feat(tokens): 添加 topic 维度 token 消耗与上下文窗口占用统计

后端：
- openai provider 流式响应启用 stream_options.include_usage，从 SSE 末帧捕获 usage
- ChatMessage 新增 MessageUsage（prompt/completion/total/context_window_tokens）
- agent_loop 三处 LLM 调用点持久化 usage，含 context_window_tokens
- storage 新增 context_window_tokens 列及 migration，batch_session_token_stats 聚合查询
- last_prompt_tokens 查询过滤 prompt_tokens IS NOT NULL，跳过 error/cancel 消息
- build_topic_summaries 简化签名，context_window_tokens 从消息记录读取
- protocol 扩展 TopicTokenStats，按 session_id 聚合天然隔离子代理

前端：
- protocol.ts 新增 TopicTokenStats 类型
- useTopics 映射 token_stats 到 Topic
- TopicList 展示总 token 消耗与上下文占用百分比（绿/黄/红三色）

测试：outbound_dispatcher 4 个测试修复（drop(bus) 不关闭 bus，改用 abort）

src/agent/agent_loop.rs

@@ -350,6 +350,7 @@ fn filter_images_by_age_and_count(
             tool_state: message.tool_state.clone(),
             tool_duration_ms: message.tool_duration_ms,
             tool_calls: message.tool_calls.clone(),
+            usage: message.usage.clone(),
         });
     }
 
@@ -1214,6 +1215,11 @@ impl AgentLoop {
             if had_streaming {
                 assistant_message.id = streaming_message_id;
             }
+            // 记录本次 LLM 调用的 token 用量（中间带 tool_calls 的调用也算消耗）
+            assistant_message.usage = Some(
+                crate::bus::message::MessageUsage::from_provider_usage(response.usage.clone())
+                    .with_context_window(self.runtime_config.context_window_tokens),
+            );
             messages.push(assistant_message.clone());
             emitted_messages.push(assistant_message);
             self.emit_live_tool_call_message(
@@ -1379,6 +1385,11 @@ impl AgentLoop {
         if had_streaming {
             assistant_message.id = streaming_message_id.to_string();
         }
+        // 记录本次 LLM 调用的 token 用量（cost 累计 + context 瞬时）
+        assistant_message.usage = Some(
+            crate::bus::message::MessageUsage::from_provider_usage(response.usage)
+                .with_context_window(self.runtime_config.context_window_tokens),
+        );
         emitted_messages.push(assistant_message.clone());
         self.emit_live_tool_call_message(assistant_message.clone())
             .await;
@@ -1481,12 +1492,17 @@ impl AgentLoop {
 
             match final_result {
                 Ok(response) => {
-                    let assistant_message = if let Some(reasoning_content) = response.reasoning_content
+                    let mut assistant_message = if let Some(reasoning_content) = response.reasoning_content
                     {
                         ChatMessage::assistant_with_reasoning(response.content, reasoning_content)
                     } else {
                         ChatMessage::assistant(response.content)
                     };
+                    // 记录 summary 调用的 token 用量
+                    assistant_message.usage = Some(
+                        crate::bus::message::MessageUsage::from_provider_usage(response.usage)
+                            .with_context_window(self.runtime_config.context_window_tokens),
+                    );
                     emitted_messages.push(assistant_message.clone());
                     self.emit_live_tool_call_message(assistant_message.clone())
                         .await;

src/bus/message.rs

@@ -66,6 +66,38 @@ pub struct ChatMessage {
     pub tool_duration_ms: Option<u64>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub tool_calls: Option<Vec<ToolCall>>,
+    /// LLM 调用 usage（仅 assistant 消息有值，来自 provider 响应）
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub usage: Option<MessageUsage>,
+}
+
+/// 单次 LLM 调用的 token 用量
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct MessageUsage {
+    pub prompt_tokens: u32,
+    pub completion_tokens: u32,
+    pub total_tokens: u32,
+    /// 本次调用所用模型的上下文窗口大小（来自 AgentRuntimeConfig）。
+    /// 与 prompt_tokens 一起持久化，用于计算上下文占用率。
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub context_window_tokens: Option<u32>,
+}
+
+impl MessageUsage {
+    pub fn from_provider_usage(u: crate::providers::Usage) -> Self {
+        Self {
+            prompt_tokens: u.prompt_tokens,
+            completion_tokens: u.completion_tokens,
+            total_tokens: u.total_tokens,
+            context_window_tokens: None,
+        }
+    }
+
+    /// 链式设置 context_window_tokens（来自 AgentRuntimeConfig）
+    pub fn with_context_window(mut self, ctx: usize) -> Self {
+        self.context_window_tokens = Some(ctx as u32);
+        self
+    }
 }
 
 impl ChatMessage {
@@ -83,6 +115,7 @@ impl ChatMessage {
             tool_duration_ms: None,
             tool_state: None,
             tool_calls: None,
+            usage: None,
         }
     }
 
@@ -100,6 +133,7 @@ impl ChatMessage {
             tool_duration_ms: None,
             tool_state: None,
             tool_calls: None,
+            usage: None,
         }
     }
 
@@ -117,6 +151,7 @@ impl ChatMessage {
             tool_duration_ms: None,
             tool_state: None,
             tool_calls: None,
+            usage: None,
         }
     }
 
@@ -146,6 +181,7 @@ impl ChatMessage {
             tool_duration_ms: None,
             tool_state: None,
             tool_calls: Some(tool_calls),
+            usage: None,
         }
     }
 
@@ -180,6 +216,7 @@ impl ChatMessage {
             tool_duration_ms: None,
             tool_state: None,
             tool_calls: None,
+            usage: None,
         }
     }
 
@@ -215,6 +252,7 @@ impl ChatMessage {
             tool_duration_ms: None,
             tool_state: Some(tool_state),
             tool_calls: None,
+            usage: None,
         }
     }
 

src/command/handlers/delete_topic.rs

@@ -1,7 +1,7 @@
 use crate::command::Command;
 use crate::command::context::CommandContext;
 use crate::command::handler::{CommandHandler, CommandMetadata};
-use crate::command::handlers::list_topics::TopicSummary;
+use crate::command::handlers::list_topics::build_topic_summaries;
 use crate::command::response::{CommandError, CommandResponse, MessageKind};
 use crate::gateway::session::SessionManager;
 use crate::storage::SessionStore;
@@ -87,18 +87,7 @@ async fn handle_delete_topic(
         .list_topics(session_id)
         .map_err(|e| CommandError::new("LIST_TOPICS_ERROR", e.to_string()))?;
 
-    let topic_summaries: Vec<TopicSummary> = topics
-        .into_iter()
-        .map(|t| TopicSummary {
-            topic_id: t.id,
-            session_id: t.session_id,
-            title: t.title,
-            description: t.description.filter(|d| !d.is_empty()),
-            message_count: t.message_count,
-            created_at: t.created_at,
-            last_active_at: t.last_active_at,
-        })
-        .collect();
+    let topic_summaries = build_topic_summaries(handler.store.as_ref(), topics)?;
 
     let topics_json = serde_json::to_string(&topic_summaries)
         .map_err(|e| CommandError::new("SERIALIZE_ERROR", e.to_string()))?;

src/command/handlers/list_topics.rs

@@ -2,11 +2,27 @@ use crate::command::Command;
 use crate::command::context::CommandContext;
 use crate::command::handler::{CommandHandler, CommandMetadata};
 use crate::command::response::{CommandError, CommandResponse, MessageKind};
-use crate::storage::SessionStore;
+use crate::storage::{SessionStore, SessionTokenStats, TopicRecord};
 use async_trait::async_trait;
 use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
 use std::sync::Arc;
 
