;
 /// asserts no such Setup exists, so the deletion cannot remove collision from
 /// any real object.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class InstalledSetupCollisionReachabilityTests
 {
     // Positive controls. These are EXTERNAL constants, measured on 2026-08-06

tests/AcDream.Content.Tests/Issue334NeftetFormationCellMembershipTests.cs

@@ -42,6 +42,7 @@ namespace AcDream.Content.Tests;
 /// columns 0..4 on both axes.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue334NeftetFormationCellMembershipTests
 {
     private const uint NeftetLandblock = 0x87640000u;

tests/AcDream.Content.Tests/PakEquivalenceTests.cs

@@ -20,6 +20,7 @@ namespace AcDream.Content.Tests;
 /// Skips cleanly when the real dats are absent (CI), matching
 /// DatConcurrencyStressTests' convention.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class PakEquivalenceTests {
     // Known-tricky GfxObj ids reused from existing conformance fixtures:
     // 0x010002B4 / 0x010008A8 — #119 "[up-null] upload returned null" dump

tests/AcDream.Content.Tests/SolidColorTextureCacheTests.cs

@@ -17,6 +17,7 @@ namespace AcDream.Content.Tests;
 /// construct (its ctor builds a RetailPhysicsScriptLoader from dats.Portal).
 /// Skips cleanly when dats are absent, matching ContentConformanceDats convention.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class SolidColorTextureCacheTests {
     [Fact]
     public void GetOrCreateSolidColorTexture_SameColor_ReturnsSameSharedArray() {

tests/AcDream.Content.Tests/Spells/RetailSpellMetadataProjectorTests.cs

@@ -73,6 +73,7 @@ public sealed class RetailSpellMetadataProjectorTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Load_EndOfRetailDat_ResolvesEveryLateLearnedSpellMissingFromCsv()
     {
         string? datDir = ResolveDatDir();
@@ -101,6 +102,7 @@ public sealed class RetailSpellMetadataProjectorTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Load_EndOfRetailDat_UsesRetailFormulaTargetsInsteadOfLegacyExportMasks()
     {
         string? datDir = ResolveDatDir();

tests/AcDream.Content.Tests/Vfx/RetailDatLoaderTests.cs

@@ -432,6 +432,7 @@ public sealed class RetailDatLoaderTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledBlockingScripts_ParseThroughRetailShape_WhenDatsAvailable()
     {
         string? datDir = ResolveDatDirectory();

tests/AcDream.Core.Net.Tests/LiveHandshakeTests.cs

@@ -29,6 +29,7 @@ namespace AcDream.Core.Net.Tests;
 /// the env-var setup are distinguishable from server errors.
 /// </para>
 /// </summary>
+[Trait("Lane", "Live")]
 public class LiveHandshakeTests
 {
     [Fact]

tests/AcDream.Core.Tests/Audio/EnvCellSoundEmitterInventoryTests.cs

@@ -38,6 +38,7 @@ namespace AcDream.Core.Tests.Audio;
 /// absent.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class EnvCellSoundEmitterInventoryTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Audio/UiSoundTableResolutionTests.cs

@@ -38,6 +38,7 @@ namespace AcDream.Core.Tests.Audio;
 /// installed-dat test in this suite.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class UiSoundTableResolutionTests
 {
     /// <summary>

tests/AcDream.Core.Tests/Conformance/CottageDoorwayCharacterizationTests.cs

@@ -15,6 +15,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// not the master plan's loose "0031↔0170↔0171". The cottage cellar is the
 /// 0x014x range (#98 fixtures); the doorway room/vestibule is in 0x017x.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class CottageDoorwayCharacterizationTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/DatConcurrencyStressTests.cs

