test: separate non-hermetic release lanes

docs/release-gate.md

@@ -9,8 +9,12 @@ pwsh ./tools/run-release-gate.ps1
 
 The command verifies that `AcDream.slnx` contains every `.csproj` under `src/`,
 `tests/`, and `tools/`, performs a locked restore, builds that complete graph,
-then discovers and runs every default test assembly once in a fresh Release
+then discovers and runs every hermetic test in every default test assembly once
-process. It does not retry failures. The graph currently contains 44 projects,
+in a fresh Release process. It does not retry failures. Tests carrying an
+explicit non-hermetic `Lane` trait (`InstalledDat`, `PreparedPackage`, `Live`,
+or `Manual`), `Purpose=Diagnostic`, or `Status=KnownFailure` are excluded from
+the hermetic total and run through their owned lane instead. The graph currently
+contains 44 projects,
 including all 13 maintained .NET tools; data-dependent tools are built but are
 not executed as tests.
 
@@ -64,9 +68,36 @@ are preserved for later use. Until then, the repository command above is the
 authoritative gate. Focused portability or Vulkan jobs are not substitutes for
 the complete gate.
 
-Environment-dependent tests retain their current skip behavior and are counted
+The JSON summary records the exact test filter. Environment-dependent,
-explicitly in the JSON/TRX report. Classifying or replacing those tests belongs
+diagnostic, manual, and known-failure results must be published as their own
-to R3, not to this gate checkpoint.
+lane and must never be added to the hermetic pass headline.
+
+## Non-hermetic test lanes
+
+Installed-DAT tests require an explicit opt-in and a retail DAT directory:
+
+```powershell
+$env:ACDREAM_RUN_INSTALLED_DAT_TESTS = '1'
+$env:ACDREAM_DAT_DIR = 'C:\path\to\Asherons Call'
+dotnet test tests/AcDream.App.Tests/AcDream.App.Tests.csproj -c Release `
+  --filter 'Lane=InstalledDat&Status!=KnownFailure&Purpose!=Diagnostic'
+```
+
+Regenerate all committed UI fixtures through the one comprehensive manual
+generator (the former chat/radar-only generators were redundant):
+
+```powershell
+$env:ACDREAM_REGENERATE_UI_FIXTURES = '1'
+$env:ACDREAM_DAT_DIR = 'C:\path\to\Asherons Call'
+dotnet test tests/AcDream.App.Tests/AcDream.App.Tests.csproj -c Release `
+  --filter 'Lane=Manual'
+```
+
+Known failures (`Status=KnownFailure`) are never part of a green release total.
+Run them explicitly with their prerequisite lane configured; a failure is
+expected until the linked defect is fixed. Diagnostic apparatus
+(`Purpose=Diagnostic`) likewise reports separately and does not inflate the
+contract-test pass count.
 
 ## Updating dependencies
 

docs/reviews/2026-08-18-r3-test-truth-ledger.md

@@ -32,8 +32,8 @@ The latest clean-gate TRX files account for every reported skip:
 
 | Classification | Count | Current source | R3 decision |
 |---|---:|---|---|
-| Installed retail DAT lane | 73 | `InstalledDatFactAttribute` across nine files | Retain the contracts, replace the campaign-specific shared reason with prerequisite- and suite-specific identity, and report this lane separately. |
+| Installed retail DAT lane | 73 | `InstalledDatFactAttribute` across nine files | Retain the contracts, replace the campaign-specific shared reason with prerequisite- and suite-specific identity, and report this lane separately. Batch B assigns all nine classes to `Lane=InstalledDat`. |
-| Manual fixture generation | 2 | `ChatLayoutFixtureGenerator.GenerateChatFixture`; `RadarLayoutFixtureGenerator.GenerateRadarFixture` | Remove from default discovery and expose documented explicit generator commands. |
+| Manual fixture generation | 2 | `ChatLayoutFixtureGenerator.GenerateChatFixture`; `RadarLayoutFixtureGenerator.GenerateRadarFixture` | Delete both redundant generators: the existing comprehensive `RetailLayoutFixtureGenerator` already owns their chat and radar outputs. Assign that generator to the explicit Manual lane. |
 | Empty future scaffold | 1 | `PvsConformanceTests.Pvs_CottageInterior_MatchesRetailCellDrawList` | Delete the test. Preserve its retail oracle and capture recipe here and in the existing P0 plan. |
 | Known product failure | 1 | `TowerAscentReplayTests.TowerAscent_StaircaseStaysConeVisible_EveryStep` | Do not pretend this is unavailable coverage. Keep the oracle and move it to an explicitly reported known-failure/non-blocking lane until #119 is fixed. |
 
