diff --git a/docs/NOTIFICATIONS.md b/docs/NOTIFICATIONS.md
index 8261730..207056e 100644
--- a/docs/NOTIFICATIONS.md
+++ b/docs/NOTIFICATIONS.md
@@ -17,6 +17,10 @@
 
 ## 各渠道設計
 
+> **實作狀態 (2026-06-23)：** Email (SMTP/MailKit) + Line 已於 API 端實作，見
+> [docs/superpowers/specs/2026-06-23-notification-service-email-line-design.md](superpowers/specs/2026-06-23-notification-service-email-line-design.md)。
+> 本檔早期願景中的 SendGrid/Push/SMS 仍為未來規劃。
+
 ### Email (SendGrid)
 
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