@@ -39,6 +39,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// (e.g. dispose-during-read at teardown) or layers above the dat reader.
 /// </summary>
 [Trait("Category", "Conformance")]
+[Trait("Lane", "InstalledDat")]
 public class DatConcurrencyStressTests
 {
     private const int HammerThreads = 8;

tests/AcDream.Core.Tests/Conformance/DungeonLandblockDatProbeTests.cs

@@ -17,6 +17,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// LandBlockInfo + EnvCells? Output-only — no assertions.
 /// </summary>
 [Trait("Purpose", "Diagnostic")]
+[Trait("Lane", "InstalledDat")]
 public sealed class DungeonLandblockDatProbeTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/FindCellListConformanceTests.cs

@@ -30,6 +30,7 @@ public class FindCellListConformanceTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void FindCellList_DeepInsideRoom0171_Returns0171()
     {
         var datDir = ConformanceDats.ResolveDatDir();
@@ -47,6 +48,7 @@ public class FindCellListConformanceTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void FindCellList_DeepInsideVestibule0170_Returns0170()
     {
         var datDir = ConformanceDats.ResolveDatDir();
@@ -70,6 +72,7 @@ public class FindCellListConformanceTests
     /// property P1 must preserve.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void FindCellList_InVestibule_SeededFromRoom_Returns0170()
     {
         var datDir = ConformanceDats.ResolveDatDir();

tests/AcDream.Core.Tests/Conformance/HoltburgTorchFalloffProbeTests.cs

@@ -21,6 +21,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// separately in the decomp). Output-only — no assertions; read the log.
 /// </summary>
 [Trait("Purpose", "Diagnostic")]
+[Trait("Lane", "InstalledDat")]
 public sealed class HoltburgTorchFalloffProbeTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/Issue107SpawnDiagnosticTests.cs

@@ -27,6 +27,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// find_visible_child_cell also cannot recover a cross-building claim and
 /// falls to seen_outside → adjust_to_outside, acclient :280037).
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue107SpawnDiagnosticTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/Issue112MembershipTests.cs

@@ -19,6 +19,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// (pc:308788-308825). These tests pin the replacement semantics against the
 /// real dats.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue112MembershipTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/Issue113DoorVanishDiagnosticTests.cs

@@ -21,6 +21,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// carry polygon references in properties the walk missed (portal-type
 /// nodes / leaf subclasses)? Pure diagnostic — no production code.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue113DoorVanishDiagnosticTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/Issue113PhantomStairsDumpTests.cs

@@ -24,6 +24,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// interior cell's Position + world AABB + SeenOutside flag + stair signature
 /// (distinct horizontal-face heights), and containment of the two key points.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue113PhantomStairsDumpTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/Issue119TowerDumpTests.cs

@@ -24,6 +24,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// static object (id + position) — the barrel candidate and the stair
 /// owners read directly off the output.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue119TowerDumpTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/Issue119UpNullGfxObjDumpTests.cs

@@ -23,6 +23,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// ObjectMeshManager in MP1a)
 /// so the zeroing gate reads directly off the output.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue119UpNullGfxObjDumpTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/StipplingSurfaceEquivalenceTests.cs

@@ -30,6 +30,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// Violations of (b) on PLAIN OBJECT GfxObjs are allowed — retail's bypass
 /// draws solid batches for non-building/non-cell meshes, and so do we.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class StipplingSurfaceEquivalenceTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/ThresholdDivergenceDiagnosticTests.cs

@@ -14,6 +14,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// (real pick-criterion divergence vs a test/sphere artifact).
 /// </summary>
 [Trait("Purpose", "Diagnostic")]
+[Trait("Lane", "InstalledDat")]
 public class ThresholdDivergenceDiagnosticTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Conformance/ThresholdPortalCrossingReplayTests.cs

@@ -27,6 +27,7 @@ namespace AcDream.Core.Tests.Conformance;
 /// building-cell cache. The outdoor-involving segments (0031↔0170) need the landcell +
 /// building portal and are a follow-up.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class ThresholdPortalCrossingReplayTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Input/RetailActionIdentityRoundTripTests.cs