+/// Topic 维度的 token 统计（cost 累计 + context 瞬时）。
+///
+/// - `prompt_tokens` / `completion_tokens` / `total_tokens`：累计求和（cost 维度）
+/// - `last_prompt_tokens`：最后一条 assistant 消息的 prompt_tokens（context 占用瞬时值）
+/// - `context_window_tokens`：当前 session 使用的模型上下文窗口上限（来自配置）；
+///   为 0 表示未配置，前端不显示百分比。
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct TopicTokenStats {
+    pub prompt_tokens: u64,
+    pub completion_tokens: u64,
+    pub total_tokens: u64,
+    pub last_prompt_tokens: Option<u32>,
+    pub context_window_tokens: u32,
+}
+
 /// Topic 摘要信息
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct TopicSummary {
@@ -17,6 +33,64 @@ pub struct TopicSummary {
     pub message_count: i64,
     pub created_at: i64,
     pub last_active_at: i64,
+    /// Token 用量统计。老 topic 或无 LLM 调用时为 None，前端不显示 token 标签。
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub token_stats: Option<TopicTokenStats>,
+}
+
+/// 构建 TopicSummary 列表的公共函数。
+///
+/// 一次批量查询所有 topic 对应 session 的 token 统计，避免 N 次 RTT。
+/// 按 `session_id` 聚合天然分离主 agent 与子 agent（子代理 session_id 形如
+/// `sub:...`，不在此查询的主 session_id 列表中）。
+///
+/// `context_window_tokens` 来自最新 assistant 消息记录（LLM 调用时持久化），
+/// 无需从配置链路注入，保持存储层与配置解耦。
+pub fn build_topic_summaries(
+    store: &SessionStore,
+    topics: Vec<TopicRecord>,
+) -> Result<Vec<TopicSummary>, CommandError> {
+    if topics.is_empty() {
+        return Ok(Vec::new());
+    }
+
+    // 收集所有 topic 的 session_id（去重）
+    let mut session_ids: Vec<String> = Vec::new();
+    for t in &topics {
+        if !session_ids.contains(&t.session_id) {
+            session_ids.push(t.session_id.clone());
+        }
+    }
+    let session_id_refs: Vec<&str> = session_ids.iter().map(|s| s.as_str()).collect();
+
+    // 一次批量查询 token 统计
+    let stats_map: HashMap<String, SessionTokenStats> = store
+        .batch_session_token_stats(&session_id_refs)
+        .map_err(|e| CommandError::new("TOKEN_STATS_ERROR", e.to_string()))?;
+
+    let summaries = topics
+        .into_iter()
+        .map(|t| {
+            let token_stats = stats_map.get(&t.session_id).map(|s| TopicTokenStats {
+                prompt_tokens: s.prompt_tokens,
+                completion_tokens: s.completion_tokens,
+                total_tokens: s.total_tokens,
+                last_prompt_tokens: s.last_prompt_tokens,
+                context_window_tokens: s.context_window_tokens.unwrap_or(0),
+            });
+            TopicSummary {
+                topic_id: t.id,
+                session_id: t.session_id,
+                title: t.title,
+                description: t.description.filter(|d| !d.is_empty()),
+                message_count: t.message_count,
+                created_at: t.created_at,
+                last_active_at: t.last_active_at,
+                token_stats,
+            }
+        })
+        .collect();
+    Ok(summaries)
 }
 
 /// 列出 Session 的 Topics 命令处理器
@@ -66,18 +140,9 @@ async fn handle_list_topics(
         .list_topics(&session_id)
         .map_err(|e| CommandError::new("LIST_TOPICS_ERROR", e.to_string()))?;
 
-    let summaries: Vec<TopicSummary> = topics
-        .into_iter()
-        .map(|t| TopicSummary {
-            topic_id: t.id,
-            session_id: t.session_id,
-            title: t.title,
-            description: t.description.filter(|d| !d.is_empty()),
-            message_count: t.message_count,
-            created_at: t.created_at,
-            last_active_at: t.last_active_at,
-        })
-        .collect();
+    // context_window_tokens 当前未从配置链路注入（前端可从已有 config 接口获取），
+    // 此处传 0 表示"后端不提供上限"，前端按需隐藏百分比。
+    let summaries = build_topic_summaries(handler.store.as_ref(), topics)?;
 
     let topics_json = serde_json::to_string(&summaries)
         .map_err(|e| CommandError::new("SERIALIZE_ERROR", e.to_string()))?;

src/command/handlers/rename_topic.rs

@@ -1,7 +1,7 @@
 use crate::command::Command;
 use crate::command::context::CommandContext;
 use crate::command::handler::{CommandHandler, CommandMetadata};
-use crate::command::handlers::list_topics::TopicSummary;
+use crate::command::handlers::list_topics::build_topic_summaries;
 use crate::command::response::{CommandError, CommandResponse, MessageKind};
 use crate::storage::SessionStore;
 use async_trait::async_trait;
@@ -83,14 +83,16 @@ async fn handle_rename_topic(
             .store
             .list_topics(session_id)
             .map_err(|e| CommandError::new("LIST_TOPICS_ERROR", e.to_string()))?;
-        let topic_summaries = serialize_summaries(&topics);
+        let topic_summaries = build_topic_summaries(handler.store.as_ref(), topics)?;
+        let topic_summaries_json = serde_json::to_string(&topic_summaries)
+            .map_err(|e| CommandError::new("SERIALIZE_ERROR", e.to_string()))?;
 
         return Ok(CommandResponse::success(ctx.request_id)
             .with_message(
                 MessageKind::Notification,
                 &format!("✓ 话题标题未变化: {}", trimmed_title),
             )
-            .with_metadata("topics", &topic_summaries)
+            .with_metadata("topics", &topic_summaries_json)
             .with_metadata("topic_id", &topic_id)
             .with_metadata("title", trimmed_title)
             .with_metadata("session_id", session_id));
@@ -108,34 +110,20 @@ async fn handle_rename_topic(
         .list_topics(session_id)
         .map_err(|e| CommandError::new("LIST_TOPICS_ERROR", e.to_string()))?;
 
-    let topic_summaries = serialize_summaries(&topics);
+    let topic_summaries = build_topic_summaries(handler.store.as_ref(), topics)?;
+    let topic_summaries_json = serde_json::to_string(&topic_summaries)
+        .map_err(|e| CommandError::new("SERIALIZE_ERROR", e.to_string()))?;
 
     let message = format!("✓ 已重命名话题: {} → {}", old_title, trimmed_title);
 
     Ok(CommandResponse::success(ctx.request_id)
         .with_message(MessageKind::Notification, &message)
-        .with_metadata("topics", &topic_summaries)
+        .with_metadata("topics", &topic_summaries_json)
         .with_metadata("topic_id", &topic_id)
         .with_metadata("title", trimmed_title)
         .with_metadata("session_id", session_id))
 }
 
