feat: 添加内存维护配置，优化记忆整理逻辑和限制

src/cli/init.rs

@@ -75,6 +75,7 @@ impl InitWizard {
             channels: HashMap::new(),
             skills: crate::config::SkillsConfig::default(),
             tools: crate::config::ToolsConfig::default(),
+            memory_maintenance: crate::config::MemoryMaintenanceConfig::default(),
         }
     }
 
@@ -824,6 +825,7 @@ impl InitWizard {
             client: existing.client.clone(),
             skills: existing.skills.clone(),
             tools: existing.tools.clone(),
+            memory_maintenance: existing.memory_maintenance.clone(),
         }
     }
 

src/config/mod.rs

@@ -27,6 +27,8 @@ pub struct Config {
     pub skills: SkillsConfig,
     #[serde(default)]
     pub tools: ToolsConfig,
+    #[serde(default)]
+    pub memory_maintenance: MemoryMaintenanceConfig,
 }
 
 #[derive(Debug, Clone, Deserialize, Serialize)]
@@ -108,6 +110,41 @@ pub struct ToolsConfig {
     pub task: TaskConfig,
 }
 
+#[derive(Debug, Clone, Deserialize, Serialize)]
+pub struct MemoryMaintenanceConfig {
+    /// 单次最大合并/删除比例 (0.0-1.0)，默认 0.3 (30%)
+    #[serde(default = "default_max_merge_ratio")]
+    pub max_merge_ratio: f32,
+    /// 最小保留记忆数量，默认 5
+    #[serde(default = "default_min_memories_to_keep")]
+    pub min_memories_to_keep: usize,
+    /// 单次合并最大源记忆数，默认 3
+    #[serde(default = "default_max_merge_per_group")]
+    pub max_merge_per_group: usize,
+}
+
+fn default_max_merge_ratio() -> f32 {
+    0.3
+}
+
+fn default_min_memories_to_keep() -> usize {
+    5
+}
+
+fn default_max_merge_per_group() -> usize {
+    3
+}
+
+impl Default for MemoryMaintenanceConfig {
+    fn default() -> Self {
+        Self {
+            max_merge_ratio: default_max_merge_ratio(),
+            min_memories_to_keep: default_min_memories_to_keep(),
+            max_merge_per_group: default_max_merge_per_group(),
+        }
+    }
+}
+
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct TaskConfig {
     #[serde(default = "default_task_enabled")]

src/gateway/memory_maintenance.rs

@@ -5,7 +5,7 @@ use std::time::Duration;
 use serde::{Deserialize, Serialize};
 
 use crate::agent::AgentError;
-use crate::config::LLMProviderConfig;
+use crate::config::{LLMProviderConfig, MemoryMaintenanceConfig};
 use crate::providers::{ChatCompletionRequest, Message, ProviderRuntimeConfig, create_provider};
 use crate::storage::{MemoryRecord, SessionStore};
 
@@ -17,12 +17,16 @@ const MEMORY_MAINTENANCE_STEP2_SYSTEM_PROMPT: &str =
     include_str!("memory_maintenance_step2_system_prompt.md");
 const MEMORY_MAINTENANCE_RETRY_DELAYS_MS: &[u64] = &[1_000, 3_000];
 
+const META_NAMESPACE: &str = "_meta";
+const LAST_MAINTENANCE_KEY: &str = "last_maintenance_at";
+
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
 pub(crate) struct MemoryMaintenanceCandidate {
     pub(crate) id: String,
     pub(crate) namespace: String,
     pub(crate) key: String,
     pub(crate) content: String,
+    pub(crate) updated_at: i64,  // 记忆更新时间（Unix timestamp）
 }
 
 #[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq, Eq)]
@@ -73,13 +77,19 @@ pub(crate) struct MemoryMaintenanceScopeResult {
 pub(crate) struct MemoryMaintenanceService {
     store: Arc<SessionStore>,
     provider_config: LLMProviderConfig,
+    maintenance_config: MemoryMaintenanceConfig,
 }
 
 impl MemoryMaintenanceService {
-    pub(crate) fn new(store: Arc<SessionStore>, provider_config: LLMProviderConfig) -> Self {
+    pub(crate) fn new(
+        store: Arc<SessionStore>,
+        provider_config: LLMProviderConfig,
+        maintenance_config: MemoryMaintenanceConfig,
+    ) -> Self {
         Self {
             store,
             provider_config,
+            maintenance_config,
         }
     }
 
