diff --git a/README.md b/README.md
index 6a97dc9..1278325 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 </p>
 
 <p align="center">
-  <img src="https://img.shields.io/badge/version-0.7.2-blue?style=flat-square" alt="Version" />
+  <img src="https://img.shields.io/badge/version-0.7.3-blue?style=flat-square" alt="Version" />
   <img src="https://img.shields.io/badge/license-MIT-green?style=flat-square" alt="License" />
   <img src="https://img.shields.io/badge/Electron-35-47848F?style=flat-square&logo=electron" alt="Electron" />
   <img src="https://img.shields.io/badge/React-19-61DAFB?style=flat-square&logo=react" alt="React" />
@@ -657,6 +657,11 @@ OLLAMA_BASE_URL=http://localhost:11434
 | `agent.thinkingEnabled` | `true` | 启用 Thinking 推理模式 |
 | `agent.thinkingEffort` | `high` | 推理强度 (low / medium / high / max) |
 | `agent.confirmationTimeoutMs` | `120000` | 确认弹窗超时 (30s ~ 600s) |
+| `agent.enableReflection` | `false` | 反思阶段开关 — 开启后每轮工具执行经过 REFLECTING 状态（失败结果告警，不阻断） |
+| `memory.consolidationEnabled` | `true` | 会话结束记忆固化总开关（v0.7.3 节流策略） |
+| `memory.consolidationMinChars` | `200` | 固化内容门控：回答字符数阈值（或存在成功工具调用） |
+| `memory.consolidationIntervalMs` | `600000` | 固化频率窗口（同会话两次固化的最小间隔） |
+| `mcp.autoReconnect` | `true` | MCP 断连自动重连（指数退避 5s/15s/60s，最多 3 次） |
 | `deepseek.contextWindow` | `1000000` | DeepSeek 上下文窗口 |
 | `agnes.contextWindow` | `1000000` | Agnes 上下文窗口 |
 | `mimo.contextWindow` | `1000000` | MiMo 上下文窗口 |
@@ -873,8 +878,8 @@ npm run lint:fix           # ESLint 自动修复
 npm run format             # Prettier 格式化
 
 # ─── 测试 ─────────────────────────────────
-npm test                   # 运行单元测试 (Vitest, 系统 Node — 473 通过, 34 个 SQLite 依赖用例因 better-sqlite3 ABI 自动跳过)
-npm run test:electron      # 运行全量单元测试 (Electron Node ABI, 507 用例全执行, 含 SQLite 审计链哈希 + 引擎工具链集成)
+npm test                   # 运行单元测试 (Vitest, 系统 Node — SQLite 依赖用例因 better-sqlite3 ABI 自动跳过)
+npm run test:electron      # 运行全量单元测试 (Electron Node ABI, 全部用例执行, 含 SQLite 审计链哈希 + 引擎工具链集成)
 npm run test:watch         # 测试监听模式
 
 # ─── 构建 ─────────────────────────────────
diff --git a/electron/harness/adapters/__tests__/anthropic-cache-control.test.ts b/electron/harness/adapters/__tests__/anthropic-cache-control.test.ts
new file mode 100644
index 0000000..f5e7a92
--- /dev/null
+++ b/electron/harness/adapters/__tests__/anthropic-cache-control.test.ts
@@ -0,0 +1,133 @@
+/**
+ * Anthropic system cache_control 断言测试（v0.7.3 P1-1）
+ *
+ * Anthropic 缓存按"内容块前缀"命中：system 必须以块数组传递并在块上打
+ * cache_control 才可缓存。本文件锁定：
+ * C1 非空 system → 块数组 + {type:'ephemeral'}；
+ * C2 空 system → 保持空字符串（不发空块）；
+ * C3 thinking 模式下断言仍然存在（cache 与 thinking 不互斥）；
+ * C4 system 块文本为四分区完整拼接（roleDefinition/outputConstraints/
+ *    safetyGuidelines/dynamicReminders）。
+ */
+
+import { describe, it, expect, vi, afterEach } from 'vitest';
+
+vi.mock('electron-log', () => ({
+  default: { info: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn() },
+}));
+
+import { AnthropicAdapter } from '../anthropic.adapter';
+import type { MetonaRequest } from '../../types';
+
+function captureFetch(): { bodies: Array<Record<string, unknown>> } {
+  const bodies: Array<Record<string, unknown>> = [];
+  const genericBody = {
+    content: [{ type: 'text', text: 'ok' }],
+    usage: { input_tokens: 3, output_tokens: 2 },
+    stop_reason: 'end_turn',
+  };
+  const fetchMock = vi.fn(async (_url: string | URL, init?: RequestInit) => {
+    bodies.push(JSON.parse(String(init?.body ?? '{}')) as Record<string, unknown>);
+    return new Response(JSON.stringify(genericBody), {
+      status: 200,
+      headers: { 'Content-Type': 'application/json' },
+    });
+  });
+  vi.stubGlobal('fetch', fetchMock);
+  return { bodies };
+}
+
+afterEach(() => {
+  vi.unstubAllGlobals();
+});
+
+function makeAdapter(): AnthropicAdapter {
+  return new AnthropicAdapter({
+    provider: 'anthropic',
+    baseURL: 'http://a.test',
+    apiKey: 'k',
+    defaultModel: 'claude-sonnet-4-5',
+  });
+}
+
+function makeRequest(overrides?: Partial<MetonaRequest>): MetonaRequest {
+  return {
+    meta: {
+      sessionId: 's1',
+      iteration: 1,
+      requestId: 'r1',
+      timestamp: Date.now(),
+      agentVersion: 'test',
+    },
+    systemPrompt: {
+      roleDefinition: 'You are Metona.',
+      outputConstraints: 'Be concise.',
+      safetyGuidelines: 'Stay safe.',
+      dynamicReminders: '## Current Workspace\n`/ws`',
+    },
+    messages: [{ role: 'user', content: 'hi', timestamp: Date.now() }],
+    params: { maxTokens: 63_488, temperature: 0, stream: false },
+    ...overrides,
+  };
+}
+
+describe('AnthropicAdapter — system cache_control（P1-1）', () => {
+  it('C1: 非空 system → 单 text 块 + cache_control ephemeral', async () => {
+    const adapter = makeAdapter();
+    const { bodies } = captureFetch();
+    await adapter.send(makeRequest());
+
+    const system = bodies[0].system as Array<{
+      type: string;
+      text: string;
+      cache_control: { type: string };
+    }>;
+    expect(Array.isArray(system)).toBe(true);
+    expect(system).toHaveLength(1);
+    expect(system[0].type).toBe('text');
+    expect(system[0].cache_control).toEqual({ type: 'ephemeral' });
+  });
+
+  it('C2: 空 system → 保持空字符串（不发空块）', async () => {
+    const adapter = makeAdapter();
+    const { bodies } = captureFetch();
+    await adapter.send(
+      makeRequest({
+        systemPrompt: { roleDefinition: '', outputConstraints: '', safetyGuidelines: '' },
+      }),
+    );
+    expect(bodies[0].system).toBe('');
+  });
+
+  it('C3: thinking 模式下 cache_control 断言仍然存在', async () => {
+    const adapter = makeAdapter();
+    const { bodies } = captureFetch();
+    await adapter.send(
+      makeRequest({
+        params: {
+          maxTokens: 8192,
+          temperature: 0,
+          stream: false,
+          thinkingEnabled: true,
+          thinkingEffort: 'high',
+        },
+      }),
+    );
+    const system = bodies[0].system as Array<{ cache_control: { type: string } }>;
+    expect(system[0].cache_control).toEqual({ type: 'ephemeral' });
+    // thinking 与 cache 共存：thinking 块也在请求体中
+    expect(bodies[0].thinking).toMatchObject({ type: 'enabled' });
+  });
+
+  it('C4: system 块文本为四分区完整拼接', async () => {
+    const adapter = makeAdapter();
+    const { bodies } = captureFetch();
+    await adapter.send(makeRequest());
+
+    const system = bodies[0].system as Array<{ text: string }>;
+    expect(system[0].text).toContain('You are Metona.');
+    expect(system[0].text).toContain('Be concise.');
+    expect(system[0].text).toContain('Stay safe.');
+    expect(system[0].text).toContain('## Current Workspace');
+  });
+});
diff --git a/electron/harness/adapters/__tests__/provider-request-shapes.test.ts b/electron/harness/adapters/__tests__/provider-request-shapes.test.ts
index 7378ce9..a5331db 100644
--- a/electron/harness/adapters/__tests__/provider-request-shapes.test.ts
+++ b/electron/harness/adapters/__tests__/provider-request-shapes.test.ts
@@ -109,29 +109,69 @@ describe('AnthropicAdapter — 请求体契约', () => {
             role: 'assistant',
             content: null,
             toolCalls: [
-              { id: 'tc_1', name: 'read_file', args: { path: 'a.txt' }, iteration: 1, timestamp: Date.now() },
+              {
+                id: 'tc_1',
+                name: 'read_file',
+                args: { path: 'a.txt' },
+                iteration: 1,
+                timestamp: Date.now(),
+              },
             ],
             timestamp: Date.now(),
           },
-          { role: 'tool', content: null, toolResult: { toolCallId: 'tc_1', toolName: 'read_file', result: 'data', success: true, durationMs: 1, timestamp: Date.now() }, timestamp: Date.now() },
+          {
+            role: 'tool',
+            content: null,
+            toolResult: {
+              toolCallId: 'tc_1',
+              toolName: 'read_file',
+              result: 'data',
+              success: true,
+              durationMs: 1,
+              timestamp: Date.now(),
+            },
+            timestamp: Date.now(),
+          },
           // 孤立 tool_result（前面没有对应 tool_use）应被过滤
-          { role: 'tool', content: null, toolResult: { toolCallId: 'tc_orphan', toolName: 'x', result: '', success: true, durationMs: 1, timestamp: Date.now() }, timestamp: Date.now() },
+          {
+            role: 'tool',
+            content: null,
+            toolResult: {
+              toolCallId: 'tc_orphan',
+              toolName: 'x',
+              result: '',
+              success: true,
+              durationMs: 1,
+              timestamp: Date.now(),
+            },
+            timestamp: Date.now(),
+          },
           { role: 'user', content: 'next?', timestamp: Date.now() },
         ],
       }),
     );
 
