Refine discussion closure messaging

plans/CSM.md

@@ -255,10 +255,11 @@ After callback:
 [Discussion Idle]
 
 No agent responded in the latest discussion round.
-If the discussion goal has been achieved, the initiator should now:
+If the discussion goal has already been achieved, the initiator should now:
 1. write the discussion summary to a file in the workspace
 2. call discuss-callback with the summary file path
 
+This reminder does not mean the discussion was automatically summarized or closed.
 If more discussion is still needed, continue the discussion in this channel.
 ```
 
@@ -284,6 +285,7 @@ If more discussion is still needed, continue the discussion in this channel.
 This discussion channel has been closed.
 It is now kept for archive/reference only.
 Further discussion in this channel is ignored.
+If follow-up work is needed, continue it from the origin work channel instead.
 ```
 
 这部分实现明确采用已有“在指定 session 上临时覆盖为 no-reply 模型”的方式，而不是修改 Agent 的全局默认模型。

plans/TASKLIST.md

@@ -152,9 +152,9 @@
 - [x] 模板中明确 `discuss-callback(summaryPath)` 调用要求
 
 #### A10.2 idle reminder
-- [. ] 定稿 discussion idle 模板
-- [. ] 模板中提醒 initiator：写总结文件并 callback
-- [. ] 避免提醒文案歧义或像自动总结器
+- [x] 定稿 discussion idle 模板
+- [x] 模板中提醒 initiator：写总结文件并 callback
+- [x] 避免提醒文案歧义或像自动总结器
 
 #### A10.3 origin callback message
 - [x] 定稿发回原工作 channel 的结果通知模板
@@ -163,8 +163,8 @@
 - [x] 模板中明确“继续基于该总结文件推进原任务”
 
 #### A10.4 closed reply
-- [. ] 定稿 closed channel 固定回复模板
-- [. ] 明确 channel 已关闭，仅做留档使用
+- [x] 定稿 closed channel 固定回复模板
+- [x] 明确 channel 已关闭，仅做留档使用
 
 ### A11. `discuss-callback` 详细校验任务
 - [x] 校验当前 channel 必须是 discussion channel
@@ -212,9 +212,9 @@
 - [x] 测试绝对路径越界失败
 
 #### A13.5 回调链路测试
-- [. ] 测试 callback 成功后 moderator 在 origin channel 发出通知
-- [. ] 测试 origin channel 收到路径后能继续原工作流
-- [. ] 测试 discussion channel 后续只保留留档行为
+- [x] 测试 callback 成功后 moderator 在 origin channel 发出通知
+- [ ] 测试 origin channel 收到路径后能继续原工作流
+- [x] 测试 discussion channel 后续只保留留档行为
 
 #### A13.6 文档交付
 - [. ] 根据最终代码实现更新 `plans/CSM.md`