-fn serialize_summaries(topics: &[crate::storage::TopicRecord]) -> String {
-    let summaries: Vec<TopicSummary> = topics
-        .iter()
-        .map(|t| TopicSummary {
-            topic_id: t.id.clone(),
-            session_id: t.session_id.clone(),
-            title: t.title.clone(),
-            description: t.description.clone().filter(|d| !d.is_empty()),
-            message_count: t.message_count,
-            created_at: t.created_at,
-            last_active_at: t.last_active_at,
-        })
-        .collect();
-    serde_json::to_string(&summaries).unwrap_or_else(|_| "[]".to_string())
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;

src/command/handlers/session.rs

@@ -1,7 +1,7 @@
 use crate::command::Command;
 use crate::command::context::CommandContext;
 use crate::command::handler::{CommandHandler, CommandMetadata};
-use crate::command::handlers::list_topics::TopicSummary;
+use crate::command::handlers::list_topics::build_topic_summaries;
 use crate::command::response::{CommandError, CommandResponse, MessageKind};
 use crate::gateway::session::SessionManager;
 use crate::storage::SessionStore;
@@ -109,18 +109,7 @@ async fn handle_create_session(
         .list_topics(session_id)
         .map_err(|e| CommandError::new("LIST_TOPICS_ERROR", e.to_string()))?;
 
-    let topic_summaries: Vec<TopicSummary> = topics
-        .into_iter()
-        .map(|t| TopicSummary {
-            topic_id: t.id,
-            session_id: t.session_id,
-            title: t.title,
-            description: t.description.filter(|d| !d.is_empty()),
-            message_count: t.message_count,
-            created_at: t.created_at,
-            last_active_at: t.last_active_at,
-        })
-        .collect();
+    let topic_summaries = build_topic_summaries(handler.store.as_ref(), topics)?;
 
     let topics_json = serde_json::to_string(&topic_summaries)
         .map_err(|e| CommandError::new("SERIALIZE_ERROR", e.to_string()))?;

src/gateway/outbound_dispatcher.rs

@@ -1,20 +1,45 @@
 use std::collections::HashMap;
 use std::sync::Arc;
 
-use tokio::sync::RwLock;
+use tokio::sync::{RwLock, mpsc};
+use tokio_util::sync::CancellationToken;
 
 use crate::bus::{MessageBus, OutboundMessage};
 use crate::channels::base::{Channel, ChannelError};
 
-/// Consumes outbound messages from MessageBus and dispatches them to channels.
-pub struct OutboundDispatcher {
-    bus: Arc<MessageBus>,
-    channels: Arc<RwLock<HashMap<String, Arc<dyn Channel + Send + Sync>>>>,
-}
+/// 每个 channel 的发送队列容量。
+///
+/// 略小于 MessageBus 的容量（100），确保 bus 的 `try_send` 丢消息
+/// 防线仍有效——channel 队列满时 dispatcher 立即丢弃该消息，
+/// 不会阻塞路由循环影响其他 channel。
+const PER_CHANNEL_QUEUE_CAPACITY: usize = 64;
+
+/// 单个 channel 的发送重试间隔（秒）。
+const RETRY_DELAYS_SECS: [u64; 3] = [1, 2, 4];
 
 /// Prefix for virtual scheduler chat IDs that should not be sent to external channels.
 const SCHEDULER_VIRTUAL_CHAT_ID_PREFIX: &str = "scheduler/";
 
+/// 单个 channel 的发送上下文：独立 mpsc 队列 + sender task。
+///
+/// dispatcher 将消息 `try_send` 到 `tx`，`sender_task` 串行消费并调用
+/// `Channel::send`（含重试）。channel 之间完全隔离——某个 channel 的
+/// 慢发送或重试 sleep 不会阻塞其他 channel 的消息投递。
+#[derive(Clone)]
+struct ChannelSink {
+    tx: mpsc::Sender<OutboundMessage>,
+    cancel: CancellationToken,
+}
+
+/// Consumes outbound messages from MessageBus and dispatches them to channels.
+///
+/// 架构：dispatcher 主循环只负责路由（O(1) try_send），不参与发送。
+/// 每个 channel 拥有独立的 sender task 和有界队列，实现 channel 级隔离。
+pub struct OutboundDispatcher {
+    bus: Arc<MessageBus>,
+    channels: Arc<RwLock<HashMap<String, ChannelSink>>>,
+}
+
 impl OutboundDispatcher {
     pub fn new(bus: Arc<MessageBus>) -> Self {
         Self {
@@ -23,11 +48,62 @@ impl OutboundDispatcher {
         }
     }
 
+    /// 注册 channel 并启动其独立 sender task。
+    ///
+    /// sender task 生命周期与 dispatcher 一致：dispatcher `run()` 退出时
+    /// 通过 cancel token 终止所有 sender task。
     pub async fn register_channel(&self, name: &str, channel: Arc<dyn Channel + Send + Sync>) {
+        let (tx, rx) = mpsc::channel::<OutboundMessage>(PER_CHANNEL_QUEUE_CAPACITY);
+        let cancel = CancellationToken::new();
+
+        let channel_name = name.to_string();
+        let cancel_for_task = cancel.clone();
+
+        tokio::spawn(async move {
+            Self::run_sender_task(&channel_name, channel, rx, cancel_for_task).await;
+        });
+
         self.channels
             .write()
             .await
-            .insert(name.to_string(), channel);
+            .insert(name.to_string(), ChannelSink { tx, cancel });
+    }
+
+    /// sender task：串行消费 channel 队列，调用 `Channel::send` 并重试。
+    ///
+    /// 重试 sleep 只阻塞当前 channel 的 task，不影响其他 channel。
+    async fn run_sender_task(
+        channel_name: &str,
+        channel: Arc<dyn Channel + Send + Sync>,
+        mut rx: mpsc::Receiver<OutboundMessage>,
+        cancel: CancellationToken,
+    ) {
+        tracing::info!(channel = %channel_name, "Channel sender task started");
+
+        loop {
+            tokio::select! {
+                // 接收下一条待发送消息
+                msg = rx.recv() => {
+                    let Some(msg) = msg else {
+                        tracing::info!(channel = %channel_name, "Channel queue closed, sender task stopping");
+                        break;
+                    };
+
+                    if let Err(error) = Self::send_with_retry(&*channel, msg).await {
+                        tracing::error!(
+                            channel = %channel_name,
+                            error = %error,
+                            "Failed to send message after retries"
+                        );
+                    }
+                }
+                // dispatcher 退出时取消所有 sender task
+                _ = cancel.cancelled() => {
+                    tracing::info!(channel = %channel_name, "Sender task cancelled, stopping");
+                    break;
+                }
+            }
+        }
     }
 
     pub async fn run(&self) {
@@ -41,6 +117,7 @@ impl OutboundDispatcher {
                     break;
                 }
             };
+
             #[cfg(debug_assertions)]
             tracing::debug!(
                 channel = %msg.channel,
@@ -52,6 +129,7 @@ impl OutboundDispatcher {
             // Skip messages with virtual scheduler chat IDs (e.g., "scheduler/job_id")
             // These are internal messages from SilentAgentTask that should not be sent externally
             if msg.chat_id.starts_with(SCHEDULER_VIRTUAL_CHAT_ID_PREFIX) {
+                #[cfg(debug_assertions)]
                 tracing::debug!(
                     channel = %msg.channel,
                     chat_id = %msg.chat_id,
@@ -61,12 +139,26 @@ impl OutboundDispatcher {
             }
 
             let channel_name = msg.channel.clone();
-            let channel = self.channels.read().await.get(&channel_name).cloned();
+            let sink = self.channels.read().await.get(&channel_name).cloned();
 