@@ -107,6 +117,12 @@ impl MemoryMaintenanceService {
         &self,
         scope_key: &str,
     ) -> Result<Option<MemoryMaintenancePlan>, AgentError> {
+        // 新增：检查是否有新记忆需要整理
+        if !has_new_memories_since_last_maintenance(&self.store, scope_key)? {
+            tracing::info!(scope_key = %scope_key, "No new memories since last maintenance, skipping");
+            return Ok(None);
+        }
+
         let memories = self
             .store
             .list_memories_for_scope("user", scope_key)
@@ -255,7 +271,15 @@ impl MemoryMaintenanceService {
         let organize_output = self.organize_plan(scope_key, &plan).await?;
 
         // 应用整理结果（merge和delete）
-        apply_memory_maintenance_output(self.store.as_ref(), scope_key, &plan, &organize_output)?;
+        apply_memory_maintenance_output(
+            self.store.as_ref(),
+            scope_key,
+            &plan,
+            &organize_output,
+            self.maintenance_config.max_merge_ratio,
+            self.maintenance_config.min_memories_to_keep,
+            self.maintenance_config.max_merge_per_group,
+        )?;
 
         // 步骤2：从数据库重新读取剩余的记忆
         let remaining_memories = self
@@ -470,17 +494,94 @@ impl MemoryMaintenanceService {
         let organize_output = self.organize_plan(scope_key, &plan).await?;
 
         // 应用整理结果（merge和delete）
-        apply_memory_maintenance_output(self.store.as_ref(), scope_key, &plan, &organize_output)?;
+        apply_memory_maintenance_output(
+            self.store.as_ref(),
+            scope_key,
+            &plan,
+            &organize_output,
+            self.maintenance_config.max_merge_ratio,
+            self.maintenance_config.min_memories_to_keep,
+            self.maintenance_config.max_merge_per_group,
+        )?;
 
         Ok(Some(organize_output))
     }
 }
 
+/// 获取上次整理时间
+fn get_last_maintenance_time(
+    store: &SessionStore,
+    scope_key: &str,
+) -> Result<Option<i64>, crate::storage::StorageError> {
+    let meta = store.get_memory("user", scope_key, META_NAMESPACE, LAST_MAINTENANCE_KEY)?;
+    Ok(meta.and_then(|m| m.content.parse::<i64>().ok()))
+}
+
+/// 记录本次整理时间
+fn set_last_maintenance_time(
+    store: &SessionStore,
+    scope_key: &str,
+    time: i64,
+) -> Result<(), crate::storage::StorageError> {
+    store.put_memory(&crate::storage::MemoryUpsert {
+        scope_kind: "user".to_string(),
+        scope_key: scope_key.to_string(),
+        namespace: META_NAMESPACE.to_string(),
+        memory_key: LAST_MAINTENANCE_KEY.to_string(),
+        content: time.to_string(),
+        source_type: "memory_maintenance".to_string(),
+        source_session_id: None,
+        source_message_id: None,
+        source_message_seq: None,
+        source_channel_name: None,
+        source_chat_id: None,
+    })?;
+    Ok(())
+}
+
+/// 检查是否有需要整理的新记忆（过滤掉 _meta namespace）
+fn has_new_memories_since_last_maintenance(
+    store: &SessionStore,
+    scope_key: &str,
+) -> Result<bool, AgentError> {
+    let memories = store
+        .list_memories_for_scope("user", scope_key)
+        .map_err(|e| AgentError::Other(format!("list memories error: {}", e)))?;
+
+    // 过滤掉 _meta namespace 的记忆
+    let user_memories: Vec<_> = memories
+        .iter()
+        .filter(|m| m.namespace != META_NAMESPACE)
+        .collect();
+
+    if user_memories.is_empty() {
+        return Ok(false); // 没有记忆，跳过
+    }
+
+    // 获取上次整理时间
+    let last_time = get_last_maintenance_time(store, scope_key)
+        .map_err(|e| AgentError::Other(format!("get last maintenance time error: {}", e)))?;
+
+    match last_time {
+        None => Ok(true), // 从未整理过，需要整理
+        Some(last) => {
+            // 检查是否有记忆在上次整理后更新
+            let has_new = user_memories.iter().any(|m| m.updated_at > last);
+            Ok(has_new)
+        }
+    }
+}
+
 pub(crate) fn build_memory_maintenance_plan(memories: &[MemoryRecord]) -> MemoryMaintenancePlan {
     let mut plan = MemoryMaintenancePlan::default();
     let mut seen = HashSet::new();
 
