feat(agent_profile): 实现代理配置文件的注入与周期性重注入机制

README.md

@@ -2,6 +2,23 @@ PicoBot
 
 Skills (initial implementation)
 
+Agent profile injection
+
+PicoBot maintains a persistent agent profile file at ~/.picobot/agent/AGENT.md.
+
+Behavior:
+- The directory ~/.picobot/agent is created automatically when needed.
+- If AGENT.md does not exist yet, PicoBot creates it with a default profile.
+- When the active conversation is empty or has just been reset, AGENT.md is loaded as the first system message in the active history.
+- After every configured number of user turns, PicoBot injects the latest AGENT.md content again before the next user message is appended.
+
+Config:
+- Set gateway.agent_prompt_reinject_every in ~/.picobot/config.json.
+- Default value is 100.
+- Set it to 0 to disable periodic reinjection.
+
+This profile is persisted in session history, while the skills index system prompt is still injected dynamically by AgentLoop.
+
 PicoBot now supports filesystem skills.
 
 Skill discovery locations:

docs/PERSISTENCE.md

@@ -48,9 +48,11 @@ PicoBot 使用 SQLite 持久化会话和消息历史，当前只有一份数据
 2. `SessionManager` 定位到对应 channel 的运行时 `Session`。
 3. `Session::ensure_persistent_session(chat_id)` 确保数据库里有对应会话记录。
 4. `Session::ensure_chat_loaded(chat_id)` 在内存中没有历史时，从 `messages` 表加载该会话全部历史。
-5. 新的用户消息先写入 `messages`，再放入内存历史。
-6. Agent 执行后产生的 assistant/tool 消息按实际顺序继续写入 `messages`。
-7. 下次进程重启或 session 过期后，可从数据库完整恢复上下文。
+5. 如果当前活动段历史为空，系统会从 `~/.picobot/agent/AGENT.md` 读取 Agent 基本设定，并先写入一条 `system` 消息。
+6. 在新的用户消息进入前，系统会检查当前活动段的 `user_turn_count` 是否刚跨过配置项 `gateway.agent_prompt_reinject_every` 指定的下一轮阈值；如果跨过，就再次把 `AGENT.md` 写入一条新的 `system` 消息。
+7. 新的用户消息先写入 `messages`，再放入内存历史。
+8. Agent 执行后产生的 assistant/tool 消息按实际顺序继续写入 `messages`。
+9. 下次进程重启或 session 过期后，可从数据库完整恢复上下文。
 
 ## 3. 会话标识规则
 
@@ -86,6 +88,8 @@ PicoBot 使用 SQLite 持久化会话和消息历史，当前只有一份数据
 | `deleted_at` | `INTEGER` | 删除时间 | 预留字段，当前读取逻辑会过滤该字段，但当前删除实现是物理删除 |
 | `message_count` | `INTEGER NOT NULL DEFAULT 0` | 消息数 | 追加消息时自增，清空历史时重置 |
 | `reset_cutoff_seq` | `INTEGER NOT NULL DEFAULT 0` | 逻辑重置切点 | `/reset` 后默认只恢复 `seq > reset_cutoff_seq` 的活动段 |
+| `user_turn_count` | `INTEGER NOT NULL DEFAULT 0` | 当前活动段用户轮次数 | 只在追加 `role = user` 消息时递增，清空历史和 `/reset` 时归零 |
+| `agent_prompt_reinjection_count` | `INTEGER NOT NULL DEFAULT 0` | AGENT.md 周期重注入次数 | 每完成一次“达到配置阈值后的下一轮前注入”就递增，清空历史和 `/reset` 时归零 |
 
 索引：
 
@@ -171,6 +175,8 @@ PicoBot 使用 SQLite 持久化会话和消息历史，当前只有一份数据
 
 其中第 6 步很重要：归档会话一旦收到新消息，会自动恢复为活跃态。
 
+另外，只有 `role = user` 的消息会递增 `user_turn_count`；`system`、`assistant`、`tool` 消息不会影响周期注入阈值的判定。
+
 ### 6.3 读取历史
 
