diff --git a/docs/progress/ai-robot-mca-progress.md b/docs/progress/ai-robot-mca-progress.md
index 959eadb..32d3ea1 100644
--- a/docs/progress/ai-robot-mca-progress.md
+++ b/docs/progress/ai-robot-mca-progress.md
@@ -172,6 +172,28 @@ public interface MessageRouterService {
   - 更新 spec/ai-robot/tasks.md
 - commits: b9792c8, 0b6fcf5
 
+### Session #2 (2026-02-24)
+- completed:
+  - TASK-020: 定义 MessageRouterService 接口
+  - TASK-021: 实现 MessageRouterServiceImpl
+  - TASK-022: 重构 MessageProcessService
+  - TASK-023: 更新 SessionManagerService 支持 channelType
+  - 创建 `src/main/java/com/wecom/robot/service/MessageRouterService.java`
+  - 创建 `src/main/java/com/wecom/robot/service/impl/MessageRouterServiceImpl.java`
+  - 更新 Session 实体添加 channelType 字段
+  - 更新 SessionManagerService 支持按渠道类型创建和筛选会话
+  - 实现 5 个核心方法：processInboundMessage, routeBySessionState, dispatchToAiService, dispatchToManualCs, dispatchToPendingPool
+  - 实现幂等性检查（基于 Redis SETNX）
+- changes:
+  - 新增 src/main/java/com/wecom/robot/service/MessageRouterService.java
+  - 新增 src/main/java/com/wecom/robot/service/impl/MessageRouterServiceImpl.java
+  - 更新 src/main/java/com/wecom/robot/service/MessageProcessService.java
+  - 更新 src/main/java/com/wecom/robot/entity/Session.java
+  - 更新 src/main/java/com/wecom/robot/service/SessionManagerService.java
+  - 更新 docs/progress/ai-robot-mca-progress.md
+  - 更新 spec/ai-robot/tasks.md
+- commits: b9792c8, 0b6fcf5, db378af, a8d7474
+
 ### Session #1 (2026-02-24)
 - completed:
   - 创建 spec/ai-robot/ 目录结构
diff --git a/spec/ai-robot/tasks.md b/spec/ai-robot/tasks.md
index ee7eac0..6b647e9 100644
--- a/spec/ai-robot/tasks.md
+++ b/spec/ai-robot/tasks.md
@@ -177,7 +177,7 @@ last_updated: "2026-02-24"
   - [x] 微信专属逻辑移至 WeChatAdapter
 
 ### TASK-023: 更新 SessionManagerService
-- **状态**: ⏳ 待开始
+- **状态**: ✅ 已完成
 - **优先级**: P0
 - **关联 AC**: AC-MCA-11, AC-MCA-12
 - **描述**: 支持渠道类型字段
@@ -185,8 +185,8 @@ last_updated: "2026-02-24"
   - `src/main/java/com/wecom/robot/service/SessionManagerService.java` 更新
   - `src/main/java/com/wecom/robot/entity/Session.java` 更新
 - **验收标准**:
-  - [ ] 创建会话时记录 channelType
-  - [ ] 支持按 channelType 筛选
+  - [x] 创建会话时记录 channelType
+  - [x] 支持按 channelType 筛选
 
 ---
 
@@ -341,7 +341,7 @@ Phase 5 (集成测试)               │
 | 指标 | 数值 |
 |-----|------|
 | 总任务数 | 20 |
-| 已完成 | 2 |
+| 已完成 | 4 |
 | 进行中 | 0 |
-| 待开始 | 18 |
-| 完成率 | 10% |
+| 待开始 | 16 |
+| 完成率 | 20% |