diff --git a/apps/api/src/repositories/drift_repository.py b/apps/api/src/repositories/drift_repository.py
index a40c16b3..15124c5d 100644
--- a/apps/api/src/repositories/drift_repository.py
+++ b/apps/api/src/repositories/drift_repository.py
@@ -167,6 +167,31 @@ class DriftReportRepository:
                 {"report_id": report_id, "narrative": narrative},
             )
 
+    async def get_repeat_state(self, report: DriftReport) -> dict:
+        """Return stable fingerprint repeat state for a drift report."""
+        from src.services.drift_repeat_state import build_drift_repeat_state
+
+        async with get_db_context() as db:
+            result = await db.execute(
+                text("""
+                    SELECT
+                        report_id,
+                        namespace,
+                        status,
+                        scanned_at,
+                        created_at,
+                        items
+                    FROM drift_reports
+                    WHERE namespace = :namespace
+                      AND created_at > now() - interval '24 hours'
+                    ORDER BY scanned_at DESC
+                    LIMIT 200
+                """),
+                {"namespace": report.namespace},
+            )
+            rows = [dict(row) for row in result.mappings().all()]
+        return build_drift_repeat_state(report, rows)
+
 
 _drift_repo: DriftReportRepository | None = None
 
diff --git a/apps/api/src/services/awooop_truth_chain_service.py b/apps/api/src/services/awooop_truth_chain_service.py
index ed182eb2..91e840d6 100644
--- a/apps/api/src/services/awooop_truth_chain_service.py
+++ b/apps/api/src/services/awooop_truth_chain_service.py
@@ -18,6 +18,7 @@ from sqlalchemy import text
 
 from src.db.base import get_db_context
 from src.services.awooop_ansible_audit_service import build_ansible_truth
+from src.services.drift_repeat_state import build_drift_repeat_state
 
 logger = structlog.get_logger(__name__)
 
@@ -266,6 +267,7 @@ async def fetch_truth_chain(source_id: str, project_id: str = "awoooi") -> dict[
                 created_at,
                 resolved_at,
                 interpretation,
+                items,
                 narrative_text
             FROM drift_reports
             WHERE report_id = :source_id
@@ -473,55 +475,27 @@ async def fetch_truth_chain(source_id: str, project_id: str = "awoooi") -> dict[
             "reports": [],
         }
         if drift is not None:
-            repeat_summary = await _fetch_one(
+            recent_drift_reports = await _fetch_all(
                 db,
                 """
                 SELECT
-                    count(*) AS occurrences_12h,
-                    min(scanned_at) AS first_scanned_at,
-                    max(scanned_at) AS last_scanned_at
+                    report_id,
+                    namespace,
+                    status,
+                    scanned_at,
+                    created_at,
+                    items,
+                    interpretation,
+                    narrative_text
                 FROM drift_reports
-                WHERE created_at > now() - interval '12 hours'
+                WHERE created_at > now() - interval '24 hours'
                   AND namespace = :namespace
-                  AND status = :status
-                  AND high_count = :high_count
-                  AND medium_count = :medium_count
-                  AND info_count = :info_count
-                """,
-                {
-                    "namespace": drift["namespace"],
-                    "status": drift["status"],
-                    "high_count": drift["high_count"],
-                    "medium_count": drift["medium_count"],
-                    "info_count": drift["info_count"],
-                },
-            )
-            repeat_reports = await _fetch_all(
-                db,
-                """
-                SELECT report_id, scanned_at, created_at, status, interpretation, narrative_text
-                FROM drift_reports
-                WHERE created_at > now() - interval '12 hours'
-                  AND namespace = :namespace
-                  AND status = :status
-                  AND high_count = :high_count
-                  AND medium_count = :medium_count
-                  AND info_count = :info_count
                 ORDER BY scanned_at DESC
-                LIMIT 20
+                LIMIT 200
                 """,
-                {
-                    "namespace": drift["namespace"],
-                    "status": drift["status"],
-                    "high_count": drift["high_count"],
-                    "medium_count": drift["medium_count"],
-                    "info_count": drift["info_count"],
-                },
+                {"namespace": drift["namespace"]},
             )
-            drift_repeats = {
-                **(repeat_summary or {}),
-                "reports": repeat_reports,
-            }
+            drift_repeats = build_drift_repeat_state(drift, recent_drift_reports)
 