 `load_messages(session_id)` 会按 `seq ASC` 读取当前活动段历史，并把 JSON 字段反序列化回 `ChatMessage`。活动段的定义是：
@@ -236,6 +242,8 @@ PicoBot 使用 SQLite 持久化会话和消息历史，当前只有一份数据
 - 删除该会话在 `messages` 中的所有记录
 - 将 `sessions.message_count` 重置为 0
 - 将 `sessions.reset_cutoff_seq` 重置为 0
+- 将 `sessions.user_turn_count` 重置为 0
+- 将 `sessions.agent_prompt_reinjection_count` 重置为 0
 - 更新 `updated_at` 和 `last_active_at`
 - 保留会话本身
 
@@ -247,11 +255,15 @@ PicoBot 使用 SQLite 持久化会话和消息历史，当前只有一份数据
 
 - 不删除 `messages` 中的任何记录
 - 将当前会话的 `MAX(seq)` 写入 `sessions.reset_cutoff_seq`
+- 将 `sessions.user_turn_count` 重置为 0
+- 将 `sessions.agent_prompt_reinjection_count` 重置为 0
 - 更新 `updated_at` 和 `last_active_at`
 - 后续默认恢复和发给模型的历史，只包含这次重置之后新增的消息
 
 这适合“开始新对话，但保留完整历史以便审计或未来检索”的场景。
 
+由于 AGENT.md 注入消息也会持久化，`/reset` 前的 Agent 设定消息仍会保留在完整历史中，但不会继续出现在新的活动段。下一次活动段首次加载时，系统会重新读取当前版本的 `~/.picobot/agent/AGENT.md`，并把它作为新的首条系统消息写入活动段。
+
 ### 8.5 删除会话
 
 `delete_session(session_id)`：

src/config/mod.rs

@@ -136,6 +136,8 @@ pub struct GatewayConfig {
     pub port: u16,
     #[serde(default, rename = "session_ttl_hours")]
     pub session_ttl_hours: Option<u64>,
+    #[serde(default = "default_agent_prompt_reinject_every", rename = "agent_prompt_reinject_every")]
+    pub agent_prompt_reinject_every: u64,
 }
 
 #[derive(Debug, Clone, Deserialize, Serialize)]
@@ -156,12 +158,17 @@ fn default_gateway_url() -> String {
     "ws://127.0.0.1:19876/ws".to_string()
 }
 
+fn default_agent_prompt_reinject_every() -> u64 {
+    100
+}
+
 impl Default for GatewayConfig {
     fn default() -> Self {
         Self {
             host: default_gateway_host(),
             port: default_gateway_port(),
             session_ttl_hours: None,
+            agent_prompt_reinject_every: default_agent_prompt_reinject_every(),
         }
     }
 }
@@ -344,7 +351,8 @@ mod tests {
     },
     "gateway": {
         "host": "0.0.0.0",
-        "port": 19876
+        "port": 19876,
+        "agent_prompt_reinject_every": 120
     }
 }"#,
                 )
@@ -387,5 +395,39 @@ mod tests {
         let config = Config::load(file.path().to_str().unwrap()).unwrap();
         assert_eq!(config.gateway.host, "0.0.0.0");
         assert_eq!(config.gateway.port, 19876);
+        assert_eq!(config.gateway.agent_prompt_reinject_every, 120);
+    }
+
+    #[test]
+    fn test_gateway_config_defaults_agent_prompt_reinject_every() {
+        let file = tempfile::NamedTempFile::new().unwrap();
+        std::fs::write(
+            file.path(),
+            r#"{
+    "providers": {
+        "aliyun": {
+            "type": "openai",
+            "base_url": "https://example.invalid/v1",
+            "api_key": "test-key",
+            "extra_headers": {}
+        }
+    },
+    "models": {
+        "qwen-plus": {
+            "model_id": "qwen-plus"
+        }
+    },
+    "agents": {
+        "default": {
+            "provider": "aliyun",
+            "model": "qwen-plus"
+        }
+    }
+}"#,
+        )
+        .unwrap();
+
+        let config = Config::load(file.path().to_str().unwrap()).unwrap();
+        assert_eq!(config.gateway.agent_prompt_reinject_every, 100);
     }
 }