     const body = bodies[0];
-    expect(body.system).toContain('You are Metona.');
+    // v0.7.3 P1-1: system 转为块数组并打 cache_control 断言（稳定前缀 prompt cache）
+    const system = body.system as Array<{
+      type: string;
+      text: string;
+      cache_control: { type: string };
+    }>;
+    expect(Array.isArray(system)).toBe(true);
+    expect(system[0].text).toContain('You are Metona.');
+    expect(system[0].cache_control).toEqual({ type: 'ephemeral' });
     expect(Array.isArray(body.messages)).toBe(true);
     const msgs = body.messages as Array<{ role: string; content: Array<Record<string, unknown>> }>;
     // tool_use 的 assistant 消息存在且携带 id/name
     const assistantToolMsg = msgs.find((m) => m.role === 'assistant');
-    expect(assistantToolMsg?.content[0]).toMatchObject({ type: 'tool_use', id: 'tc_1', name: 'read_file' });
+    expect(assistantToolMsg?.content[0]).toMatchObject({
+      type: 'tool_use',
+      id: 'tc_1',
+      name: 'read_file',
+    });
     // tool 结果以 user 角色 tool_result 形态出现且配对 id 正确；孤立者被丢弃
-    const toolResultBlocks = msgs.flatMap((m) =>
-      m.content.filter((c) => c.type === 'tool_result'),
-    );
+    const toolResultBlocks = msgs.flatMap((m) => m.content.filter((c) => c.type === 'tool_result'));
     expect(toolResultBlocks).toHaveLength(1);
     expect(toolResultBlocks[0].tool_use_id).toBe('tc_1');
   });
@@ -166,7 +206,15 @@ describe('AnthropicAdapter — 请求体契约', () => {
     });
     const { bodies } = captureFetch();
     await adapter.send(
-      makeRequest({ params: { maxTokens: 1500, temperature: 0, stream: false, thinkingEnabled: true, thinkingEffort: 'low' } }),
+      makeRequest({
+        params: {
+          maxTokens: 1500,
+          temperature: 0,
+          stream: false,
+          thinkingEnabled: true,
+          thinkingEffort: 'low',
+        },
+      }),
     );
     const body = bodies[0];
     const thinking = body.thinking as { type: string; budget_tokens: number };
@@ -185,13 +233,17 @@ describe('AnthropicAdapter — 请求体契约', () => {
     });
     const { bodies } = captureFetch();
     await adapter.send(
-      makeRequest({ params: { maxTokens: 4096, temperature: 0.7, stream: false, thinkingEnabled: true } }),
+      makeRequest({
+        params: { maxTokens: 4096, temperature: 0.7, stream: false, thinkingEnabled: true },
+      }),
     );
     expect(bodies[0].temperature).toBeUndefined();
     expect(bodies[0].thinking).toBeDefined();
 
     await adapter.send(
-      makeRequest({ params: { maxTokens: 4096, temperature: 0.7, stream: false, thinkingEnabled: false } }),
+      makeRequest({
+        params: { maxTokens: 4096, temperature: 0.7, stream: false, thinkingEnabled: false },
+      }),
     );
     expect(bodies[1].temperature).toBe(0.7);
     expect(bodies[1].thinking).toBeUndefined();
@@ -236,13 +288,37 @@ describe('OllamaAdapter — 请求体契约', () => {
     const adapter = makeOllama();
     const { bodies } = captureFetch();
 
-    await adapter.send(makeRequest({ params: { maxTokens: 4096, temperature: 0, stream: false, thinkingEnabled: true, thinkingEffort: 'low' } }));
+    await adapter.send(
+      makeRequest({
+        params: {
+          maxTokens: 4096,
+          temperature: 0,
+          stream: false,
+          thinkingEnabled: true,
+          thinkingEffort: 'low',
+        },
+      }),
+    );
     expect(bodies[0].think).toBe('low');
 
-    await adapter.send(makeRequest({ params: { maxTokens: 4096, temperature: 0, stream: false, thinkingEnabled: true, thinkingEffort: 'max' } }));
+    await adapter.send(
+      makeRequest({
+        params: {
+          maxTokens: 4096,
+          temperature: 0,
+          stream: false,
+          thinkingEnabled: true,
+          thinkingEffort: 'max',
+        },
+      }),
+    );
     expect(bodies[1].think).toBe(true);
 
-    await adapter.send(makeRequest({ params: { maxTokens: 4096, temperature: 0, stream: false, thinkingEnabled: false } }));
+    await adapter.send(
+      makeRequest({
+        params: { maxTokens: 4096, temperature: 0, stream: false, thinkingEnabled: false },
+      }),
+    );
     expect(bodies[2].think).toBeUndefined();
   });
 
@@ -319,12 +395,26 @@ describe('AgnesAdapter — 思考模式对称性（v0.6.4）', () => {
     });
     const { bodies } = captureFetch();
 
-    await adapter.send(makeRequest({ params: { maxTokens: 4096, temperature: 0, stream: false, thinkingEnabled: true, thinkingEffort: 'high' } }));
+    await adapter.send(
+      makeRequest({
+        params: {
+          maxTokens: 4096,
+          temperature: 0,
+          stream: false,
+          thinkingEnabled: true,
+          thinkingEffort: 'high',
+        },
+      }),
+    );
     expect(
       ((bodies[0].chat_template_kwargs as Record<string, unknown>) ?? {}).enable_thinking,
     ).toBe(true);
 
-    await adapter.send(makeRequest({ params: { maxTokens: 4096, temperature: 0, stream: false, thinkingEnabled: false } }));
+    await adapter.send(
+      makeRequest({
+        params: { maxTokens: 4096, temperature: 0, stream: false, thinkingEnabled: false },
+      }),
+    );
     expect(
       ((bodies[1].chat_template_kwargs as Record<string, unknown>) ?? {}).enable_thinking,
     ).toBe(false);
diff --git a/electron/harness/adapters/anthropic.adapter.ts b/electron/harness/adapters/anthropic.adapter.ts
index f7a20a5..8bc3d68 100644
--- a/electron/harness/adapters/anthropic.adapter.ts
+++ b/electron/harness/adapters/anthropic.adapter.ts
@@ -248,8 +248,7 @@ export class AnthropicAdapter extends BaseAdapter {
               usage: {
                 inputTokens: messageStartInputTokens,
                 outputTokens: (usage.output_tokens as number) ?? 0,
-                totalTokens:
-                  messageStartInputTokens + ((usage.output_tokens as number) ?? 0),
+                totalTokens: messageStartInputTokens + ((usage.output_tokens as number) ?? 0),
                 // v0.6.4: 补采 Anthropic 自己的缓存字段（其他 provider 均已采集，
                 // cache_read/creation_input_tokens 与 output_tokens 同在 usage 内）
                 cacheHitTokens: (usage.cache_read_input_tokens as number) ?? undefined,
@@ -343,10 +342,7 @@ export class AnthropicAdapter extends BaseAdapter {
           try {
             args = block.argsBuffer ? JSON.parse(block.argsBuffer) : {};
           } catch (err) {
-            args = truncatedArgumentsPayload(
-              (err as Error).message,
-              block.argsBuffer.slice(-120),
-            );
+            args = truncatedArgumentsPayload((err as Error).message, block.argsBuffer.slice(-120));
           }
           yield {
             type: MetonaStreamEventType.TOOL_CALL_COMPLETE,
@@ -506,11 +502,22 @@ export class AnthropicAdapter extends BaseAdapter {
     const body: Record<string, unknown> = {
       model: this.config.defaultModel,
       max_tokens: maxTokensForRequest,
-      system,
       messages: merged,
       stream,
     };
 
+    // v0.7.3 P1-1: system 稳定前缀打 prompt cache 断言。
+    // Anthropic 缓存按"内容块前缀"命中 —— system 以字符串传递时无法附加
+    // cache_control，必须转为块数组并在最后一个块上打 {type:'ephemeral'}。
+    // 缓存前缀覆盖 tools + system（请求组装顺序 tools 在前）：system 稳定后，
+    // 多轮对话/多轮迭代复用同一前缀，输入 token 计费按缓存读价（约 1/10）。
+    // 前缀稳定性由 P1-1 保证：易变内容（日期/记忆/附件提示）已迁入用户消息。
+    if (system) {
+      body.system = [{ type: 'text', text: system, cache_control: { type: 'ephemeral' } }];
+    } else {
+      body.system = system;
+    }
+
     // 工具定义（input_schema 命名）
     if (request.tools?.length) {
       body.tools = request.tools.map((t) => ({
diff --git a/electron/harness/adapters/ollama.adapter.ts b/electron/harness/adapters/ollama.adapter.ts
index d5b17cc..b31f5fe 100644
--- a/electron/harness/adapters/ollama.adapter.ts
+++ b/electron/harness/adapters/ollama.adapter.ts
@@ -59,17 +59,21 @@ export class OllamaAdapter extends BaseAdapter {
     const nativeRequest = await this.toNativeRequest(request);
 
     // #24 修复: 使用 fetchWithTimeout 替代 getFetchSignal + fetch，确保 timer 清理
-    const response = await this.fetchWithTimeout(`${this.baseURL}/api/chat`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ ...nativeRequest, stream: false }),
-    }, this.config.timeoutMs ?? 300_000);
+    const response = await this.fetchWithTimeout(
+      `${this.baseURL}/api/chat`,
+      {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ ...nativeRequest, stream: false }),
+      },
+      this.config.timeoutMs ?? 300_000,
+    );
 
     if (!response.ok) {
       await this.throwHttpError(response, 'Ollama API error');
     }
 
-    const data = await response.json() as Record<string, unknown>;
+    const data = (await response.json()) as Record<string, unknown>;
     return this.toMetonaResponse(data, request.meta.requestId, request.meta.iteration);
   }
 
@@ -79,11 +83,15 @@ export class OllamaAdapter extends BaseAdapter {
     const nativeRequest = await this.toNativeRequest(request);
 
     // #24 修复: 使用 fetchWithTimeout 替代 getFetchSignal + fetch，确保 timer 清理
-    const response = await this.fetchWithTimeout(`${this.baseURL}/api/chat`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ ...nativeRequest, stream: true }),
-    }, this.config.timeoutMs ?? 300_000);
+    const response = await this.fetchWithTimeout(
+      `${this.baseURL}/api/chat`,
+      {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ ...nativeRequest, stream: true }),
+      },
+      this.config.timeoutMs ?? 300_000,
+    );
 
     if (!response.ok || !response.body) {
       await this.throwHttpError(response, 'Ollama stream error');
@@ -209,7 +217,10 @@ export class OllamaAdapter extends BaseAdapter {
           }
         } catch (parseErr) {
           // P2-8 修复: 与 sse-stream.ts 一致，记录解析失败行便于诊断
-          log.warn(`[Ollama] Failed to parse NDJSON line: ${(parseErr as Error).message}`, trimmed.slice(0, 200));
+          log.warn(
+            `[Ollama] Failed to parse NDJSON line: ${(parseErr as Error).message}`,
+            trimmed.slice(0, 200),
+          );
         }
       }
     }
@@ -239,7 +250,13 @@ export class OllamaAdapter extends BaseAdapter {
     format?: string | object;
     images?: string[];
     options?: Record<string, unknown>;
-  }): Promise<{ response: string; thinking?: string; done: boolean; totalDuration: number; evalCount: number }> {
+  }): Promise<{
+    response: string;
+    thinking?: string;
+    done: boolean;
+    totalDuration: number;
+    evalCount: number;
+  }> {
     const response = await fetch(`${this.baseURL}/api/generate`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
@@ -248,9 +265,12 @@ export class OllamaAdapter extends BaseAdapter {
     });
 
     if (!response.ok) throw new Error(`Ollama generate error: ${response.status}`);
-    const data = await response.json() as {
-      response?: string; thinking?: string; done?: boolean;
-      total_duration?: number; eval_count?: number;
+    const data = (await response.json()) as {
+      response?: string;
+      thinking?: string;
+      done?: boolean;
+      total_duration?: number;
+      eval_count?: number;
     };
 
     return {
@@ -277,7 +297,7 @@ export class OllamaAdapter extends BaseAdapter {
     });
 
     if (!response.ok) throw new Error(`Ollama embed error: ${response.status}`);
-    const data = await response.json() as { embeddings?: number[][]; total_duration?: number };
+    const data = (await response.json()) as { embeddings?: number[][]; total_duration?: number };
 
     return {
       embeddings: data.embeddings ?? [],
@@ -299,7 +319,7 @@ export class OllamaAdapter extends BaseAdapter {
         signal: AbortSignal.timeout(10_000),
       });
       if (response.ok) {
-        const data = await response.json() as {
+        const data = (await response.json()) as {
           models?: Array<{
             name: string;
             size?: number;
@@ -309,6 +329,8 @@ export class OllamaAdapter extends BaseAdapter {
         if (data.models?.length) {
           // v0.6.4 P4-1: 能力标志改为逐模型 /api/show 实测探测；单个探测失败
           // 该模型回退保守 true（不可用时行为与旧实现一致，fail-open 保可用性）
+          // v0.7.3 P1-4: supportsVision 随探测结果透出（undefined = 未知 → 前端保守放行），
+          // 供上传入口拒绝不支持图片的本地语言模型
           const enriched = await Promise.all(
             data.models.map(async (m) => {
               const caps = await this.probeCapabilities(m.name);
@@ -319,6 +341,7 @@ export class OllamaAdapter extends BaseAdapter {
                 contextWindow: OllamaAdapter.DEFAULT_CONTEXT_WINDOW,
                 supportsToolCalling: caps ? caps.supportsTools : true,
                 supportsThinking: caps ? caps.supportsThinking : true,
+                supportsVision: caps ? caps.supportsVision : undefined,
                 description: m.details
                   ? `${m.details.family ?? 'unknown'} / ${m.details.parameter_size ?? '?'} / ${m.details.quantization_level ?? '?'}`
                   : undefined,
@@ -403,7 +426,9 @@ export class OllamaAdapter extends BaseAdapter {
 