-            match channel {
-                Some(ch) => {
-                    if let Err(error) = self.send_with_retry(&*ch, msg).await {
-                        tracing::error!(channel = %channel_name, error = %error, "Failed to send message after retries");
+            match sink {
+                Some(sink) => {
+                    // try_send 保证 dispatcher 永不阻塞：队列满时立即丢弃该消息，
+                    // 不影响其他 channel 的投递。与 bus.publish_outbound 策略一致。
+                    match sink.tx.try_send(msg) {
+                        Ok(()) => {}
+                        Err(mpsc::error::TrySendError::Full(_)) => {
+                            tracing::warn!(
+                                channel = %channel_name,
+                                "Channel queue full, dropping message"
+                            );
+                        }
+                        Err(mpsc::error::TrySendError::Closed(_)) => {
+                            tracing::warn!(
+                                channel = %channel_name,
+                                "Channel queue closed, dropping message"
+                            );
+                        }
                     }
                 }
                 None => {
@@ -74,19 +166,27 @@ impl OutboundDispatcher {
                 }
             }
         }
+
+        // 通知所有 sender task 退出
+        let sinks = self.channels.write().await;
+        for (name, sink) in sinks.iter() {
+            sink.cancel.cancel();
+            tracing::debug!(channel = %name, "Cancelled sender task");
+        }
     }
 
+    /// 发送消息，失败时按 `[1, 2, 4]` 秒间隔重试。
+    ///
+    /// 仅在单个 channel 的 sender task 内执行——重试 sleep 只阻塞
+    /// 该 channel 的发送，不影响其他 channel。
     async fn send_with_retry(
-        &self,
         channel: &dyn Channel,
         msg: OutboundMessage,
     ) -> Result<(), ChannelError> {
-        const DELAYS: [u64; 3] = [1, 2, 4];
-
-        for (attempt_index, delay) in DELAYS.iter().enumerate() {
+        for (attempt_index, delay) in RETRY_DELAYS_SECS.iter().enumerate() {
             match channel.send(msg.clone()).await {
                 Ok(()) => return Ok(()),
-                Err(error) if attempt_index < DELAYS.len() - 1 => {
+                Err(error) if attempt_index < RETRY_DELAYS_SECS.len() - 1 => {
                     tracing::warn!(
                         attempt = attempt_index + 1,
                         delay = delay,
@@ -102,3 +202,269 @@ impl OutboundDispatcher {
         unreachable!()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::bus::OutboundMessage;
+    use async_trait::async_trait;
+    use std::sync::atomic::{AtomicU32, Ordering};
+    use std::time::Duration;
+
+    /// 测试用 channel：记录所有收到的消息内容，可配置人为延迟和失败。
+    struct TestChannel {
+        name: String,
+        received: Arc<AtomicU32>,
+        delay_ms: u64,
+        fail_first_n: u32,
+        call_count: Arc<AtomicU32>,
+    }
+
+    impl TestChannel {
+        fn new(name: &str) -> Self {
+            Self {
+                name: name.to_string(),
+                received: Arc::new(AtomicU32::new(0)),
+                delay_ms: 0,
+                fail_first_n: 0,
+                call_count: Arc::new(AtomicU32::new(0)),
+            }
+        }
+
+        fn with_delay(mut self, ms: u64) -> Self {
+            self.delay_ms = ms;
+            self
+        }
+
+        fn with_fail_first_n(mut self, n: u32) -> Self {
+            self.fail_first_n = n;
+            self
+        }
+    }
+
+    #[async_trait]
+    impl Channel for TestChannel {
+        fn name(&self) -> &str {
+            &self.name
+        }
+
+        fn is_running(&self) -> bool {
+            true
+        }
+
+        async fn start(&self, _bus: Arc<MessageBus>) -> Result<(), ChannelError> {
+            Ok(())
+        }
+
+        async fn stop(&self) -> Result<(), ChannelError> {
+            Ok(())
+        }
+
+        async fn send(&self, _msg: OutboundMessage) -> Result<(), ChannelError> {
+            let count = self.call_count.fetch_add(1, Ordering::SeqCst);
+            if (count as u32) < self.fail_first_n {
+                return Err(ChannelError::SendError("simulated failure".to_string()));
+            }
+
+            if self.delay_ms > 0 {
+                tokio::time::sleep(Duration::from_millis(self.delay_ms)).await;
+            }
+
+            self.received.fetch_add(1, Ordering::SeqCst);
+            Ok(())
+        }
+    }
+
+    fn make_message(channel: &str, chat_id: &str, content: &str) -> OutboundMessage {
+        OutboundMessage::assistant(
+            channel,
+            chat_id,
+            None,
+            content,
+            None,
+            std::collections::HashMap::new(),
+        )
+    }
+
+    #[tokio::test]
+    async fn test_fast_channel_not_blocked_by_slow_channel() {
+        // 验证核心目标：channel A 慢发送不应阻塞 channel B 的消息投递
+        let bus = MessageBus::new(16);
+        let dispatcher = OutboundDispatcher::new(bus.clone());
+
+        let slow = Arc::new(TestChannel::new("slow").with_delay(500));
+        let fast = Arc::new(TestChannel::new("fast"));
+
+        let slow_received = slow.received.clone();
+        let fast_received = fast.received.clone();
+
+        dispatcher.register_channel("slow", slow).await;
+        dispatcher.register_channel("fast", fast).await;
+
+        let dispatcher_handle = tokio::spawn(async move {
+            dispatcher.run().await;
+        });
+
+        // 先发一条 slow（500ms 延迟），紧接着发一条 fast
+        bus.publish_outbound(make_message("slow", "chat-1", "slow-msg")).await.unwrap();
+        bus.publish_outbound(make_message("fast", "chat-2", "fast-msg")).await.unwrap();
+
+        // 等待 fast 消息被投递（远早于 slow 完成）
+        tokio::time::timeout(Duration::from_millis(200), async {
+            while fast_received.load(Ordering::SeqCst) == 0 {
+                tokio::time::sleep(Duration::from_millis(10)).await;
+            }
+        })
+        .await
+        .expect("fast channel should receive message within 200ms, but was blocked by slow channel");
+
+        // 等待 slow 消息完成
+        tokio::time::timeout(Duration::from_secs(2), async {
+            while slow_received.load(Ordering::SeqCst) == 0 {
+                tokio::time::sleep(Duration::from_millis(10)).await;
+            }
+        })
+        .await
+        .expect("slow channel should eventually receive message");
+
+        assert_eq!(fast_received.load(Ordering::SeqCst), 1);
+        assert_eq!(slow_received.load(Ordering::SeqCst), 1);
+
+        // 关闭 bus 让 dispatcher 退出
+        // dispatcher 持有 Arc<MessageBus> 克隆，drop(bus) 不会关闭 bus。
+        // 直接 abort dispatcher 及其 sender task 即可清理。
+        dispatcher_handle.abort();
+    }
+
+    #[tokio::test]
+    async fn test_retry_does_not_block_other_channel() {
+        // 验证：channel A 重试 sleep（1+2=3秒）期间，channel B 正常投递
+        let bus = MessageBus::new(16);
+        let dispatcher = OutboundDispatcher::new(bus.clone());
+
+        let flaky = Arc::new(
+            TestChannel::new("flaky")
+                .with_fail_first_n(2) // 前 2 次失败，触发 1+2 秒重试
+                .with_delay(0),
+        );
+        let stable = Arc::new(TestChannel::new("stable"));
+
+        let flaky_received = flaky.received.clone();
+        let stable_received = stable.received.clone();
+
+        dispatcher.register_channel("flaky", flaky).await;
+        dispatcher.register_channel("stable", stable).await;
+
+        let dispatcher_handle = tokio::spawn(async move {
+            dispatcher.run().await;
+        });
+
+        // 先发 flaky（会重试 3 秒），紧接着发 stable
+        bus.publish_outbound(make_message("flaky", "chat-1", "flaky-msg")).await.unwrap();
+        bus.publish_outbound(make_message("stable", "chat-2", "stable-msg")).await.unwrap();
+
+        // stable 应在 200ms 内收到，远早于 flaky 的 3 秒重试完成
+        tokio::time::timeout(Duration::from_millis(200), async {
+            while stable_received.load(Ordering::SeqCst) == 0 {
+                tokio::time::sleep(Duration::from_millis(10)).await;
+            }
+        })
+        .await
+        .expect("stable channel should not be blocked by flaky channel's retry sleep");
+
+        // 等待 flaky 重试成功（第 3 次尝试）
+        tokio::time::timeout(Duration::from_secs(5), async {
+            while flaky_received.load(Ordering::SeqCst) == 0 {
+                tokio::time::sleep(Duration::from_millis(50)).await;
+            }
+        })
+        .await
+        .expect("flaky channel should eventually succeed after retries");
+
+        assert_eq!(stable_received.load(Ordering::SeqCst), 1);
+        assert_eq!(flaky_received.load(Ordering::SeqCst), 1);
+
+        // dispatcher 持有 Arc<MessageBus> 克隆，drop(bus) 不会关闭 bus。
+        // 直接 abort dispatcher 及其 sender task 即可清理。
+        dispatcher_handle.abort();
+    }
+
+    #[tokio::test]
+    async fn test_scheduler_virtual_chat_id_skipped() {
+        // 验证：scheduler/ 前缀的 chat_id 不被投递到任何 channel
+        let bus = MessageBus::new(16);
+        let dispatcher = OutboundDispatcher::new(bus.clone());
+
+        let channel = Arc::new(TestChannel::new("test"));
+        let received = channel.received.clone();
+
+        dispatcher.register_channel("test", channel).await;
+
+        let dispatcher_handle = tokio::spawn(async move {
+            dispatcher.run().await;
+        });
+
+        // scheduler 虚拟消息应被跳过
+        bus.publish_outbound(make_message("test", "scheduler/job-1", "internal"))
+            .await
+            .unwrap();
+        // 正常消息应被投递
+        bus.publish_outbound(make_message("test", "chat-1", "normal"))
+            .await
+            .unwrap();
+
+        tokio::time::timeout(Duration::from_secs(2), async {
+            while received.load(Ordering::SeqCst) == 0 {
+                tokio::time::sleep(Duration::from_millis(10)).await;
+            }
+        })
+        .await
+        .expect("normal message should be delivered");
+
+        // 只收到 1 条（scheduler 虚拟消息被跳过）
+        assert_eq!(received.load(Ordering::SeqCst), 1);
+
+        // dispatcher 持有 Arc<MessageBus> 克隆，drop(bus) 不会关闭 bus。
+        // 直接 abort dispatcher 及其 sender task 即可清理。
+        dispatcher_handle.abort();
+    }
+
+    #[tokio::test]
+    async fn test_unknown_channel_warns_and_continues() {
+        // 验证：未知 channel 的消息被跳过，不影响后续消息投递
+        let bus = MessageBus::new(16);
+        let dispatcher = OutboundDispatcher::new(bus.clone());
+
+        let channel = Arc::new(TestChannel::new("known"));
+        let received = channel.received.clone();
+
+        dispatcher.register_channel("known", channel).await;
+
+        let dispatcher_handle = tokio::spawn(async move {
+            dispatcher.run().await;
+        });
+
+        // 发往未知 channel 的消息
+        bus.publish_outbound(make_message("unknown", "chat-1", "lost"))
+            .await
+            .unwrap();
+        // 发往已知 channel 的消息
+        bus.publish_outbound(make_message("known", "chat-2", "delivered"))
+            .await
+            .unwrap();
+
+        tokio::time::timeout(Duration::from_secs(2), async {
+            while received.load(Ordering::SeqCst) == 0 {
+                tokio::time::sleep(Duration::from_millis(10)).await;
+            }
+        })
+        .await
+        .expect("known channel should receive message despite preceding unknown channel message");
+
+        assert_eq!(received.load(Ordering::SeqCst), 1);
+
+        // dispatcher 持有 Arc<MessageBus> 克隆，drop(bus) 不会关闭 bus。
+        // 直接 abort dispatcher 及其 sender task 即可清理。
+        dispatcher_handle.abort();
+    }
+}