src/gateway/mod.rs

@@ -29,10 +29,16 @@ impl GatewayState {
 
         // Session TTL from config (default 4 hours)
         let session_ttl_hours = config.gateway.session_ttl_hours.unwrap_or(4);
+        let agent_prompt_reinject_every = config.gateway.agent_prompt_reinject_every;
 
         let skills = Arc::new(SkillRuntime::from_config(config.skills.clone()));
 
-        let session_manager = SessionManager::new(session_ttl_hours, provider_config, skills)?;
+        let session_manager = SessionManager::new(
+            session_ttl_hours,
+            agent_prompt_reinject_every,
+            provider_config,
+            skills,
+        )?;
         let channel_manager = ChannelManager::new();
         let bus = channel_manager.bus();
 

src/gateway/session.rs

@@ -1,4 +1,5 @@
 use std::collections::HashMap;
+use std::fs;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
 use async_trait::async_trait;
@@ -16,6 +17,8 @@ use crate::tools::{
     WebFetchTool,
 };
 
+const DEFAULT_AGENT_PROMPT: &str = "# PicoBot 代理配置\n\n## 身份\n- 你是 PicoBot，一名务实、可靠的通用助理。\n- 你的目标是理解用户当下的真实需求，并给出清晰、可执行的帮助。\n\n## 工作方式\n- 优先理解意图，再给出回应或行动。\n- 保持简洁、准确、自然，不故作热情，也不空泛铺陈。\n- 能直接验证的内容尽量先验证，避免凭空猜测。\n- 当现有工具是完成任务的最直接方式时，优先使用工具。\n- 除非用户明确要求改变方向，否则保持用户原本目标不变。\n\n## 助理原则\n- 优先解决问题，而不是展示过程。\n- 输出要方便用户立即使用，结论尽量明确。\n- 对不确定的地方要直说，不把猜测包装成事实。\n- 复杂任务先收敛重点，简单任务直接给结果。\n- 避免不必要的重复、客套和冗长说明。\n\n## 回复规则\n- 除非用户另有要求，否则使用中文回复。\n- 默认短而清楚，按信息密度组织内容。\n- 如果任务涉及文件、命令、配置或下一步操作，优先给出最关键的那部分。\n- 如果存在限制、风险或前提条件，要直接说明。\n\n## 补充要求\n- 你是 PicoBot。\n- 回答应以帮助用户完成当前目标为中心。\n- 在信息不足时先补关键前提，在信息充分时直接执行。\n";
+
 /// Session 按 channel 隔离，每个 channel 一个 Session
 /// History 按 chat_id 隔离，由 Session 统一管理
 pub struct Session {
@@ -29,6 +32,7 @@ pub struct Session {
     skills: Arc<SkillRuntime>,
     compressor: ContextCompressor,
     store: Arc<SessionStore>,
+    agent_prompt_reinject_every: i64,
 }
 
 pub struct BusToolCallEmitter {
@@ -79,6 +83,7 @@ impl Session {
         tools: Arc<ToolRegistry>,
         skills: Arc<SkillRuntime>,
         store: Arc<SessionStore>,
+        agent_prompt_reinject_every: u64,
     ) -> Result<Self, AgentError> {
         Ok(Self {
             id: Uuid::new_v4(),
@@ -90,6 +95,7 @@ impl Session {
             skills,
             compressor: ContextCompressor::new(provider_config.token_limit),
             store,
+            agent_prompt_reinject_every: agent_prompt_reinject_every as i64,
         })
     }
 
