diff --git a/llm_normalizer/backend/dist/services/assistantRoutePolicy.js b/llm_normalizer/backend/dist/services/assistantRoutePolicy.js
index 850d997..8505f3d 100644
--- a/llm_normalizer/backend/dist/services/assistantRoutePolicy.js
+++ b/llm_normalizer/backend/dist/services/assistantRoutePolicy.js
@@ -656,6 +656,45 @@ function createAssistantRoutePolicy(deps) {
                 }
             };
         }
+        const unsupportedCurrentTurnMeaningBoundary = Boolean(assistantTurnMeaning?.unsupported_but_understood_family &&
+            assistantTurnMeaning?.stale_replay_forbidden === true &&
+            !turnMeaningIntentCandidate &&
+            !dataScopeMetaQuery &&
+            !capabilityMetaQuery &&
+            !dangerOrCoercionSignal &&
+            !organizationClarificationContinuationDetected);
+        if (unsupportedCurrentTurnMeaningBoundary) {
+            return {
+                runAddressLane: false,
+                toolGateDecision: "skip_address_lane",
+                toolGateReason: "unsupported_current_turn_meaning_boundary",
+                livingMode: "chat",
+                livingReason: "unsupported_current_turn_meaning_boundary",
+                orchestrationContract: {
+                    schema_version: "assistant_orchestration_contract_v1",
+                    hard_meta_mode: null,
+                    provider_execution: providerExecution,
+                    assistant_turn_meaning: assistantTurnMeaning,
+                    address_mode: resolvedModeDetection.mode,
+                    address_mode_confidence: resolvedModeDetection.confidence,
+                    address_intent: resolvedIntentResolution.intent,
+                    address_intent_confidence: resolvedIntentResolution.confidence,
+                    strong_data_signal_detected: strongDataSignal,
+                    data_retrieval_signal_detected: dataRetrievalSignal,
+                    followup_context_detected: Boolean(followupContext),
+                    unsupported_current_turn_meaning_boundary: true,
+                    unsupported_current_turn_family: assistantTurnMeaning.unsupported_but_understood_family,
+                    unsupported_address_intent_fallback_to_deep: false,
+                    final_decision: {
+                        run_address_lane: false,
+                        tool_gate_decision: "skip_address_lane",
+                        tool_gate_reason: "unsupported_current_turn_meaning_boundary",
+                        living_mode: "chat",
+                        living_reason: "unsupported_current_turn_meaning_boundary"
+                    }
+                }
+            };
+        }
         if (organizationFactLookupDetected || organizationFactBoundaryFollowupDetected) {
             return {
                 runAddressLane: false,
diff --git a/llm_normalizer/backend/dist/services/assistantRuntimeContractResolver.js b/llm_normalizer/backend/dist/services/assistantRuntimeContractResolver.js
index c705e9d..c286684 100644
--- a/llm_normalizer/backend/dist/services/assistantRuntimeContractResolver.js
+++ b/llm_normalizer/backend/dist/services/assistantRuntimeContractResolver.js
@@ -111,6 +111,9 @@ function resolveTransitionId(input) {
     if (toolGateReason === "memory_recap_followup_detected") {
         return { transitionId: "T9", reasons: ["memory_recap_tool_gate_reason"] };
     }
+    if (toolGateReason === "unsupported_current_turn_meaning_boundary") {
+        return { transitionId: "T10", reasons: ["unsupported_current_turn_meaning_boundary"] };
+    }
     if (hardMetaMode === "capability" || toolGateReason === "assistant_capability_query_detected") {
         return { transitionId: "T8", reasons: ["capability_meta_followup_tool_gate_reason"] };
     }
diff --git a/llm_normalizer/backend/src/services/assistantRoutePolicy.ts b/llm_normalizer/backend/src/services/assistantRoutePolicy.ts
index 5a5af53..f9ac527 100644
--- a/llm_normalizer/backend/src/services/assistantRoutePolicy.ts
+++ b/llm_normalizer/backend/src/services/assistantRoutePolicy.ts
@@ -739,6 +739,46 @@ export function createAssistantRoutePolicy(deps) {
               }
           };
       }
+      const unsupportedCurrentTurnMeaningBoundary = Boolean(
+          assistantTurnMeaning?.unsupported_but_understood_family &&
+          assistantTurnMeaning?.stale_replay_forbidden === true &&
+          !turnMeaningIntentCandidate &&
+          !dataScopeMetaQuery &&
+          !capabilityMetaQuery &&
+          !dangerOrCoercionSignal &&
+          !organizationClarificationContinuationDetected);
+      if (unsupportedCurrentTurnMeaningBoundary) {
+          return {
+              runAddressLane: false,
+              toolGateDecision: "skip_address_lane",
+              toolGateReason: "unsupported_current_turn_meaning_boundary",
+              livingMode: "chat",
+              livingReason: "unsupported_current_turn_meaning_boundary",
+              orchestrationContract: {
+                  schema_version: "assistant_orchestration_contract_v1",
+                  hard_meta_mode: null,
+                  provider_execution: providerExecution,
+                  assistant_turn_meaning: assistantTurnMeaning,
+                  address_mode: resolvedModeDetection.mode,
+                  address_mode_confidence: resolvedModeDetection.confidence,
+                  address_intent: resolvedIntentResolution.intent,
+                  address_intent_confidence: resolvedIntentResolution.confidence,
