Merge pull request 'feat: reject contradictory reviewer handoff ledgers (Closes #501)' (#506) from feat/issue-501-reviewer-handoff-consistency into master

final_report_validator.py

@@ -13,6 +13,7 @@ from typing import Any, Callable
 
 import issue_acceptance_gate
 import issue_lock_provenance
+import reviewer_handoff_consistency
 from mcp_native_cleanup_proof import assess_mcp_native_cleanup_proof
 from post_merge_cleanup_proof import assess_post_merge_cleanup_proof
 from review_proofs import (
@@ -1132,6 +1133,25 @@ def _rule_reviewer_validation_structured(
     )
 
 
+def _rule_reviewer_handoff_consistency(report_text: str) -> list[dict[str, str]]:
+    result = reviewer_handoff_consistency.assess_reviewer_handoff_consistency(
+        report_text
+    )
+    if result.get("proven"):
+        return []
+    return _findings_from_reasons(
+        "reviewer.handoff_consistency",
+        result.get("reasons") or [],
+        field="Review mutations",
+        severity="block",
+        safe_next_action=(
+            "rewrite reviewer handoff so narrative claims match the mutation "
+            "ledger; use the blocked-review handoff template when submission "
+            "was rejected"
+        ),
+    )
+
+
 def _rule_reviewer_mutation_ledger(
     report_text: str,
     *,
@@ -1375,6 +1395,7 @@ _RULES_BY_TASK: dict[str, list[Callable[..., list[dict[str, str]]]]] = {
         _rule_reviewer_already_landed_eligible,
         _rule_reviewer_already_landed_state,
         _rule_reviewer_target_branch_freshness,
+        _rule_reviewer_handoff_consistency,
         _rule_reviewer_workflow_load_boundary,
         _rule_reviewer_mutation_ledger,
         _rule_reviewer_review_mutation,