diff --git a/apps/api/src/api/v1/stats.py b/apps/api/src/api/v1/stats.py
index 6e582f0d..ff758a0f 100644
--- a/apps/api/src/api/v1/stats.py
+++ b/apps/api/src/api/v1/stats.py
@@ -406,6 +406,20 @@ class MonthlyReportPreviewResponse(BaseModel):
     formatted_preview: str = Field(default="", description="Telegram HTML no-send preview")
 
 
+class SreDigestPreviewResponse(BaseModel):
+    """AwoooI SRE 戰情室 digest no-send preview 回應"""
+
+    report_date: str = Field(description="報告日期時間")
+    source_ok_count: int = Field(default=0, description="報表資料源可讀數")
+    source_total_count: int = Field(default=0, description="報表資料源總數")
+    source_confidence_percent: int = Field(default=0, description="報表資料源可信度")
+    source_gap_ids: list[str] = Field(default_factory=list, description="報表資料源缺口工作項")
+    no_send_preview_count: int = Field(default=0, description="日 / 週 / 月 no-send preview 數量")
+    live_send_allowed_count: int = Field(default=0, description="允許實發數")
+    runtime_gate_count: int = Field(default=0, description="runtime gate 數")
+    formatted_preview: str = Field(default="", description="Telegram HTML no-send preview")
+
+
 def _report_source_preview_fields(source_health: dict[str, Any] | None) -> dict[str, Any]:
     source_health = source_health or {}
     rollups = source_health.get("rollups") or {}
@@ -419,6 +433,8 @@ def _report_source_preview_fields(source_health: dict[str, Any] | None) -> dict[
             if source.get("work_item_id")
         ][:5],
         "no_send_preview_count": int(rollups.get("no_send_preview_count") or 0),
+        "live_send_allowed_count": int(rollups.get("live_send_allowed_count") or 0),
+        "runtime_gate_count": int(rollups.get("runtime_gate_count") or 0),
     }
 
 
@@ -485,6 +501,40 @@ async def preview_monthly_report(
     )
 
 
+@router.get(
+    "/sre-digest/preview",
+    response_model=SreDigestPreviewResponse,
+    summary="預覽 AwoooI SRE 戰情室 digest",
+)
+async def preview_sre_digest(
+    service: DailyReportDep = None,
+) -> SreDigestPreviewResponse:
+    """
+    預覽 AwoooI SRE 戰情室 digest (不發送)
+
+    收斂日報 / 週報 / 月報 source health、資產沉澱與工作項，不寫 Gateway queue。
+    """
+    from src.utils.timezone import now_taipei
+
+    source_health = await service.collect_report_source_health(days=30)
+    preview_fields = _report_source_preview_fields(source_health)
+    now = now_taipei()
+    return SreDigestPreviewResponse(
+        report_date=now.strftime("%Y-%m-%d %H:%M"),
+        source_ok_count=preview_fields["source_ok_count"],
+        source_total_count=preview_fields["source_total_count"],
+        source_confidence_percent=preview_fields["source_confidence_percent"],
+        source_gap_ids=preview_fields["source_gap_ids"],
+        no_send_preview_count=preview_fields["no_send_preview_count"],
+        live_send_allowed_count=preview_fields["live_send_allowed_count"],
+        runtime_gate_count=preview_fields["runtime_gate_count"],
+        formatted_preview=service.format_sre_digest_preview(
+            source_health,
+            generated_at=now,
+        ),
+    )
+
+
 @router.get(
     "/weekly/preview",
     response_model=WeeklyReportResponse,
diff --git a/apps/api/src/services/report_generation_service.py b/apps/api/src/services/report_generation_service.py
index 3a1c39d9..783e8166 100644
--- a/apps/api/src/services/report_generation_service.py
+++ b/apps/api/src/services/report_generation_service.py
@@ -375,6 +375,54 @@ class ReportGenerationService:
         ]
         return "\n".join(lines)
 
