diff --git a/plans/TASKLIST.md b/plans/TASKLIST.md
index 4684529..dfe8bf2 100644
--- a/plans/TASKLIST.md
+++ b/plans/TASKLIST.md
@@ -119,12 +119,12 @@
 - [ ] 确保 callback 完成后的 closed channel 不会继续触发 handoff
 
 #### A7.4 `plugin/hooks/message-received.ts`
-- [ ] 梳理 moderator bot 消息当前是否已被过滤，避免 moderator 自己再次触发讨论链路
-- [ ] 对 closed discussion channel 的新消息增加统一处理入口
-- [ ] 若 closed discussion channel 收到新消息：
-  - [ ] 不再唤醒任何 Agent 正常讨论
-  - [ ] 由 moderator 回复“channel 已关闭，仅做留档使用”
-- [ ] 避免 moderator 的 closed 提示消息反复触发自身处理
+- [x] 梳理 moderator bot 消息当前是否已被过滤，避免 moderator 自己再次触发讨论链路
+- [x] 对 closed discussion channel 的新消息增加统一处理入口
+- [x] 若 closed discussion channel 收到新消息：
+  - [x] 不再唤醒任何 Agent 正常讨论
+  - [x] 由 moderator 回复“channel 已关闭，仅做留档使用”
+- [x] 避免 moderator 的 closed 提示消息反复触发自身处理
 
 #### A7.5 `plugin/core/session-state.ts`（如需）
 - [ ] 检查现有 session 相关缓存是否适合扩展 discussion 状态
@@ -167,23 +167,23 @@
 - [ ] 明确 channel 已关闭，仅做留档使用
 
 ### A11. `discuss-callback` 详细校验任务
-- [ ] 校验当前 channel 必须是 discussion channel
-- [ ] 校验当前 discussion 状态必须是 `active`
-- [ ] 校验调用者必须是 initiator
-- [ ] 校验 `summaryPath` 非空
-- [ ] 校验 `summaryPath` 文件存在
-- [ ] 校验 `summaryPath` 路径在 initiator workspace 内
-- [ ] 校验 callback 未重复执行
-- [ ] callback 成功后写入 `completedAt`
-- [ ] callback 成功后记录 `summaryPath`
-- [ ] callback 成功后切换 discussion 状态为 `completed` / `closed`
+- [x] 校验当前 channel 必须是 discussion channel
+- [x] 校验当前 discussion 状态必须是 `active`
+- [x] 校验调用者必须是 initiator
+- [x] 校验 `summaryPath` 非空
+- [x] 校验 `summaryPath` 文件存在
+- [x] 校验 `summaryPath` 路径在 initiator workspace 内
+- [x] 校验 callback 未重复执行
+- [x] callback 成功后写入 `completedAt`
+- [x] callback 成功后记录 `summaryPath`
+- [x] callback 成功后切换 discussion 状态为 `completed` / `closed`
 
 ### A12. 关闭后的行为封口
-- [ ] closed discussion channel 中所有旧 session 继续使用 no-reply 覆盖
-- [ ] closed discussion channel 中任何新消息都不再进入真实讨论
-- [ ] closed discussion channel 的任何新消息统一走 moderator 固定回复
-- [ ] 防止 closed channel 中 moderator 自己的回复再次触发回环
-- [ ] 明确 archived-only 的最终行为与边界
+- [x] closed discussion channel 中所有旧 session 继续使用 no-reply 覆盖
+- [x] closed discussion channel 中任何新消息都不再进入真实讨论
+- [x] closed discussion channel 的任何新消息统一走 moderator 固定回复
+- [x] 防止 closed channel 中 moderator 自己的回复再次触发回环
+- [x] 明确 archived-only 的最终行为与边界
 
