diff --git a/apps/api/src/api/v1/ai_slo.py b/apps/api/src/api/v1/ai_slo.py
index 1da56b73..17a6d63f 100644
--- a/apps/api/src/api/v1/ai_slo.py
+++ b/apps/api/src/api/v1/ai_slo.py
@@ -58,6 +58,12 @@ class RemediationApprovalRequest(BaseModel):
 @router.get("/ai/slo")
 async def get_ai_slo(
     force_refresh: bool = Query(False, description="忽略快取，強制重算"),
+    project_id: str = Query(
+        "awoooi",
+        min_length=1,
+        max_length=64,
+        description="租戶 / 專案 ID；預設 AWOOOI 產品線",
+    ),
 ) -> dict:
     """
     取得 AI 決策品質 SLO 最新結果。
@@ -71,20 +77,24 @@ async def get_ai_slo(
         cache_hit       是否命中快取
         metrics[]       三大 SLO 指標明細
     """
-    calc = AiSloCalculator()
+    normalized_project_id = project_id.strip() or "awoooi"
+    calc = AiSloCalculator(project_id=normalized_project_id)
+    adr100_service = get_adr100_slo_status_service(normalized_project_id)
 
     if not force_refresh:
         cached = await calc.get_cached_report()
         if cached:
             data = cached.to_dict()
             data["cache_hit"] = True
-            data["adr100"] = await get_adr100_slo_status_service().fetch_report()
+            data["project_id"] = normalized_project_id
+            data["adr100"] = await adr100_service.fetch_report()
             return data
 
     report = await calc.run()
     data = report.to_dict()
     data["cache_hit"] = False
-    data["adr100"] = await get_adr100_slo_status_service().fetch_report()
+    data["project_id"] = normalized_project_id
+    data["adr100"] = await adr100_service.fetch_report()
     return data
 
 
diff --git a/apps/api/src/services/adr100_slo_status_service.py b/apps/api/src/services/adr100_slo_status_service.py
index 59fa6d1b..252bc6b8 100644
--- a/apps/api/src/services/adr100_slo_status_service.py
+++ b/apps/api/src/services/adr100_slo_status_service.py
@@ -96,6 +96,10 @@ ADR100_SLO_DEFINITIONS: tuple[Adr100SloDefinition, ...] = (
 class Adr100SloStatusService:
     """Fetch ADR-100 SLO status from Prometheus without writing governance events."""
 
+    def __init__(self, project_id: str = "awoooi") -> None:
+        normalized = str(project_id or "awoooi").strip()
+        self.project_id = normalized or "awoooi"
+
     async def fetch_report(self) -> dict[str, Any]:
         prom_url = getattr(
             settings,
@@ -117,6 +121,7 @@ class Adr100SloStatusService:
         return {
             "schema_version": "adr100_slo_status_v1",
             "source": "prometheus+postgresql",
+            "project_id": self.project_id,
             "evaluated_at": now_taipei_iso(),
             "overall_status": overall_status,
             "overall_compliance": overall_compliance,
@@ -193,7 +198,7 @@ class Adr100SloStatusService:
     async def _fetch_verification_coverage(self) -> dict[str, Any]:
         """Summarize whether recent auto-repair executions have verifier evidence."""
         try:
-            async with get_db_context() as db:
+            async with get_db_context(self.project_id) as db:
                 summary_row = (
                     await db.execute(text(_VERIFICATION_COVERAGE_SQL))
                 ).mappings().one()
@@ -754,11 +759,11 @@ def _overall_status(
     return "skipped_low_volume"
 
 
-_adr100_slo_status_service: Adr100SloStatusService | None = None
+_adr100_slo_status_services: dict[str, Adr100SloStatusService] = {}
 
 
-def get_adr100_slo_status_service() -> Adr100SloStatusService:
-    global _adr100_slo_status_service
-    if _adr100_slo_status_service is None:
-        _adr100_slo_status_service = Adr100SloStatusService()
-    return _adr100_slo_status_service
+def get_adr100_slo_status_service(project_id: str = "awoooi") -> Adr100SloStatusService:
+    normalized = str(project_id or "awoooi").strip() or "awoooi"
+    if normalized not in _adr100_slo_status_services:
+        _adr100_slo_status_services[normalized] = Adr100SloStatusService(normalized)
+    return _adr100_slo_status_services[normalized]
diff --git a/apps/api/src/services/ai_slo_calculator.py b/apps/api/src/services/ai_slo_calculator.py
index b8ec06c4..612ffcc9 100644
--- a/apps/api/src/services/ai_slo_calculator.py
+++ b/apps/api/src/services/ai_slo_calculator.py
@@ -47,7 +47,8 @@ SLO_FALSE_NEG_MAX: float = 0.05      # verifier false negative 上限
 SLO_WINDOW_DAYS: int = 7             # 滾動視窗（天）
 SLO_MIN_SAMPLES: int = 5             # 最少樣本數，低於此不計算（資料不足）
 
-REDIS_KEY = "ai:slo:latest"
+DEFAULT_AI_SLO_PROJECT_ID = "awoooi"
+REDIS_KEY_PREFIX = "ai:slo:latest"
 REDIS_TTL_SEC = 300                  # 5 分鐘快取
 
 
@@ -121,6 +122,14 @@ class AiSloCalculator:
             await calc.save_violation_event(report)
     """
 