         gateway_mcp_rows = await _fetch_all(
             db,
diff --git a/apps/api/src/services/drift_narrator_service.py b/apps/api/src/services/drift_narrator_service.py
index e09448e6..8e29651f 100644
--- a/apps/api/src/services/drift_narrator_service.py
+++ b/apps/api/src/services/drift_narrator_service.py
@@ -148,7 +148,13 @@ class DriftNarratorService:
         # 2026-04-18 B 方案: LLM 同時產 narrative + 結構化 items（取代 str()[:30]）
         # 2026-04-20 P0.2: 追加 recommendation（action/confidence/reason）
         narrative, items, recommendation = await self._generate_narrative_and_items(report, interpretation)
-        await self._send_telegram(report, narrative, items, recommendation)
+        repeat_state = None
+        try:
+            from src.repositories.drift_repository import get_drift_repository
+            repeat_state = await get_drift_repository().get_repeat_state(report)
+        except Exception as e:
+            logger.warning("drift_repeat_state_lookup_failed", report_id=report.report_id, error=str(e))
+        await self._send_telegram(report, narrative, items, recommendation, repeat_state)
 
         # 寫入 DB narrative_text (Phase 30 ADR-067)
         try:
@@ -643,6 +649,7 @@ class DriftNarratorService:
         narrative: str,
         items: list[dict],
         recommendation: dict | None = None,
+        repeat_state: dict | None = None,
     ) -> None:
         """
         推送 TYPE-4D Config Drift 卡片（ADR-075）+ B 方案智能摘要
@@ -654,7 +661,7 @@ class DriftNarratorService:
         """
         from src.services.telegram_gateway import get_telegram_gateway
 
-        diff_summary = self._render_telegram_body(report, narrative, items, recommendation)
+        diff_summary = self._render_telegram_body(report, narrative, items, recommendation, repeat_state)
 
         try:
             tg = get_telegram_gateway()
@@ -711,6 +718,7 @@ class DriftNarratorService:
         narrative: str,
         items: list[dict],
         recommendation: dict | None = None,
+        repeat_state: dict | None = None,
     ) -> str:
         """
         組裝 Telegram 卡片 body（B 方案格式 + P0.2 AI 推薦）
@@ -741,6 +749,10 @@ class DriftNarratorService:
             }.get(_act, _act)
             lines.append(f"🎯 AI 建議：{_emoji_action} ({int(_conf * 100)}%) — {_reason}\n")
 
+        repeat_line = self._render_repeat_state(repeat_state)
+        if repeat_line:
+            lines.append(f"{repeat_line}\n")
+
         lines.append(f"🤖 AI 研判\n{narrative}\n")
 
         # 用非 trivial + 非白名單 的實際可操作數顯示
@@ -761,6 +773,23 @@ class DriftNarratorService:
 
         return "\n".join(lines)
 
+    def _render_repeat_state(self, repeat_state: dict | None) -> str:
+        """Render operator-visible repeat/stage metadata for Telegram."""
+        if not repeat_state:
+            return ""
+        fingerprint = str(repeat_state.get("fingerprint") or "unknown")
+        occurrences = int(repeat_state.get("occurrences_12h") or 0)
+        window_hours = int(repeat_state.get("window_hours") or 12)
+        stage = str(repeat_state.get("operator_stage") or "unknown")
+        if occurrences <= 1:
+            repeat_text = f"{window_hours}h 內首次出現"
+        else:
+            repeat_text = f"{window_hours}h 內第 {occurrences} 次同指紋"
+        return (
+            "流程: drift_scanned → ai_analyzed → "
+            f"{stage}\n重複: {repeat_text}\n指紋: {fingerprint}"
+        )
+
 