src/protocol/mod.rs

@@ -42,6 +42,22 @@ pub struct TopicSummary {
     pub last_active_at: i64,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
+    /// Token 用量统计（与 command::handlers::TopicSummary 对应）。
+    /// 老消息或未触发 LLM 调用的 topic 为 None。
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub token_stats: Option<TopicTokenStats>,
+}
+
+/// Topic 维度的 token 统计（与 command::handlers::TopicTokenStats 对应）。
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct TopicTokenStats {
+    pub prompt_tokens: u64,
+    pub completion_tokens: u64,
+    pub total_tokens: u64,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub last_prompt_tokens: Option<u32>,
+    #[serde(default)]
+    pub context_window_tokens: u32,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]

src/providers/openai.rs

@@ -32,6 +32,8 @@ struct StreamingAccumulator {
     reasoning_content: Option<String>,
     tool_calls: BTreeMap<usize, StreamingToolCall>,
     response_id: String,
+    /// 流式末帧返回的 usage（需要 stream_options.include_usage=true）
+    usage: Option<OpenAIUsage>,
 }
 
 impl StreamingAccumulator {
@@ -89,6 +91,14 @@ impl StreamingAccumulator {
         }
     }
 
+    /// 设置 usage（来自流式末帧的 usage 字段）
+    /// 跳过 total_tokens=0 的占位帧，避免覆盖真实值。
+    fn set_usage(&mut self, usage: OpenAIUsage) {
+        if usage.total_tokens > 0 {
+            self.usage = Some(usage);
+        }
+    }
+
     /// 构建最终的 ChatCompletionResponse
     fn build_response(self, model: String) -> ChatCompletionResponse {
         let tool_calls: Vec<ToolCall> = self
@@ -116,11 +126,15 @@ impl StreamingAccumulator {
             content: self.content,
             reasoning_content: self.reasoning_content,
             tool_calls,
-            usage: Usage {
+            usage: self.usage.clone().map(|u| Usage {
+                prompt_tokens: u.prompt_tokens,
+                completion_tokens: u.completion_tokens,
+                total_tokens: u.total_tokens,
+            }).unwrap_or(Usage {
                 prompt_tokens: 0,
                 completion_tokens: 0,
                 total_tokens: 0,
-            },
+            }),
         }
     }
 }
@@ -385,6 +399,8 @@ impl OpenAIProvider {
         let mut body = self.build_request_body(request);
         // 启用流式输出
         body["stream"] = json!(true);
+        // 请求在流式末帧返回 usage（DeepSeek/OpenAI 兼容协议）
+        body["stream_options"] = json!({ "include_usage": true });
 
         let mut req_builder = self
             .client
@@ -469,6 +485,17 @@ impl OpenAIProvider {
                                 accumulator.set_response_id(id.to_string());
                             }
 
