diff --git a/src/main/main.ts b/src/main/main.ts
index ac2b96b..d138ab1 100644
--- a/src/main/main.ts
+++ b/src/main/main.ts
@@ -194,7 +194,7 @@ app.on('window-all-closed', () => {
   }
 });
 
-app.on('before-quit', () => {
+app.on('before-quit', async () => {
   isQuitting = true;
   // 清理浏览器
   browserClose();
@@ -204,4 +204,25 @@ app.on('before-quit', () => {
   killAllProcesses();
   // 通知渲染进程释放显存
   mainWindow?.webContents.send('app-quit');
+  // 主进程直接调用 Ollama API 释放显存（更可靠，不依赖渲染进程）
+  try {
+    const OLlama_URL = 'http://127.0.0.1:11434';
+    const psResp = await fetch(`${OLlama_URL}/api/ps`);
+    if (psResp.ok) {
+      const psData = await psResp.json() as { models?: Array<{ name: string }> };
+      const models = psData.models || [];
+      for (const m of models) {
+        try {
+          await fetch(`${OLlama_URL}/api/generate`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ model: m.name, keep_alive: 0 }),
+          });
+        } catch { /* 忽略单个模型释放失败 */ }
+      }
+      if (models.length > 0) {
+        console.log(`[before-quit] 已释放 ${models.length} 个模型显存`);
+      }
+    }
+  } catch { /* 释放显存失败不影响退出 */ }
 });
diff --git a/src/renderer/services/tool-registry.ts b/src/renderer/services/tool-registry.ts
index 915b64a..ec3ef6b 100644
--- a/src/renderer/services/tool-registry.ts
+++ b/src/renderer/services/tool-registry.ts
@@ -367,7 +367,7 @@ export const TOOL_DEFINITIONS: ToolDefinition[] = [
 CRITICAL: For add action, you MUST include both "type" (fact/preference/rule) and "content" fields. If you omit them, the call will fail.`,
       parameters: {
         type: 'object',
-        required: ['action'],
+        required: ['action', 'type'],
         properties: {
           action: { type: 'string', enum: ['search', 'add', 'replace', 'remove', 'read_all'], description: 'Which operation to perform.' },
           query: { type: 'string', description: '[search] Keywords to search for.' },