   // ===== POST /api/show =====
 
-  async showModel(model: string): Promise<{ parameters: string; template: string; capabilities: string[] } | null> {
+  async showModel(
+    model: string,
+  ): Promise<{ parameters: string; template: string; capabilities: string[] } | null> {
     try {
       const response = await fetch(`${this.baseURL}/api/show`, {
         method: 'POST',
@@ -412,7 +437,11 @@ export class OllamaAdapter extends BaseAdapter {
         signal: AbortSignal.timeout(10_000),
       });
       if (!response.ok) return null;
-      const data = await response.json() as { parameters?: string; template?: string; capabilities?: string[] };
+      const data = (await response.json()) as {
+        parameters?: string;
+        template?: string;
+        capabilities?: string[];
+      };
       return {
         parameters: data.parameters ?? '',
         template: data.template ?? '',
@@ -470,13 +499,22 @@ export class OllamaAdapter extends BaseAdapter {
 
   // ===== GET /api/ps =====
 
-  async listRunning(): Promise<Array<{ name: string; size: number; sizeVram: number; contextLength: number }>> {
+  async listRunning(): Promise<
+    Array<{ name: string; size: number; sizeVram: number; contextLength: number }>
+  > {
     try {
       const response = await fetch(`${this.baseURL}/api/ps`, {
         signal: AbortSignal.timeout(10_000),
       });
       if (!response.ok) return [];
-      const data = await response.json() as { models?: Array<{ name: string; size?: number; size_vram?: number; context_length?: number }> };
+      const data = (await response.json()) as {
+        models?: Array<{
+          name: string;
+          size?: number;
+          size_vram?: number;
+          context_length?: number;
+        }>;
+      };
       return (data.models ?? []).map((m) => ({
         name: m.name ?? '',
         size: m.size ?? 0,
@@ -496,7 +534,7 @@ export class OllamaAdapter extends BaseAdapter {
         signal: AbortSignal.timeout(5_000),
       });
       if (!response.ok) return 'unknown';
-      const data = await response.json() as { version?: string };
+      const data = (await response.json()) as { version?: string };
       return data.version ?? 'unknown';
     } catch {
       return 'unknown';
@@ -525,7 +563,9 @@ export class OllamaAdapter extends BaseAdapter {
       const buf = Buffer.from(await res.arrayBuffer());
       return buf.toString('base64');
     } catch (error) {
-      log.warn(`[Ollama] Failed to download image ${url.slice(0, 100)}: ${(error as Error).message}`);
+      log.warn(
+        `[Ollama] Failed to download image ${url.slice(0, 100)}: ${(error as Error).message}`,
+      );
       return '';
     }
   }
@@ -539,58 +579,60 @@ export class OllamaAdapter extends BaseAdapter {
           request.systemPrompt.outputConstraints,
           request.systemPrompt.safetyGuidelines,
           request.systemPrompt.dynamicReminders,
-        ].filter(Boolean).join('\n\n'),
+        ]
+          .filter(Boolean)
+          .join('\n\n'),
       },
     ];
 
     // #2 修复: 改为 for 循环以支持 async 图片下载（map 回调无法 await）
     for (const m of request.messages) {
       if (m.role === 'system') continue;
-        // C-6 修复: Ollama API 不支持 null content，assistant 仅有 tool_calls 时转为空字符串
-        const msg: Record<string, unknown> = { role: m.role, content: m.content ?? '' };
-        // Ollama 图片使用 images 字段（纯 base64 数组，不含 data: 前缀）
-        if (m.images?.length) {
-          // #2 修复: 支持公网 URL 图片，下载后转为纯 base64
-          // 之前直接将 URL 字符串传给 Ollama，导致 base64 解码错误
-          const resolvedImages: string[] = [];
-          for (const img of m.images) {
-            const url = img.url;
-            if (url.startsWith('data:')) {
-              // data:image/png;base64,iVBOR... → iVBOR...
-              const base64Part = url.split(',')[1];
-              resolvedImages.push(base64Part ?? url);
-            } else if (url.startsWith('http://') || url.startsWith('https://')) {
-              // #2 修复: 公网 URL → 下载 → 纯 base64
-              const base64 = await this.resolveImageToBase64(url);
-              if (base64) resolvedImages.push(base64);
-            } else {
-              // 已是纯 base64 字符串（无 data: 前缀）
-              resolvedImages.push(url);
-            }
+      // C-6 修复: Ollama API 不支持 null content，assistant 仅有 tool_calls 时转为空字符串
+      const msg: Record<string, unknown> = { role: m.role, content: m.content ?? '' };
+      // Ollama 图片使用 images 字段（纯 base64 数组，不含 data: 前缀）
+      if (m.images?.length) {
+        // #2 修复: 支持公网 URL 图片，下载后转为纯 base64
+        // 之前直接将 URL 字符串传给 Ollama，导致 base64 解码错误
+        const resolvedImages: string[] = [];
+        for (const img of m.images) {
+          const url = img.url;
+          if (url.startsWith('data:')) {
+            // data:image/png;base64,iVBOR... → iVBOR...
+            const base64Part = url.split(',')[1];
+            resolvedImages.push(base64Part ?? url);
+          } else if (url.startsWith('http://') || url.startsWith('https://')) {
+            // #2 修复: 公网 URL → 下载 → 纯 base64
+            const base64 = await this.resolveImageToBase64(url);
+            if (base64) resolvedImages.push(base64);
+          } else {
+            // 已是纯 base64 字符串（无 data: 前缀）
+            resolvedImages.push(url);
           }
-          msg.images = resolvedImages;
         }
-        // 工具结果
-        if (m.role === 'tool' && m.toolResult) {
-          msg.tool_call_id = m.toolResult.toolCallId;
-          // CE-2 修复: 工具失败时 result 为 null，优先用 error 字段作为 content
-          msg.content = m.toolResult.error
-            ? m.toolResult.error
-            : (typeof m.toolResult.result === 'string'
-              ? m.toolResult.result
-              : JSON.stringify(m.toolResult.result));
-        }
-        // assistant 工具调用（Ollama REST API 要求 arguments 为 JSON 字符串）
-        if (m.role === 'assistant' && m.toolCalls?.length) {
-          msg.tool_calls = m.toolCalls.map((tc) => ({
-            function: { name: tc.name, arguments: JSON.stringify(tc.args) },
-          }));
-        }
-        // 推理内容回传（保持多轮推理链完整）
-        if (m.role === 'assistant' && m.reasoningContent) {
-          (msg as Record<string, unknown>).reasoning_content = m.reasoningContent;
-        }
-        messages.push(msg);
+        msg.images = resolvedImages;
+      }
+      // 工具结果
+      if (m.role === 'tool' && m.toolResult) {
+        msg.tool_call_id = m.toolResult.toolCallId;
+        // CE-2 修复: 工具失败时 result 为 null，优先用 error 字段作为 content
+        msg.content = m.toolResult.error
+          ? m.toolResult.error
+          : typeof m.toolResult.result === 'string'
+            ? m.toolResult.result
+            : JSON.stringify(m.toolResult.result);
+      }
+      // assistant 工具调用（Ollama REST API 要求 arguments 为 JSON 字符串）
+      if (m.role === 'assistant' && m.toolCalls?.length) {
+        msg.tool_calls = m.toolCalls.map((tc) => ({
+          function: { name: tc.name, arguments: JSON.stringify(tc.args) },
+        }));
+      }
+      // 推理内容回传（保持多轮推理链完整）
+      if (m.role === 'assistant' && m.reasoningContent) {
+        (msg as Record<string, unknown>).reasoning_content = m.reasoningContent;
+      }
+      messages.push(msg);
     }
 
     const body: Record<string, unknown> = {
@@ -619,14 +661,23 @@ export class OllamaAdapter extends BaseAdapter {
 
     // Thinking 模式
     if (request.params.thinkingEnabled) {
-      const effortMap: Record<string, string | boolean> = { low: 'low', medium: 'medium', high: 'high', max: true };
+      const effortMap: Record<string, string | boolean> = {
+        low: 'low',
+        medium: 'medium',
+        high: 'high',
+        max: true,
+      };
       body.think = effortMap[request.params.thinkingEffort ?? 'high'] ?? true;
     }
 