@@ -113,6 +119,33 @@ impl Session {
             .load_messages(&self.persistent_session_id(chat_id))
             .map_err(|err| AgentError::Other(format!("session history load error: {}", err)))?;
         self.chat_histories.insert(chat_id.to_string(), history);
+        self.ensure_initial_agent_prompt(chat_id)?;
+        Ok(())
+    }
+
+    pub fn ensure_agent_prompt_before_user_message(&mut self, chat_id: &str) -> Result<(), AgentError> {
+        self.ensure_chat_loaded(chat_id)?;
+
+        let session_id = self.persistent_session_id(chat_id);
+        let session_record = self
+            .store
+            .get_session(&session_id)
+            .map_err(|err| AgentError::Other(format!("get session error: {}", err)))?
+            .ok_or_else(|| AgentError::Other("Session not found".to_string()))?;
+
+        if self.agent_prompt_reinject_every > 0
+            && session_record.user_turn_count > 0
+            && session_record.user_turn_count / self.agent_prompt_reinject_every
+                > session_record.agent_prompt_reinjection_count
+        {
+            if let Some(agent_prompt) = load_agent_prompt()? {
+                self.append_persisted_message(chat_id, ChatMessage::system(agent_prompt))?;
+                self.store
+                    .mark_agent_prompt_reinjected(&session_id)
+                    .map_err(|err| AgentError::Other(format!("mark agent prompt reinjection error: {}", err)))?;
+            }
+        }
+
         Ok(())
     }
 
@@ -264,6 +297,51 @@ impl Session {
                 })
         })
     }
+
+    fn ensure_initial_agent_prompt(&mut self, chat_id: &str) -> Result<(), AgentError> {
+        let history_is_empty = self
+            .get_history(chat_id)
+            .map(|history| history.is_empty())
+            .unwrap_or(true);
+
+        if !history_is_empty {
+            return Ok(());
+        }
+
+        if let Some(agent_prompt) = load_agent_prompt()? {
+            self.append_persisted_message(chat_id, ChatMessage::system(agent_prompt))?;
+        }
+
+        Ok(())
+    }
+}
+
+fn load_agent_prompt() -> Result<Option<String>, AgentError> {
+    let path = agent_prompt_path()?;
+    if let Some(parent) = path.parent() {
+        fs::create_dir_all(parent)
+            .map_err(|err| AgentError::Other(format!("create agent prompt dir error: {}", err)))?;
+    }
+
+    if !path.exists() {
+        fs::write(&path, DEFAULT_AGENT_PROMPT)
+            .map_err(|err| AgentError::Other(format!("create agent prompt file error: {}", err)))?;
+    }
+
+    let content = fs::read_to_string(&path)
+        .map_err(|err| AgentError::Other(format!("read agent prompt file error: {}", err)))?;
+    let trimmed = content.trim();
+    if trimmed.is_empty() {
+        return Ok(None);
+    }
+
+    Ok(Some(trimmed.to_string()))
+}
+
+fn agent_prompt_path() -> Result<std::path::PathBuf, AgentError> {
+    let home = dirs::home_dir()
+        .ok_or_else(|| AgentError::Other("home directory not found".to_string()))?;
+    Ok(home.join(".picobot").join("agent").join("AGENT.md"))
 }
 
 /// SessionManager 管理所有 Session，按 channel_name 路由
@@ -274,6 +352,7 @@ pub struct SessionManager {
     tools: Arc<ToolRegistry>,
     skills: Arc<SkillRuntime>,
     store: Arc<SessionStore>,
+    agent_prompt_reinject_every: u64,
 }
 
 struct SessionManagerInner {
@@ -331,6 +410,7 @@ pub(crate) fn handle_in_chat_command(
 impl SessionManager {
     pub fn new(
         session_ttl_hours: u64,
+        agent_prompt_reinject_every: u64,
         provider_config: LLMProviderConfig,
         skills: Arc<SkillRuntime>,
     ) -> Result<Self, AgentError> {
@@ -353,6 +433,7 @@ impl SessionManager {
             tools: Arc::new(default_tools(skills.clone(), store.clone())),
             skills,
             store,
+            agent_prompt_reinject_every,
         })
     }
 