@@ -54,6 +54,7 @@ namespace AcDream.Core.Tests.Input;
 /// here. Reported, not silently resolved either way.</description></item>
 /// </list>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class RetailActionIdentityRoundTripTests
 {
     /// <summary>Actions with a citation-backed, pre-existing reason their DAT-union

tests/AcDream.Core.Tests/Input/RetailActionMapReaderTests.cs

@@ -204,6 +204,7 @@ public sealed class RetailActionMapReaderTests
 /// <summary>Live-DAT conformance: pins the exact shape of the installed
 /// <c>client_portal.dat</c>/<c>client_local_English.dat</c> ActionMap +
 /// MasterInputMap objects. Skips cleanly when the dats are unavailable.</summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class RetailActionMapReader_LiveDatTests
 {
     [Fact]

tests/AcDream.Core.Tests/Physics/Ap157SortingSphereFloodMeasurementTests.cs

@@ -59,6 +59,7 @@ namespace AcDream.Core.Tests.Physics;
 /// the flood-sphere list, not a subset or approximation of it.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Ap157SortingSphereFloodMeasurementTests
 {
     /// <summary>Arbitrary non-zero landblock id — only its prefix matters for

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

@@ -189,6 +189,7 @@ public sealed class BoxIntersectsCellBspDifferentialTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledDat_RandomizedBoxSweepOverEnvCellContainmentBsps_HasZeroMismatch()
     {
         string? datDirectory = ConformanceDats.ResolveDatDir();

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

@@ -38,6 +38,7 @@ namespace AcDream.Core.Tests.Physics;
 /// L20104 / L20224 / L20386 (door-exit) + L23035 / L81340 / L87958 (corner press);
 /// pivot = player + (0,0,1.5) per RetailChaseCamera.PivotHeight.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class CameraCornerSealReplayTests
 {
     private readonly ITestOutputHelper _out;

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

@@ -263,6 +263,7 @@ public sealed class CellTransitFindTransitCellsBoxTests
     /// for the exact counts from this run.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledDat_RandomizedPartSweepNearRealPortals_PostFixMembershipIsSubsetOfPreFix()
     {
         string? datDirectory = ConformanceDats.ResolveDatDir();

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

@@ -28,6 +28,7 @@ namespace AcDream.Core.Tests.Physics;
 /// semantics on real Holtburg dat geometry.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class CellTransitTests
 {
     [Fact]

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

@@ -82,6 +82,7 @@ public class DoorBugTrajectoryReplayTests
     /// door's outdoor cell when production's doesn't.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void LiveCompare_DoorOffCenterWalkthrough_Tick13558()
     {
         var datDir = ResolveDatDir();
@@ -117,6 +118,7 @@ public class DoorBugTrajectoryReplayTests
     /// registration itself is wrong.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void LiveCompare_DoorBlocksFromOutside_Tick22760()
     {
         var datDir = ResolveDatDir();
@@ -159,6 +161,7 @@ public class DoorBugTrajectoryReplayTests
     /// hard-stopped with cn=(0,0,1). Always passes; read the console dump.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Diagnostic_Tick22760_DumpEngineInternals()
     {
         var datDir = ResolveDatDir();
@@ -211,6 +214,7 @@ public class DoorBugTrajectoryReplayTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Diagnostic_Tick13558_DumpEngineInternals()
     {
         var datDir = ResolveDatDir();
@@ -272,6 +276,7 @@ public class DoorBugTrajectoryReplayTests
     /// portal traversal IS the bug.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void FindTransitCellsSphere_IndoorExitPortal_AddsOutsideForCapturedSpherePos()
     {
         var datDir = ResolveDatDir();
@@ -472,6 +477,7 @@ public class DoorBugTrajectoryReplayTests
     /// </para>
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InsideOut_Tick3254_WithCottageWalls_ShouldBlock()
     {
         var datDir = ResolveDatDir();
@@ -543,6 +549,7 @@ public class DoorBugTrajectoryReplayTests
     /// (133.5, 17.10) to end up at X > 133.5 Y > 17.10, bug reproduced.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void CornerSlide_AlcoveEastToCottageNorth_ShouldBlock()
     {
         var datDir = ResolveDatDir();
@@ -770,6 +777,7 @@ public class DoorBugTrajectoryReplayTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Geometric_DoorSlabAtSphereHeight_OverlapsInZ()
     {
         var datDir = ResolveDatDir();
@@ -821,6 +829,7 @@ public class DoorBugTrajectoryReplayTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Directional_OutsideIn_SouthApproach_BlocksAtSlabSouthFace()
     {
         var datDir = ResolveDatDir();
@@ -848,6 +857,7 @@ public class DoorBugTrajectoryReplayTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Directional_InsideOut_NorthApproach_BlocksAtSlabNorthFace()
     {
         var datDir = ResolveDatDir();