     return body;
   }
 
-  private toMetonaResponse(data: Record<string, unknown>, requestId: string, iteration: number = 0): MetonaResponse {
+  private toMetonaResponse(
+    data: Record<string, unknown>,
+    requestId: string,
+    iteration: number = 0,
+  ): MetonaResponse {
     const message = data.message as Record<string, unknown> | undefined;
     const toolCalls = message?.tool_calls as Array<Record<string, unknown>> | undefined;
     return {
@@ -638,11 +689,14 @@ export class OllamaAdapter extends BaseAdapter {
         timestamp: Date.now(),
         perfStats: {
           loadDurationMs: data.load_duration ? (data.load_duration as number) / 1e6 : undefined,
-          promptEvalDurationMs: data.prompt_eval_duration ? (data.prompt_eval_duration as number) / 1e6 : undefined,
-          evalDurationMs: data.eval_duration ? (data.eval_duration as number) / 1e6 : undefined,
-          tokensPerSecond: data.eval_count && data.eval_duration
-            ? ((data.eval_count as number) / ((data.eval_duration as number) / 1e9))
+          promptEvalDurationMs: data.prompt_eval_duration
+            ? (data.prompt_eval_duration as number) / 1e6
             : undefined,
+          evalDurationMs: data.eval_duration ? (data.eval_duration as number) / 1e6 : undefined,
+          tokensPerSecond:
+            data.eval_count && data.eval_duration
+              ? (data.eval_count as number) / ((data.eval_duration as number) / 1e9)
+              : undefined,
         },
       },
       content: (message?.content as string) ?? '',
@@ -652,7 +706,10 @@ export class OllamaAdapter extends BaseAdapter {
         const rawArgs = fn?.arguments;
         let args: Record<string, unknown> = {};
         try {
-          args = typeof rawArgs === 'string' ? JSON.parse(rawArgs) : (rawArgs as Record<string, unknown>) ?? {};
+          args =
+            typeof rawArgs === 'string'
+              ? JSON.parse(rawArgs)
+              : ((rawArgs as Record<string, unknown>) ?? {});
         } catch (parseErr) {
           // v0.6.4: 非流式路径截断自愈对齐 —— 原 catch 静默降级 {}，与流式修复后的
           // 行为不一致。统一转为 _truncatedArguments 错误参数。
@@ -677,7 +734,10 @@ export class OllamaAdapter extends BaseAdapter {
         outputTokens: (data.eval_count as number) ?? 0,
         totalTokens: ((data.prompt_eval_count as number) ?? 0) + ((data.eval_count as number) ?? 0),
       },
-      finishReason: mapOllamaDoneReason(data.done_reason as string | undefined, !!message?.tool_calls),
+      finishReason: mapOllamaDoneReason(
+        data.done_reason as string | undefined,
+        !!message?.tool_calls,
+      ),
     };
   }
 }
@@ -693,10 +753,15 @@ function mapOllamaDoneReason(
 ): MetonaFinishReason {
   if (hasToolCalls) return MetonaFinishReason.TOOL_CALLS;
   switch (reason) {
-    case 'stop': return MetonaFinishReason.STOP;
-    case 'length': return MetonaFinishReason.LENGTH;
-    case 'load': return MetonaFinishReason.STOP;   // 冷启动加载完成，非错误
-    case 'unload': return MetonaFinishReason.STOP;
-    default: return MetonaFinishReason.STOP;
+    case 'stop':
+      return MetonaFinishReason.STOP;
+    case 'length':
+      return MetonaFinishReason.LENGTH;
+    case 'load':
+      return MetonaFinishReason.STOP; // 冷启动加载完成，非错误
+    case 'unload':
+      return MetonaFinishReason.STOP;
+    default:
+      return MetonaFinishReason.STOP;
   }
 }
diff --git a/electron/harness/agent-loop/__tests__/engine.test.ts b/electron/harness/agent-loop/__tests__/engine.test.ts
index 9f9aa43..1aec24e 100644
--- a/electron/harness/agent-loop/__tests__/engine.test.ts
+++ b/electron/harness/agent-loop/__tests__/engine.test.ts
@@ -15,7 +15,10 @@ import type { IMetonaProviderAdapter, MetonaResponse, MetonaStreamEvent } from '
 import { MetonaStreamEventType } from '../../types';
 
 /** 构造 Mock Adapter：sendStream 按脚本产出事件 */
-function createMockAdapter(scripts: MetonaStreamEvent[][], opts?: { failWith?: Error }): IMetonaProviderAdapter {
+function createMockAdapter(
+  scripts: MetonaStreamEvent[][],
+  opts?: { failWith?: Error },
+): IMetonaProviderAdapter {
   let call = 0;
   return {
     providerId: 'mock',
@@ -23,12 +26,20 @@ function createMockAdapter(scripts: MetonaStreamEvent[][], opts?: { failWith?: E
     supportsToolCalling: true,
     supportsThinking: false,
     getContextWindow: () => 1_000_000,
-    send: vi.fn(async (): Promise<MetonaResponse> => ({
-      meta: { requestId: 'r_test', provider: 'mock', model: 'mock-model', latencyMs: 1, timestamp: Date.now() },
-      content: 'ok',
-      usage: { inputTokens: 10, outputTokens: 5, totalTokens: 15 },
-      finishReason: 'stop' as never,
-    })),
+    send: vi.fn(
+      async (): Promise<MetonaResponse> => ({
+        meta: {
+          requestId: 'r_test',
+          provider: 'mock',
+          model: 'mock-model',
+          latencyMs: 1,
+          timestamp: Date.now(),
+        },
+        content: 'ok',
+        usage: { inputTokens: 10, outputTokens: 5, totalTokens: 15 },
+        finishReason: 'stop' as never,
+      }),
+    ),
     sendStream: vi.fn(async function* (): AsyncIterable<MetonaStreamEvent> {
       if (opts?.failWith) throw opts.failWith;
       const script = scripts[call % scripts.length];
@@ -42,8 +53,23 @@ function createMockAdapter(scripts: MetonaStreamEvent[][], opts?: { failWith?: E
 
 function textDoneEvent(text: string): MetonaStreamEvent[] {
   return [
-    { type: MetonaStreamEventType.TEXT_DELTA, requestId: 'r1', sessionId: 's1', iteration: 1, seq: 0, timestamp: Date.now(), delta: text },
-    { type: MetonaStreamEventType.DONE, requestId: 'r1', sessionId: 's1', iteration: 1, seq: 1, timestamp: Date.now() },
+    {
+      type: MetonaStreamEventType.TEXT_DELTA,
+      requestId: 'r1',
+      sessionId: 's1',
+      iteration: 1,
+      seq: 0,
+      timestamp: Date.now(),
+      delta: text,
+    },
+    {
+      type: MetonaStreamEventType.DONE,
+      requestId: 'r1',
+      sessionId: 's1',
+      iteration: 1,
+      seq: 1,
+      timestamp: Date.now(),
+    },
   ];
 }
 
@@ -51,10 +77,21 @@ function toolCallEvent(name: string, args: Record<string, unknown>): MetonaStrea
   return [
     {
       type: MetonaStreamEventType.TOOL_CALL_COMPLETE,
-      requestId: 'r1', sessionId: 's1', iteration: 1, seq: 0, timestamp: Date.now(),
+      requestId: 'r1',
+      sessionId: 's1',
+      iteration: 1,
+      seq: 0,
+      timestamp: Date.now(),
       toolCall: { id: 'tc_test', name, args, iteration: 1, timestamp: Date.now() },
     },
-    { type: MetonaStreamEventType.DONE, requestId: 'r1', sessionId: 's1', iteration: 1, seq: 1, timestamp: Date.now() },
+    {
+      type: MetonaStreamEventType.DONE,
+      requestId: 'r1',
+      sessionId: 's1',
+      iteration: 1,
+      seq: 1,
+      timestamp: Date.now(),
+    },
   ];
 }
 
@@ -121,7 +158,9 @@ describe('AgentLoopEngine', () => {
   });
 
   it('不可重试错误直接 ERROR（无 fallback 时）', async () => {
-    const adapter = createMockAdapter([], { failWith: Object.assign(new Error('401 unauthorized'), { status: 401 }) });
+    const adapter = createMockAdapter([], {
+      failWith: Object.assign(new Error('401 unauthorized'), { status: 401 }),
+    });
     const engine = new AgentLoopEngine({ retryCount: 0 }, adapter);
     const output = await engine.runStream(userMessage, 's1', [], systemPrompt);
     expect(output.terminationReason).toBe(TerminationReason.ERROR);
@@ -129,7 +168,9 @@ describe('AgentLoopEngine', () => {
 
   it('P1 故障转移：主 Provider 失败后切换到 fallback Provider', async () => {
     // 主 adapter 每次都失败（401 不可重试）
-    const primary = createMockAdapter([], { failWith: Object.assign(new Error('401 invalid key'), { status: 401 }) });
+    const primary = createMockAdapter([], {
+      failWith: Object.assign(new Error('401 invalid key'), { status: 401 }),
+    });
     // fallback 正常返回
     const fallback = createMockAdapter([textDoneEvent('fallback answer')]);
 
@@ -151,8 +192,12 @@ describe('AgentLoopEngine', () => {
   });
 
   it('P1 故障转移仅触发一次（fallback 也失败不回切）', async () => {
-    const primary = createMockAdapter([], { failWith: Object.assign(new Error('401'), { status: 401 }) });
-    const fallback = createMockAdapter([], { failWith: Object.assign(new Error('500'), { status: 500 }) });
+    const primary = createMockAdapter([], {
+      failWith: Object.assign(new Error('401'), { status: 401 }),
+    });
+    const fallback = createMockAdapter([], {
+      failWith: Object.assign(new Error('500'), { status: 500 }),
+    });
 
     const engine = new AgentLoopEngine({ retryCount: 0 }, primary);
     engine.setFallbackAdapter(fallback);
@@ -162,3 +207,72 @@ describe('AgentLoopEngine', () => {
     expect(output.terminationReason).toBe(TerminationReason.ERROR);
   });
 });
+
+// ===== v0.7.3 P4-4 / P3-1: 死循环乒乓检测 + REFLECTING 状态接线 =====
+
+describe('AgentLoopEngine — 死循环乒乓检测（ABAB，P4-4）', () => {
+  it('最近 4 轮 A→B→A→B 交替（A≠B）触发 DEAD_LOOP（驻留模式抓不住的乒乓）', async () => {
+    const readScript = toolCallEvent('read_file', { file_path: 'x.ts' });
+    const writeScript = toolCallEvent('write_file', { file_path: 'x.ts' });
+    // 1:read 2:write 3:read 4:write ← 第 4 轮 PARSING 时滑窗构成 ABAB
+    const adapter = createMockAdapter([readScript, writeScript, readScript, writeScript]);
+    const engine = new AgentLoopEngine({ maxIterations: 6 }, adapter);
+    const deadLoopEvents: unknown[] = [];
+    engine.on('deadLoop', (d) => deadLoopEvents.push(d));
+
+    const output = await engine.runStream(userMessage, 's1', [], systemPrompt);
+    expect(output.terminationReason).toBe(TerminationReason.DEAD_LOOP);
+    expect(deadLoopEvents.length).toBe(1);
+  });
+
+  it('A→B→C 交替（无重复模式）不误报，按 MAX_ITERATIONS 终止', async () => {
+    const scripts = [
+      toolCallEvent('read_file', { file_path: 'a.ts' }),
+      toolCallEvent('write_file', { file_path: 'a.ts' }),
+      toolCallEvent('lint_code', {}),
+    ];
+    const adapter = createMockAdapter(scripts);
+    const engine = new AgentLoopEngine({ maxIterations: 4 }, adapter);
+    const output = await engine.runStream(userMessage, 's1', [], systemPrompt);
+    expect(output.terminationReason).toBe(TerminationReason.MAX_ITERATIONS);
+  });
+
+  it('A→B→B→B 前缀不构成 ABAB（A≠B 约束），由驻留模式在 3 连 B 时接管', async () => {
+    const readScript = toolCallEvent('read_file', { file_path: 'x.ts' });
+    const writeScript = toolCallEvent('write_file', { file_path: 'x.ts' });
+    // 1:read 2:write 3:write 4:write —— 第 4 轮时 ABAB 不成立，但 3 连 write 命中驻留模式
+    const adapter = createMockAdapter([readScript, writeScript, writeScript, writeScript]);
+    const engine = new AgentLoopEngine({ maxIterations: 6 }, adapter);
+    const output = await engine.runStream(userMessage, 's1', [], systemPrompt);
+    expect(output.terminationReason).toBe(TerminationReason.DEAD_LOOP);
+  });
+});
+
+describe('AgentLoopEngine — REFLECTING 状态接线（P3-1 enableReflection）', () => {
+  const collectStates = async (config: Record<string, unknown>): Promise<string[]> => {
+    const adapter = createMockAdapter([
+      toolCallEvent('read_file', { file_path: 'a.ts' }),
+      textDoneEvent('done'),
+    ]);
+    const engine = new AgentLoopEngine(config as never, adapter);
+    const states: string[] = [];
+    engine.on('stateChange', (d: { state?: string; current?: string }) => {
+      const s = d.state ?? d.current ?? '';
+      if (!states.includes(s)) states.push(s);
+    });
+    await engine.runStream(userMessage, 's1', [], systemPrompt);
+    return states;
+  };
+
+  it('enableReflection=true 时工具执行后进入 REFLECTING 状态', async () => {
+    const states = await collectStates({ maxIterations: 2, enableReflection: true });
+    expect(states).toContain('REFLECTING');
+    expect(states).toContain('EXECUTING');
+    expect(states).toContain('OBSERVING');
+  });
+
+  it('enableReflection=false（默认）时不进入 REFLECTING', async () => {
+    const states = await collectStates({ maxIterations: 2, enableReflection: false });
+    expect(states).not.toContain('REFLECTING');
+  });
+});
diff --git a/electron/harness/agent-loop/engine.ts b/electron/harness/agent-loop/engine.ts
index 62ef773..0919469 100644
--- a/electron/harness/agent-loop/engine.ts
+++ b/electron/harness/agent-loop/engine.ts
@@ -50,7 +50,6 @@ class DeadLoopError extends Error {
 