@@ -447,6 +528,7 @@ impl SessionManager {
                 self.tools.clone(),
                 self.skills.clone(),
                 self.store.clone(),
+                self.agent_prompt_reinject_every,
             )
             .await?;
             let arc = Arc::new(Mutex::new(session));
@@ -523,6 +605,8 @@ impl SessionManager {
                 )]);
             }
 
+            session_guard.ensure_agent_prompt_before_user_message(chat_id)?;
+
             // 添加用户消息到历史
             let media_refs: Vec<String> = media.iter().map(|m| m.path.clone()).collect();
             #[cfg(debug_assertions)]
@@ -633,6 +717,7 @@ mod tests {
             tools,
             skills,
             store.clone(),
+            100,
         )
         .await
         .unwrap();
@@ -658,7 +743,113 @@ mod tests {
                 .load_all_messages(&session.persistent_session_id("chat-1"))
                 .unwrap()
                 .len(),
-            1,
+            2,
         );
     }
+
+    #[tokio::test]
+    async fn test_ensure_chat_loaded_injects_agent_prompt_as_first_message() {
+        let store = Arc::new(SessionStore::in_memory().unwrap());
+        let (user_tx, _user_rx) = mpsc::channel(4);
+        let skills = Arc::new(SkillRuntime::default());
+        let tools = Arc::new(default_tools(skills.clone(), store.clone()));
+        let mut session = Session::new(
+            "feishu".to_string(),
+            test_provider_config(),
+            user_tx,
+            tools,
+            skills,
+            store.clone(),
+            100,
+        )
+        .await
+        .unwrap();
+
+        session.ensure_persistent_session("chat-1").unwrap();
+        session.ensure_chat_loaded("chat-1").unwrap();
+
+        let history = session.get_history("chat-1").unwrap();
+        assert_eq!(history.len(), 1);
+        assert_eq!(history[0].role, "system");
+        assert!(history[0].content.contains("PicoBot 代理配置"));
+    }
+
+    #[tokio::test]
+    async fn test_agent_prompt_reinjected_after_each_hundred_user_turns() {
+        let store = Arc::new(SessionStore::in_memory().unwrap());
+        let (user_tx, _user_rx) = mpsc::channel(4);
+        let skills = Arc::new(SkillRuntime::default());
+        let tools = Arc::new(default_tools(skills.clone(), store.clone()));
+        let mut session = Session::new(
+            "feishu".to_string(),
+            test_provider_config(),
+            user_tx,
+            tools,
+            skills,
+            store.clone(),
+            100,
+        )
+        .await
+        .unwrap();
+
+        session.ensure_persistent_session("chat-1").unwrap();
+        session.ensure_chat_loaded("chat-1").unwrap();
+
+        for turn in 0..100 {
+            session
+                .append_persisted_message("chat-1", ChatMessage::user(format!("user-{turn}")))
+                .unwrap();
+        }
+
+        session.ensure_agent_prompt_before_user_message("chat-1").unwrap();
+
+        let history = session.get_history("chat-1").unwrap();
+        let system_messages = history.iter().filter(|message| message.role == "system").count();
+        assert_eq!(system_messages, 2);
+
+        let stored = store
+            .get_session(&session.persistent_session_id("chat-1"))
+            .unwrap()
+            .unwrap();
+        assert_eq!(stored.agent_prompt_reinjection_count, 1);
+
+        session.ensure_agent_prompt_before_user_message("chat-1").unwrap();
+        let history = session.get_history("chat-1").unwrap();
+        let system_messages = history.iter().filter(|message| message.role == "system").count();
+        assert_eq!(system_messages, 2);
+    }
+
+    #[tokio::test]
+    async fn test_agent_prompt_reinjection_can_be_disabled_by_config() {
+        let store = Arc::new(SessionStore::in_memory().unwrap());
+        let (user_tx, _user_rx) = mpsc::channel(4);
+        let skills = Arc::new(SkillRuntime::default());
+        let tools = Arc::new(default_tools(skills.clone(), store.clone()));
+        let mut session = Session::new(
+            "feishu".to_string(),
+            test_provider_config(),
+            user_tx,
+            tools,
+            skills,
+            store.clone(),
+            0,
+        )
+        .await
+        .unwrap();
+
+        session.ensure_persistent_session("chat-1").unwrap();
+        session.ensure_chat_loaded("chat-1").unwrap();
+
+        for turn in 0..100 {
+            session
+                .append_persisted_message("chat-1", ChatMessage::user(format!("user-{turn}")))
+                .unwrap();
+        }
+
+        session.ensure_agent_prompt_before_user_message("chat-1").unwrap();
+
+        let history = session.get_history("chat-1").unwrap();
+        let system_messages = history.iter().filter(|message| message.role == "system").count();
+        assert_eq!(system_messages, 1);
+    }
 }