@@ -58,6 +58,21 @@ assign them to the installed-DAT, prepared-package, system-font, or other
 explicit prerequisite lane; a future machine may report them as additional
 skips.
 
+The lane vocabulary is deliberately orthogonal:
+
+- `Lane` states the execution environment (`InstalledDat`, `PreparedPackage`,
+  `Live`, or `Manual`);
+- `Purpose=Diagnostic` marks output/investigation apparatus that cannot add to
+  the contract-test pass count; and
+- `Status=KnownFailure` keeps a named executable oracle visible without making
+  a green release claim.
+
+The default gate excludes all three dimensions. An explicitly selected lane
+must fail clearly when its prerequisite is missing; it may not pass through an
+empty return. The 73 custom installed-DAT facts retain discovery-time skips
+when their opt-in is absent so each unavailable contract and reason remains
+identifiable in the lane report.
+
 ## Finding disposition
 
 | Finding | Current disposition | Evidence / next action |
@@ -67,7 +82,7 @@ skips.
 | T-003 duplicate theory row | high-confidence cleanup batch A | Remove literal `0x41000012`, which is identical to `MotionCommand.Crouch`; remove the temporary analyzer suppression. |
 | T-004 warning mismatches | resolved in R2 | Clean rebuild is zero-warning with repository-wide warnings-as-errors. |
 | T-005 unreachable panel stack | requires production reachability proof | Do not delete 52 meaningful tests until the dead presentation surface and any supported plugin compatibility promise are verified together. |
-| T-006 misleading installed-DAT reason | open | Replace the LA8-specific shared attribute reason with truthful suite/prerequisite identity. |
+| T-006 misleading installed-DAT reason | resolved in batch B | Shared opt-in is now `ACDREAM_RUN_INSTALLED_DAT_TESTS=1` (legacy switch retained), the reason names the lane, and all nine owners carry `Lane=InstalledDat`. |
 | T-007 271 silent passing gates | open | Re-run the syntax inventory against current source, then convert each to a hermetic fixture, explicit prerequisite skip, or non-default lane. |
 | T-008 incapable-of-failing diagnostics | batch A plus diagnostic lane work | Delete the literal wiring smoke test; repair the GPU contract tautology; later re-home output-only apparatus. |
 | T-009 wall-clock double-click tests | open | Introduce a behavior-preserving injectable monotonic clock and deterministic fake time. |
@@ -75,8 +90,8 @@ skips.
 | T-011 51 output-only methods | open | Validate the historical 51-method list against current source; add stable oracles or move them outside default discovery. |
 | T-012 source-text freezes | requires semantic replacement map | Retain whole-tree dependency rules; remove exact-text freezes only when an equivalent semantic/behavioral guard is identified. |
 | T-013 controller self-comparison | high-confidence cleanup batch A | Capture the first controller next to the first body and compare every retry with that reference. |
-| T-014 seven load-sensitive tests | open | Reproduce and classify each mechanism; no retries or blanket tolerances. |
+| T-014 seven load-sensitive tests | active; first mechanism reproduced | `PortalProjectionTests.ClipToRegion_FrameOwnedStore_ReusesExactResultArray` reported 6,904 B only while three App test hosts ran concurrently, then passed in an isolated run. Preserve both observations and remove ambient process-allocation sensitivity rather than loosening the zero-allocation oracle. |
-| T-015 four non-prerequisite skips | batch A plus lane work | Delete the PVS scaffold now; move two generators and the known failure in later focused batches. |
+| T-015 four non-prerequisite skips | resolved in batches A/B | PVS scaffold deleted with rationale preserved; redundant chat/radar generators deleted in favor of the comprehensive Manual lane; tower oracle is `Status=KnownFailure`. |
