old sprints work, new sprints for exposing functionality via cli, improve code_of_conduct and other agents instructions

src/Policy/__Libraries/StellaOps.Policy.Determinization/Evidence/ReachabilityEvidence.cs

@@ -54,6 +54,20 @@ public sealed record ReachabilityEvidence
     /// </summary>
     [JsonIgnore]
     public bool IsReachable => Status == ReachabilityStatus.Reachable;
+
+    // Sprint: SPRINT_20260112_004_BE_policy_determinization_attested_rules (DET-ATT-002)
+
+    /// <summary>
+    /// Anchor metadata for the reachability evidence (DSSE envelope, Rekor, etc.).
+    /// </summary>
+    [JsonPropertyName("anchor")]
+    public EvidenceAnchor? Anchor { get; init; }
+
+    /// <summary>
+    /// Whether the reachability evidence is anchored (has DSSE/Rekor attestation).
+    /// </summary>
+    [JsonIgnore]
+    public bool IsAnchored => Anchor?.Anchored == true;
 }
 
 /// <summary>