+                  strong_data_signal_detected: strongDataSignal,
+                  data_retrieval_signal_detected: dataRetrievalSignal,
+                  followup_context_detected: Boolean(followupContext),
+                  unsupported_current_turn_meaning_boundary: true,
+                  unsupported_current_turn_family: assistantTurnMeaning.unsupported_but_understood_family,
+                  unsupported_address_intent_fallback_to_deep: false,
+                  final_decision: {
+                      run_address_lane: false,
+                      tool_gate_decision: "skip_address_lane",
+                      tool_gate_reason: "unsupported_current_turn_meaning_boundary",
+                      living_mode: "chat",
+                      living_reason: "unsupported_current_turn_meaning_boundary"
+                  }
+              }
+          };
+      }
       if (organizationFactLookupDetected || organizationFactBoundaryFollowupDetected) {
           return {
               runAddressLane: false,
diff --git a/llm_normalizer/backend/src/services/assistantRuntimeContractResolver.ts b/llm_normalizer/backend/src/services/assistantRuntimeContractResolver.ts
index bef6700..4d6198a 100644
--- a/llm_normalizer/backend/src/services/assistantRuntimeContractResolver.ts
+++ b/llm_normalizer/backend/src/services/assistantRuntimeContractResolver.ts
@@ -159,6 +159,10 @@ function resolveTransitionId(input: {
     return { transitionId: "T9", reasons: ["memory_recap_tool_gate_reason"] };
   }
 
+  if (toolGateReason === "unsupported_current_turn_meaning_boundary") {
+    return { transitionId: "T10", reasons: ["unsupported_current_turn_meaning_boundary"] };
+  }
+
   if (hardMetaMode === "capability" || toolGateReason === "assistant_capability_query_detected") {
     return { transitionId: "T8", reasons: ["capability_meta_followup_tool_gate_reason"] };
   }
diff --git a/llm_normalizer/backend/tests/assistantRoutePolicy.test.ts b/llm_normalizer/backend/tests/assistantRoutePolicy.test.ts
index c897692..3c2c187 100644
--- a/llm_normalizer/backend/tests/assistantRoutePolicy.test.ts
+++ b/llm_normalizer/backend/tests/assistantRoutePolicy.test.ts
@@ -700,4 +700,48 @@ describe("assistantRoutePolicy", () => {
       "assistant_turn_meaning_v1"
     );
   });
+
+  it("routes unsupported-but-understood current meaning to boundary instead of stale address carryover", () => {
+    const policy = buildPolicy({
+      hasDataRetrievalRequestSignal: () => true,
+      hasStrongDataIntentSignal: () => true,
+      resolveAddressToolGateDecision: () => ({
+        runAddressLane: true,
+        decision: "run_address_lane",
+        reason: "followup_context_detected"
+      }),
+      resolveAssistantTurnMeaning: () => ({
+        schema_version: "assistant_turn_meaning_v1",
+        asked_domain_family: "counterparty",
+        asked_action_family: "counterparty_value_or_turnover",
+        explicit_intent_candidate: null,
+        unsupported_but_understood_family: "counterparty_value_or_turnover",
+        stale_replay_forbidden: true,
+        reason_codes: ["counterparty_turnover_current_turn_signal"]
+      })
+    });
+
+    const decision = policy.resolveAssistantOrchestrationDecision({
+      rawUserMessage:
+        "\u043a\u0430\u043a\u043e\u0439 \u043e\u0431\u043e\u0440\u043e\u0442 \u0431\u044b\u043b \u0441\u0432\u043a",
+      effectiveAddressUserMessage:
+        "\u043a\u0430\u043a\u043e\u0439 \u043e\u0431\u043e\u0440\u043e\u0442 \u0431\u044b\u043b \u0441\u0432\u043a",
+      followupContext: {
+        previous_intent: "list_documents_by_counterparty",
+        previous_filters: {
+          counterparty: "Previous Counterparty"
+        }
+      },
+      llmPreDecomposeMeta: null,
+      useMock: false
+    });
+
+    expect(decision.runAddressLane).toBe(false);
+    expect(decision.toolGateReason).toBe("unsupported_current_turn_meaning_boundary");
+    expect(decision.livingMode).toBe("chat");
+    expect(decision.orchestrationContract?.unsupported_current_turn_meaning_boundary).toBe(true);
+    expect(decision.orchestrationContract?.unsupported_current_turn_family).toBe(
+      "counterparty_value_or_turnover"
+    );
+  });
 });
diff --git a/llm_normalizer/backend/tests/assistantRuntimeContractRegistry.test.ts b/llm_normalizer/backend/tests/assistantRuntimeContractRegistry.test.ts
index a225c4f..0916fa8 100644
--- a/llm_normalizer/backend/tests/assistantRuntimeContractRegistry.test.ts
+++ b/llm_normalizer/backend/tests/assistantRuntimeContractRegistry.test.ts
@@ -156,6 +156,23 @@ describe("assistant runtime contract registry", () => {
     expect(blockedDecision.carryover_eligibility).toBe("none");
   });
 
+  it("resolves unsupported current-turn meaning boundary as blocked transition", () => {
+    const decision = resolveAssistantRuntimeContractShadow({
+      addressRuntimeMeta: {
+        toolGateReason: "unsupported_current_turn_meaning_boundary",
+        orchestrationContract: {
+          unsupported_current_turn_meaning_boundary: true,
+          unsupported_current_turn_family: "counterparty_value_or_turnover",
+          address_intent: "unknown"
+        }
+      }
+    });
+
+    expect(decision.transition_contract_id).toBe("T10");
+    expect(decision.transition_contract_reason).toEqual(["unsupported_current_turn_meaning_boundary"]);
+    expect(decision.carryover_eligibility).toBe("none");
+  });
+
   it("classifies temporal limitations as a distinct truth gate status", () => {
     const decision = resolveAssistantRuntimeContractShadow({
       addressDebug: {