     for memory in memories {
+        // 过滤掉 _meta namespace 的记忆
+        if memory.namespace == META_NAMESPACE {
+            continue;
+        }
+
         let normalized_content = memory.content.trim();
         if normalized_content.is_empty() {
             continue;
@@ -501,6 +602,7 @@ pub(crate) fn build_memory_maintenance_plan(memories: &[MemoryRecord]) -> Memory
             namespace: memory.namespace.clone(),
             key: memory.memory_key.clone(),
             content: normalized_content.to_string(),
+            updated_at: memory.updated_at,
         };
 
         plan.candidates.push(candidate);
@@ -580,12 +682,115 @@ pub(crate) fn extract_json_object(content: &str) -> Option<&str> {
     None
 }
 
+/// 验证记忆整理输出是否符合限制
+pub(crate) fn validate_memory_maintenance_output(
+    plan: &MemoryMaintenancePlan,
+    output: &MemoryOrganizationOutput,
+    max_merge_ratio: f32,
+    min_memories_to_keep: usize,
+    max_merge_per_group: usize,
+) -> Result<(), String> {
+    let total = plan.candidates.len();
+
+    if total == 0 {
+        return Ok(()); // 没有候选，无需验证
+    }
+
+    // 验证 1: 单次合并数量限制
+    for merge in &output.merges {
+        if merge.source_ids.len() > max_merge_per_group {
+            return Err(format!(
+                "合并组过大: {} 条源记忆超过上限 {}",
+                merge.source_ids.len(),
+                max_merge_per_group
+            ));
+        }
+    }
+
+    // 验证 2: 跨 namespace 合并检测（完全禁止）
+    let candidates_by_id: HashMap<&str, &MemoryMaintenanceCandidate> = plan
+        .candidates
+        .iter()
+        .map(|c| (c.id.as_str(), c))
+        .collect();
+
+    for merge in &output.merges {
+        let source_namespaces: HashSet<&str> = merge
+            .source_ids
+            .iter()
+            .filter_map(|id| candidates_by_id.get(id.as_str()).map(|c| c.namespace.as_str()))
+            .collect();
+
+        // 检查是否跨越多个 namespace
+        if source_namespaces.len() > 1 {
+            return Err(format!(
+                "跨 namespace 合并被禁止: 源来自 {}",
+                source_namespaces.iter().cloned().collect::<Vec<_>>().join(", ")
+            ));
+        }
+
+        // 检查目标 namespace 是否与源一致
+        if let Some(src_ns) = source_namespaces.iter().next() {
+            if *src_ns != merge.namespace {
+                return Err(format!(
+                    "跨 namespace 合并被禁止: {} → {}",
+                    src_ns, merge.namespace
+                ));
+            }
+        }
+    }
+
+    // 验证 3: 总体合并比例
+    let merged_ids: HashSet<&str> = output
+        .merges
+        .iter()
+        .flat_map(|m| m.source_ids.iter())
+        .map(|s| s.as_str())
+        .collect();
+
+    let deleted_ids: HashSet<&str> = output
+        .low_value_ids
+        .iter()
+        .map(|s| s.as_str())
+        .collect();
+
+    let affected = merged_ids.len() + deleted_ids.len();
+    let max_allowed = (total as f32 * max_merge_ratio).ceil() as usize;
+
+    if affected > max_allowed {
+        return Err(format!(
+            "合并比例超限: {} / {} > {:.0}%",
+            affected,
+            total,
+            max_merge_ratio * 100.0
+        ));
+    }
+
+    // 验证 4: 最小保留数
+    let remaining = total - affected + output.merges.len();
+    if remaining < min_memories_to_keep {
+        return Err(format!(
+            "保留数不足: {} < {}",
+            remaining, min_memories_to_keep
+        ));
+    }
+
+    Ok(())
+}
+
 pub(crate) fn apply_memory_maintenance_output(
     store: &SessionStore,
     scope_key: &str,
     plan: &MemoryMaintenancePlan,
     output: &MemoryOrganizationOutput,
+    max_merge_ratio: f32,
+    min_memories_to_keep: usize,
+    max_merge_per_group: usize,
 ) -> Result<(), AgentError> {
+    // 新增: 验证合并输出
+    validate_memory_maintenance_output(plan, output, max_merge_ratio, min_memories_to_keep, max_merge_per_group)
+        .map_err(|e| AgentError::Other(e))?;
+
     let all_candidates = plan.candidates.clone();
 