 # ============================================================
 # Singleton
diff --git a/apps/api/src/services/drift_repeat_state.py b/apps/api/src/services/drift_repeat_state.py
new file mode 100644
index 00000000..36b9ec6b
--- /dev/null
+++ b/apps/api/src/services/drift_repeat_state.py
@@ -0,0 +1,180 @@
+"""Stable repeat identity for Config Drift reports.
+
+The drift scanner emits a fresh ``report_id`` for every run. Operators need a
+stable identity that answers whether two reports describe the same drift, not
+just whether they have the same HIGH/MEDIUM/INFO counts.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+from datetime import datetime, timedelta, timezone
+from typing import Any
+
+
+SCHEMA_VERSION = "drift_repeat_state_v1"
+FINGERPRINT_VERSION = "drift_fingerprint_v1"
+
+
+def _get(obj: Any, key: str, default: Any = None) -> Any:
+    if isinstance(obj, dict):
+        return obj.get(key, default)
+    return getattr(obj, key, default)
+
+
+def _enum_value(value: Any) -> Any:
+    return getattr(value, "value", value)
+
+
+def _jsonable(value: Any) -> Any:
+    value = _enum_value(value)
+    if isinstance(value, dict):
+        return {str(k): _jsonable(v) for k, v in value.items()}
+    if isinstance(value, list):
+        return [_jsonable(v) for v in value]
+    if isinstance(value, tuple):
+        return [_jsonable(v) for v in value]
+    if isinstance(value, datetime):
+        return value.isoformat()
+    return value
+
+
+def _canonical_json(value: Any) -> str:
+    return json.dumps(
+        _jsonable(value),
+        ensure_ascii=False,
+        sort_keys=True,
+        separators=(",", ":"),
+        default=str,
+    )
+
+
+def _parse_datetime(value: Any) -> datetime | None:
+    if value is None:
+        return None
+    if isinstance(value, datetime):
+        parsed = value
+        if parsed.tzinfo is not None:
+            return parsed.astimezone(timezone.utc).replace(tzinfo=None)
+        return parsed
+    if isinstance(value, str):
+        try:
+            parsed = datetime.fromisoformat(value.replace("Z", "+00:00"))
+            if parsed.tzinfo is not None:
+                return parsed.astimezone(timezone.utc).replace(tzinfo=None)
+            return parsed
+        except ValueError:
+            return None
+    return None
+
+
+def _iso(value: Any) -> str | None:
+    parsed = _parse_datetime(value)
+    return parsed.isoformat() if parsed else None
+
+
+def drift_item_identity(item: Any) -> dict[str, Any]:
+    """Return the stable fields that define one drift item."""
+    return {
+        "resource_kind": str(_get(item, "resource_kind", "")),
+        "resource_name": str(_get(item, "resource_name", "")),
+        "namespace": str(_get(item, "namespace", "")),
+        "field_path": str(_get(item, "field_path", "")),
+        "drift_level": str(_enum_value(_get(item, "drift_level", ""))),
+        "git_value": _jsonable(_get(item, "git_value")),
+        "actual_value": _jsonable(_get(item, "actual_value")),
+        "is_allowlisted": bool(_get(item, "is_allowlisted", False)),
+    }
+
+
+def build_drift_fingerprint(namespace: str, items: list[Any]) -> str:
+    """Build a deterministic fingerprint from namespace + sorted drift items."""
+    identities = [drift_item_identity(item) for item in items]
+    identities.sort(key=_canonical_json)
+    payload = {
+        "version": FINGERPRINT_VERSION,
+        "namespace": namespace,
+        "items": identities,
+    }
+    digest = hashlib.sha256(_canonical_json(payload).encode("utf-8")).hexdigest()
+    return f"dfp_{digest[:16]}"
+
+
+def _report_identity(report: Any) -> dict[str, Any]:
+    items = _get(report, "items", []) or []
+    namespace = str(_get(report, "namespace", ""))
+    return {
+        "report_id": _get(report, "report_id"),
+        "namespace": namespace,
+        "status": str(_enum_value(_get(report, "status", ""))),
+        "scanned_at": _get(report, "scanned_at"),
+        "created_at": _get(report, "created_at"),
+        "fingerprint": build_drift_fingerprint(namespace, list(items)),
+    }
+
+
+def build_drift_repeat_state(
+    report: Any,
+    recent_reports: list[Any],
+    *,
+    window_hours: int = 12,
+    max_reports: int = 20,
+) -> dict[str, Any]:
+    """Summarize repeat state for one drift report using stable fingerprints."""
+    current = _report_identity(report)
+    current_time = (
+        _parse_datetime(current.get("scanned_at"))
+        or _parse_datetime(current.get("created_at"))
+        or datetime.now()
+    )
+    cutoff = current_time - timedelta(hours=window_hours)
+
+    by_id: dict[str, dict[str, Any]] = {}
+    for candidate in [report, *recent_reports]:
+        identity = _report_identity(candidate)
+        report_id = str(identity.get("report_id") or "")
+        if not report_id:
+            continue
+        candidate_time = (
+            _parse_datetime(identity.get("scanned_at"))
+            or _parse_datetime(identity.get("created_at"))
+        )
+        if candidate_time is not None and candidate_time < cutoff:
+            continue
+        if identity["fingerprint"] != current["fingerprint"]:
+            continue
+        by_id[report_id] = identity
+
+    matches = sorted(
+        by_id.values(),
+        key=lambda row: (
+            _parse_datetime(row.get("scanned_at"))
+            or _parse_datetime(row.get("created_at"))
+            or datetime.min
+        ),
+    )
+    first = matches[0] if matches else current
+    last = matches[-1] if matches else current
+    status = current.get("status") or "unknown"
+    operator_stage = "pending_human" if status == "pending" else str(status)
+
+    return {
+        "schema_version": SCHEMA_VERSION,
+        "fingerprint": current["fingerprint"],
+        "matching_strategy": "namespace_and_stable_items_v1",
+        "window_hours": window_hours,
+        "occurrences_12h": len(matches),
+        "first_scanned_at": _iso(first.get("scanned_at") or first.get("created_at")),
+        "last_scanned_at": _iso(last.get("scanned_at") or last.get("created_at")),
+        "operator_stage": operator_stage,
+        "reports": [
+            {
+                "report_id": row.get("report_id"),
+                "scanned_at": _iso(row.get("scanned_at")),
+                "created_at": _iso(row.get("created_at")),
+                "status": row.get("status"),
+            }
+            for row in reversed(matches[-max_reports:])
+        ],
+    }
diff --git a/apps/api/tests/test_awooop_truth_chain_service.py b/apps/api/tests/test_awooop_truth_chain_service.py
index a2d09172..a3097c41 100644
--- a/apps/api/tests/test_awooop_truth_chain_service.py
+++ b/apps/api/tests/test_awooop_truth_chain_service.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from datetime import datetime, timedelta, timezone
 from types import SimpleNamespace
 
