diff --git a/repos_extra/frontpage/readme.md b/repos_extra/frontpage/readme.md
index 6af62f3..04e5a87 100644
--- a/repos_extra/frontpage/readme.md
+++ b/repos_extra/frontpage/readme.md
@@ -12,6 +12,9 @@ $ cd $dir
 
 ## first setting
 
+- https://o.syui.ai
+- https://at.syu.is/at/syui.ai/ai.syui.o.post
+
 ```sh
 $ cd $dir
 $ nvm use 20
@@ -214,6 +217,15 @@ async fn process(message: Vec<u8>, ctx: &mut Context) -> Result<i64, ProcessErro
 
 ## other
 
+### delete record
+
+```sh
+# at://did:plc:uqzpqmrjnptsxezjx4xuh2mn/ai.syui.o.post/3lafos6to6y2y
+$ git clone https://git.syui.ai/ai/bot
+$ cargo build
+$ ./target/debug/ai delete 3lafos6to6y2y -c ai.syui.o.post
+```
+
 ### license view
 
 ```html