 | T-016 historical test taxonomy | open | Rename/re-home only after each test's durable owner and oracle are established. |
 | T-017 Avalonia ownership | resolved in R2 | All seven editor variants now execute in one owned application session; 11 focused passes plus the complete gate. |
 | T-018 stderr observer race | resolved in R2 | Live reader shares writes/deletes; 25 focused repetitions plus the complete gate. |
@@ -130,3 +145,37 @@ The count delta is intentional and classified: Core removed the two useless
 compile-only cases and the skipped PVS scaffold; App gained one case by
 splitting the old mixed/tautological depth-stencil test into two independently
 named contracts. Core emitted no duplicate-case discovery warning.
+
+## Preserved rationale for removals in batch B
+
+The chat- and radar-only fixture generators were not the sole way to recreate
+their committed JSON. `RetailLayoutFixtureGenerator` already includes retail
+layout IDs `0x2100006F` and `0x21000074` and writes the same
+`chat_2100006f.json` and `radar_21000074.json` destinations as part of its
+complete 20-layout run. Deleting the two permanently skipped duplicates removes
+two false test entries without losing the regeneration recipe or retail notes;
+the comprehensive generator and `docs/release-gate.md` now own that workflow.
+
+The tower staircase oracle is not unavailable or useless. Its former static
+skip documents issue #119 and the exact failing steps. Batch B keeps the
+executable assertion under `Status=KnownFailure`, separates two output-only
+methods with `Purpose=Diagnostic`, and makes missing installed DATs a clear lane
+prerequisite failure instead of a passing early return.
+
+## Batch B verification
+
+The lane-classification batch was verified without changing product code:
+
+- App Release build: 0 warnings, 0 errors;
+- hermetic App lane, isolated: 5,505 passed / 0 skipped / 0 failed;
+- Installed-DAT contract lane without opt-in: 3 passed / 73 individually named
+  skips / 0 failed (the local tower DAT prerequisite was available);
+- known-failure discovery: exactly one tower staircase oracle; and
+- Manual discovery: exactly one comprehensive fixture generator.
+
+One concurrent three-host verification attempt reproduced T-014 rather than
+being hidden: the hermetic host failed the portal-clipping zero-allocation test
+at 6,904 bytes while the Installed-DAT and discovery hosts ran beside it. The
+same unmodified hermetic command then passed 5,505/5,505 in isolation. This is
+evidence for removing cross-host allocation sensitivity; it is not grounds to
+weaken the assertion or claim a clean concurrent result.

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

@@ -36,6 +36,7 @@ namespace AcDream.App.Tests.Rendering;
 /// those runs as Skipped so the counts show "ran" separately from "no-op'd".
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class ChargenPreviewControllerTests
 {
     private readonly ITestOutputHelper _out;

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

@@ -29,6 +29,7 @@ namespace AcDream.App.Tests.Rendering;
 /// the vanish; root/visibility instability across adjacent steps pins the
 /// flap.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public class TowerAscentReplayTests
 {
     private readonly ITestOutputHelper _out;
@@ -96,10 +97,9 @@ public class TowerAscentReplayTests
         }
     }
 
-    private List<AscentStep>? RunAscent()
+    private List<AscentStep> RunAscent()
     {
-        var datDir = CornerFloodReplayTests.ResolveDatDir();
+        var datDir = RequireDatDir();
-        if (datDir is null) { _out.WriteLine("SKIP: dats unavailable"); return null; }
 