+    def format_sre_digest_preview(
+        self,
+        source_health: dict[str, Any] | None,
+        *,
+        generated_at: datetime | None = None,
+    ) -> str:
+        """Format an AwoooI SRE war-room no-send digest preview."""
+        now = generated_at or now_taipei()
+        source_health = source_health or {}
+        rollups = source_health.get("rollups") or {}
+        ok_count = int(rollups.get("source_ok_count") or 0)
+        total_count = int(rollups.get("source_count") or 0)
+        gap_count = int(rollups.get("source_gap_count") or 0)
+        confidence = int(rollups.get("confidence_percent") or 0)
+        preview_count = int(rollups.get("no_send_preview_count") or 0)
+        work_items = source_health.get("work_items") or []
+        gap_ids = [
+            str(item.get("work_item_id"))
+            for item in work_items
+            if item.get("work_item_id")
+        ][:5]
+        gap_text = ", ".join(gap_ids) if gap_ids else "無"
+
+        lines = [
+            "<b>🛡️ AwoooI SRE 戰情室 digest no-send preview</b>",
+            f"<b>{now.strftime('%Y-%m-%d %H:%M')}</b> 台北時間",
+            "",
+            "<b>📡 資料源健康</b>",
+            f"  來源: <code>{ok_count}/{total_count}</code> | 缺口: {gap_count} | 信心: <b>{confidence}%</b>",
+            f"  工作項: {html.escape(gap_text)}",
+            "",
+            "<b>🗓️ 日 / 週 / 月報狀態</b>",
+            f"  no-send preview: {preview_count} 份",
+            "  live Telegram send: 0",
+            "  Gateway queue write: 0",
+        ]
+        lines.extend(self._format_report_source_health_block(source_health))
+        lines += [
+            "",
+            "<b>🧭 下一步</b>",
+            "  1. 補齊 report-source-gap 專屬 PlayBook 與 Verifier readback。",
+            "  2. Owner review 後才允許 SRE digest 實發批准包。",
+            "  3. 任何中低風險自動處理仍需 rollback / post-check / audit receipt。",
+            "",
+            "<i>只讀草案：不發 Telegram、不寫 Gateway queue、不改排程、不啟動 runtime gate。</i>",
+        ]
+        return "\n".join(lines)
+
     def format_daily_report(
         self,
         kpi: DailyKpi,
diff --git a/apps/api/tests/test_report_generation_service.py b/apps/api/tests/test_report_generation_service.py
index 7fe0e467..31a5ba3c 100644
--- a/apps/api/tests/test_report_generation_service.py
+++ b/apps/api/tests/test_report_generation_service.py
@@ -318,6 +318,46 @@ class TestFormatDailyReport:
         assert "Verifier: source_health_ready 1/2" in report
         assert "不代表已授權發送或自動修復" in report
 
+    def test_sre_digest_preview_contains_assets_and_boundaries(self):
+        """SRE 戰情室 digest 應收斂缺口、資產與 no-send 邊界"""
+        source_health = {
+            "rollups": {
+                "source_ok_count": 2,
+                "source_count": 5,
+                "source_gap_count": 3,
+                "confidence_percent": 40,
+                "no_send_preview_count": 3,
+            },
+            "source_health": [
+                {"work_item_id": "report-source-gap:incident_summary"},
+            ],
+            "work_items": [
+                {"work_item_id": "report-source-gap:incident_summary"},
+                {"work_item_id": "report-source-gap:ai_performance"},
+            ],
+            "automation_assets": [
+                {"label": "KM", "state": "draft_ready", "done_count": 3, "blocked_count": 2},
+                {"label": "PlayBook", "state": "draft_required", "done_count": 0, "blocked_count": 2},
+                {"label": "Verifier", "state": "source_health_ready", "done_count": 1, "blocked_count": 2},
+            ],
+        }
+        svc = ReportGenerationService()
+        report = svc.format_sre_digest_preview(
+            source_health,
+            generated_at=datetime(2026, 6, 18, 10, 0, tzinfo=_TZ_TAIPEI),
+        )
+
+        assert "AwoooI SRE 戰情室 digest no-send preview" in report
+        assert "來源: <code>2/5</code>" in report
+        assert "report-source-gap:incident_summary" in report
+        assert "live Telegram send: 0" in report
+        assert "Gateway queue write: 0" in report
+        assert "KM: draft_ready 3/5" in report
+        assert "PlayBook: draft_required 0/2" in report
+        assert "Verifier: source_health_ready 1/3" in report
+        assert "不發 Telegram" in report
+        assert "不啟動 runtime gate" in report
+
 
 # =============================================================================
 # format_postmortem
diff --git a/apps/api/tests/test_weekly_report_preview_api.py b/apps/api/tests/test_weekly_report_preview_api.py
index 0d0ff103..4816f78c 100644
--- a/apps/api/tests/test_weekly_report_preview_api.py
+++ b/apps/api/tests/test_weekly_report_preview_api.py
@@ -70,3 +70,31 @@ def test_monthly_report_preview_exposes_source_health_no_send_preview():
     assert f"來源: <code>{data['source_ok_count']}/{data['source_total_count']}</code>" in preview
     assert "實發: 0" in preview
     assert "不代表已授權發送或自動修復" in preview
+
+
+def test_sre_digest_preview_exposes_source_health_no_send_preview():
+    client = TestClient(app)
+    response = client.get("/api/v1/stats/sre-digest/preview")
+
+    assert response.status_code == 200
+    data = response.json()
+    assert "report_date" in data
+    assert "source_ok_count" in data
+    assert "source_total_count" in data
+    assert "source_confidence_percent" in data
+    assert "source_gap_ids" in data
+    assert "no_send_preview_count" in data
+    assert "live_send_allowed_count" in data
+    assert "runtime_gate_count" in data
+    assert "formatted_preview" in data
+    assert data["live_send_allowed_count"] == 0
+    assert data["runtime_gate_count"] == 0
+
+    preview = data["formatted_preview"]
+    assert "AwoooI SRE 戰情室 digest no-send preview" in preview
+    assert "報表資料源 / 沉澱" in preview
+    assert f"來源: <code>{data['source_ok_count']}/{data['source_total_count']}</code>" in preview
+    assert "live Telegram send: 0" in preview
+    assert "Gateway queue write: 0" in preview
+    assert "不發 Telegram" in preview
+    assert "不啟動 runtime gate" in preview