docs(im): document chat.nickname get/update/delete (#1378)

internal/registry/scope_priorities.json

@@ -5609,6 +5609,21 @@
     "final_score": "80.0587",
     "recommend": "false"
   },
+  {
+    "scope_name": "im:chat.nickname:read",
+    "final_score": "88.0587",
+    "recommend": "true"
+  },
+  {
+    "scope_name": "im:chat.nickname:write",
+    "final_score": "79.5982",
+    "recommend": "true"
+  },
+  {
+    "scope_name": "im:chat.user_setting:write",
+    "final_score": "83.6587",
+    "recommend": "true"
+  },
   {
     "scope_name": "im:chat.user_setting:read",
     "final_score": "88.0587",

skills/lark-im/SKILL.md

@@ -149,6 +149,12 @@ lark-cli im <resource> <method> [flags] # 调用 API
   - `batch_query` — 批量查询当前用户在群内的个人偏好设置 (e.g. `is_muted` mutes normal messages, `is_mute_at_all` mutes @all messages); up to 10 chats per request. Identity: `user` only (`user_access_token`); the caller must be in each target chat.
   - `batch_update` — 批量更新当前用户在群内的个人偏好设置 (e.g. `is_muted` mutes normal messages, `is_mute_at_all` mutes @all messages); up to 10 chats per request. Identity: `user` only (`user_access_token`); the caller must be in each target chat.
 
+### chat.nickname
+
+  - `get` — 获取自己的群昵称。Get your own nickname in the chat (self-only). Identity: `user` only (`user_access_token`); returns an empty string when no nickname is set.
+  - `update` — 设置自己的群昵称。Set or update your own nickname in the chat (self-only). Identity: `user` only (`user_access_token`); `nickname` must be a non-empty string (max 300 bytes). Use DELETE to clear it.
+  - `delete` — 清空自己的群昵称。Clear your own nickname in the chat (self-only). Identity: `user` only (`user_access_token`).
+
 ### chat.managers
 
   - `add_managers` — 指定群管理员。Identity: supports `user` and `bot`; only the group owner can add managers; max 10 managers per chat (20 for super-large chats), and at most 5 bots per request.