src/gateway/ws.rs

@@ -59,6 +59,7 @@ async fn handle_socket(ws: WebSocket, state: Arc<GatewayState>) {
         state.session_manager.tools(),
         state.session_manager.skills(),
         state.session_manager.store(),
+        state.config.gateway.agent_prompt_reinject_every,
     )
     .await
     {
@@ -210,6 +211,8 @@ async fn handle_inbound(
                 return Ok(());
             }
 
+            session_guard.ensure_agent_prompt_before_user_message(&chat_id)?;
+
             let user_message = session_guard.create_user_message(&content, Vec::new());
             let user_message_id = user_message.id.clone();
             session_guard.append_persisted_message(&chat_id, user_message)?;

src/storage/mod.rs

@@ -40,6 +40,8 @@ pub struct SessionRecord {
     pub deleted_at: Option<i64>,
     pub message_count: i64,
     pub reset_cutoff_seq: i64,
+    pub user_turn_count: i64,
+    pub agent_prompt_reinjection_count: i64,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -113,7 +115,9 @@ impl SessionStore {
                 archived_at INTEGER,
                 deleted_at INTEGER,
                 message_count INTEGER NOT NULL DEFAULT 0,
-                reset_cutoff_seq INTEGER NOT NULL DEFAULT 0
+                reset_cutoff_seq INTEGER NOT NULL DEFAULT 0,
+                user_turn_count INTEGER NOT NULL DEFAULT 0,
+                agent_prompt_reinjection_count INTEGER NOT NULL DEFAULT 0
             );
 