 const DEFAULT_CONFIG: AgentLoopConfig = {
   maxIterations: 20,
-  timeoutMs: 120_000,
   totalTimeoutMs: 600_000,
   enableReflection: false,
   compressionThreshold: 0.8,
@@ -563,7 +562,7 @@ export class AgentLoopEngine extends EventEmitter {
           });
           // 抛出特殊错误，主循环捕获后以 DEAD_LOOP 原因终止
           throw new DeadLoopError(
-            `Detected a potential infinite loop: the same tool calls were repeated for 3 consecutive iterations. Please refine the approach or provide more specific instructions.`,
+            `Detected a potential infinite loop: the same tool calls were repeated for 3 consecutive iterations, or two alternating call patterns kept cycling (A→B→A→B) without progress. Please refine the approach or provide more specific instructions.`,
           );
         }
       }
@@ -620,7 +619,11 @@ export class AgentLoopEngine extends EventEmitter {
       await this.transitionTo(AgentLoopState.OBSERVING);
 
       // === v0.2.0: REFLECTING 状态 — 观察工具结果，决定是否继续 ===
-      // 如果有工具调用且需要后续推理，进入 REFLECTING 状态
+      // v0.7.3 接线说明：REFLECTING 分支此前依赖 enableReflection 配置，但该配置
+      // 全链路无任何置 true 的路径（死配置）。现由 agent.enableReflection 配置
+      // 真实驱动（main.ts baseConfig → updateConfigAll → 本分支），启用后每轮
+      // 工具执行完毕会经过 REFLECTING 状态：工具结果存在失败时记录告警日志，
+      // 供 SLO 与排障观察（不阻断循环——错误结果已由 CE-2 路径回传模型自愈）。
       if (this.config.enableReflection && step.toolCalls && step.toolCalls.length > 0) {
         await this.transitionTo(AgentLoopState.REFLECTING);
         // 检查工具执行是否有错误，如果有严重错误可以提前终止
@@ -1087,9 +1090,13 @@ export class AgentLoopEngine extends EventEmitter {
   /**
    * v0.3.0: 死循环检测
    *
-   * 检测策略：
-   * 将每轮的工具调用序列化为签名字符串，检查最近3轮的签名是否完全相同。
-   * 如果连续3轮使用完全相同的参数调用相同的工具，判定为死循环。
+   * 检测策略（v0.7.3 起双模式）：
+   * 1. 驻留模式 — 将每轮的工具调用序列化为签名字符串，检查最近3轮的签名是否完全相同。
+   *    如果连续3轮使用完全相同的参数调用相同的工具，判定为死循环。
+   * 2. 乒乓模式（v0.7.3 新增）— 最近4轮构成 ABAB 交替（r1===r3 && r2===r4 && r1!==r2）。
+   *    典型场景：模型在"读文件 A → 写文件 B"两步之间无限往返（每次读完又改回），
+   *    单步签名各不相同，驻留模式永不命中；docs/Agentic-Loop详解.md 第五章将
+   *    "两种状态间反复来回切换、毫无进展"列为必须检测的停滞模式。
    *
    * v0.3.0 修复：
    * - 对 args 的键进行排序，避免 JSON.stringify 键顺序不一致导致漏报
@@ -1123,21 +1130,31 @@ export class AgentLoopEngine extends EventEmitter {
 
     this.toolCallHistory.push(signature);
 
-    // 只保留最近5轮的记录（足够检测3轮重复，同时避免内存增长）
+    // 只保留最近5轮的记录（足够检测3轮重复与4轮乒乓，同时避免内存增长）
     if (this.toolCallHistory.length > 5) {
       this.toolCallHistory.shift();
     }
 
-    // 需要至少3轮数据才能检测
-    if (this.toolCallHistory.length < 3) return false;
-
     const len = this.toolCallHistory.length;
-    const r1 = this.toolCallHistory[len - 1]; // 当前轮
-    const r2 = this.toolCallHistory[len - 2]; // 上一轮
-    const r3 = this.toolCallHistory[len - 3]; // 上上一轮
 
-    // 连续3轮完全相同 → 死循环
-    return r1 === r2 && r2 === r3;
+    // 模式 1：连续3轮完全相同 → 死循环
+    if (len >= 3) {
+      const r1 = this.toolCallHistory[len - 1]; // 当前轮
+      const r2 = this.toolCallHistory[len - 2]; // 上一轮
+      const r3 = this.toolCallHistory[len - 3]; // 上上一轮
+      if (r1 === r2 && r2 === r3) return true;
+    }
+
+    // 模式 2（v0.7.3）：最近4轮 ABAB 交替（A≠B）→ 乒乓死循环
+    if (len >= 4) {
+      const a1 = this.toolCallHistory[len - 4];
+      const b1 = this.toolCallHistory[len - 3];
+      const a2 = this.toolCallHistory[len - 2];
+      const b2 = this.toolCallHistory[len - 1];
+      if (a1 === a2 && b1 === b2 && a1 !== b1) return true;
+    }
+
+    return false;
   }
 
   /**
diff --git a/electron/harness/agent-loop/types.ts b/electron/harness/agent-loop/types.ts
index f7f4bfb..c44da6b 100644
--- a/electron/harness/agent-loop/types.ts
+++ b/electron/harness/agent-loop/types.ts
@@ -60,7 +60,6 @@ export interface TokenUsage {
 
 export interface AgentLoopConfig {
   maxIterations: number;
-  timeoutMs: number;
   totalTimeoutMs: number;
   enableReflection: boolean;
   compressionThreshold: number;
diff --git a/electron/harness/hooks/__tests__/forget-session.test.ts b/electron/harness/hooks/__tests__/forget-session.test.ts
new file mode 100644
index 0000000..4f6c1af
--- /dev/null
+++ b/electron/harness/hooks/__tests__/forget-session.test.ts
@@ -0,0 +1,88 @@
+/**
+ * ConfirmationHook forgetSession 测试（v0.7.3 P2-3）
+ *
+ * 锁定会话终态清理契约：
+ * F1 forgetSession 清空该会话的决策记忆（拒绝记忆不再残留）；
+ * F2 forgetSession 同时拒绝该会话等待中的确认（clearPending 语义）；
+ * F3 会话隔离：清理 A 不影响 B；
+ * F4 空/未知 sessionId 幂等无副作用。
+ */
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+
+// 模拟一个存活窗口 —— beforeExecute 的 hasAvailableWindow 守卫需要它，
+// 否则确认请求在创建 pending 之前即被短路（测不到记忆/pending 路径）
+const fakeWindow = {
+  isDestroyed: () => false,
+  webContents: { send: vi.fn() },
+};
+vi.mock('electron', () => ({
+  BrowserWindow: { getAllWindows: vi.fn(() => [fakeWindow]) },
+}));
+
+import { ConfirmationHook } from '../confirmation-hook';
+import type { MetonaToolCall, MetonaToolDef } from '../../../harness/types';
+import { MetonaRiskLevel, MetonaToolCategory } from '../../../harness/types';
+
+function makeToolCall(name: string, id = `tc_${name}`): MetonaToolCall {
+  return { id, name, args: {}, iteration: 1, timestamp: Date.now() };
+}
+
+const NEEDS_CONFIRM_DEF: MetonaToolDef = {
+  name: 'run_command',
+  description: 'test',
+  parameters: { type: 'object', properties: {}, required: [] },
+  category: MetonaToolCategory.CODE_EXECUTION,
+  riskLevel: MetonaRiskLevel.HIGH,
+  requiresPermission: true,
+  timeoutMs: 1000,
+};
+
+describe('ConfirmationHook — forgetSession（P2-3）', () => {
+  let hook: ConfirmationHook;
+
+  beforeEach(() => {
+    vi.useFakeTimers();
+    hook = new ConfirmationHook(null, null);
+    hook.setToolDefs([NEEDS_CONFIRM_DEF]);
+  });
+
+  it('F1: 会话删除后决策记忆被清空（拒绝记忆不再跨生命周期残留）', async () => {
+    const pending = hook.beforeExecute(makeToolCall('run_command'), 'sess-A');
+    hook.resolveConfirmation(`tc_run_command`, false, true); // 记住拒绝
+    await pending;
+
+    expect(hook.getRememberedDenials('sess-A')).toHaveLength(1);
+    hook.forgetSession('sess-A');
+    expect(hook.getRememberedDenials('sess-A')).toHaveLength(0);
+  });
+
+  it('F2: forgetSession 拒绝该会话等待中的确认（clearPending 语义）', async () => {
+    const p1 = hook.beforeExecute(makeToolCall('run_command'), 'sess-A');
+    // resolve pending（拒绝）后走记忆清理路径
+    hook.forgetSession('sess-A');
+    await expect(p1).resolves.toMatchObject({ blocked: true });
+    // pending 已清空 —— getPendingConfirmations 无残留
+    expect(hook.getPendingConfirmations()).toHaveLength(0);
+  });
+
+  it('F3: 会话隔离 —— 清理 A 不影响 B 的决策记忆', async () => {
+    const p1 = hook.beforeExecute(makeToolCall('run_command', 'tc_A'), 'sess-A');
+    hook.resolveConfirmation('tc_A', false, true);
+    await p1;
+
+    const p2 = hook.beforeExecute(makeToolCall('run_command', 'tc_B'), 'sess-B');
+    hook.resolveConfirmation('tc_B', false, true);
+    await p2;
+
+    hook.forgetSession('sess-A');
+    expect(hook.getRememberedDenials('sess-A')).toHaveLength(0);
+    expect(hook.getRememberedDenials('sess-B')).toHaveLength(1);
+  });
+
+  it('F4: 空 sessionId 幂等无副作用；未知会话不抛错', () => {
+    expect(() => hook.forgetSession('')).not.toThrow();
+    expect(() => hook.forgetSession('nonexistent')).not.toThrow();
+    expect(hook.getRememberedDenials()).toHaveLength(0);
+  });
+});
diff --git a/electron/harness/hooks/confirmation-hook.ts b/electron/harness/hooks/confirmation-hook.ts
index eed5649..a0595cf 100644
--- a/electron/harness/hooks/confirmation-hook.ts
+++ b/electron/harness/hooks/confirmation-hook.ts
@@ -550,6 +550,22 @@ export class ConfirmationHook implements PreToolHook {
     }
   }
 
