diff --git a/mateclaw-server/src/main/java/vip/mate/agent/context/RuntimeContextInjector.java b/mateclaw-server/src/main/java/vip/mate/agent/context/RuntimeContextInjector.java
new file mode 100644
index 00000000..42c05f3f
--- /dev/null
+++ b/mateclaw-server/src/main/java/vip/mate/agent/context/RuntimeContextInjector.java
@@ -0,0 +1,30 @@
+package vip.mate.agent.context;
+
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * 运行时上下文注入器 — 在 LLM 消息列表中预注入当前时间等运行时信息。
+ * <p>
+ * 参考 Claude Code 的 prependUserContext 模式：将时间信息作为首条 meta UserMessage 注入，
+ * 而非修改 System Prompt，以保持 prompt cache 命中率。
+ */
+public final class RuntimeContextInjector {
+
+    private static final ZoneId ZONE = ZoneId.of("Asia/Shanghai");
+    private static final DateTimeFormatter DATE_FMT = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+    private static final DateTimeFormatter TIME_FMT = DateTimeFormatter.ofPattern("HH:mm");
+
+    private RuntimeContextInjector() {
+    }
+
+    /**
+     * 构建运行时上下文消息，包含当前日期和时间。
+     */
+    public static String buildContextMessage() {
+        LocalDateTime now = LocalDateTime.now(ZONE);
+        return "[system-context] 当前时间: " + now.format(DATE_FMT)
+                + " " + now.format(TIME_FMT) + " (Asia/Shanghai)";
+    }
+}
diff --git a/mateclaw-server/src/main/java/vip/mate/agent/graph/node/ReasoningNode.java b/mateclaw-server/src/main/java/vip/mate/agent/graph/node/ReasoningNode.java
index b7a8beda..fd93f4bd 100644
--- a/mateclaw-server/src/main/java/vip/mate/agent/graph/node/ReasoningNode.java
+++ b/mateclaw-server/src/main/java/vip/mate/agent/graph/node/ReasoningNode.java
@@ -7,6 +7,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.ai.chat.messages.AssistantMessage;
 import org.springframework.ai.chat.messages.Message;
 import org.springframework.ai.chat.messages.SystemMessage;
+import org.springframework.ai.chat.messages.UserMessage;
 import org.springframework.ai.chat.model.ChatModel;
 import org.springframework.ai.chat.prompt.ChatOptions;
 import org.springframework.ai.chat.prompt.Prompt;
@@ -18,6 +19,7 @@ import vip.mate.agent.AgentToolSet;
 import vip.mate.agent.GraphEventPublisher;
 import vip.mate.agent.graph.NodeStreamingChatHelper;
 import vip.mate.agent.context.ConversationWindowManager;
+import vip.mate.agent.context.RuntimeContextInjector;
 import vip.mate.agent.graph.state.FinishReason;
 import vip.mate.agent.graph.state.MateClawStateAccessor;
 import vip.mate.agent.graph.state.MateClawStateKeys;
@@ -155,6 +157,8 @@ public class ReasoningNode implements NodeAction {
         // 构建 Prompt，附带工具定义但禁用内部工具执行
         List<Message> promptMessages = new ArrayList<>();
         promptMessages.add(new SystemMessage(systemPrompt));
+        // 注入运行时上下文（当前时间），让 LLM 在推理阶段即可感知真实日期
+        promptMessages.add(new UserMessage(RuntimeContextInjector.buildContextMessage()));
         promptMessages.addAll(messages);
 
         ChatOptions options;
diff --git a/mateclaw-server/src/main/java/vip/mate/agent/graph/plan/node/PlanGenerationNode.java b/mateclaw-server/src/main/java/vip/mate/agent/graph/plan/node/PlanGenerationNode.java
index 4f7f9a6d..848ce088 100644
--- a/mateclaw-server/src/main/java/vip/mate/agent/graph/plan/node/PlanGenerationNode.java
+++ b/mateclaw-server/src/main/java/vip/mate/agent/graph/plan/node/PlanGenerationNode.java
@@ -16,6 +16,7 @@ import vip.mate.agent.graph.plan.state.PlanStateAccessor;
 import vip.mate.agent.graph.plan.state.PlanStateKeys;
 import vip.mate.agent.graph.state.MateClawStateKeys;
 import vip.mate.agent.context.ConversationWindowManager;
+import vip.mate.agent.context.RuntimeContextInjector;
 import vip.mate.planning.service.PlanningService;
 
 import java.util.ArrayList;
@@ -125,6 +126,8 @@ public class PlanGenerationNode implements NodeAction {
             // 构建 prompt 消息列表：system + 历史上下文 + 当前规划请求
             List<Message> promptMessages = new ArrayList<>();
             promptMessages.add(new SystemMessage(systemPrompt + "\n\n" + PLANNING_PROMPT));
+            // 注入运行时上下文（当前时间）
+            promptMessages.add(new UserMessage(RuntimeContextInjector.buildContextMessage()));
 
