diff --git a/Task-21-Quant-UX%E5%8E%9F%E5%9E%8B%E6%9C%AC%E5%9C%B0HTML%E5%AE%A1%E6%A0%B8%E5%BF%AB%E7%85%A7.-.md b/Task-21-Quant-UX%E5%8E%9F%E5%9E%8B%E6%9C%AC%E5%9C%B0HTML%E5%AE%A1%E6%A0%B8%E5%BF%AB%E7%85%A7.-.md
index a8afc2f..07d853f 100644
--- a/Task-21-Quant-UX%E5%8E%9F%E5%9E%8B%E6%9C%AC%E5%9C%B0HTML%E5%AE%A1%E6%A0%B8%E5%BF%AB%E7%85%A7.-.md
+++ b/Task-21-Quant-UX%E5%8E%9F%E5%9E%8B%E6%9C%AC%E5%9C%B0HTML%E5%AE%A1%E6%A0%B8%E5%BF%AB%E7%85%A7.-.md
@@ -73,3 +73,4 @@
 - 结果：通过
 - 日期：2026-08-17
 - 确认来源：用户明确回复“通过验收 #21”
+- `cdf83fd` docs: archive acceptance for prototype snapshots (#21)