         using var dats = new DatCollection(datDir, DatAccessType.Read);
         var cells = Issue120ReciprocalPingPongTests.LoadAllInteriorCells(dats, Landblock);
@@ -203,12 +203,11 @@ public class TowerAscentReplayTests
     /// through this band (curr_cell keep-curr above open-top cells), or can
     /// ConstructView(CBldPortal) seed with an in-plane eye?
     /// </summary>
-    [Fact(Skip = "#119-residual: pins the roof-lip flood gap (steps 195-201) — un-skip with the fix; see the doc comment")]
+    [Fact]
+    [Trait("Status", "KnownFailure")]
     public void TowerAscent_StaircaseStaysConeVisible_EveryStep()
     {
         var steps = RunAscent();
-        if (steps is null) return;
-
         var failures = steps.FindAll(s => !s.StairsConeVisible);
         if (failures.Count > 0)
         {
@@ -229,8 +228,6 @@ public class TowerAscentReplayTests
     public void TowerAscent_RootDoesNotPingPong()
     {
         var steps = RunAscent();
-        if (steps is null) return;
-
         var flips = new List<int>();
         for (int i = 2; i < steps.Count; i++)
         {
@@ -265,8 +262,7 @@ public class TowerAscentReplayTests
     public void CapturedTopOfStairs_MainCellStaysInFlood(
         float ex, float ey, float ez, float fx, float fy, float fz)
     {
-        var datDir = CornerFloodReplayTests.ResolveDatDir();
+        var datDir = RequireDatDir();
-        if (datDir is null) { _out.WriteLine("SKIP: dats unavailable"); return; }
 
         using var dats = new DatCollection(datDir, DatAccessType.Read);
         var cells = Issue120ReciprocalPingPongTests.LoadAllInteriorCells(dats, Landblock);
@@ -336,10 +332,10 @@ public class TowerAscentReplayTests
     /// footprint containment).
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_TopOfStairs_GateByGate()
     {
-        var datDir = CornerFloodReplayTests.ResolveDatDir();
+        var datDir = RequireDatDir();
-        if (datDir is null) { _out.WriteLine("SKIP: dats unavailable"); return; }
 
         using var dats = new DatCollection(datDir, DatAccessType.Read);
         var cells = Issue120ReciprocalPingPongTests.LoadAllInteriorCells(dats, Landblock);
@@ -419,10 +415,15 @@ public class TowerAscentReplayTests
 
     /// <summary>Full per-step table for the investigation record.</summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Diagnostic_TowerAscent_PerStepTable()
     {
         var steps = RunAscent();
-        if (steps is null) return;
         DumpSteps(steps);
     }
+
+    private static string RequireDatDir()
+        => CornerFloodReplayTests.ResolveDatDir()
+            ?? throw new InvalidOperationException(
+                "Installed client_portal.dat is required for the tower-ascent lane.");
 }

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

@@ -17,6 +17,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// authored master-shell and page ids the campaign plan and CC4's own
 /// decomp research cite, pinning them against the real installed layout.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class CharacterCreationLiveDatTests
 {
     private static string DatDirectory =>

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

@@ -16,6 +16,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// <c>ACDREAM_PROBE_LIVE_MOUNT=1</c>; <c>ACDREAM_DAT_DIR</c> can override the
 /// ordinary Documents/Asheron's Call location. Reads the DATs read-only.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class CharacterManagementLiveDatTests
 {
     [InstalledDatFact]
@@ -368,9 +369,14 @@ internal sealed class InstalledDatFactAttribute : FactAttribute
 {
     public InstalledDatFactAttribute()
     {
-        if (Environment.GetEnvironmentVariable("ACDREAM_PROBE_LIVE_MOUNT") != "1")
+        bool requested = Environment.GetEnvironmentVariable(
+                "ACDREAM_RUN_INSTALLED_DAT_TESTS") == "1"
+            || Environment.GetEnvironmentVariable("ACDREAM_PROBE_LIVE_MOUNT") == "1";
+        if (!requested)
         {
-            Skip = "Set ACDREAM_PROBE_LIVE_MOUNT=1 to run the installed-DAT LA8 gate.";
+            Skip = "Installed-DAT lane not requested; set "
+                + "ACDREAM_RUN_INSTALLED_DAT_TESTS=1. The legacy "
+                + "ACDREAM_PROBE_LIVE_MOUNT=1 switch is also accepted.";
             return;
         }
 

