diff --git a/mateclaw-server/src/main/java/vip/mate/agent/AgentService.java b/mateclaw-server/src/main/java/vip/mate/agent/AgentService.java
index 3b4c886f..b7a95cbd 100644
--- a/mateclaw-server/src/main/java/vip/mate/agent/AgentService.java
+++ b/mateclaw-server/src/main/java/vip/mate/agent/AgentService.java
@@ -215,6 +215,20 @@ public class AgentService {
         agentInstances.remove(agentId);
     }
 
+    /**
+     * Invalidate the cached agent instance whenever one of its workspace files
+     * changes. The system prompt (which embeds MEMORY.md / PROFILE.md / structured
+     * memory) is baked into the cached instance at build time, so memory edits made
+     * via tools, consolidation, or cleanup would otherwise stay invisible until an
+     * agent config change or restart. Rebuilding on the next turn picks them up.
+     */
+    @org.springframework.context.event.EventListener
+    public void onWorkspaceFileChanged(vip.mate.workspace.document.event.WorkspaceFileChangedEvent event) {
+        if (event.agentId() != null) {
+            agentInstances.remove(event.agentId());
+        }
+    }
+
     // ==================== 运行时入口 ====================
 
     public String chat(Long agentId, String message, String conversationId) {
diff --git a/mateclaw-server/src/main/java/vip/mate/workspace/document/WorkspaceFileService.java b/mateclaw-server/src/main/java/vip/mate/workspace/document/WorkspaceFileService.java
index 58b6c4fa..5f900f9d 100644
--- a/mateclaw-server/src/main/java/vip/mate/workspace/document/WorkspaceFileService.java
+++ b/mateclaw-server/src/main/java/vip/mate/workspace/document/WorkspaceFileService.java
@@ -3,8 +3,10 @@ package vip.mate.workspace.document;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import vip.mate.workspace.document.event.WorkspaceFileChangedEvent;
 import vip.mate.workspace.document.model.WorkspaceFileEntity;
 import vip.mate.workspace.document.repository.WorkspaceFileMapper;
 
@@ -31,6 +33,7 @@ import java.util.stream.Collectors;
 public class WorkspaceFileService {
 
     private final WorkspaceFileMapper fileMapper;
+    private final ApplicationEventPublisher eventPublisher;
 
     /**
      * 列出 Agent 的所有工作区文件（按排序 + 文件名排列）
@@ -68,6 +71,7 @@ public class WorkspaceFileService {
             existing.setContent(content);
             existing.setFileSize(size);
             fileMapper.updateById(existing);
+            eventPublisher.publishEvent(new WorkspaceFileChangedEvent(agentId, filename));
             return existing;
         } else {
             WorkspaceFileEntity entity = new WorkspaceFileEntity();
@@ -78,6 +82,7 @@ public class WorkspaceFileService {
             entity.setEnabled(false);
             entity.setSortOrder(0);
             fileMapper.insert(entity);
+            eventPublisher.publishEvent(new WorkspaceFileChangedEvent(agentId, filename));
             return entity;
         }
     }
@@ -91,6 +96,7 @@ public class WorkspaceFileService {
                 new LambdaQueryWrapper<WorkspaceFileEntity>()
                         .eq(WorkspaceFileEntity::getAgentId, agentId)
                         .eq(WorkspaceFileEntity::getFilename, filename));
+        eventPublisher.publishEvent(new WorkspaceFileChangedEvent(agentId, filename));
     }
 
     /**
diff --git a/mateclaw-server/src/main/java/vip/mate/workspace/document/event/WorkspaceFileChangedEvent.java b/mateclaw-server/src/main/java/vip/mate/workspace/document/event/WorkspaceFileChangedEvent.java
new file mode 100644
index 00000000..ddaac410
--- /dev/null
+++ b/mateclaw-server/src/main/java/vip/mate/workspace/document/event/WorkspaceFileChangedEvent.java
@@ -0,0 +1,16 @@
+package vip.mate.workspace.document.event;
+
+/**
+ * Published whenever an agent's workspace file is created, updated, or deleted.
+ * <p>
+ * Workspace files (AGENTS.md, SOUL.md, PROFILE.md, MEMORY.md, structured/*.md)
+ * are baked into the agent's system prompt when its runtime instance is built.
+ * Listeners use this to invalidate the cached agent instance so memory edits
+ * (tool writes, consolidation, cleanup) take effect on the next turn instead of
+ * only after an agent config change or restart.
+ *
+ * @param agentId  the affected agent
+ * @param filename the workspace file that changed
+ */
+public record WorkspaceFileChangedEvent(Long agentId, String filename) {
+}
diff --git a/mateclaw-server/src/test/java/vip/mate/workspace/document/WorkspaceMemorySearchTest.java b/mateclaw-server/src/test/java/vip/mate/workspace/document/WorkspaceMemorySearchTest.java
index 8989778c..bc49eb4c 100644
--- a/mateclaw-server/src/test/java/vip/mate/workspace/document/WorkspaceMemorySearchTest.java
+++ b/mateclaw-server/src/test/java/vip/mate/workspace/document/WorkspaceMemorySearchTest.java
@@ -38,6 +38,7 @@ import static org.mockito.Mockito.when;
 class WorkspaceMemorySearchTest {
 
     @Mock private WorkspaceFileMapper fileMapper;
+    @Mock private org.springframework.context.ApplicationEventPublisher eventPublisher;
     private WorkspaceFileService service;
 
     @BeforeAll
@@ -51,7 +52,21 @@ class WorkspaceMemorySearchTest {
 
     @BeforeEach
     void setUp() {
-        service = new WorkspaceFileService(fileMapper);
+        service = new WorkspaceFileService(fileMapper, eventPublisher);
+    }
+
+    @Test
+    @DisplayName("saveFile publishes a change event so the cached agent instance is invalidated")
+    void saveFilePublishesChangeEvent() {
+        when(fileMapper.selectOne(any())).thenReturn(null); // new file path
+
+        service.saveFile(1000000001L, "MEMORY.md", "## 稳定事实\n- 用户语言：简体中文");
+
+        ArgumentCaptor<vip.mate.workspace.document.event.WorkspaceFileChangedEvent> captor =
+                ArgumentCaptor.forClass(vip.mate.workspace.document.event.WorkspaceFileChangedEvent.class);
+        org.mockito.Mockito.verify(eventPublisher).publishEvent(captor.capture());
+        assertThat(captor.getValue().agentId()).isEqualTo(1000000001L);
+        assertThat(captor.getValue().filename()).isEqualTo("MEMORY.md");
     }
 
     // ---------- tokenize ----------