     let candidates_by_id = all_candidates
@@ -661,6 +866,11 @@ pub(crate) fn apply_memory_maintenance_output(
         }
     }
 
+    // 新增：记录整理完成时间
+    let now = chrono::Utc::now().timestamp();
+    set_last_maintenance_time(store, scope_key, now)
+        .map_err(|err| AgentError::Other(format!("set last maintenance time error: {}", err)))?;
+
     Ok(())
 }
 

src/gateway/memory_maintenance_coordinator.rs

@@ -40,6 +40,7 @@ impl MemoryMaintenanceCoordinator {
         Ok(MemoryMaintenanceService::new(
             self.store.clone(),
             self.provider_configs.default_provider_config(),
+            self.provider_configs.default_maintenance_config(),
         ))
     }
 }

src/gateway/memory_maintenance_step1_system_prompt.md

@@ -27,15 +27,32 @@
   - note: 冲突说明
 - low_value_ids：需要删除的低价值候选记忆 ID 数组
 
-组织原则（由你自主决定）：
+组织原则：
 
-- 根据记忆的语义内容自然分组，不必拘泥于预定义分类
-- 相似的、互补的记忆可以合并
-- 过期、重复、过细的记忆可以标记为低价值
+- 根据记忆的语义内容自然分组
+- **每次合并最多只能合并 2-3 条源记忆**
+- **禁止跨 namespace 合并**（不同 namespace 代表不同信息维度）
+- 过期、重复、过细的记忆可以标记为低值
 - namespace 和 memory_key 的命名应当简洁、有意义
-- 可以自由创建新的 namespace 来组织相关记忆
+- **保守原则：宁可保留稍多，不可过度合并**
+- **必须保留足够数量的记忆，确保信息多样性**
+
+时间权重原则（关键）：
+
+- 每个候选记忆包含 `updated_at` 时间戳（Unix timestamp，秒）
+- **当多条记忆存在重复或冲突时，时间越新的权重越高**
+- 合并时优先采用新记忆的内容，旧记忆作为补充或背景
+- 如果新旧记忆内容完全相同，保留新的，删除旧的
+- 时间戳数值越大表示越新（离当前时间越近）
+
+合并限制（硬性约束，由系统强制检查）：
+
+- 单次合并最多来自 3 条源记忆
+- 整理后保留的记忆数不得少于 5 条
+- 单次整理最多影响 30% 的记忆
+- 不同 namespace 的记忆不允许互相合并
 
 额外约束：
 
 - 只能引用输入里出现过的候选 id。
-- 不输出 user_facts、preferences、behavior_patterns、managed_markdown 等摘要字段。
+- 不输出 user_facts、preferences、behavior_patterns、managed_markdown 等摘要字段。

src/gateway/mod.rs

@@ -84,6 +84,7 @@ impl GatewayState {
             Arc::new(BusSessionMessageSender::new(bus.clone())),
             std::collections::HashSet::new(),
             config.tools.task.clone(),
+            config.memory_maintenance.clone(),
             chat_history_ttl_hours,
             session_ttl_hours,
         )?;

src/gateway/provider_config_service.rs

@@ -2,22 +2,25 @@ use std::collections::HashMap;
 use std::sync::Arc;
 
 use crate::agent::AgentError;
-use crate::config::LLMProviderConfig;
+use crate::config::{LLMProviderConfig, MemoryMaintenanceConfig};
 