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

@@ -235,7 +235,7 @@ public class ChatLayoutConformanceTests
     /// §2.5/§2.6): the chat transcript's base style (<c>0x10000372</c> in layout
     /// <c>0x2100003F</c>) authors NO property 0x21 (Outline) anywhere in its
     /// inheritance chain — regenerated straight from the real installed DAT
-    /// (<c>ChatLayoutFixtureGenerator</c>), proving the property-0x21/0x22
+    /// (<c>RetailLayoutFixtureGenerator</c>), proving the property-0x21/0x22
     /// importer (<see cref="ElementReader.ApplyCanonicalLegacyProjection"/>)
     /// resolves this correctly end to end, not merely by a missing-field JSON
     /// default.

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

@@ -1,50 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.CompilerServices;
-using System.Text.Json;
-using AcDream.App.UI.Layout;
-using DatReaderWriter;
-using DatReaderWriter.Options;
-
-namespace AcDream.App.Tests.UI.Layout;
-
-/// <summary>
-/// One-off generator for the committed chat golden fixture. Skipped by default —
-/// run manually with the real dats present (set ACDREAM_DAT_DIR) to regenerate
-/// chat_2100006f.json, then commit it. Mirrors how vitals_2100006C.json was made.
-///
-/// <para>
-/// Campaign CH slice CH6a swapped the imported main-chat LayoutDesc from the
-/// wrong <c>0x21000006</c> (a different, unrelated chat layout whose root
-/// <c>0x1000000E</c> and 800px resize bar <c>0x1000000F</c> appear nowhere in
-/// the EoR gameplay UI) to retail's actual main chat window,
-/// <c>0x2100006F</c> (window element <c>0x10000601</c>, layout root
-/// <c>0x10000600</c>, authored 410x100 — see
-/// docs/research/2026-08-09-chat-retail-window-shell.md §2.1 and §5). The old
-/// <c>chat_21000006.json</c> fixture is retired with it.
-/// </para>
-/// </summary>
-public class ChatLayoutFixtureGenerator
-{
-    [Fact(Skip = "manual: regenerates the committed chat fixture; needs the real dats (ACDREAM_DAT_DIR)")]
-    public void GenerateChatFixture()
-    {
-        var datDir = Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")
-            ?? Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
-                            "Documents", "Asheron's Call");
-        using var dats = new DatCollection(datDir, DatAccessType.Read);
-        var info = LayoutImporter.ImportInfos(dats, 0x2100006Fu);
-        Assert.NotNull(info);
-
-        var json = JsonSerializer.Serialize(info, new JsonSerializerOptions
-        {
-            IncludeFields = true,
-            WriteIndented = true,
-        });
-        File.WriteAllText(FixturePath(), json);
-    }
-
-    // Resolve the SOURCE fixtures dir (not bin/) from this file's compile-time path.
-    private static string FixturePath([CallerFilePath] string thisFile = "")
-        => Path.Combine(Path.GetDirectoryName(thisFile)!, "fixtures", "chat_2100006f.json");
-}

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

@@ -17,6 +17,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// proves the escape class genuinely exists in shipping data and prints
 /// which tables carry it.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class DatStringEscapeSweepTests
 {
     [InstalledDatFact]

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

@@ -24,6 +24,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// elements (not a brittle exact global total) so the gate survives a
 /// future DAT revision without going red on an unrelated content change.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class LayoutImporterMediaBearingChildSweepTests
 {
     private static string DatDirectory =>

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

@@ -34,6 +34,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// Documents/Asheron's Call location.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class MapHousePanelLiveDatMountTests
 {
     private static string DatDirectory =>

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

@@ -30,6 +30,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// A=FF R=00 G=FF B=00) via per-state <c>P0x3B</c>.
 /// </para>
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class MapNoteLiveDatTests
 {
     private static string DatDirectory =>