+    def __init__(self, project_id: str = DEFAULT_AI_SLO_PROJECT_ID) -> None:
+        normalized = str(project_id or DEFAULT_AI_SLO_PROJECT_ID).strip()
+        self.project_id = normalized or DEFAULT_AI_SLO_PROJECT_ID
+
+    @property
+    def redis_key(self) -> str:
+        return f"{REDIS_KEY_PREFIX}:{self.project_id}"
+
     async def calculate(self) -> SloReport:
         """
         計算三大 SLO 指標（7d 滾動視窗）。
@@ -131,7 +140,7 @@ class AiSloCalculator:
         try:
             since = now_taipei() - timedelta(days=SLO_WINDOW_DAYS)
 
-            async with get_db_context() as session:
+            async with get_db_context(self.project_id) as session:
                 slo1 = await self._calc_auto_success_rate(session, since)
                 slo2 = await self._calc_human_override_rate(session, since)
                 slo3 = await self._calc_false_neg_rate(session, since)
@@ -152,6 +161,7 @@ class AiSloCalculator:
 
             logger.info(
                 "slo_calculated",
+                project_id=self.project_id,
                 any_violated=any_violated,
                 slo1=slo1.value,
                 slo2=slo2.value,
@@ -160,7 +170,7 @@ class AiSloCalculator:
             return report
 
         except Exception as e:
-            logger.error("slo_calculation_error", error=str(e))
+            logger.error("slo_calculation_error", project_id=self.project_id, error=str(e))
             # 保守：計算失敗 → 假設違反
             violated_metric = SloMetric(
                 name="calculation_error",
@@ -180,7 +190,7 @@ class AiSloCalculator:
         try:
             from src.core.redis_client import get_redis
             redis = get_redis()
-            raw = await redis.get(REDIS_KEY)
+            raw = await redis.get(self.redis_key)
             if raw:
                 data = json.loads(raw)
                 metrics = [
@@ -210,7 +220,7 @@ class AiSloCalculator:
         try:
             from src.core.redis_client import get_redis
             redis = get_redis()
-            await redis.set(REDIS_KEY, json.dumps(report.to_dict()), ex=REDIS_TTL_SEC)
+            await redis.set(self.redis_key, json.dumps(report.to_dict()), ex=REDIS_TTL_SEC)
         except Exception as e:
             logger.warning("slo_cache_write_error", error=str(e))
 
@@ -221,7 +231,7 @@ class AiSloCalculator:
         只在 any_violated=True 時呼叫。不管舊違反是否解決。
         """
         try:
-            async with get_db_context() as session:
+            async with get_db_context(self.project_id) as session:
                 event = AiGovernanceEvent(
                     event_type="slo_violation",
                     details=report.to_dict(),
@@ -231,6 +241,7 @@ class AiSloCalculator:
                 await session.commit()
                 logger.warning(
                     "slo_violation_recorded",
+                    project_id=self.project_id,
                     violated_metrics=[m.name for m in report.metrics if m.violated],
                 )
         except Exception as e:
diff --git a/apps/api/tests/test_adr100_slo_status_service.py b/apps/api/tests/test_adr100_slo_status_service.py
index 5c6a6a67..53630853 100644
--- a/apps/api/tests/test_adr100_slo_status_service.py
+++ b/apps/api/tests/test_adr100_slo_status_service.py
@@ -88,6 +88,35 @@ async def _low_volume_coverage(self):  # noqa: ANN001
     }
 
 
+@pytest.mark.asyncio
+async def test_verification_coverage_uses_project_scoped_db(monkeypatch):
+    seen: dict[str, str | None] = {}
+
+    class _FailingDbContext:
+        async def __aenter__(self):
+            return self
+
+        async def __aexit__(self, exc_type, exc, tb):
+            return False
+
+        async def execute(self, *_args, **_kwargs):
+            raise RuntimeError("stop_after_project_id_capture")
+
+    def _fake_get_db_context(project_id=None):  # noqa: ANN001
+        seen["project_id"] = project_id
+        return _FailingDbContext()
+
+    monkeypatch.setattr(
+        "src.services.adr100_slo_status_service.get_db_context",
+        _fake_get_db_context,
+    )
+
+    payload = await Adr100SloStatusService(project_id="demo")._fetch_verification_coverage()
+
+    assert seen["project_id"] == "demo"
+    assert payload["status"] == "error"
+
+
 @pytest.mark.asyncio
 async def test_fetch_report_marks_ratio_slos_low_volume(monkeypatch):
     values = {
diff --git a/apps/api/tests/test_ai_slo_calculator.py b/apps/api/tests/test_ai_slo_calculator.py
index b6f4515d..d312d876 100644
--- a/apps/api/tests/test_ai_slo_calculator.py
+++ b/apps/api/tests/test_ai_slo_calculator.py
@@ -8,6 +8,7 @@ from src.jobs.ai_slo_watchdog_job import (
     _is_observation_only_slo_violation,
 )
 from src.services.ai_slo_calculator import (
+    AiSloCalculator,
     SLO_AUTO_SUCCESS_MIN,
     SloMetric,
     SloReport,
@@ -18,6 +19,12 @@ from src.services.ai_slo_calculator import (
 TZ = ZoneInfo("Asia/Taipei")
 
 
+def test_ai_slo_calculator_uses_project_scoped_cache_key():
+    assert AiSloCalculator().project_id == "awoooi"
+    assert AiSloCalculator().redis_key == "ai:slo:latest:awoooi"
+    assert AiSloCalculator(project_id="demo").redis_key == "ai:slo:latest:demo"
+
+
 def _row(
     *,
     created_at: datetime,