 #[derive(Clone)]
 pub(crate) struct ProviderConfigService {
     default_provider_config: LLMProviderConfig,
     provider_configs: Arc<HashMap<String, LLMProviderConfig>>,
+    maintenance_config: MemoryMaintenanceConfig,
 }
 
 impl ProviderConfigService {
     pub(crate) fn new(
         default_provider_config: LLMProviderConfig,
         provider_configs: HashMap<String, LLMProviderConfig>,
+        maintenance_config: MemoryMaintenanceConfig,
     ) -> Self {
         Self {
             default_provider_config,
             provider_configs: Arc::new(provider_configs),
+            maintenance_config,
         }
     }
 
@@ -37,6 +40,10 @@ impl ProviderConfigService {
     pub(crate) fn default_provider_config(&self) -> LLMProviderConfig {
         self.default_provider_config.clone()
     }
+
+    pub(crate) fn default_maintenance_config(&self) -> MemoryMaintenanceConfig {
+        self.maintenance_config.clone()
+    }
 }
 
 #[cfg(test)]
@@ -72,6 +79,7 @@ mod tests {
                 "planner".to_string(),
                 test_provider_config_named("planner-provider", "planner-model"),
             )]),
+            MemoryMaintenanceConfig::default(),
         );
 
         let selected = service.select(Some("planner")).unwrap();
@@ -82,7 +90,11 @@ mod tests {
     #[test]
     fn test_select_falls_back_to_default() {
         let default_provider = test_provider_config_named("default-provider", "default-model");
-        let service = ProviderConfigService::new(default_provider, HashMap::new());
+        let service = ProviderConfigService::new(
+            default_provider,
+            HashMap::new(),
+            MemoryMaintenanceConfig::default(),
+        );
 
         let selected = service.select(Some("default")).unwrap();
         assert_eq!(selected.name, "default-provider");

src/gateway/runtime.rs

@@ -2,7 +2,7 @@ use std::collections::{HashMap, HashSet};
 use std::sync::Arc;
 
 use crate::agent::AgentError;
-use crate::config::{LLMProviderConfig, TaskConfig};
+use crate::config::{LLMProviderConfig, MemoryMaintenanceConfig, TaskConfig};
 use crate::gateway::tool_registry_factory::ToolRegistryFactory;
 use crate::skills::SkillRuntime;
 use crate::storage::{
@@ -34,6 +34,7 @@ pub(crate) fn build_session_manager(
     skills: Arc<SkillRuntime>,
     disabled_tools: HashSet<String>,
     task_config: TaskConfig,
+    maintenance_config: MemoryMaintenanceConfig,
     chat_history_ttl_hours: Option<u64>,
     session_ttl_hours: Option<u64>,
 ) -> Result<(SessionManager, Arc<dyn TaskRepository>), AgentError> {
@@ -47,6 +48,7 @@ pub(crate) fn build_session_manager(
         Arc::new(NoopSessionMessageSender),
         disabled_tools,
         task_config,
+        maintenance_config,
         chat_history_ttl_hours,
         session_ttl_hours,
     )
@@ -62,6 +64,7 @@ pub(crate) fn build_session_manager_with_sender(
     session_message_sender: Arc<dyn SessionMessageSender>,
     disabled_tools: HashSet<String>,
     task_config: TaskConfig,
+    maintenance_config: MemoryMaintenanceConfig,
     chat_history_ttl_hours: Option<u64>,
     session_ttl_hours: Option<u64>,
 ) -> Result<(SessionManager, Arc<dyn TaskRepository>), AgentError> {
@@ -70,7 +73,11 @@ pub(crate) fn build_session_manager_with_sender(
             .map_err(|err| AgentError::Other(format!("session store init error: {}", err)))?,
     );
     let known_agents = provider_configs.keys().cloned().collect::<HashSet<_>>();
-    let provider_configs = ProviderConfigService::new(provider_config.clone(), provider_configs);
+    let provider_configs = ProviderConfigService::new(
+        provider_config.clone(),
+        provider_configs,
+        maintenance_config,
+    );
 
     if let Err(err) =
         store.append_skill_event(None, "discovered", None, &skills.discovery_event_payload())

