diff --git a/CHANGELOG.md b/CHANGELOG.md
index 061425b..fdb6ea8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,8 +7,12 @@ Write each change in both `### English` and `### 中文` under `## Unreleased`.
 
 ### English
 
+- Stop rewriting WorkBuddy `deepseek-v4.1-flash` to the stale `deep-model` upstream ID when the live catalog already exposes the native spelling, so chat no longer silently falls back to other models
+
 ### 中文
 
+- WorkBuddy 在线上目录已原生提供 `deepseek-v4.1-flash` 时，不再把它改写成过期的上游 ID `deep-model`，避免聊天静默落到其他模型
+
 ## 0.5.1 - 2026-09-15
 
 ### English