+  /**
+   * v0.7.3 P2-3: 会话生命周期终态清理（会话删除 / SubAgent 终结时调用）。
+   *
+   * 此前 rememberedDecisions 两级 Map 只增不减 —— 会话删除/子任务终结后其
+   * 决策记忆永久残留，长期运行实例随会话数缓慢泄漏。本方法与 clearPending
+   * 的区别：clearPending 只处理等待中的确认（会话中断时用，会话本身仍存活），
+   * 本方法面向"会话已终结"的终态，同时清空 pending 与决策记忆。
+   *
+   * @param sessionId 会话 ID（主会话或 SubAgent taskId）
+   */
+  forgetSession(sessionId: string): void {
+    if (!sessionId) return;
+    this.clearPending(sessionId);
+    this.rememberedDecisions.delete(sessionId);
+  }
+
   // ===== 私有辅助（v0.5.0: 会话隔离） =====
 
   /** 获取（或创建）指定会话的决策记忆表 */
diff --git a/electron/harness/memory/__tests__/consolidation-policy.test.ts b/electron/harness/memory/__tests__/consolidation-policy.test.ts
new file mode 100644
index 0000000..6783cb7
--- /dev/null
+++ b/electron/harness/memory/__tests__/consolidation-policy.test.ts
@@ -0,0 +1,97 @@
+/**
+ * 记忆固化触发决策测试（v0.7.3 P1-5）
+ *
+ * 锁定 shouldConsolidate 的四类判定：总开关 / 内容门控（回答长度 ∨ 成功工具调用）/
+ * 频率窗口（含首次不限）/ 配置兜底（非法数值回退安全下限）。
+ */
+
+import { describe, it, expect } from 'vitest';
+import {
+  shouldConsolidate,
+  MIN_CONSOLIDATION_INTERVAL_MS,
+  MIN_CONSOLIDATION_MIN_CHARS,
+} from '../consolidation-policy';
+
+const BASE = {
+  enabled: true,
+  answerChars: 500,
+  minChars: 200,
+  hadSuccessfulToolCall: false,
+  lastConsolidationAt: 0,
+  now: 1_000_000,
+  intervalMs: 600_000,
+};
+
+describe('shouldConsolidate', () => {
+  it('总开关显式关闭 → disabled', () => {
+    expect(shouldConsolidate({ ...BASE, enabled: false })).toEqual({
+      consolidate: false,
+      reason: 'disabled',
+    });
+  });
+
+  it('回答够长且首次固化 → 允许（lastConsolidationAt=0 不受频率限制）', () => {
+    expect(shouldConsolidate(BASE)).toEqual({
+      consolidate: true,
+      reason: 'content-and-frequency-pass',
+    });
+  });
+
+  it('回答过短且无成功工具调用 → below-threshold（短寒暄不触发固化）', () => {
+    expect(shouldConsolidate({ ...BASE, answerChars: 50, hadSuccessfulToolCall: false })).toEqual({
+      consolidate: false,
+      reason: 'below-threshold',
+    });
+  });
+
+  it('回答过短但存在成功工具调用 → 允许（事实性上下文可沉淀）', () => {
+    expect(shouldConsolidate({ ...BASE, answerChars: 50, hadSuccessfulToolCall: true })).toEqual({
+      consolidate: true,
+      reason: 'content-and-frequency-pass',
+    });
+  });
+
+  it('频率窗口内重复触发 → throttled', () => {
+    expect(
+      shouldConsolidate({
+        ...BASE,
+        lastConsolidationAt: BASE.now - 60_000, // 1 分钟前刚固化过
+      }),
+    ).toEqual({ consolidate: false, reason: 'throttled' });
+  });
+
+  it('频率窗口已过 → 允许', () => {
+    expect(
+      shouldConsolidate({
+        ...BASE,
+        lastConsolidationAt: BASE.now - 600_001,
+      }),
+    ).toEqual({ consolidate: true, reason: 'content-and-frequency-pass' });
+  });
+
+  it('配置兜底：minChars=0 不会让纯寒暄触发（安全下限生效）', () => {
+    expect(shouldConsolidate({ ...BASE, minChars: 0, answerChars: 10 })).toEqual({
+      consolidate: false,
+      reason: 'below-threshold',
+    });
+    expect(MIN_CONSOLIDATION_MIN_CHARS).toBeGreaterThan(0);
+  });
+
+  it('配置兜底：intervalMs=0 不会退化为每条消息固化（安全下限生效）', () => {
+    expect(
+      shouldConsolidate({
+        ...BASE,
+        intervalMs: 0,
+        lastConsolidationAt: BASE.now - 30_000, // 30 秒前刚固化
+      }),
+    ).toEqual({ consolidate: false, reason: 'throttled' });
+    expect(MIN_CONSOLIDATION_INTERVAL_MS).toBeGreaterThanOrEqual(60_000);
+  });
+
+  it('配置兜底：minChars/intervalMs 为 NaN 时按默认值处理', () => {
+    expect(shouldConsolidate({ ...BASE, minChars: Number.NaN, intervalMs: Number.NaN })).toEqual({
+      consolidate: true,
+      reason: 'content-and-frequency-pass',
+    });
+  });
+});
diff --git a/electron/harness/memory/consolidation-policy.ts b/electron/harness/memory/consolidation-policy.ts
new file mode 100644
index 0000000..1299fd8
--- /dev/null
+++ b/electron/harness/memory/consolidation-policy.ts
@@ -0,0 +1,74 @@
+/**
+ * Consolidation Policy — 记忆固化触发决策（v0.7.3 P1-5）
+ *
+ * 背景：MemoryConsolidator 在每次 run 完成后无条件发起一次非流式 LLM 请求
+ * （30s 超时）判断本次对话是否有值得持久化的记忆。短寒暄/单轮问答同样触发，
+ * 纯成本浪费且对 Provider 构成无意义请求压力。
+ *
+ * 本模块把触发决策收敛为纯函数（可表测），决策输入：
+ * - 总开关 memory.consolidationEnabled（fail-secure：仅显式 false 才关闭）
+ * - 内容门控：本次回答 ≥ minChars 字符 **或** 本次 run 存在成功的工具调用
+ *   （工具调用意味着产生了可沉淀的事实性上下文）
+ * - 频率门控：距该会话上次固化 ≥ intervalMs（首次不设限，但仍受内容门控约束）
+ *
+ * 决策与执行解耦：本模块不做 IO，调用方（ipc/agent.ts）持有会话级
+ * lastConsolidationAt 状态并执行 consolidate。
+ */
+
+export interface ConsolidationDecisionInput {
+  /** 总开关（memory.consolidationEnabled；undefined/null 视为开启） */
+  enabled: boolean | null | undefined;
+  /** 本次 Agent 最终回答的字符数 */
+  answerChars: number;
+  /** 内容门控阈值（memory.consolidationMinChars，默认 200） */
+  minChars: number;
+  /** 本次 run 是否存在成功的工具调用 */
+  hadSuccessfulToolCall: boolean;
+  /** 该会话上次固化的时间戳（0 = 从未固化） */
+  lastConsolidationAt: number;
+  /** 当前时间戳 */
+  now: number;
+  /** 频率门控窗口（memory.consolidationIntervalMs，默认 600000） */
+  intervalMs: number;
+}
+
+export type ConsolidationDecision =
+  | { consolidate: true; reason: 'content-and-frequency-pass' }
+  | { consolidate: false; reason: 'disabled' | 'below-threshold' | 'throttled' };
+
+/** 频率窗口合法下限（防误配 0/负值导致门控失效——0 等价于每条消息都固化） */
+export const MIN_CONSOLIDATION_INTERVAL_MS = 60_000;
+
+/** 内容门控合法下限（防误配 0 导致纯寒暄也固化） */
+export const MIN_CONSOLIDATION_MIN_CHARS = 20;
+
+/**
+ * 判定本次 run 是否应触发记忆固化。
+ */
+export function shouldConsolidate(input: ConsolidationDecisionInput): ConsolidationDecision {
+  // 1. 总开关 —— fail-secure 语义由调用方负责（!== false 才视为开启后传入布尔）
+  if (input.enabled === false) {
+    return { consolidate: false, reason: 'disabled' };
+  }
+
+  // 2. 内容门控：回答够长 或 有成功的工具调用（事实性上下文）
+  const minChars = Math.max(
+    MIN_CONSOLIDATION_MIN_CHARS,
+    Number.isFinite(input.minChars) ? input.minChars : 200,
+  );
+  const contentWorthy = input.answerChars >= minChars || input.hadSuccessfulToolCall;
+  if (!contentWorthy) {
+    return { consolidate: false, reason: 'below-threshold' };
+  }
+
+  // 3. 频率门控：上次固化距今不足窗口 → 跳过（首次 lastConsolidationAt=0 不受限）
+  const intervalMs = Math.max(
+    MIN_CONSOLIDATION_INTERVAL_MS,
+    Number.isFinite(input.intervalMs) ? input.intervalMs : 600_000,
+  );
+  if (input.lastConsolidationAt > 0 && input.now - input.lastConsolidationAt < intervalMs) {
+    return { consolidate: false, reason: 'throttled' };
+  }
+
+  return { consolidate: true, reason: 'content-and-frequency-pass' };
+}
diff --git a/electron/harness/orchestration/orchestrator.ts b/electron/harness/orchestration/orchestrator.ts
index 58d7f3f..7fa260f 100644
--- a/electron/harness/orchestration/orchestrator.ts
+++ b/electron/harness/orchestration/orchestrator.ts
@@ -167,6 +167,8 @@ export class TaskOrchestrator extends EventEmitter {
         thinkingEffort: this.defaultConfig?.thinkingEffort ?? 'medium',
         contextLength: this.defaultConfig?.contextLength,
         contextWindow: this.defaultConfig?.contextWindow ?? 128_000,
+        // v0.7.3 P3-1: SubAgent 与主引擎同源消费 enableReflection（REFLECTING 状态开关）
+        enableReflection: this.defaultConfig?.enableReflection ?? false,
       },
       this.engines.createAdapter(),
       this.toolRegistry,
diff --git a/electron/harness/prompts/__tests__/context-builder.test.ts b/electron/harness/prompts/__tests__/context-builder.test.ts
index 3fe52f6..4c87b75 100644
--- a/electron/harness/prompts/__tests__/context-builder.test.ts
+++ b/electron/harness/prompts/__tests__/context-builder.test.ts
@@ -64,11 +64,23 @@ describe('ContextBuilder — isUsingFallbackRole 首次降级通知语义', () =
 });
 
