commit f92a173e79bffd114239eba3c67fad1d329726bb
Author: secrer890cu <secrer890cu@example.com>
Date:   Sun Sep 27 10:12:02 2026 +0000

    add notes

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