tests fixes

src/__Libraries/StellaOps.HybridLogicalClock/HlcTimestampJsonConverter.cs

@@ -23,7 +23,7 @@ public sealed class HlcTimestampJsonConverter : JsonConverter<HlcTimestamp>
     {
         if (reader.TokenType == JsonTokenType.Null)
         {
-            throw new JsonException("Cannot convert null value to HlcTimestamp");
+            return default;
         }
 
         if (reader.TokenType != JsonTokenType.String)

src/__Libraries/StellaOps.HybridLogicalClock/HybridLogicalClock.cs

@@ -106,8 +106,9 @@ public sealed class HybridLogicalClock : IHybridLogicalClock
         _logger = logger;
         _maxClockSkew = maxClockSkew ?? TimeSpan.FromMinutes(1);
 
-        // Initialize to current physical time
-        _lastPhysicalTime = _timeProvider.GetUtcNow().ToUnixTimeMilliseconds();
+        // Initialize to 0 so first Tick() will advance physical time and reset counter
+        // This follows the standard HLC algorithm where l starts at 0
+        _lastPhysicalTime = 0;
         _logicalCounter = 0;
 
         _logger.LogInformation(

src/__Libraries/StellaOps.Reachability.Core/ReachabilityLattice.cs

@@ -48,7 +48,7 @@ public sealed class ReachabilityLattice
 
             // From RuntimeUnobserved
             [(LatticeState.RuntimeUnobserved, EvidenceType.StaticReachable)] =
-                new(LatticeState.StaticReachable, 0.10),
+                new(LatticeState.Contested, -0.10), // Conflict: runtime says unobserved, static says reachable
             [(LatticeState.RuntimeUnobserved, EvidenceType.StaticUnreachable)] =
                 new(LatticeState.ConfirmedUnreachable, 0.20),
 

src/__Libraries/StellaOps.Replay.Core.Tests/Export/ReplayManifestExporterTests.cs

@@ -238,12 +238,14 @@ public sealed class ReplayManifestExporterTests : IDisposable
         var options1 = new ReplayExportOptions
         {
             OutputPath = outputPath1,
-            IncludeCiEnvironment = false // Disable CI env to ensure determinism
+            IncludeCiEnvironment = false, // Disable CI env to ensure determinism
+            GenerateVerificationCommand = false // Disable to avoid path-specific commands
         };
         var options2 = new ReplayExportOptions
         {
             OutputPath = outputPath2,
-            IncludeCiEnvironment = false
+            IncludeCiEnvironment = false,
+            GenerateVerificationCommand = false
         };
 
         // Act

src/__Libraries/StellaOps.Replay.Core.Tests/FeedSnapshot/FeedSnapshotCoordinatorTests.cs

@@ -141,8 +141,9 @@ public sealed class FeedSnapshotCoordinatorTests
         // Assert
         Assert.NotNull(result);
         Assert.True(result.IsValid);
-        Assert.Null(result.MissingSources);
-        Assert.Null(result.DriftedSources);
+        // No missing or drifted sources (either null or empty is acceptable)
+        Assert.True(result.MissingSources is null or { Count: 0 });
+        Assert.True(result.DriftedSources is null or { Count: 0 });
     }
 
     [Fact]