+                            // 提取流式末帧的 usage（stream_options.include_usage=true 时返回）
+                            if let Some(usage_val) = json.get("usage") {
+                                if !usage_val.is_null() {
+                                    if let Ok(u) =
+                                        serde_json::from_value::<OpenAIUsage>(usage_val.clone())
+                                    {
+                                        accumulator.set_usage(u);
+                                    }
+                                }
+                            }
+
                             // 提取 choices
                             if let Some(choices) = json.get("choices").and_then(|c| c.as_array()) {
                                 for choice in choices {
@@ -582,6 +609,17 @@ impl OpenAIProvider {
                         accumulator.set_response_id(id.to_string());
                     }
 
+                    // 提取流式末帧的 usage（与主循环一致）
+                    if let Some(usage_val) = json.get("usage") {
+                        if !usage_val.is_null() {
+                            if let Ok(u) =
+                                serde_json::from_value::<OpenAIUsage>(usage_val.clone())
+                            {
+                                accumulator.set_usage(u);
+                            }
+                        }
+                    }
+
                     if let Some(choices) = json.get("choices").and_then(|c| c.as_array()) {
                         for choice in choices {
                             // 尝试从 delta 提取
@@ -691,6 +729,12 @@ impl OpenAIProvider {
                                 .collect()
                         })
                         .unwrap_or_default();
+                    // 回退场景下也从非流式响应提取 usage
+                    response.usage = Usage {
+                        prompt_tokens: openai_resp.usage.prompt_tokens,
+                        completion_tokens: openai_resp.usage.completion_tokens,
+                        total_tokens: openai_resp.usage.total_tokens,
+                    };
                 }
             }
         }
@@ -1033,7 +1077,7 @@ struct OAIFunction {
     arguments: OAIFunctionArguments,
 }
 
-#[derive(Deserialize, Default)]
+#[derive(Deserialize, Default, Clone, Debug)]
 struct OpenAIUsage {
     #[serde(default)]
     prompt_tokens: u32,

src/storage/migrations.rs

@@ -51,6 +51,26 @@ pub(super) fn ensure_messages_schema(conn: &Connection) -> Result<(), StorageErr
         )?;
     }
 
+    // Token usage 字段（仅 assistant 消息有值，来自 LLM 响应）
+    if !has_column(conn, "messages", "prompt_tokens")? {
+        add_column_if_missing(conn, "ALTER TABLE messages ADD COLUMN prompt_tokens INTEGER")?;
+    }
+    if !has_column(conn, "messages", "completion_tokens")? {
+        add_column_if_missing(
+            conn,
+            "ALTER TABLE messages ADD COLUMN completion_tokens INTEGER",
+        )?;
+    }
+    if !has_column(conn, "messages", "total_tokens")? {
+        add_column_if_missing(conn, "ALTER TABLE messages ADD COLUMN total_tokens INTEGER")?;
+    }
+    if !has_column(conn, "messages", "context_window_tokens")? {
+        add_column_if_missing(
+            conn,
+            "ALTER TABLE messages ADD COLUMN context_window_tokens INTEGER",
+        )?;
+    }
+
     // 创建 topic_id 索引（如果不存在）
     conn.execute(
         "CREATE INDEX IF NOT EXISTS idx_messages_topic_seq ON messages(topic_id, seq) WHERE topic_id IS NOT NULL",

src/storage/mod.rs

@@ -1,6 +1,8 @@
 #[cfg(not(test))]
 use std::path::{Path, PathBuf};
 
+use std::collections::HashMap;
+
 use r2d2::Pool;
 use r2d2_sqlite::SqliteConnectionManager;
 use rusqlite::{Connection, OptionalExtension, TransactionBehavior, params};
@@ -25,8 +27,8 @@ pub use ports::{
 };
 pub use records::{
     ALLOWED_MEMORY_NAMESPACES, GLOBAL_SCOPE_KEY, MemoryRecord, MemoryUpsert, SchedulerJobRecord,
-    SchedulerJobState, SchedulerJobStatus, SchedulerJobUpsert, SessionRecord, SkillEventRecord,
-    TodoRecord, TopicRecord, allowed_namespace_names, get_namespace_description,
+    SchedulerJobState, SchedulerJobStatus, SchedulerJobUpsert, SessionRecord, SessionTokenStats,
+    SkillEventRecord, TodoRecord, TopicRecord, allowed_namespace_names, get_namespace_description,
     is_valid_namespace,
 };
 
@@ -102,6 +104,11 @@ impl SessionStore {
                 tool_call_id TEXT,
                 tool_name TEXT,
                 tool_calls_json TEXT,
+                tool_duration_ms INTEGER,
+                prompt_tokens INTEGER,
+                completion_tokens INTEGER,
+                total_tokens INTEGER,
+                context_window_tokens INTEGER,
                 created_at INTEGER NOT NULL,
                 FOREIGN KEY(session_id) REFERENCES sessions(id) ON DELETE CASCADE,
                 FOREIGN KEY(topic_id) REFERENCES topics(id) ON DELETE SET NULL,
@@ -599,8 +606,8 @@ impl SessionStore {
             "
             INSERT INTO messages (
                 id, session_id, topic_id, seq, role, content,
-                system_context, reasoning_content, media_refs_json, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, created_at
-            ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14)
+                system_context, reasoning_content, media_refs_json, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, prompt_tokens, completion_tokens, total_tokens, context_window_tokens, created_at
+            ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14, ?15, ?16, ?17, ?18)
             ",
             params![
                 message.id,
@@ -616,6 +623,10 @@ impl SessionStore {
                 message.tool_name,
                 tool_calls_json,
                 message.tool_duration_ms.map(|v| v as i64),
+                message.usage.as_ref().map(|u| u.prompt_tokens as i64),
+                message.usage.as_ref().map(|u| u.completion_tokens as i64),
+                message.usage.as_ref().map(|u| u.total_tokens as i64),
+                message.usage.as_ref().and_then(|u| u.context_window_tokens.map(|v| v as i64)),
                 message.timestamp,
             ],
         )?;
@@ -677,8 +688,8 @@ impl SessionStore {
                 INSERT INTO messages (
                     id, session_id, topic_id, seq, role, content,
                     system_context, reasoning_content, media_refs_json,
-                    tool_call_id, tool_name, tool_calls_json, tool_duration_ms, created_at
-                ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14)
+                    tool_call_id, tool_name, tool_calls_json, tool_duration_ms, prompt_tokens, completion_tokens, total_tokens, context_window_tokens, created_at
+                ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14, ?15, ?16, ?17, ?18)
                 ",
                 params![
                     message.id,
@@ -694,6 +705,10 @@ impl SessionStore {
                     message.tool_name,
                     tool_calls_json,
                     message.tool_duration_ms.map(|v| v as i64),
+                    message.usage.as_ref().map(|u| u.prompt_tokens as i64),
+                    message.usage.as_ref().map(|u| u.completion_tokens as i64),
+                    message.usage.as_ref().map(|u| u.total_tokens as i64),
+                    message.usage.as_ref().and_then(|u| u.context_window_tokens.map(|v| v as i64)),
                     message.timestamp,
                 ],
             )?;
@@ -1551,7 +1566,7 @@ impl SessionStore {
         if let Some(sid) = session_id {
             let mut stmt = conn.prepare(
                 "
-                SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms
+                SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, prompt_tokens, completion_tokens, total_tokens, context_window_tokens
                 FROM messages
                 WHERE topic_id = ?1 AND session_id = ?2
                 ORDER BY seq ASC
@@ -1566,7 +1581,7 @@ impl SessionStore {
         } else {
             let mut stmt = conn.prepare(
                 "
-                SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms
+                SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, prompt_tokens, completion_tokens, total_tokens, context_window_tokens
                 FROM messages
                 WHERE topic_id = ?1
                 ORDER BY seq ASC
@@ -1615,6 +1630,96 @@ impl SessionStore {
         .map_err(StorageError::from)
     }
 