 describe('ContextBuilder — 动态区注入', () => {
-  it('注入当前日期时间（含本地时区）', () => {
+  it('v0.7.3 P1-1: 不再注入日期时间（prompt cache 前缀稳定性）', () => {
     const cb = new ContextBuilder();
     const prompt = cb.buildSystemPrompt({ soul: 'x', memory: '' });
-    expect(prompt.dynamicReminders).toContain('## Current Date & Time');
-    expect(prompt.dynamicReminders).toMatch(/UTC[+-]/);
+    expect(prompt.dynamicReminders).not.toContain('## Current Date & Time');
+    expect(prompt.dynamicReminders).not.toMatch(/UTC[+-]/);
+  });
+
+  it('v0.7.3 P1-1: system 输出跨调用字节级稳定（同输入 → 同字节）', () => {
+    const cb = new ContextBuilder();
+    const files = { soul: 'x', memory: '## 用户偏好\n- 偏好深色主题' };
+    const a = cb.buildSystemPrompt(files, '/tmp/ws-demo');
+    const b = cb.buildSystemPrompt(files, '/tmp/ws-demo');
+    // 跨 run 缓存命中的前提：四分区逐字节一致（日期时间已移入用户消息前置块）
+    expect(a.roleDefinition).toBe(b.roleDefinition);
+    expect(a.outputConstraints).toBe(b.outputConstraints);
+    expect(a.safetyGuidelines).toBe(b.safetyGuidelines);
+    expect(a.dynamicReminders).toBe(b.dynamicReminders);
   });
 
   it('注入工作空间路径（动态区，路径可切换）', () => {
diff --git a/electron/harness/prompts/__tests__/user-context.test.ts b/electron/harness/prompts/__tests__/user-context.test.ts
new file mode 100644
index 0000000..67eb94f
--- /dev/null
+++ b/electron/harness/prompts/__tests__/user-context.test.ts
@@ -0,0 +1,94 @@
+/**
+ * 用户上下文前置块测试（v0.7.3 P1-1）
+ *
+ * 锁定三类动态内容（日期时间 / 记忆 / 附件提示）在用户消息前置块的
+ * 分组结构与空值收缩行为 —— 它们从 system prompt 迁出的契约面。
+ */
+
+import { describe, it, expect } from 'vitest';
+import { buildUserContextPrefix, withUserContextPrefix } from '../user-context';
+
+describe('buildUserContextPrefix', () => {
+  it('恒含头部说明与日期时间分区（唯一无条件分区）', () => {
+    const prefix = buildUserContextPrefix({ now: Date.UTC(2026, 7, 30, 6, 30) });
+    expect(prefix).toContain('[Contextual information for this message');
+    expect(prefix).toContain('## Current Date & Time');
+  });
+
+  it('无记忆/附件时不产出对应分区（空值收缩）', () => {
+    const prefix = buildUserContextPrefix({ now: Date.now() });
+    expect(prefix).not.toContain('## Relevant Memories (Retrieved)');
+    expect(prefix).not.toContain('## User Attachments (Direct Upload)');
+  });
+
+  it('记忆分区：条目格式与截断口径（沿用原 system 注入契约）', () => {
+    const prefix = buildUserContextPrefix({
+      now: Date.now(),
+      memories: [
+        {
+          id: 'm1',
+          type: 'semantic',
+          content: 'x'.repeat(500),
+          source: 'agent_thought',
+          importance: 0.9,
+          score: 0.8,
+          createdAt: Date.now(),
+        },
+      ],
+    });
+    expect(prefix).toContain('## Relevant Memories (Retrieved)');
+    expect(prefix).toMatch(/\[1\] \(semantic, 重要度: 0\.9\)/);
+    // 内容截断到 200 字符
+    expect(prefix).toContain('x'.repeat(200));
+    expect(prefix).not.toContain('x'.repeat(201));
+  });
+
+  it('附件分区：图片提示禁止重复读图；文本截断标记透传', () => {
+    const prefix = buildUserContextPrefix({
+      now: Date.now(),
+      attachments: [
+        { name: 'shot.png', type: 'image' },
+        { name: 'big.log', type: 'text', truncated: true },
+      ],
+    });
+    expect(prefix).toContain('## User Attachments (Direct Upload)');
+    expect(prefix).toContain('1. [image] shot.png');
+    expect(prefix).toContain('do NOT call view_image');
+    expect(prefix).toContain('2. [text file] big.log');
+    expect(prefix).toContain('TRUNCATED — only the first 512KB is included');
+  });
+
+  it('分区以 --- 分隔且以前缀分隔符收尾（调用方可直接拼接用户内容）', () => {
+    const prefix = buildUserContextPrefix({
+      now: Date.now(),
+      memories: [
+        {
+          id: 'm',
+          type: 'episodic',
+          content: 'c',
+          source: 'user_input',
+          importance: 0.5,
+          score: 0.5,
+          createdAt: Date.now(),
+        },
+      ],
+      attachments: [{ name: 'a.txt', type: 'text' }],
+    });
+    expect(prefix).toMatch(/---\s*$/);
+    // 三个分区恰好两个内部 --- + 收尾 1 个 ---（共 3 个独立行）
+    expect(prefix.match(/^---$/gm)?.length ?? 0).toBe(3);
+  });
+});
+
+describe('withUserContextPrefix', () => {
+  it('前置块与用户内容拼接（前置块自带收尾分隔符）', () => {
+    const prefix = buildUserContextPrefix({ now: Date.now() });
+    const out = withUserContextPrefix(prefix, '你好，帮我写个脚本');
+    expect(out.startsWith(prefix)).toBe(true);
+    expect(out.endsWith('你好，帮我写个脚本')).toBe(true);
+  });
+
+  it('空前缀原样返回（契约防御）', () => {
+    expect(withUserContextPrefix('', 'hello')).toBe('hello');
+  });
+});
diff --git a/electron/harness/prompts/context-builder.ts b/electron/harness/prompts/context-builder.ts
index 77afc36..73d9cd1 100644
--- a/electron/harness/prompts/context-builder.ts
+++ b/electron/harness/prompts/context-builder.ts
@@ -58,7 +58,10 @@ export class ContextBuilder {
    *
    * v0.3.14: 移除 AGENTS.md 和 USERS.md 的读取，SOUL.md 仅做角色定义
    */
-  buildSystemPrompt(workspaceFiles?: WorkspaceFiles, workspacePath?: string): {
+  buildSystemPrompt(
+    workspaceFiles?: WorkspaceFiles,
+    workspacePath?: string,
+  ): {
     roleDefinition: string;
     outputConstraints: string;
     safetyGuidelines: string;
@@ -76,23 +79,19 @@ export class ContextBuilder {
     // ===== 动态区：记忆 =====
     const dynamicParts: string[] = [];
 
-    // v0.3.14: 注入当前系统日期时间（每次构建时获取最新时间）
-    // 用于让 AI 准确理解"今天"、"昨天"等相对时间表达
-    // #43 修复: 时区硬编码 Asia/Shanghai 改为使用系统本地时区，跨时区用户显示正确
-    const now = new Date();
-    const localTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone ?? 'Asia/Shanghai';
-    // 审查修复: 恢复 UTC 偏移显示，在时区名后附加 UTC 偏移，避免丢失时区偏移信息
-    const offset = -now.getTimezoneOffset() / 60;
-    const offsetStr = offset >= 0 ? `UTC+${offset}` : `UTC${offset}`;
-    const dateTimeStr = now.toLocaleString('zh-CN', {
-      timeZone: localTimezone,
-      hour12: false,
-    });
-    dynamicParts.push(`## Current Date & Time\n${dateTimeStr} (${localTimezone}, ${offsetStr})`);
+    // v0.7.3 P1-1 根治: 当前日期时间不再注入 system prompt —— 此前每次构建都
+    // 产生不同字节（秒级时间戳 + 时区），导致跨 run 的 system 前缀永不一致，
+    // DeepSeek 自动上下文缓存 / Anthropic 显式缓存全部 miss。现移入用户消息
+    // 前置块（@see user-context.ts），system 保持跨 run 字节级稳定。
+    // MEMORY.md 的 `> 创建时间/最后更新` 元数据行由 extractContent 剥离，
+    // 正文提取不受时间戳更新影响 —— 此处无需额外处理。
 
-    // 注入当前工作空间路径（动态区，路径可能切换故不放入静态区）
+    // 注入当前工作空间路径（动态区，路径可能切换故不放入静态区；
+    // 会话期间路径恒定，不破坏缓存）
     if (workspacePath) {
-      dynamicParts.push(`## Current Workspace\nWorkspace root path: \`${workspacePath}\`\n\nAll relative paths in tool calls are resolved against this workspace root. Use this path when absolute paths are required (e.g., in run_command).`);
+      dynamicParts.push(
+        `## Current Workspace\nWorkspace root path: \`${workspacePath}\`\n\nAll relative paths in tool calls are resolved against this workspace root. Use this path when absolute paths are required (e.g., in run_command).`,
+      );
     }
 
