diff --git a/readme.md b/readme.md
index 470682d..cb0690c 100644
--- a/readme.md
+++ b/readme.md
@@ -11,6 +11,26 @@
 |v0.3 β|support vmc|
 |v0.4 β|support at|
 
+## at
+
+the player data is stored in the pds.
+
+```sh
+├── [yui.syui.ai]
+│   ├── ai.syui.game.user
+│   │   ├── lv
+│   │   ├── hp
+│   │   └── coin
+│   └── ai.syui.game.login
+│       ├── login <bool>
+│       ├── updatedAt
+│       └── username
+└─── [user.bsky.social]
+     └── ai.syui.game
+        ├── account <at://yui.syui.ai...>
+        └── createdAt
+```
+
 ## service
 
 |title|url|