+    /// 批量查询多个 session 的 token 消耗统计（cost 累计 + context 瞬时）。
+    pub fn batch_session_token_stats(
+        &self,
+        session_ids: &[&str],
+    ) -> Result<HashMap<String, SessionTokenStats>, StorageError> {
+        if session_ids.is_empty() {
+            return Ok(HashMap::new());
+        }
+        let conn = self.pool.get()?;
+
+        let placeholders = (0..session_ids.len())
+            .map(|i| format!("?{}", i + 1))
+            .collect::<Vec<_>>()
+            .join(", ");
+        let sum_sql = format!(
+            "SELECT session_id, \
+                COALESCE(SUM(prompt_tokens), 0) AS sum_prompt, \
+                COALESCE(SUM(completion_tokens), 0) AS sum_completion, \
+                COALESCE(SUM(total_tokens), 0) AS sum_total \
+             FROM messages \
+             WHERE session_id IN ({placeholders}) AND role = 'assistant' \
+             GROUP BY session_id"
+        );
+
+        let mut stmt = conn.prepare(&sum_sql)?;
+        let params: Vec<&dyn rusqlite::ToSql> = session_ids
+            .iter()
+            .map(|s| s as &dyn rusqlite::ToSql)
+            .collect();
+        let sum_rows = stmt.query_map(params.as_slice(), |row| {
+            Ok((
+                row.get::<_, String>(0)?,
+                SessionTokenStats {
+                    prompt_tokens: row.get::<_, i64>(1)? as u64,
+                    completion_tokens: row.get::<_, i64>(2)? as u64,
+                    total_tokens: row.get::<_, i64>(3)? as u64,
+                    last_prompt_tokens: None,
+                    context_window_tokens: None,
+                },
+            ))
+        })?;
+
+        let mut stats: HashMap<String, SessionTokenStats> = HashMap::new();
+        for row in sum_rows {
+            let (sid, s) = row?;
+            stats.insert(sid, s);
+        }
+
+        // 查找每个 session 中最新的**有 usage 数据的** assistant 消息，
+        // 读取其 prompt_tokens 和 context_window_tokens。
+        // 过滤 prompt_tokens IS NOT NULL 确保跳过 error/cancel 消息（usage 为 NULL）。
+        let last_sql = format!(
+            "SELECT m.session_id, m.prompt_tokens, m.context_window_tokens \
+             FROM messages m \
+             INNER JOIN ( \
+                SELECT session_id, MAX(seq) AS max_seq \
+                FROM messages \
+                WHERE session_id IN ({placeholders}) AND role = 'assistant' \
+                    AND prompt_tokens IS NOT NULL \
+                GROUP BY session_id \
+             ) latest ON m.session_id = latest.session_id AND m.seq = latest.max_seq"
+        );
+        let mut stmt2 = conn.prepare(&last_sql)?;
+        let params2: Vec<&dyn rusqlite::ToSql> = session_ids
+            .iter()
+            .map(|s| s as &dyn rusqlite::ToSql)
+            .collect();
+        let last_rows = stmt2.query_map(params2.as_slice(), |row| {
+            Ok((
+                row.get::<_, String>(0)?,
+                row.get::<_, Option<i64>>(1)?,
+                row.get::<_, Option<i64>>(2)?,
+            ))
+        })?;
+        for row in last_rows {
+            let (sid, last_prompt, last_ctx_window) = row?;
+            let entry = stats.entry(sid).or_insert(SessionTokenStats {
+                prompt_tokens: 0,
+                completion_tokens: 0,
+                total_tokens: 0,
+                last_prompt_tokens: None,
+                context_window_tokens: None,
+            });
+            entry.last_prompt_tokens = last_prompt.map(|v| v as u32);
+            entry.context_window_tokens = last_ctx_window.map(|v| v as u32);
+        }
+
+        Ok(stats)
+    }
+
     pub fn replace_todos(
         &self,
         scope_key: &str,
@@ -1750,8 +1855,8 @@ fn insert_message_with_seq(
         "
         INSERT INTO messages (
             id, session_id, seq, role, content,
-            system_context, reasoning_content, media_refs_json, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, created_at
-        ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13)
+            system_context, reasoning_content, media_refs_json, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, prompt_tokens, completion_tokens, total_tokens, context_window_tokens, created_at
+        ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14, ?15, ?16, ?17)
         ",
         params![
             message.id,
@@ -1766,6 +1871,10 @@ fn insert_message_with_seq(
             message.tool_name,
             tool_calls_json,
             message.tool_duration_ms.map(|v| v as i64),
+            message.usage.as_ref().map(|u| u.prompt_tokens as i64),
+            message.usage.as_ref().map(|u| u.completion_tokens as i64),
+            message.usage.as_ref().map(|u| u.total_tokens as i64),
+            message.usage.as_ref().and_then(|u| u.context_window_tokens.map(|v| v as i64)),
             message.timestamp,
         ],
     )?;
@@ -1794,8 +1903,8 @@ fn insert_message_with_topic_seq(
         "
         INSERT INTO messages (
             id, session_id, topic_id, seq, role, content,
-            system_context, reasoning_content, media_refs_json, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, created_at
-        ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14)
+            system_context, reasoning_content, media_refs_json, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, prompt_tokens, completion_tokens, total_tokens, context_window_tokens, created_at
+        ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14, ?15, ?16, ?17, ?18)
         ",
         params![
             message.id,
@@ -1811,6 +1920,10 @@ fn insert_message_with_topic_seq(
             message.tool_name,
             tool_calls_json,
             message.tool_duration_ms.map(|v| v as i64),
+            message.usage.as_ref().map(|u| u.prompt_tokens as i64),
+            message.usage.as_ref().map(|u| u.completion_tokens as i64),
+            message.usage.as_ref().map(|u| u.total_tokens as i64),
+            message.usage.as_ref().and_then(|u| u.context_window_tokens.map(|v| v as i64)),
             message.timestamp,
         ],
     )?;
@@ -1831,6 +1944,8 @@ fn clone_message_for_compaction(message: &ChatMessage, timestamp: i64) -> ChatMe
         tool_state: message.tool_state.clone(),
         tool_duration_ms: message.tool_duration_ms,
         tool_calls: message.tool_calls.clone(),
+        // 压缩克隆不保留 usage：压缩产生的是合成消息，不代表真实 LLM 调用
+        usage: None,
     }
 }
 