             CREATE INDEX IF NOT EXISTS idx_sessions_channel_archived
@@ -234,8 +238,9 @@ impl SessionStore {
             "
             INSERT INTO sessions (
                 id, title, channel_name, chat_id, summary,
-                created_at, updated_at, last_active_at, archived_at, deleted_at, message_count
-            ) VALUES (?1, ?2, 'cli', ?3, NULL, ?4, ?4, ?4, NULL, NULL, 0)
+                created_at, updated_at, last_active_at, archived_at, deleted_at, message_count,
+                reset_cutoff_seq, user_turn_count, agent_prompt_reinjection_count
+            ) VALUES (?1, ?2, 'cli', ?3, NULL, ?4, ?4, ?4, NULL, NULL, 0, 0, 0, 0)
             ",
             params![id, title, id, now],
         )?;
@@ -261,8 +266,9 @@ impl SessionStore {
             "
             INSERT INTO sessions (
                 id, title, channel_name, chat_id, summary,
-                created_at, updated_at, last_active_at, archived_at, deleted_at, message_count
-            ) VALUES (?1, ?2, ?3, ?4, NULL, ?5, ?5, ?5, NULL, NULL, 0)
+                created_at, updated_at, last_active_at, archived_at, deleted_at, message_count,
+                reset_cutoff_seq, user_turn_count, agent_prompt_reinjection_count
+            ) VALUES (?1, ?2, ?3, ?4, NULL, ?5, ?5, ?5, NULL, NULL, 0, 0, 0, 0)
             ",
             params![session_id, title, channel_name, chat_id, now],
         )?;
@@ -277,7 +283,8 @@ impl SessionStore {
             "
             SELECT id, title, channel_name, chat_id, summary,
                    created_at, updated_at, last_active_at,
-                     archived_at, deleted_at, message_count, reset_cutoff_seq
+                     archived_at, deleted_at, message_count, reset_cutoff_seq,
+                     user_turn_count, agent_prompt_reinjection_count
             FROM sessions
             WHERE id = ?1 AND deleted_at IS NULL
             ",
@@ -298,7 +305,8 @@ impl SessionStore {
             "
             SELECT id, title, channel_name, chat_id, summary,
                    created_at, updated_at, last_active_at,
-                     archived_at, deleted_at, message_count, reset_cutoff_seq
+                                     archived_at, deleted_at, message_count, reset_cutoff_seq,
+                                     user_turn_count, agent_prompt_reinjection_count
             FROM sessions
             WHERE channel_name = ?1
               AND deleted_at IS NULL
@@ -354,7 +362,12 @@ impl SessionStore {
         conn.execute(
             "
             UPDATE sessions
-            SET message_count = 0, updated_at = ?2, last_active_at = ?2, reset_cutoff_seq = 0
+            SET message_count = 0,
+                updated_at = ?2,
+                last_active_at = ?2,
+                reset_cutoff_seq = 0,
+                user_turn_count = 0,
+                agent_prompt_reinjection_count = 0
             WHERE id = ?1 AND deleted_at IS NULL
             ",
             params![session_id, now],
@@ -379,7 +392,9 @@ impl SessionStore {
             SET reset_cutoff_seq = ?2,
                 updated_at = ?3,
                 last_active_at = ?3,
-                archived_at = NULL
+                archived_at = NULL,
+                user_turn_count = 0,
+                agent_prompt_reinjection_count = 0
             WHERE id = ?1 AND deleted_at IS NULL
             ",
             params![session_id, cutoff_seq, now],
@@ -423,10 +438,31 @@ impl SessionStore {
         )?;
 
         let now = current_timestamp();
+        let is_user_message = message.role == "user";
         tx.execute(
             "
             UPDATE sessions
             SET message_count = message_count + 1,
+                user_turn_count = user_turn_count + ?3,
+                updated_at = ?2,
+                last_active_at = ?2,
+                archived_at = NULL
+            WHERE id = ?1 AND deleted_at IS NULL
+            ",
+            params![session_id, now, if is_user_message { 1 } else { 0 }],
+        )?;
+
+        tx.commit()?;
+        Ok(())
+    }
+
+    pub fn mark_agent_prompt_reinjected(&self, session_id: &str) -> Result<(), StorageError> {
+        let now = current_timestamp();
+        let conn = self.conn.lock().expect("session db mutex poisoned");
+        conn.execute(
+            "
+            UPDATE sessions
+            SET agent_prompt_reinjection_count = agent_prompt_reinjection_count + 1,
                 updated_at = ?2,
                 last_active_at = ?2,
                 archived_at = NULL
@@ -434,8 +470,6 @@ impl SessionStore {
             ",
             params![session_id, now],
         )?;
-
-        tx.commit()?;
         Ok(())
     }
 
@@ -779,6 +813,8 @@ fn map_session_record(row: &rusqlite::Row<'_>) -> rusqlite::Result<SessionRecord
         deleted_at: row.get(9)?,
         message_count: row.get(10)?,
         reset_cutoff_seq: row.get(11)?,
+        user_turn_count: row.get(12)?,
+        agent_prompt_reinjection_count: row.get(13)?,
     })
 }
 