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

@@ -1,36 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.CompilerServices;
-using System.Text.Json;
-using AcDream.App.UI.Layout;
-using DatReaderWriter;
-using DatReaderWriter.Options;
-
-namespace AcDream.App.Tests.UI.Layout;
-
-/// <summary>One-off generator for the committed retail radar LayoutDesc fixture.</summary>
-public sealed class RadarLayoutFixtureGenerator
-{
-    [Fact(Skip = "manual: regenerates the committed radar fixture; needs the real dats (ACDREAM_DAT_DIR)")]
-    public void GenerateRadarFixture()
-    {
-        var datDir = Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")
-            ?? Path.Combine(
-                Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
-                "Documents",
-                "Asheron's Call");
-        using var dats = new DatCollection(datDir, DatAccessType.Read);
-        var info = LayoutImporter.ImportInfos(dats, RadarController.LayoutId);
-        Assert.NotNull(info);
-
-        var json = JsonSerializer.Serialize(info, new JsonSerializerOptions
-        {
-            IncludeFields = true,
-            WriteIndented = true,
-        });
-        File.WriteAllText(FixturePath(), json);
-    }
-
-    private static string FixturePath([CallerFilePath] string thisFile = "")
-        => Path.Combine(Path.GetDirectoryName(thisFile)!, "fixtures", "radar_21000074.json");
-}

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

@@ -9,9 +9,10 @@ namespace AcDream.App.Tests.UI.Layout;
 
 /// <summary>
 /// Regenerates every committed retail layout fixture from production portal.dat.
-/// The test is inert unless <c>ACDREAM_REGENERATE_UI_FIXTURES=1</c> is set, keeping
+/// The manual lane requires <c>ACDREAM_REGENERATE_UI_FIXTURES=1</c>, keeping
 /// normal test runs deterministic and dat-independent.
 /// </summary>
+[Trait("Lane", "Manual")]
 public sealed class RetailLayoutFixtureGenerator
 {
     private static readonly (uint Id, string FileName)[] Layouts =
@@ -46,7 +47,10 @@ public sealed class RetailLayoutFixtureGenerator
                 "1",
                 StringComparison.Ordinal))
         {
-            return;
+            throw new InvalidOperationException(
+                "Manual fixture generation was not requested; set "
+                    + "ACDREAM_REGENERATE_UI_FIXTURES=1 and ACDREAM_DAT_DIR, "
+                    + "then run the Manual lane explicitly.");
         }
 
         var datDir = Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR")

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

@@ -19,6 +19,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// sweep landmark, mirroring <see cref="CharacterManagementLiveDatTests"/>'s
 /// pattern.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class TooltipLiveDatTests
 {
     private static string DatDirectory =>

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

@@ -21,6 +21,7 @@ namespace AcDream.App.Tests.UI.Layout;
 /// enumeration for the commit message, pins landmark counts rather than a
 /// brittle exact global total.
 /// </summary>
+[Trait("Lane", "InstalledDat")]
 public sealed class UiButtonCorpusSweepTests
 {
     private static string DatDirectory =>

tools/run-release-gate.ps1

@@ -23,6 +23,7 @@ param(
     [int]$BuildTimeoutSeconds = 900,
     [int]$TestTimeoutSeconds = 600,
     [int]$HangTimeoutSeconds = 180,
+    [string]$TestFilter = 'Lane!=InstalledDat&Lane!=PreparedPackage&Lane!=Live&Lane!=Manual&Purpose!=Diagnostic&Status!=KnownFailure',
     [switch]$SkipRestore,
     [switch]$SkipBuild
 )
@@ -373,6 +374,8 @@ try {
             '--no-restore'
             '--no-build'
             '--nologo'
+            '--filter'
+            $TestFilter
             '--results-directory'
             $projectResultDirectory
             '--logger'
@@ -434,6 +437,7 @@ try {
         DurationSeconds = [Math]::Round(($gateEndedUtc - $gateStartedUtc).TotalSeconds, 3)
         Solution = 'AcDream.slnx'
         TestProjectCount = $testProjects.Count
+        TestFilter = $TestFilter
         Timeouts = [ordered]@{
             RestoreSeconds = $RestoreTimeoutSeconds
             BuildSeconds = $BuildTimeoutSeconds