             // 注入 working context（对话历史摘要），让规划能感知之前对话的约束和补充条件
             String workingContext = accessor.workingContext();
diff --git a/mateclaw-server/src/main/java/vip/mate/agent/graph/plan/node/StepExecutionNode.java b/mateclaw-server/src/main/java/vip/mate/agent/graph/plan/node/StepExecutionNode.java
index 17d7e2e9..b775d3f0 100644
--- a/mateclaw-server/src/main/java/vip/mate/agent/graph/plan/node/StepExecutionNode.java
+++ b/mateclaw-server/src/main/java/vip/mate/agent/graph/plan/node/StepExecutionNode.java
@@ -23,6 +23,7 @@ import vip.mate.agent.graph.plan.state.PlanStateAccessor;
 import vip.mate.agent.graph.plan.state.PlanStateKeys;
 import vip.mate.agent.graph.state.MateClawStateKeys;
 import vip.mate.agent.context.ConversationWindowManager;
+import vip.mate.agent.context.RuntimeContextInjector;
 import vip.mate.agent.graph.executor.ToolExecutionExecutor;
 import vip.mate.channel.web.ChatStreamTracker;
 import vip.mate.planning.service.PlanningService;
@@ -304,6 +305,8 @@ public class StepExecutionNode implements NodeAction {
                 8. 每一步最多做一个必要的检查和一个必要的执行，不要无意义循环。
                 """;
         messages.add(new SystemMessage(enhancedSystemPrompt));
+        // 注入运行时上下文（当前时间）
+        messages.add(new UserMessage(RuntimeContextInjector.buildContextMessage()));
 
         // Layer 2: Working context（对话历史 + 步骤结果的受控长度摘要）
         String workingContext = accessor.workingContext();
diff --git a/mateclaw-ui/src/App.vue b/mateclaw-ui/src/App.vue
index 1027a52c..e208928d 100644
--- a/mateclaw-ui/src/App.vue
+++ b/mateclaw-ui/src/App.vue
@@ -5,7 +5,8 @@
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue'
+import { computed, watchEffect } from 'vue'
+import { useI18n } from 'vue-i18n'
 import en from 'element-plus/es/locale/lang/en'
 import zhCn from 'element-plus/es/locale/lang/zh-cn'
 import { currentLocale } from '@/i18n'
@@ -14,5 +15,11 @@ import { useThemeStore } from '@/stores/useThemeStore'
 // Initialize theme — applies .dark class to <html> immediately
 useThemeStore()
 
+const { t } = useI18n()
+
+watchEffect(() => {
+  document.title = t('app.title')
+})
+
 const elementLocale = computed(() => (currentLocale.value === 'en-US' ? en : zhCn))
 </script>
diff --git a/mateclaw-ui/src/i18n/locales/en-US.ts b/mateclaw-ui/src/i18n/locales/en-US.ts
index 16be5a74..18c73356 100644
--- a/mateclaw-ui/src/i18n/locales/en-US.ts
+++ b/mateclaw-ui/src/i18n/locales/en-US.ts
@@ -1,4 +1,7 @@
 export default {
+  app: {
+    title: 'MateClaw - AI Assistant',
+  },
   common: {
     save: 'Save',
     cancel: 'Cancel',
diff --git a/mateclaw-ui/src/i18n/locales/zh-CN.ts b/mateclaw-ui/src/i18n/locales/zh-CN.ts
index 0127a51f..b89e477c 100644
--- a/mateclaw-ui/src/i18n/locales/zh-CN.ts
+++ b/mateclaw-ui/src/i18n/locales/zh-CN.ts
@@ -1,4 +1,7 @@
 export default {
+  app: {
+    title: 'MateClaw - AI 助手',
+  },
   common: {
     save: '保存',
     cancel: '取消',
diff --git a/mateclaw-ui/src/views/ChatConsole.vue b/mateclaw-ui/src/views/ChatConsole.vue
index ddd578ea..f9ac4a34 100644
--- a/mateclaw-ui/src/views/ChatConsole.vue
+++ b/mateclaw-ui/src/views/ChatConsole.vue
@@ -123,7 +123,7 @@
         :loading="isGenerating"
         :assistant-icon="currentAgent?.icon || '🤖'"
         :user-icon="userInitial"
-        :title="showModelPrompt ? modelPromptTitle : 'MateClaw'"
+        :title="showModelPrompt ? modelPromptTitle : $t('app.title')"
         :subtitle="showModelPrompt ? modelPromptDesc : $t('chat.subtitle')"
         :suggestions="showModelPrompt ? [] : suggestions"
         @regenerate="handleRegenerate"