 from src.services.awooop_ansible_audit_service import (
@@ -7,6 +8,10 @@ from src.services.awooop_ansible_audit_service import (
     build_ansible_truth,
 )
 from src.services.awooop_truth_chain_service import _clean_row, _truth_status
+from src.services.drift_repeat_state import (
+    build_drift_fingerprint,
+    build_drift_repeat_state,
+)
 
 
 def test_clean_row_parses_json_text_fields_for_gateway_visibility() -> None:
@@ -69,6 +74,89 @@ def test_truth_status_marks_repeated_pending_drift_as_human_needed() -> None:
     assert "drift_ai_confidence_zero" in status["blockers"]
 
 
+def _drift_item(
+    *,
+    resource_name: str = "awoooi-api",
+    field_path: str = "spec.template.spec.containers[0].image",
+    actual_value: str = "api:hotfix",
+) -> dict:
+    return {
+        "resource_kind": "Deployment",
+        "resource_name": resource_name,
+        "namespace": "awoooi-prod",
+        "field_path": field_path,
+        "git_value": "api:main",
+        "actual_value": actual_value,
+        "drift_level": "high",
+        "is_allowlisted": False,
+    }
+
+
+def test_drift_fingerprint_is_stable_across_item_order() -> None:
+    item_a = _drift_item(resource_name="awoooi-api")
+    item_b = _drift_item(
+        resource_name="awoooi-worker",
+        field_path="spec.template.spec.serviceAccountName",
+        actual_value="awoooi-executor",
+    )
+
+    first = build_drift_fingerprint("awoooi-prod", [item_a, item_b])
+    second = build_drift_fingerprint("awoooi-prod", [item_b, item_a])
+    changed = build_drift_fingerprint(
+        "awoooi-prod",
+        [item_a, {**item_b, "actual_value": "different-service-account"}],
+    )
+
+    assert first == second
+    assert first.startswith("dfp_")
+    assert first != changed
+
+
+def test_drift_repeat_state_counts_matching_fingerprint_only() -> None:
+    now = datetime(2026, 5, 13, 1, 0, tzinfo=timezone.utc)
+    report = {
+        "report_id": "drift-now",
+        "namespace": "awoooi-prod",
+        "status": "pending",
+        "scanned_at": now,
+        "created_at": now,
+        "items": [_drift_item()],
+    }
+    recent = [
+        {
+            **report,
+            "report_id": "drift-prev",
+            "scanned_at": now - timedelta(hours=1),
+            "created_at": now - timedelta(hours=1),
+        },
+        {
+            **report,
+            "report_id": "drift-different",
+            "scanned_at": now - timedelta(hours=2),
+            "created_at": now - timedelta(hours=2),
+            "items": [_drift_item(actual_value="api:other")],
+        },
+        {
+            **report,
+            "report_id": "drift-old",
+            "scanned_at": now - timedelta(hours=13),
+            "created_at": now - timedelta(hours=13),
+        },
+    ]
+
+    repeat_state = build_drift_repeat_state(report, recent)
+
+    assert repeat_state["schema_version"] == "drift_repeat_state_v1"
+    assert repeat_state["fingerprint"].startswith("dfp_")
+    assert repeat_state["matching_strategy"] == "namespace_and_stable_items_v1"
+    assert repeat_state["occurrences_12h"] == 2
+    assert repeat_state["operator_stage"] == "pending_human"
+    assert [row["report_id"] for row in repeat_state["reports"]] == [
+        "drift-now",
+        "drift-prev",
+    ]
+
+
 def test_ansible_truth_surfaces_audited_check_mode_record() -> None:
     truth = build_ansible_truth(
         [