 ### A13. 测试与文档收尾
 #### A13.1 工具层测试
diff --git a/plugin/core/discussion-service.ts b/plugin/core/discussion-service.ts
index aa65438..0ed8a0e 100644
--- a/plugin/core/discussion-service.ts
+++ b/plugin/core/discussion-service.ts
@@ -7,6 +7,7 @@ import { sendModeratorMessage } from "./moderator-discord.js";
 type DiscussionServiceDeps = {
   api: OpenClawPluginApi;
   moderatorBotToken?: string;
+  moderatorUserId?: string;
   workspaceRoot?: string;
   forceNoReplyForSession: (sessionKey: string) => void;
 };
@@ -171,6 +172,7 @@ export function createDiscussionService(deps: DiscussionServiceDeps) {
   async function maybeReplyClosedChannel(channelId: string, senderId?: string): Promise<boolean> {
     const metadata = getDiscussion(channelId);
     if (!metadata || metadata.status !== "closed") return false;
+    if (deps.moderatorUserId && senderId && senderId === deps.moderatorUserId) return true;
     if (!deps.moderatorBotToken) return true;
     await sendModeratorMessage(deps.moderatorBotToken, channelId, buildClosedMessage(), deps.api.logger);
     return true;
@@ -179,6 +181,9 @@ export function createDiscussionService(deps: DiscussionServiceDeps) {
   return {
     initDiscussion,
     getDiscussion,
+    isClosedDiscussion(channelId: string): boolean {
+      return isDiscussionClosed(channelId);
+    },
     maybeSendIdleReminder,
     maybeReplyClosedChannel,
     handleCallback,
diff --git a/plugin/hooks/before-model-resolve.ts b/plugin/hooks/before-model-resolve.ts
index 04fa65f..71d4dc6 100644
--- a/plugin/hooks/before-model-resolve.ts
+++ b/plugin/hooks/before-model-resolve.ts
@@ -29,6 +29,9 @@ type BeforeModelResolveDeps = {
   pruneDecisionMap: () => void;
   shouldDebugLog: (config: DirigentConfig & DebugConfig, channelId?: string) => boolean;
   ensureTurnOrder: (api: OpenClawPluginApi, channelId: string) => Promise<void> | void;
+  discussionService?: {
+    isClosedDiscussion: (channelId: string) => boolean;
+  };
 };
 
 export function registerBeforeModelResolveHook(deps: BeforeModelResolveDeps): void {
@@ -47,6 +50,7 @@ export function registerBeforeModelResolveHook(deps: BeforeModelResolveDeps): vo
     pruneDecisionMap,
     shouldDebugLog,
     ensureTurnOrder,
+    discussionService,
   } = deps;
 
   api.on("before_model_resolve", async (event, ctx) => {
@@ -86,6 +90,15 @@ export function registerBeforeModelResolveHook(deps: BeforeModelResolveDeps): vo
 
     if (derived.channelId) {
       sessionChannelId.set(key, derived.channelId);
+      if (discussionService?.isClosedDiscussion(derived.channelId)) {
+        sessionAllowed.set(key, false);
+        api.logger.info(`dirigent: before_model_resolve forcing no-reply for closed discussion channel=${derived.channelId} session=${key}`);
+        return {
+          model: ctx.model,
+          provider: ctx.provider,
+          noReply: true,
+        };
+      }
     }
     const resolvedAccountId = resolveAccountId(api, ctx.agentId || "");
     if (resolvedAccountId) {
diff --git a/plugin/index.ts b/plugin/index.ts
index 0f19715..83dcd95 100644
--- a/plugin/index.ts
+++ b/plugin/index.ts
@@ -118,6 +118,7 @@ export default {
     const discussionService = createDiscussionService({
       api,
       moderatorBotToken: baseConfig.moderatorBotToken,
+      moderatorUserId: getModeratorUserId(baseConfig),
       workspaceRoot: process.cwd(),
       forceNoReplyForSession: (sessionKey: string) => {
         if (sessionKey) forceNoReplySessions.add(sessionKey);
@@ -163,6 +164,7 @@ export default {
       pruneDecisionMap,
       shouldDebugLog,
       ensureTurnOrder,
+      discussionService,
     });
 
     registerBeforePromptBuildHook({