diff --git a/apps/api/src/jobs/ai_slo_watchdog_job.py b/apps/api/src/jobs/ai_slo_watchdog_job.py
index 02b1bc6a..74978187 100644
--- a/apps/api/src/jobs/ai_slo_watchdog_job.py
+++ b/apps/api/src/jobs/ai_slo_watchdog_job.py
@@ -79,8 +79,16 @@ async def _check_once() -> None:
     except Exception as e:
         logger.warning("watchdog_w3_flywheel_check_failed", error=str(e))
 
+    # W-4: 無 APPROVED Playbook（自動修復鏈路斷裂）
+    try:
+        approved_count = await _count_approved_playbooks()
+        if approved_count == 0:
+            violations.append("無 APPROVED Playbook — 自動修復鏈路斷裂（evolver 可能全部封存）")
+    except Exception as e:
+        logger.warning("watchdog_w4_playbook_check_failed", error=str(e))
+
     if not violations:
-        logger.debug("ai_slo_watchdog_all_ok", checks=3)
+        logger.debug("ai_slo_watchdog_all_ok", checks=4)
         return
 
     # 去重：violations 相同內容 1 小時內不重複發
@@ -146,3 +154,13 @@ async def _count_pending_no_tg_sent() -> int:
             silent += 1
 
     return silent
+
+
+async def _count_approved_playbooks() -> int:
+    """查詢 APPROVED 狀態 Playbook 數量，為 0 代表自動修復鏈路斷裂。"""
+    from sqlalchemy import text as sa_text
+    async with get_db_context() as db:
+        result = await db.execute(
+            sa_text("SELECT COUNT(*) FROM playbooks WHERE status = 'approved'")
+        )
+        return result.scalar() or 0
diff --git a/apps/api/src/services/alert_rule_engine.py b/apps/api/src/services/alert_rule_engine.py
index c8cda91e..5a2e6cd5 100644
--- a/apps/api/src/services/alert_rule_engine.py
+++ b/apps/api/src/services/alert_rule_engine.py
@@ -716,6 +716,10 @@ async def auto_generate_rule(
         success = _append_rule_to_yaml(yaml_block, alertname_safe)
         if success:
             logger.info("auto_rule_success", alertname=alertname_safe, rule_id=rule_id)
+            # 立即為新規則建立 APPROVED Playbook（不等下次重啟）
+            import asyncio as _asyncio
+            from src.services.playbook_seed_service import seed_playbooks_from_rules
+            _asyncio.create_task(seed_playbooks_from_rules())
         else:
             logger.warning("auto_rule_failed_validation", alertname=alertname_safe)
 
diff --git a/apps/api/src/services/playbook_evolver.py b/apps/api/src/services/playbook_evolver.py
index bcd439b9..3859a7bf 100644
--- a/apps/api/src/services/playbook_evolver.py
+++ b/apps/api/src/services/playbook_evolver.py
@@ -28,7 +28,7 @@ from datetime import timedelta
 
 import structlog
 
-from src.models.playbook import Playbook, PlaybookStatus
+from src.models.playbook import Playbook, PlaybookSource, PlaybookStatus
 from src.utils.timezone import now_taipei
 
 logger = structlog.get_logger(__name__)
@@ -129,6 +129,8 @@ async def _archive_low_trust(playbooks: list[Playbook], report: EvolverReport) -
     for pb in playbooks:
         if pb.status == PlaybookStatus.DEPRECATED:
             continue
+        if pb.source == PlaybookSource.YAML_RULE:
+            continue  # yaml_rule playbooks 由 seeder 管理，不受 trust 封存，保護自動修復鏈路
         if pb.trust_score < TRUST_ARCHIVE_THRESHOLD:
             try:
                 await service.update_with_validation(
@@ -164,6 +166,8 @@ async def _archive_dormant(playbooks: list[Playbook], report: EvolverReport) ->
     for pb in playbooks:
         if pb.status == PlaybookStatus.DEPRECATED:
             continue
+        if pb.source == PlaybookSource.YAML_RULE:
+            continue  # yaml_rule playbooks 由 seeder 管理，不受休眠封存，保護自動修復鏈路
         if pb.last_used_at is None:
             # 從未使用過 — 只在 trust 低於閾值時封存
             if pb.trust_score >= DORMANT_TRUST_THRESHOLD:
diff --git a/apps/api/src/services/playbook_seed_service.py b/apps/api/src/services/playbook_seed_service.py
index 2f45b2fa..0417ce6c 100644
--- a/apps/api/src/services/playbook_seed_service.py
+++ b/apps/api/src/services/playbook_seed_service.py
@@ -49,7 +49,10 @@ async def seed_playbooks_from_rules() -> None:
         from sqlalchemy import text as sa_text
         async with get_db_context() as db:
             rows = await db.execute(
-                sa_text("SELECT name FROM playbooks WHERE source = 'yaml_rule'")
+                sa_text(
+                    "SELECT name FROM playbooks WHERE source = 'yaml_rule'"
+                    " AND status != 'deprecated'"
+                )
             )
             existing_names = {r[0] for r in rows.fetchall()}