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

@@ -40,6 +40,7 @@ namespace AcDream.Core.Tests.Physics;
 /// CI stays green. Local developer machines always have it.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class DoorCollisionApparatusTests
 {
     private readonly ITestOutputHelper _out;

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

@@ -26,6 +26,7 @@ namespace AcDream.Core.Tests.Physics;
 /// keeps CI green. Local developer runs always have it.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class DoorSetupGfxObjInspectionTests
 {
     private readonly ITestOutputHelper _out;

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

@@ -412,6 +412,7 @@ public sealed class FlatBspQueryDifferentialTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void InstalledDat_LargeRandomizedSweep_HasZeroBitMismatch()
     {
         string? datDirectory = ConformanceDats.ResolveDatDir();

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

@@ -9,6 +9,7 @@ using Xunit.Abstractions;
 
 namespace AcDream.Core.Tests.Physics;
 
+[Trait("Lane", "InstalledDat")]
 public sealed class FlatCollisionInstalledDatTests
 {
     private readonly ITestOutputHelper _output;

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

@@ -15,6 +15,7 @@ namespace AcDream.Core.Tests.Physics;
 /// The packet-driven remote mover must use these values, not a velocity guessed
 /// from the interpreted command.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class HumanoidMotionTableRootMotionTests
 {
     private const uint HumanoidMotionTable = 0x09000001u;

tests/AcDream.Core.Tests/Physics/Issue108CellarAscentViewerReplayTests.cs

@@ -66,6 +66,7 @@ namespace AcDream.Core.Tests.Physics;
 /// eye projects into the aperture band at y 9.8–17) paints the doorway.
 /// These tests stay as the characterization pin for the healthy layer.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue108CellarAscentViewerReplayTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Physics/Issue137CorridorSeamInspectionTests.cs

@@ -20,6 +20,7 @@ namespace AcDream.Core.Tests.Physics;
 /// (normal ≈ ±X at the portal's local X) — i.e., are portal-sealing polys in
 /// our collision set where retail filters them?
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue137CorridorSeamInspectionTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Physics/Issue137CorridorSeamReplayTests.cs

@@ -38,6 +38,7 @@ namespace AcDream.Core.Tests.Physics;
 /// running must keep advancing (no absorbing wedge).
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue137CorridorSeamReplayTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Physics/Issue147ArwicBuildingsDumpTests.cs

@@ -17,6 +17,7 @@ namespace AcDream.Core.Tests.Physics;
 /// (a separate shadow-object collision path). Dat-data-dependent; SKIPs cleanly
 /// without ACDREAM_DAT_DIR / the real dats.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue147ArwicBuildingsDumpTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Physics/Issue175HubDoorPoseInspectionTests.cs

