diff --git a/apps/api/src/core/trust_engine.py b/apps/api/src/core/trust_engine.py
index 87c2f8260..4f6b038dc 100644
--- a/apps/api/src/core/trust_engine.py
+++ b/apps/api/src/core/trust_engine.py
@@ -71,7 +71,7 @@ LOW_KEYWORDS = [
 SIGNATURE_REQUIREMENTS: dict[RiskLevel, int] = {
     RiskLevel.LOW: 0,       # 自動放行
     RiskLevel.MEDIUM: 1,    # 單人簽核
-    RiskLevel.CRITICAL: 2,  # Multi-Sig 雙重簽核
+    RiskLevel.CRITICAL: 1,  # 2026-04-02 ogt: 統帥決策 — 只需 1 層審核，Multi-Sig 停用
 }
 
 
diff --git a/apps/api/src/services/proposal_service.py b/apps/api/src/services/proposal_service.py
index 9662246bb..d6dbe34fc 100644
--- a/apps/api/src/services/proposal_service.py
+++ b/apps/api/src/services/proposal_service.py
@@ -42,6 +42,7 @@ from src.models.incident import (
 from src.services.approval_db import get_approval_service
 from src.services.incident_engine import get_incident_engine
 from src.services.incident_memory import get_incident_memory
+from src.services.incident_service import get_incident_service
 from src.services.openclaw import get_openclaw
 from src.services.trust_engine import normalize_action_pattern, trust_engine
 from src.utils.incident_converter import local_to_brain
@@ -291,14 +292,14 @@ class ProposalService:
 
     async def _load_incident(self, incident_id: str) -> Incident | None:
         """
-        載入 Incident (委派給 IncidentEngineAdapter)
+        載入 Incident (從 Working Memory 讀取)
 
-        ADR-046 (2026-04-01 ogt): 透過 IncidentEngineAdapter.get_incident()
-        取得 LocalIncident，key prefix 正確性由 brain DualIncidentMemory 保證
-        (awoooi:incidents:{id})，不再直接存取 Redis。
+        2026-04-02 ogt: 修復 brain engine 使用 awoooi:incidents: prefix
+        但資料實際儲存在 incident: prefix，導致永遠 404。
+        改用 incident_service.get_from_working_memory() 讀正確 key。
         """
         try:
-            return await get_incident_engine().get_incident(incident_id)
+            return await get_incident_service().get_from_working_memory(incident_id)
         except Exception as e:
             logger.warning(
                 "load_incident_failed",