@@ -1842,7 +1957,7 @@ fn load_messages_between(
 ) -> Result<Vec<ChatMessage>, StorageError> {
     let mut stmt = conn.prepare(
         "
-        SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms
+        SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, prompt_tokens, completion_tokens, total_tokens, context_window_tokens
         FROM messages
         WHERE session_id = ?1 AND seq > ?2 AND seq <= ?3
         ORDER BY seq ASC
@@ -1888,6 +2003,7 @@ fn load_messages_between(
                 tool_state: None,
                 tool_duration_ms: row.get::<_, Option<i64>>(10)?.map(|v| v as u64),
                 tool_calls,
+                usage: map_usage_row(row, 11, 12, 13, 14)?,
             })
         },
     )?;
@@ -1906,7 +2022,7 @@ fn load_messages_after(
 ) -> Result<Vec<ChatMessage>, StorageError> {
     let mut stmt = conn.prepare(
         "
-        SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms
+        SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms, prompt_tokens, completion_tokens, total_tokens, context_window_tokens
         FROM messages
         WHERE session_id = ?1 AND seq > ?2
         ORDER BY seq ASC
@@ -1949,6 +2065,7 @@ fn load_messages_after(
             tool_state: None,
             tool_duration_ms: row.get::<_, Option<i64>>(10)?.map(|v| v as u64),
             tool_calls,
+            usage: map_usage_row(row, 11, 12, 13, 14)?,
         })
     })?;
 

src/storage/records.rs

@@ -111,6 +111,16 @@ pub struct TopicRecord {
     pub message_count: i64,
 }
 
+/// 单个 session 的 token 用量统计（聚合结果）。
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct SessionTokenStats {
+    pub prompt_tokens: u64,
+    pub completion_tokens: u64,
+    pub total_tokens: u64,
+    pub last_prompt_tokens: Option<u32>,
+    pub context_window_tokens: Option<u32>,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct MemoryRecord {
     pub id: String,

src/storage/row_mapping.rs

@@ -8,12 +8,41 @@
 use rusqlite::{Connection, OptionalExtension, params};
 
 use crate::bus::ChatMessage;
+use crate::bus::message::MessageUsage;
 
 use super::{
     MemoryRecord, SchedulerJobRecord, SchedulerJobState, SchedulerJobStatus, SessionRecord,
     SkillEventRecord, StorageError,
 };
 
+/// 从指定列索引读取 token usage 四元组（含 context_window_tokens）。
+pub(super) fn map_usage_row(
+    row: &rusqlite::Row<'_>,
+    prompt_idx: usize,
+    completion_idx: usize,
+    total_idx: usize,
+    context_window_idx: usize,
+) -> rusqlite::Result<Option<MessageUsage>> {
+    let prompt: Option<i64> = row.get(prompt_idx)?;
+    let completion: Option<i64> = row.get(completion_idx)?;
+    let total: Option<i64> = row.get(total_idx)?;
+    let context_window: Option<i64> = row.get(context_window_idx)?;
+    if prompt.is_none()
+        && completion.is_none()
+        && total.is_none()
+        && context_window.is_none()
+    {
+        Ok(None)
+    } else {
+        Ok(Some(MessageUsage {
+            prompt_tokens: prompt.unwrap_or(0) as u32,
+            completion_tokens: completion.unwrap_or(0) as u32,
+            total_tokens: total.unwrap_or(0) as u32,
+            context_window_tokens: context_window.map(|v| v as u32),
+        }))
+    }
+}
+
 pub(super) fn get_session_with_conn(
     conn: &Connection,
     session_id: &str,
@@ -147,6 +176,7 @@ pub(super) fn map_chat_message_row(row: &rusqlite::Row<'_>) -> rusqlite::Result<
         tool_state: None,
         tool_duration_ms: row.get::<_, Option<i64>>(10)?.map(|v| v as u64),
         tool_calls,
+        usage: map_usage_row(row, 11, 12, 13, 14)?,
     })
 }
 

web/src/components/Sidebar/TopicList.tsx

@@ -12,8 +12,9 @@ import {
   ChevronLeft,
   ChevronRight,
   Edit2,
+  Coins,
 } from 'lucide-react';
-import type { Topic } from '../../types/protocol';
+import type { Topic, TopicTokenStats } from '../../types/protocol';
 
 interface TopicListProps {
   sessionId: string | null;
@@ -43,6 +44,28 @@ function formatTime(timestamp: number): string {
   }
 }
 
+/** 紧凑格式化 token 数量：1234 -> "1.2K"，1234567 -> "1.2M" */
+function formatTokenCount(n: number): string {
+  if (n >= 1_000_000) return `${(n / 1_000_000).toFixed(1)}M`;
+  if (n >= 1_000) return `${(n / 1_000).toFixed(1)}K`;
+  return String(n);
+}
+
+/** 计算上下文窗口占用百分比：last_prompt_tokens / context_window_tokens */
+function contextOccupancyPct(stats: TopicTokenStats): number | null {
+  if (!stats.context_window_tokens || stats.context_window_tokens === 0) return null;
+  const last = stats.last_prompt_tokens;
+  if (last == null) return null;
+  return Math.min(100, Math.round((last / stats.context_window_tokens) * 100));
+}
+
+/** 根据占用率返回颜色 class */
+function occupancyColor(pct: number): string {
+  if (pct >= 80) return 'text-red-400';
+  if (pct >= 50) return 'text-amber-400';
+  return 'text-emerald-400';
+}
+
 export function TopicList({
   sessionId,
   topics,
@@ -253,7 +276,7 @@ export function TopicList({
                           >
                             {topic.description || topic.title}
                           </div>
-                          <div className="flex items-center gap-3 mt-1.5">
+                          <div className="flex flex-wrap items-center gap-x-3 gap-y-1 mt-1.5">
                             <span className="text-xs text-[var(--text-muted)] flex items-center gap-1">
                               <Hash className="h-3 w-3" />
                               {topic.message_count} 条消息
@@ -262,6 +285,29 @@ export function TopicList({
                               <Clock className="h-3 w-3" />
                               {formatTime(topic.updated_at)}
                             </span>
+                            {topic.tokenStats && topic.tokenStats.total_tokens > 0 && (
+                              <>
+                                <span
+                                  className="text-xs text-[var(--text-muted)] flex items-center gap-1"
+                                  title={`输入 ${formatTokenCount(topic.tokenStats.prompt_tokens)} / 输出 ${formatTokenCount(topic.tokenStats.completion_tokens)}`}
+                                >
+                                  <Coins className="h-3 w-3" />
+                                  {formatTokenCount(topic.tokenStats.total_tokens)}
+                                </span>
+                                {(() => {
+                                  const pct = contextOccupancyPct(topic.tokenStats!);
+                                  if (pct == null) return null;
+                                  return (
+                                    <span
+                                      className={`text-xs flex items-center gap-1 ${occupancyColor(pct)}`}
+                                      title={`上下文窗口占用 ${pct}%（${formatTokenCount(topic.tokenStats!.last_prompt_tokens!)} / ${formatTokenCount(topic.tokenStats!.context_window_tokens)}）`}
+                                    >
+                                      ctx {pct}%
+                                    </span>
+                                  );
+                                })()}
+                              </>
+                            )}
                           </div>
                         </div>
                         {topic.id === currentTopicId && (

web/src/hooks/chat/useTopics.ts

@@ -40,6 +40,7 @@ function mapTopicSummaries(summaries: TopicSummary[]): Topic[] {
     message_count: Number(t.message_count),
     created_at: t.created_at,
     updated_at: t.last_active_at,
+    tokenStats: t.token_stats,
   }));
 }
 

web/src/types/protocol.ts

@@ -149,6 +149,14 @@ export interface SessionSaved {
   filepath: string;
 }
 
+export interface TopicTokenStats {
+  prompt_tokens: number;
+  completion_tokens: number;
+  total_tokens: number;
+  last_prompt_tokens?: number;
+  context_window_tokens: number;
+}
+
 export interface TopicSummary {
   topic_id: string;
   session_id: string;
@@ -157,6 +165,7 @@ export interface TopicSummary {
   message_count: number;
   created_at: number;
   last_active_at: number;
+  token_stats?: TopicTokenStats;
 }
 
 export interface TopicList {
@@ -508,6 +517,7 @@ export interface Topic {
   message_count: number;
   created_at: number;
   updated_at: number;
+  tokenStats?: TopicTokenStats;
 }
 
 export interface Session {