diff --git a/src/renderer/components/memory-panel.ts b/src/renderer/components/memory-panel.ts
index 29468f7..9197f76 100644
--- a/src/renderer/components/memory-panel.ts
+++ b/src/renderer/components/memory-panel.ts
@@ -18,23 +18,9 @@ let panelEl: HTMLElement;
 let isOpen = false;
 
 export function initMemoryPanel(): void {
-  const modelBar = document.querySelector('.model-bar');
-  if (!modelBar) return;
-
-  // 创建记忆状态栏
-  const bar = document.createElement('div');
-  bar.className = 'memory-bar';
-  bar.innerHTML = `
-    <button class="memory-bar-btn" id="btnMemoryPanel" title="Agent 记忆">
-      <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-        <path d="M12 2a7 7 0 0 1 7 7c0 2.38-1.19 4.47-3 5.74V17a1 1 0 0 1-1 1H9a1 1 0 0 1-1-1v-2.26C6.19 13.47 5 11.38 5 9a7 7 0 0 1 7-7z"/>
-        <line x1="9" y1="21" x2="15" y2="21"/>
-      </svg>
-      <span class="memory-bar-label">记忆</span>
-      <span class="memory-bar-count" id="memoryCount">0</span>
-    </button>
-  `;
-  modelBar.after(bar);
+  // 绑定 header 中的记忆按钮
+  const btnMemory = document.querySelector('#btnMemory');
+  if (!btnMemory) return;
 
   // 创建记忆面板
   const panel = document.createElement('div');
@@ -77,7 +63,7 @@ export function initMemoryPanel(): void {
   panelEl = panel;
 
   // 绑定事件
-  bar.querySelector('#btnMemoryPanel')!.addEventListener('click', togglePanel);
+  btnMemory.addEventListener('click', togglePanel);
   panel.querySelector('#btnCloseMemoryPanel')!.addEventListener('click', () => setPanelOpen(false));
 
   const toggleMemory = panel.querySelector('#toggleMemoryPanelEnabled') as HTMLInputElement;
@@ -125,8 +111,8 @@ function setPanelOpen(open: boolean): void {
 
 function updateMemoryCount(): void {
   const count = getMemoryCache().length;
-  const countEl = document.querySelector('#memoryCount');
-  if (countEl) countEl.textContent = String(count);
+  const btn = document.querySelector('#btnMemory');
+  if (btn) btn.setAttribute('title', count > 0 ? `Agent 记忆 (${count})` : 'Agent 记忆');
 }
 
 function renderMemoryList(): void {
diff --git a/src/renderer/index.html b/src/renderer/index.html
index 4a51e18..9d60d19 100644
--- a/src/renderer/index.html
+++ b/src/renderer/index.html
@@ -54,6 +54,12 @@
                     <line x1="8" y1="11" x2="14" y2="11"/>
                 </svg>
             </button>
+            <button class="icon-btn" id="btnMemory" title="Agent 记忆">
+                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <path d="M12 2a7 7 0 0 1 7 7c0 2.38-1.19 4.47-3 5.74V17a1 1 0 0 1-1 1H9a1 1 0 0 1-1-1v-2.26C6.19 13.47 5 11.38 5 9a7 7 0 0 1 7-7z"/>
+                    <line x1="9" y1="21" x2="15" y2="21"/>
+                </svg>
+            </button>
             <button class="icon-btn" id="btnHistory" title="历史记录">
                 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                     <circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/>
diff --git a/src/renderer/services/agent-engine.ts b/src/renderer/services/agent-engine.ts
index d0955b0..bec0f6f 100644
--- a/src/renderer/services/agent-engine.ts
+++ b/src/renderer/services/agent-engine.ts
@@ -26,6 +26,12 @@ const MAX_LOOP_TIME = 300000;        // 5 分钟总超时
 const TOOL_EXEC_TIMEOUT = 30000;     // 工具执行超时 30 秒
 const STREAM_TIMEOUT = 120000;       // 单次流式调用超时 2 分钟
 
+const TOOL_USAGE_GUIDE = `【工具使用规则】
+1. 路径上下文：当用户说"修改这个文件"、"删除它"、"查看里面"等未指定路径时，必须从本次对话中最近的工具调用结果中提取路径。例如用户之前让你读取了 /home/user/project/config.json，后续说"修改配置"就应继续使用该路径，而不是推测新路径。
+2. 工具调用结果中的 path 字段是权威的文件路径，优先使用它。
+3. 如果对话中从未出现过相关路径，应先用 search_files 或 list_directory 定位，不要凭空猜测路径。
+4. 对同一文件的连续操作（读取→修改、读取→删除），路径必须一致。`;
+
 export interface AgentCallbacks {
   onThinking: (text: string) => void;
   onContent: (text: string) => void;
@@ -77,7 +83,9 @@ export async function runAgentLoop(
   }
 
   if (systemPromptParts.length > 0) {
-    messages.push({ role: 'system', content: systemPromptParts.join('\n\n') });
+    messages.push({ role: 'system', content: systemPromptParts.join('\n\n') + '\n\n' + TOOL_USAGE_GUIDE });
+  } else {
+    messages.push({ role: 'system', content: TOOL_USAGE_GUIDE });
   }
 
   for (const msg of historyMessages) {
diff --git a/src/renderer/styles/style.css b/src/renderer/styles/style.css
index acf060c..63c05c4 100644
--- a/src/renderer/styles/style.css
+++ b/src/renderer/styles/style.css
@@ -2421,50 +2421,6 @@ html, body {
    Agent 记忆系统
    ═══════════════════════════════════════════════════════════════ */
 
-/* ── 记忆状态栏 ── */
-.memory-bar {
-    display: flex;
-    align-items: center;
-    padding: 2px 16px;
-    background: rgba(255, 255, 255, 0.02);
-    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
-}
-
-.memory-bar-btn {
-    display: flex;
-    align-items: center;
-    gap: 6px;
-    background: none;
-    border: 1px solid rgba(255, 255, 255, 0.08);
-    border-radius: 16px;
-    padding: 4px 12px;
-    color: var(--text-secondary, rgba(255, 255, 255, 0.6));
-    cursor: pointer;
-    font-size: 12px;
-    transition: all 0.2s;
-}
-
-.memory-bar-btn:hover {
-    background: rgba(255, 255, 255, 0.05);
-    border-color: rgba(0, 245, 212, 0.3);
-    color: var(--text-primary, #fff);
-}
-
-.memory-bar-btn svg {
-    width: 14px;
-    height: 14px;
-}
-
-.memory-bar-count {
-    background: rgba(0, 245, 212, 0.15);
-    color: var(--accent-cyan, #00f5d4);
-    padding: 0 6px;
-    border-radius: 8px;
-    font-size: 11px;
-    min-width: 18px;
-    text-align: center;
-}
-
 /* ── 记忆面板 ── */
 .memory-panel {
     position: absolute;