diff --git a/apps/api/src/jobs/offline_replay_service.py b/apps/api/src/jobs/offline_replay_service.py
index 22e7583c..700234dc 100644
--- a/apps/api/src/jobs/offline_replay_service.py
+++ b/apps/api/src/jobs/offline_replay_service.py
@@ -162,6 +162,24 @@ class OfflineReplayService:
         # 2. 寫入治理事件
         await self._save_governance_event(report)
 
+        # 2026-04-27 P3.1-T1 by Claude — 三 Tier-1 服務整合
+        # 回放事件寫入後，觸發 ModelRollbackService 衰退偵測
+        # feature flag 由 model_rollback_service.check() 自行判斷（AIOPS_P6_GOVERNANCE_ENABLED）
+        try:
+            from src.services.model_rollback_service import get_model_rollback_service
+            _mr_svc = get_model_rollback_service()
+            _mr_result = await _mr_svc.check()
+            if _mr_result.retrain_recommended:
+                logger.warning(
+                    "model_rollback_triggered",
+                    reason="retrain_recommended",
+                    streak=_mr_result.consecutive_declines,
+                    absolute_floor_breached=_mr_result.absolute_floor_breached,
+                    conservative_mode_triggered=_mr_result.conservative_mode_triggered,
+                )
+        except Exception as _mr_e:
+            logger.exception("model_rollback_check_failed", error=str(_mr_e))
+
         logger.info(
             "offline_replay_done",
             sampled=report.incidents_sampled,
diff --git a/apps/api/src/services/approval_execution.py b/apps/api/src/services/approval_execution.py
index d2cf21d3..e7ff93b9 100644
--- a/apps/api/src/services/approval_execution.py
+++ b/apps/api/src/services/approval_execution.py
@@ -154,6 +154,54 @@ class ApprovalExecutionService:
         resource_name = parsed.resource_name
         namespace = parsed.namespace
 
+        # 2026-04-27 P3.1-T1 by Claude — 三 Tier-1 服務整合
+        # kubectl 指令解析後，動態驗證資源是否存在於 K8s，並套用 normalized name
+        # exception 不阻斷主流程；miss/suggestion 只記 warning + metadata，不攔截執行
+        if resource_name is not None and operation_type is not None:
+            try:
+                from src.services.resource_resolver import get_resource_resolver
+                from src.core.metrics import RESOURCE_RESOLVE_TOTAL
+
+                _resolver = get_resource_resolver()
+                _resolve = await _resolver.resolve(
+                    raw_resource=resource_name,
+                    namespace=namespace,
+                    resource_kind="deployment",
+                )
+                if _resolve.success and _resolve.resource_name:
+                    if _resolve.resource_name != resource_name:
+                        logger.info(
+                            "resource_name_normalized",
+                            original=resource_name,
+                            normalized=_resolve.resource_name,
+                            namespace=namespace,
+                        )
+                    resource_name = _resolve.resource_name
+                    RESOURCE_RESOLVE_TOTAL.labels(result="hit").inc()
+                elif _resolve.candidates:
+                    logger.warning(
+                        "resource_not_found_in_k8s",
+                        resource=resource_name,
+                        namespace=namespace,
+                        suggestions=_resolve.candidates,
+                    )
+                    RESOURCE_RESOLVE_TOTAL.labels(result="suggestion").inc()
+                else:
+                    logger.warning(
+                        "resource_not_found_in_k8s",
+                        resource=resource_name,
+                        namespace=namespace,
+                        suggestions=[],
+                    )
+                    RESOURCE_RESOLVE_TOTAL.labels(result="miss").inc()
+            except Exception as _rr_e:
+                logger.warning("resource_resolve_failed", error=str(_rr_e))
+                try:
+                    from src.core.metrics import RESOURCE_RESOLVE_TOTAL
+                    RESOURCE_RESOLVE_TOTAL.labels(result="error").inc()
+                except Exception:
+                    pass
+
         if operation_type is None or resource_name is None:
             # 2026-04-19 ogt + Claude Opus 4.7: 區分 NO_ACTION vs 真解析失敗
             # NO_ACTION 是 AI 刻意選的「純調查不破壞」,不該誤標 EXECUTION_FAILED