diff --git a/docs/design/07-spawner-acquire-first.md b/docs/design/07-spawner-acquire-first.md
index 1eec1cc..82454f9 100644
--- a/docs/design/07-spawner-acquire-first.md
+++ b/docs/design/07-spawner-acquire-first.md
@@ -235,7 +235,7 @@ def _revive_session(agent_id: str) -> bool:
 
 ### 4.5 O5: compact 检测（§15 rotation-only v3）
 
-§15 设计文档：`docs/design/24-compact-detection-fix.md`
+§15 设计文档：`docs/design/15-compact-detection-fix.md`
 
 **检测方法**：读 gateway 日志尾部 2MB，按 sessionKey 过滤 `[compaction] rotated active transcript` 事件。
 如果最近的 rotation 事件在 120s 窗口内 → 视为 compact 循环进行中（可能还在 post-compact retry）。