diff --git a/app/repositories/analytics_selfstat.py b/app/repositories/analytics_selfstat.py
new file mode 100644
index 0000000..ee2a1e4
--- /dev/null
+++ b/app/repositories/analytics_selfstat.py
@@ -0,0 +1,38 @@
+"""自报计数快照落库。一次事务:插 1 条快照头 + N 条 event 行,返回快照 id。"""
+from __future__ import annotations
+
+from sqlalchemy.orm import Session
+
+from app.models.analytics_selfstat import AnalyticsSelfStat, AnalyticsSelfStatEvent
+from app.schemas.analytics_selfstat import SelfStatBatchIn
+
+
+def record_selfstat(db: Session, batch: SelfStatBatchIn) -> int:
+    snap = AnalyticsSelfStat(
+        device_id=batch.device_id,
+        epoch_id=batch.epoch_id,
+        app_ver=batch.app_ver,
+        oem=batch.oem,
+        os=batch.os,
+        batches_attempted=batch.batches_attempted,
+        batches_ok=batch.batches_ok,
+        batches_fail=batch.batches_fail,
+        retries=batch.retries,
+        queue_depth=batch.queue_depth,
+        sent_at=batch.sent_at,
+    )
+    db.add(snap)
+    db.flush()  # 拿到 snap.id
+    db.add_all([
+        AnalyticsSelfStatEvent(
+            snapshot_id=snap.id,
+            event=e.event,
+            attempted=e.attempted,
+            drop_capture=e.drop_capture,
+            delivered=e.delivered,
+            drop_undelivered=e.drop_undelivered,
+        )
+        for e in batch.events
+    ])
+    db.commit()
+    return snap.id