diff --git a/insta-lab/app/internal_router.py b/insta-lab/app/internal_router.py
index f4e00ae..9888382 100644
--- a/insta-lab/app/internal_router.py
+++ b/insta-lab/app/internal_router.py
@@ -10,18 +10,50 @@ from __future__ import annotations
 
 import json
 import logging
+import os
 from typing import Optional
 
 from fastapi import APIRouter, Depends, HTTPException
 from pydantic import BaseModel, Field
 
-from . import db
+from . import config, db
 from .auth import verify_internal_key
 
 logger = logging.getLogger(__name__)
 router = APIRouter()
 
 
+def _register_rendered_assets(slate_id: int) -> int:
+    """워커가 저장한 10장 PNG를 card_assets로 등록.
+
+    cutover(2026-05-19) 후 렌더는 Windows insta-render 워커가 NAS SMB 볼륨에
+    직접 쓰지만, NAS DB에 card_assets를 등록하는 단계가 누락됐었다. 이 함수가
+    그 갭을 메운다. 워커 출력 경로 후보를 순서대로 스캔해 실제 파일만 등록한다
+    (경로 정합 가드: CARDS_DIR 하위 / INSTA_DATA_PATH 직하 둘 다 수용).
+
+    저장하는 file_path는 insta-lab 컨테이너 내부 절대경로 →
+    get_asset(FileResponse) / package(zip)가 그대로 읽는다.
+    """
+    candidates = [
+        os.path.join(config.CARDS_DIR, str(slate_id)),       # /app/data/insta_cards/{id}
+        os.path.join(config.INSTA_DATA_PATH, str(slate_id)),  # /app/data/{id}
+    ]
+    for base in candidates:
+        if not os.path.isdir(base):
+            continue
+        count = 0
+        for page in range(1, 11):
+            fp = os.path.join(base, f"{page:02d}.png")
+            if os.path.exists(fp) and os.path.getsize(fp) > 0:
+                db.add_card_asset(slate_id, page, fp)
+                count += 1
+        if count:
+            logger.info("card_assets 등록: slate=%s pages=%d dir=%s", slate_id, count, base)
+            return count
+    logger.warning("렌더 PNG를 찾지 못함: slate=%s (후보=%s)", slate_id, candidates)
+    return 0
+
+
 class UpdatePayload(BaseModel):
     task_id: str
     status: str = Field(..., description="processing|succeeded|failed")
@@ -56,12 +88,16 @@ def insta_update(payload: UpdatePayload):
         result_id=result_id,
         error=payload.error,
     )
-    # succeeded 시 slate_status도 'rendered'로 갱신 (cutover 후 NAS가 처리)
+    # succeeded 시 slate_status도 'rendered'로 갱신 + card_assets 등록 (cutover 후 NAS가 처리)
     if payload.status == "succeeded" and result_id is not None:
         try:
             db.update_slate_status(result_id, "rendered")
         except Exception:
             logger.exception("update_slate_status %s 실패 (무시)", result_id)
+        try:
+            _register_rendered_assets(result_id)
+        except Exception:
+            logger.exception("card_assets 등록 %s 실패 (무시)", result_id)
     logger.info(
         "internal/insta/update task=%s status=%s progress=%d",
         payload.task_id, payload.status, payload.progress,
diff --git a/insta-lab/tests/test_internal_router.py b/insta-lab/tests/test_internal_router.py
index b7c5994..b693b30 100644
--- a/insta-lab/tests/test_internal_router.py
+++ b/insta-lab/tests/test_internal_router.py
@@ -78,3 +78,55 @@ def test_update_failed_records_error(client):
     task = db.get_task(tid)
     assert task["status"] == "failed"
     assert "Chromium" in (task.get("error") or "")
+
+
+def test_succeeded_registers_card_assets(client, tmp_path, monkeypatch):
+    """succeeded 시 워커가 쓴 PNG들을 card_assets로 등록 (cutover 후 누락된 단계)."""
+    from app import config
+
+    # FK 충족용 실제 슬레이트
+    sid = db.add_card_slate({"keyword": "금리", "category": "economy"})
+    # 워커가 PNG 10장을 쓴 디렉토리 시뮬 (CARDS_DIR/{sid})
+    cards_root = tmp_path / "insta_cards"
+    sdir = cards_root / str(sid)
+    sdir.mkdir(parents=True)
+    for p in range(1, 11):
+        (sdir / f"{p:02d}.png").write_bytes(b"\x89PNG\r\n\x1a\n" + b"x" * 100)
+    monkeypatch.setattr(config, "CARDS_DIR", str(cards_root))
+    monkeypatch.setattr(config, "INSTA_DATA_PATH", str(tmp_path))
+
+    tid = db.create_task("slate_render", {"slate_id": sid})
+    r = client.post(
+        "/api/internal/insta/update",
+        headers={"X-Internal-Key": "test-secret"},
+        json={
+            "task_id": tid,
+            "status": "succeeded",
+            "progress": 100,
+            "result_path": f"/media/insta/{sid}/01.png",
+        },
+    )
+    assert r.status_code == 200
+    assets = db.list_card_assets(sid)
+    assert len(assets) == 10
+    assert assets[0]["page_index"] == 1
+    assert assets[0]["file_path"].endswith("01.png")
+    assert db.get_card_slate(sid)["status"] == "rendered"
+
+
+def test_succeeded_no_files_registers_nothing(client, tmp_path, monkeypatch):
+    """워커 출력이 없으면(파일 미존재) 잘못된 asset 등록 금지 — 200은 유지."""
+    from app import config
+
+    sid = db.add_card_slate({"keyword": "환율", "category": "economy"})
+    monkeypatch.setattr(config, "CARDS_DIR", str(tmp_path / "insta_cards"))
+    monkeypatch.setattr(config, "INSTA_DATA_PATH", str(tmp_path))
+
+    tid = db.create_task("slate_render", {"slate_id": sid})
+    r = client.post(
+        "/api/internal/insta/update",
+        headers={"X-Internal-Key": "test-secret"},
+        json={"task_id": tid, "status": "succeeded", "progress": 100},
+    )
+    assert r.status_code == 200
+    assert db.list_card_assets(sid) == []