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src/Signals/StellaOps.Signals/Models/ReachabilityFactDocument.cs

@@ -21,8 +21,12 @@ public sealed class ReachabilityFactDocument
 
     public ContextFacts? ContextFacts { get; set; }
 
+    public UncertaintyDocument? Uncertainty { get; set; }
+
     public double Score { get; set; }
 
+    public double RiskScore { get; set; }
+
     public int UnknownsCount { get; set; }
 
     public double UnknownsPressure { get; set; }
@@ -42,6 +46,16 @@ public sealed class ReachabilityStateDocument
 
     public string Bucket { get; set; } = "unknown";
 
+    /// <summary>
+    /// v1 lattice state code (U, SR, SU, RO, RU, CR, CU, X).
+    /// </summary>
+    public string? LatticeState { get; set; }
+
+    /// <summary>
+    /// Previous lattice state before this transition (for audit trail).
+    /// </summary>
+    public string? PreviousLatticeState { get; set; }
+
     public double Weight { get; set; }
 
     public double Score { get; set; }
@@ -49,6 +63,11 @@ public sealed class ReachabilityStateDocument
     public List<string> Path { get; set; } = new();
 
     public ReachabilityEvidenceDocument Evidence { get; set; } = new();
+
+    /// <summary>
+    /// Timestamp of the last lattice state transition.
+    /// </summary>
+    public DateTimeOffset? LatticeTransitionAt { get; set; }
 }
 
 public sealed class ReachabilityEvidenceDocument