@@ -39,6 +39,7 @@ public class Issue175HubDoorPoseInspectionTests
     private const uint HubDoorSetupId = 0x02000C9Du;
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void HubDoorSetup_PlacementVsMotionPose_DatInspection()
     {
         var datDir = Env.GetEnvironmentVariable("ACDREAM_DAT_DIR")
@@ -161,6 +162,7 @@ public class Issue175HubDoorPoseInspectionTests
     /// NonCombat/Ready) and asserts the derivation actually resolves a pose.
     /// </summary>
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void MotionTablePose_DefaultState_ResolvesOnRealTable()
     {
         var datDir = Env.GetEnvironmentVariable("ACDREAM_DAT_DIR")

tests/AcDream.Core.Tests/Physics/Issue176177SeamTransitLagTests.cs

@@ -24,6 +24,7 @@ namespace AcDream.Core.Tests.Physics;
 /// stair pop). This replay measures OUR resolver's flip point across the
 /// x=85 seam in a controlled run.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue176177SeamTransitLagTests
 {
     private const uint SeamCellWest = 0x8A02016Eu;   // x 75..85

tests/AcDream.Core.Tests/Physics/Issue180CorridorSweepHysteresisReplayTests.cs

@@ -35,6 +35,7 @@ namespace AcDream.Core.Tests.Physics;
 ///   3. the clipped eye is the CONSTANT surface-contact point (pre-fix it
 ///      tracked the target one step back: eyeBack = s − ~0.27).
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue180CorridorSweepHysteresisReplayTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Physics/Issue186ConnectorCellGeometryInspectionTests.cs

@@ -20,6 +20,7 @@ namespace AcDream.Core.Tests.Physics;
 /// bare connector? And does it carry collision geometry (so the camera sweep would
 /// hard-stop) or none (so the boom coasts to a degenerate spot)? Skips without the dat.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue186ConnectorCellGeometryInspectionTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Physics/Issue188FadingDoorMotionTableInspectionTests.cs

@@ -74,6 +74,7 @@ public class Issue188FadingDoorMotionTableInspectionTests
     }
 
     [Fact]
+    [Trait("Lane", "InstalledDat")]
     public void Dump_PedestalWeakSpot_MotionTable_HookContents()
     {
         var datDir = DatDir();

tests/AcDream.Core.Tests/Physics/Issue337NeftetRockGeometryInspectionTests.cs

@@ -38,6 +38,7 @@ namespace AcDream.Core.Tests.Physics;
 ///
 /// Dat-data dependent; SKIPs cleanly without ACDREAM_DAT_DIR.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class Issue337NeftetRockGeometryInspectionTests
 {
     private const uint Landblock = 0x8766_0000u;

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

@@ -40,6 +40,7 @@ namespace AcDream.Core.Tests.Physics;
 /// present (CI has no local AC install).
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class MotionCommandCatalogDatTests
 {
     /// <summary>

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

@@ -18,6 +18,7 @@ namespace AcDream.Core.Tests.Physics;
 /// when the installed DATs are absent (CI), following the
 /// DoorSetupGfxObjInspectionTests pattern.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class RestrictionObjPrevalenceInspectionTests
 {
     private readonly ITestOutputHelper _output;

tests/AcDream.Core.Tests/Rendering/Issue176177DungeonSeamInspectionTests.cs

@@ -31,6 +31,7 @@ namespace AcDream.Core.Tests.Rendering;
 /// CellPortal.PolygonId indexes CellStruct.Polygons (VISUAL), never
 /// PhysicsPolygons — same ids in both tables are unrelated polygons.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue176177DungeonSeamInspectionTests
 {
     private readonly ITestOutputHelper _out;

tests/AcDream.Core.Tests/Rendering/Issue93TownNetworkFountainRoomLightInspectionTests.cs

@@ -26,6 +26,7 @@ namespace AcDream.Core.Tests.Rendering;
 /// fountain room and its immediate neighbors observed this session, so the answer
 /// is read from the dat directly instead of inferred from aggregate counts.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class Issue93TownNetworkFountainRoomLightInspectionTests
 {
     private readonly ITestOutputHelper _out;