diff --git a/apps/api/src/api/v1/auto_repair.py b/apps/api/src/api/v1/auto_repair.py
index 980f5e729..a75b016a4 100644
--- a/apps/api/src/api/v1/auto_repair.py
+++ b/apps/api/src/api/v1/auto_repair.py
@@ -17,11 +17,13 @@ from fastapi import APIRouter, HTTPException, Query
 from pydantic import BaseModel, Field
 
 from src.core.csrf import CSRFToken  # Phase 20: CSRF Protection
-
 from src.services.auto_repair_service import (
     get_auto_repair_service,
 )
-from src.services.incident_service import get_incident_service
+from src.services.incident_service import (
+    IncidentDurableReadError,
+    get_incident_service,
+)
 
 router = APIRouter(prefix="/auto-repair", tags=["Auto Repair"])
 
@@ -251,6 +253,12 @@ class RepairHistoryResponse(BaseModel):
 @router.get("/history", response_model=RepairHistoryResponse)
 async def get_repair_history(
     limit: int = Query(20, ge=1, le=100),
+    project_id: str = Query(
+        "awoooi",
+        min_length=1,
+        max_length=64,
+        description="租戶 ID；legacy repair history 預設綁定 awoooi。",
+    ),
 ) -> RepairHistoryResponse:
     """
     取得修復歷史記錄。
@@ -259,7 +267,9 @@ async def get_repair_history(
     """
     try:
         incident_service = get_incident_service()
-        all_incidents = await incident_service.get_active_incidents()
+        all_incidents = await incident_service.get_active_incidents(
+            project_id=project_id,
+        )
 
         items: list[RepairHistoryItem] = []
         for incident in all_incidents:
@@ -307,6 +317,23 @@ async def get_repair_history(
 
         return RepairHistoryResponse(count=len(items), items=items)
 
-    except Exception:
-        # 任何錯誤都回傳空列表，不中斷前端
-        return RepairHistoryResponse(count=0, items=[])
+    except IncidentDurableReadError as exc:
+        raise HTTPException(
+            status_code=503,
+            detail={
+                "status": "degraded",
+                "reason_code": str(exc),
+                "source_of_truth": "postgresql",
+                "redis_fallback_used": False,
+            },
+        ) from exc
+    except Exception as exc:
+        raise HTTPException(
+            status_code=503,
+            detail={
+                "status": "degraded",
+                "reason_code": "repair_history_readback_failed",
+                "source_of_truth": "postgresql",
+                "redis_fallback_used": False,
+            },
+        ) from exc
diff --git a/apps/api/tests/test_incident_readback_source_truth.py b/apps/api/tests/test_incident_readback_source_truth.py
index 8844f0338..0874abf9e 100644
--- a/apps/api/tests/test_incident_readback_source_truth.py
+++ b/apps/api/tests/test_incident_readback_source_truth.py
@@ -6,6 +6,7 @@ from unittest.mock import AsyncMock
 import pytest
 from fastapi import HTTPException
 
+from src.api.v1 import auto_repair as auto_repair_api
 from src.api.v1 import incidents as incidents_api
 from src.models.incident import Incident, IncidentStatus, Severity
 from src.repositories import incident_repository as incident_repository_module
@@ -247,3 +248,52 @@ async def test_incident_detail_reports_durable_readback_degraded(monkeypatch):
         "source_of_truth": "postgresql",
         "redis_fallback_used": False,
     }
+
+
+@pytest.mark.asyncio
+async def test_repair_history_binds_project_to_durable_incident_read(monkeypatch):
+    durable_active = _incident(IncidentStatus.INVESTIGATING, minute=38)
+
+    class _Service:
+        get_active_incidents = AsyncMock(return_value=[durable_active])
+
+    service = _Service()
+    monkeypatch.setattr(auto_repair_api, "get_incident_service", lambda: service)
+
+    result = await auto_repair_api.get_repair_history(
+        limit=20,
+        project_id="awoooi",
+    )
+
+    assert result.count == 0
+    service.get_active_incidents.assert_awaited_once_with(project_id="awoooi")
+
+
+@pytest.mark.asyncio
+async def test_repair_history_reports_durable_read_degraded(monkeypatch):
+    class _Service:
+        get_active_incidents = AsyncMock(
+            side_effect=IncidentDurableReadError(
+                "active_incidents_durable_read_unavailable"
+            )
+        )
+
+    monkeypatch.setattr(
+        auto_repair_api,
+        "get_incident_service",
+        lambda: _Service(),
+    )
+
+    with pytest.raises(HTTPException) as exc_info:
+        await auto_repair_api.get_repair_history(
+            limit=20,
+            project_id="awoooi",
+        )
+
+    assert exc_info.value.status_code == 503
+    assert exc_info.value.detail == {
+        "status": "degraded",
+        "reason_code": "active_incidents_durable_read_unavailable",
+        "source_of_truth": "postgresql",
+        "redis_fallback_used": False,
+    }
diff --git a/apps/web/src/components/panels/NeuralCommandPanel.tsx b/apps/web/src/components/panels/NeuralCommandPanel.tsx
index 76d378dcb..7e2d9b4d8 100644
--- a/apps/web/src/components/panels/NeuralCommandPanel.tsx
+++ b/apps/web/src/components/panels/NeuralCommandPanel.tsx
@@ -49,7 +49,7 @@ export function NeuralCommandPanel() {
       const [statsRes, pbRes, histRes, approvalsRes, incidentsRes, dispRes] = await Promise.all([
         fetch('/api/v1/auto-repair/stats'),
         fetch('/api/v1/playbooks/'),
-        fetch('/api/v1/auto-repair/history?limit=20'),
+        fetch('/api/v1/auto-repair/history?limit=20&project_id=awoooi'),
         fetch('/api/v1/approvals/pending'),
         fetch('/api/v1/incidents?status=firing&limit=10'),
         fetch('/api/v1/stats/disposition').catch(() => null),