@@ -829,6 +865,20 @@ fn ensure_sessions_schema(conn: &Connection) -> Result<(), StorageError> {
         )?;
     }
 
+    if !has_column(conn, "sessions", "user_turn_count")? {
+        conn.execute(
+            "ALTER TABLE sessions ADD COLUMN user_turn_count INTEGER NOT NULL DEFAULT 0",
+            [],
+        )?;
+    }
+
+    if !has_column(conn, "sessions", "agent_prompt_reinjection_count")? {
+        conn.execute(
+            "ALTER TABLE sessions ADD COLUMN agent_prompt_reinjection_count INTEGER NOT NULL DEFAULT 0",
+            [],
+        )?;
+    }
+
     Ok(())
 }
 
@@ -947,6 +997,8 @@ mod tests {
         assert_eq!(session.chat_id, session.id);
         assert_eq!(session.message_count, 0);
         assert_eq!(session.reset_cutoff_seq, 0);
+        assert_eq!(session.user_turn_count, 0);
+        assert_eq!(session.agent_prompt_reinjection_count, 0);
 
         let first = ChatMessage::user("hello");
         let second = ChatMessage::assistant("world");
@@ -957,6 +1009,8 @@ mod tests {
         assert_eq!(stored.message_count, 2);
         assert!(stored.archived_at.is_none());
         assert_eq!(stored.reset_cutoff_seq, 0);
+        assert_eq!(stored.user_turn_count, 1);
+        assert_eq!(stored.agent_prompt_reinjection_count, 0);
 
         let messages = store.load_messages(&session.id).unwrap();
         assert_eq!(messages.len(), 2);
@@ -984,6 +1038,8 @@ mod tests {
         assert!(cleared.is_empty());
         let cleared_session = store.get_session(&session.id).unwrap().unwrap();
         assert_eq!(cleared_session.message_count, 0);
+        assert_eq!(cleared_session.user_turn_count, 0);
+        assert_eq!(cleared_session.agent_prompt_reinjection_count, 0);
 
         store.delete_session(&session.id).unwrap();
         assert!(store.get_session(&session.id).unwrap().is_none());
@@ -1036,6 +1092,8 @@ mod tests {
 
         let stored = store.get_session(&session.id).unwrap().unwrap();
         assert_eq!(stored.reset_cutoff_seq, 2);
+        assert_eq!(stored.user_turn_count, 0);
+        assert_eq!(stored.agent_prompt_reinjection_count, 0);
 
         let active_messages = store.load_messages(&session.id).unwrap();
         assert!(active_messages.is_empty());
@@ -1049,6 +1107,9 @@ mod tests {
         let active_messages = store.load_messages(&session.id).unwrap();
         assert_eq!(active_messages.len(), 1);
         assert_eq!(active_messages[0].content, "after");
+
+        let stored = store.get_session(&session.id).unwrap().unwrap();
+        assert_eq!(stored.user_turn_count, 1);
     }
 
     #[test]
@@ -1091,6 +1152,20 @@ mod tests {
         let store = SessionStore::from_connection(conn).unwrap();
         let session = store.create_cli_session(Some("migrated")).unwrap();
         assert_eq!(session.reset_cutoff_seq, 0);
+        assert_eq!(session.user_turn_count, 0);
+        assert_eq!(session.agent_prompt_reinjection_count, 0);
+    }
+
+    #[test]
+    fn test_mark_agent_prompt_reinjected_increments_counter() {
+        let store = SessionStore::in_memory().unwrap();
+        let session = store.create_cli_session(Some("prompt")).unwrap();
+
+        store.mark_agent_prompt_reinjected(&session.id).unwrap();
+        store.mark_agent_prompt_reinjected(&session.id).unwrap();
+
+        let stored = store.get_session(&session.id).unwrap().unwrap();
+        assert_eq!(stored.agent_prompt_reinjection_count, 2);
     }
 
     #[test]