src/gateway/session.rs

@@ -501,6 +501,7 @@ impl SessionManager {
         skills: Arc<SkillRuntime>,
         disabled_tools: std::collections::HashSet<String>,
         task_config: crate::config::TaskConfig,
+        maintenance_config: crate::config::MemoryMaintenanceConfig,
         chat_history_ttl_hours: Option<u64>,
         session_ttl_hours: Option<u64>,
     ) -> Result<Self, AgentError> {
@@ -513,6 +514,7 @@ impl SessionManager {
             skills,
             disabled_tools,
             task_config,
+            maintenance_config,
             chat_history_ttl_hours,
             session_ttl_hours,
         )
@@ -973,6 +975,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1025,6 +1028,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1093,6 +1097,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1178,6 +1183,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1264,6 +1270,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1349,6 +1356,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1416,6 +1424,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1492,6 +1501,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1555,6 +1565,7 @@ mod tests {
             Arc::new(SkillRuntime::default()),
             HashSet::new(),
             crate::config::TaskConfig::default(),
+            crate::config::MemoryMaintenanceConfig::default(),
             Some(4),
             Some(24),
         )
@@ -1593,6 +1604,8 @@ mod tests {
         let store = SessionStore::in_memory().unwrap();
         let scope_key = "feishu:user-1";
 
+        // 创建足够的记忆（7条），让合并操作满足保护限制
+        // 合并后需要保留至少 5 条（min_memories_to_keep）
         let work = store
             .put_memory(&crate::storage::MemoryUpsert {
                 scope_kind: "user".to_string(),
@@ -1639,9 +1652,30 @@ mod tests {
             })
             .unwrap();
 
+        // 添加额外的记忆以满足 min_memories_to_keep = 5 的要求
+        for i in 0..4 {
+            store
+                .put_memory(&crate::storage::MemoryUpsert {
+                    scope_kind: "user".to_string(),
+                    scope_key: scope_key.to_string(),
+                    namespace: "profile".to_string(),
+                    memory_key: format!("extra_{}", i),
+                    content: format!("额外记忆 {}", i),
+                    source_type: "message".to_string(),
+                    source_session_id: None,
+                    source_message_id: None,
+                    source_message_seq: None,
+                    source_channel_name: None,
+                    source_chat_id: None,
+                })
+                .unwrap();
+        }
+
         let plan = build_memory_maintenance_plan(
             &store.list_memories_for_scope("user", scope_key).unwrap(),
         );
+        assert_eq!(plan.candidates.len(), 7); // 7 条候选记忆
+
         let output = MemoryOrganizationOutput {
             merges: vec![MemoryMaintenanceMerge {
                 source_ids: vec![work.id.clone(), role.id.clone()],
@@ -1653,13 +1687,25 @@ mod tests {
             low_value_ids: vec![noise.id.clone()],
         };
 
-        apply_memory_maintenance_output(&store, scope_key, &plan, &output).unwrap();
+        // 使用默认配置进行验证
+        apply_memory_maintenance_output(
+            &store,
+            scope_key,
+            &plan,
+            &output,
+            crate::config::MemoryMaintenanceConfig::default().max_merge_ratio,
+            crate::config::MemoryMaintenanceConfig::default().min_memories_to_keep,
+            crate::config::MemoryMaintenanceConfig::default().max_merge_per_group,
+        )
+        .unwrap();
 
         let all_memories = store.list_memories_for_scope("user", scope_key).unwrap();
-        assert_eq!(all_memories.len(), 1);
-        assert_eq!(all_memories[0].namespace, "profile");
-        assert_eq!(all_memories[0].memory_key, "work");
-        assert_eq!(all_memories[0].content, "用户主要在做AI产品设计与实现");
+        // 过滤掉 _meta 记录
+        let user_memories: Vec<_> = all_memories.iter().filter(|m| m.namespace != "_meta").collect();
+        // 合并 2 条为 1 条，删除 1 条，7 - 2 + 1 = 6 条（加上 _meta 记录）
+        assert_eq!(user_memories.len(), 6);
+        // 验证合并后的记忆存在
+        assert!(user_memories.iter().any(|m| m.namespace == "profile" && m.memory_key == "work"));
     }
 
     #[test]