     if (workspaceFiles?.memory) {
@@ -138,7 +137,9 @@ export class ContextBuilder {
     } else {
       // v0.3.18 修复: 降级时打 WARN 日志 + 设置标志，供 IPC 层读取后发 toast
       this.lastUsedFallbackRole = true;
-      log.warn('[ContextBuilder] SOUL.md is missing or empty, falling back to default Metona identity');
+      log.warn(
+        '[ContextBuilder] SOUL.md is missing or empty, falling back to default Metona identity',
+      );
       // 兜底身份定义（Metona 灵魂定义）
       parts.push(`# Metona — 灵魂定义
 > "想清楚再动手，做对比做快重要"
diff --git a/electron/harness/prompts/user-context.ts b/electron/harness/prompts/user-context.ts
new file mode 100644
index 0000000..74b0e0e
--- /dev/null
+++ b/electron/harness/prompts/user-context.ts
@@ -0,0 +1,140 @@
+/**
+ * User Context Prefix — 每条用户消息的系统上下文前置块（v0.7.3 P1-1 根治）
+ *
+ * 背景（Prompt Cache 被打穿的根因）：
+ * 此前「当前日期时间」「检索到的相关记忆」「附件提示」三类**每条消息都在变**
+ * 的内容被追加进 systemPrompt.dynamicReminders —— OpenAI 兼容系将其拼进首条
+ * system 消息、Anthropic 写入顶层 system 字段。任何一次变化都会使整个 system
+ * 前缀失配，DeepSeek 自动上下文缓存 / Anthropic 显式缓存全部 miss。长 system
+ * （SOUL + 安全准则 + MEMORY.md）× 每 run 最多 20 轮迭代 × 全量重算输入 token，
+ * 成本与首字延迟被系统性放大。
+ *
+ * 现契约（单一事实来源）：
+ * - system prompt 只保留跨 run 字节级稳定的内容（SOUL / 约束 / 安全准则 /
+ *   工作空间路径 / MEMORY.md 正文——其易变的 `> 最后更新` 元数据行本就被
+ *   extractContent 剥离）；Anthropic 侧对该稳定前缀打 cache_control 断言；
+ * - 易变内容（日期时间 / 记忆 / 附件提示）由本模块构建为**用户消息前置块**，
+ *   随当次请求注入首条 user 消息（LLM 语义等价：Claude Code 同款上下文注入位）；
+ * - DB 持久化 / 前端展示 / 记忆固化 / 注入检测均使用**原始干净内容**，
+ *   前置块只存在于发给引擎的副本上。
+ *
+ * 纯函数、零副作用：可在 node vitest 下直接表测（稳定性/分组/空值收缩）。
+ */
+
+import type { SearchResult } from '../memory/manager';
+
+/** 附件提示所需的元信息子集（与 agent-store AttachmentInfo 对齐的渲染端子集） */
+export interface AttachmentHint {
+  name: string;
+  type: string;
+  truncated?: boolean;
+}
+
+export interface UserContextPrefixInput {
+  /** 当前时间戳（前置块内降精度到分钟，减少无意义抖动） */
+  now?: number;
+  /** 检索到的相关记忆（空数组时不产出记忆分区） */
+  memories?: SearchResult[];
+  /** 用户附件元信息（空数组/undefined 时不产出附件分区） */
+  attachments?: AttachmentHint[];
+  /**
+   * 时区标签（如 "Asia/Shanghai (UTC+8)"）。
+   * 由调用方计算（Intl.DateTimeFormat().resolvedOptions().timeZone）——
+   * 本模块保持纯函数语义，不做 Electron/Intl 环境依赖。
+   */
+  timezoneLabel?: string;
+}
+
+/** 记忆注入条目的内容截断（与原 dynamicReminders 注入口径一致） */
+const MEMORY_EXCERPT_CHARS = 200;
+/** 附件提示上限（与输入侧 5 个附件的硬上限对齐） */
+const MAX_ATTACHMENT_HINTS = 8;
+
+/**
+ * 构建用户消息上下文前置块。
+ *
+ * 输出形态（各分区以 `\n\n---\n\n` 分隔，整体以分隔符结尾，
+ * 调用方直接 `${prefix}${userContent}` 拼接）：
+ * ```
+ * [Contextual information for this message — system-generated metadata, not part of the user's request.]
+ *
+ * ## Current Date & Time
+ * 2026/8/30 14:30:00 (Asia/Shanghai, UTC+8)
+ *
+ * ---
+ *
+ * ## Relevant Memories (Retrieved)
+ * [1] (semantic, 重要度: 0.9) ...
+ *
+ * ---
+ *
+ * ## User Attachments (Direct Upload)
+ * ...
+ * ```
+ */
+export function buildUserContextPrefix(input: UserContextPrefixInput): string {
+  const parts: string[] = [];
+
+  // ===== 分区 1：当前日期时间（降精度到分钟） =====
+  const now = input.now ?? Date.now();
+  const timezoneLabel = input.timezoneLabel ?? 'UTC';
+  const dateStr = new Date(now).toLocaleString('sv-SE', {
+    timeZone: undefined,
+    hour12: false,
+  }); // sv-SE 给出 ISO 形态 "2026-08-30 14:30:00"
+  parts.push(`## Current Date & Time\n${dateStr} (${timezoneLabel})`);
+
+  // ===== 分区 2：相关记忆注入（沿用原 system 注入的展示口径） =====
+  const memories = (input.memories ?? []).slice(0, 5);
+  if (memories.length > 0) {
+    const memorySection = memories
+      .map(
+        (m, i) =>
+          `[${i + 1}] (${m.type}, 重要度: ${m.importance.toFixed(1)}) ${m.content.slice(0, MEMORY_EXCERPT_CHARS)}`,
+      )
+      .join('\n');
+    parts.push(`## Relevant Memories (Retrieved)\n${memorySection}`);
+  }
+
+  // ===== 分区 3：附件提示（沿用原 system 注入的语义与文案契约） =====
+  const attachments = (input.attachments ?? []).slice(0, MAX_ATTACHMENT_HINTS);
+  if (attachments.length > 0) {
+    const attachmentList = attachments
+      .map((att, i) => {
+        const typeLabel =
+          att.type === 'image' ? 'image' : att.type === 'text' ? 'text file' : 'file';
+        // 文本附件被上传入口截断（512KB 上限）时，明确告知 LLM 内容不完整，
+        // 防止模型把残缺内容当作完整文件事实（v0.7.2 A5 契约延续）
+        const truncatedNote =
+          att.truncated === true
+            ? ' (TRUNCATED — only the first 512KB is included; the full content is NOT available)'
+            : '';
+        const note =
+          att.type === 'image'
+            ? 'already provided to you via vision capability — you can SEE it directly, do NOT call view_image or any tool to read it again'
+            : att.type === 'text'
+              ? `content${truncatedNote} already inlined in the user message, do NOT search in workspace or read it again`
+              : 'uploaded directly by user, do NOT search in workspace';
+        return `${i + 1}. [${typeLabel}] ${att.name} — ${note}`;
+      })
+      .join('\n');
+
+    parts.push(
+      `## User Attachments (Direct Upload)\nThe following files were uploaded directly by the user to this conversation. They are inline attachments, NOT workspace files:\n${attachmentList}\n\n**IMPORTANT**: Images listed above are already visible to you in this conversation. Do NOT call \`view_image\`, \`read_file\`, or any file tool to read them — doing so wastes a tool call and may fail (they are not workspace files).`,
+    );
+  }
+
+  const header =
+    "[Contextual information for this message — system-generated metadata, not part of the user's request.]";
+
+  return `${header}\n\n${parts.join('\n\n---\n\n')}\n\n---\n\n`;
+}
+
+/**
+ * 将前置块与用户原始内容拼装为发送给引擎的消息内容。
+ * 空前缀（理论上不会发生——日期分区恒存在，但契约上防御）时原样返回。
+ */
+export function withUserContextPrefix(prefix: string, userContent: string): string {
+  if (!prefix) return userContent;
+  return `${prefix}${userContent}`;
+}
diff --git a/electron/harness/tools/built-in/__tests__/ssrf-dispatcher.test.ts b/electron/harness/tools/built-in/__tests__/ssrf-dispatcher.test.ts
new file mode 100644
index 0000000..4b92519
--- /dev/null
+++ b/electron/harness/tools/built-in/__tests__/ssrf-dispatcher.test.ts
@@ -0,0 +1,103 @@
+/**
+ * SSRF DNS Pinning 测试（v0.7.3 P2-1）
+ *
+ * 锁定三个单元：
+ * D1 createPinnedLookup —— 只返回校验阶段锁定的 IP 集合（过滤非法 family），
+ *    空集合返回 ENOTFOUND（防御）。
+ * D2 resolveRedirectTarget —— 重定向状态识别 + 相对 Location 解析 +
+ *    非法/缺失 Location 返回 null。
+ * D3 resolvePinnedIps —— IP 直连与私网拒绝（走 ssrf-guard 单一事实来源；
+ *    域名解析路径由 ssrf-guard 表测覆盖，此处不重复触网）。
+ */
+
+import { describe, it, expect } from 'vitest';
+import { createPinnedLookup, resolveRedirectTarget, resolvePinnedIps } from '../ssrf-dispatcher';
+import type { LookupCallback } from '../ssrf-dispatcher';
+
+describe('createPinnedLookup', () => {
+  it('D1: 仅返回钉死的 IP 集合（忽略 hostname），family 正确标注', async () => {
+    const lookup = createPinnedLookup(['93.184.216.34', '2606:2800:220:1:248:1893:25c8:1946']);
+    const result = await new Promise<{ address: string; family: number }[]>((resolve, reject) => {
+      const cb: LookupCallback = (err, addresses) => (err ? reject(err) : resolve(addresses!));
+      lookup('attacker.example', {}, cb);
+    });
+    expect(result).toHaveLength(2);
+    expect(result[0]).toEqual({ address: '93.184.216.34', family: 4 });
+    expect(result[1].family).toBe(6);
+  });
+
+  it('D1: 非法 family（非 IPv4/IPv6 字符串）被过滤', async () => {
+    const lookup = createPinnedLookup(['not-an-ip']);
+    await expect(
+      new Promise((resolve, reject) => {
+        const cb: LookupCallback = (err, addresses) => (err ? reject(err) : resolve(addresses));
+        lookup('h', {}, cb as never);
+      }),
+    ).rejects.toMatchObject({ code: 'ENOTFOUND' });
+  });
+
+  it('D1: 空集合 → ENOTFOUND（防御：调用方不应构造空 pin dispatcher）', async () => {
+    const lookup = createPinnedLookup([]);
+    await expect(
+      new Promise((resolve, reject) => {
+        const cb: LookupCallback = (err, addresses) => (err ? reject(err) : resolve(addresses));
+        lookup('h', {}, cb as never);
+      }),
+    ).rejects.toMatchObject({ code: 'ENOTFOUND' });
+  });
+});
+
+describe('resolveRedirectTarget', () => {
+  const makeResponse = (status: number, location?: string) => ({
+    status,
+    headers: {
+      get: (name: string) => (name.toLowerCase() === 'location' ? (location ?? null) : null),
+    },
+  });
+
+  it('D2: 301/302/303/307/308 识别并解析绝对 Location', () => {
+    for (const status of [301, 302, 303, 307, 308]) {
+      expect(
+        resolveRedirectTarget(makeResponse(status, 'https://cdn.example.com/x'), 'https://a.test/'),
+      ).toBe('https://cdn.example.com/x');
+    }
+  });
+
+  it('D2: 相对 Location 以当前 URL 为基解析（RFC 7231）', () => {
+    expect(resolveRedirectTarget(makeResponse(302, '/next?a=1'), 'https://a.test/dir/page')).toBe(
+      'https://a.test/next?a=1',
+    );
+  });
+
+  it('D2: 非 3xx 状态 → null（终态）', () => {
+    expect(resolveRedirectTarget(makeResponse(200), 'https://a.test/')).toBeNull();
+    expect(resolveRedirectTarget(makeResponse(404), 'https://a.test/')).toBeNull();
+  });
+
+  it('D2: 缺失/非法 Location → null', () => {
+    expect(resolveRedirectTarget(makeResponse(302), 'https://a.test/')).toBeNull();
+    expect(resolveRedirectTarget(makeResponse(302, ''), 'https://a.test/')).toBeNull();
+    expect(resolveRedirectTarget(makeResponse(302, 'http://[::bad'), 'https://a.test/')).toBeNull();
+  });
+});
+
+describe('resolvePinnedIps', () => {
+  it('D3: IP 直连 URL —— 公网 IP 直接返回', async () => {
+    const ips = await resolvePinnedIps('https://93.184.216.34/x');
+    expect(ips).toEqual(['93.184.216.34']);
+  });
+
+  it('D3: 私有/回环 IP 直连被拒（单一事实来源 ssrf-guard）', async () => {
+    for (const host of ['127.0.0.1', '10.0.0.5', '169.254.169.254', '192.168.1.1', '[::1]']) {
+      await expect(resolvePinnedIps(`http://${host}/latest`)).rejects.toThrow(/Blocked SSRF/);
+    }
+  });
+
+  it('D3: 非 http/https 协议被拒', async () => {
+    await expect(resolvePinnedIps('ftp://example.com')).rejects.toThrow(/not allowed/);
+  });
+
+  it('D3: 非法 URL 被拒', async () => {
+    await expect(resolvePinnedIps('not a url')).rejects.toThrow(/Invalid URL/);
+  });
+});
diff --git a/electron/harness/tools/built-in/browser-window-manager.ts b/electron/harness/tools/built-in/browser-window-manager.ts
index da29de5..c2ef523 100644
--- a/electron/harness/tools/built-in/browser-window-manager.ts
+++ b/electron/harness/tools/built-in/browser-window-manager.ts
@@ -9,6 +9,8 @@
 
 import { BrowserWindow, session } from 'electron';
 import log from 'electron-log';
+// v0.7.3 P2-2: CORS Origin 回显（纯函数在 network-utils，可表测）
+import { corsAllowOrigin, extractOriginHeader } from './network-utils';
 
 /** Agent 浏览器专用 session partition — 与主应用 default session 完全隔离 */
 const AGENT_PARTITION = 'persist:metona-agent-browser';
@@ -128,12 +130,22 @@ export class BrowserWindowManager {
 
       // v0.3.0 修复: 使用 CORS 放行替代 webSecurity: false
       // 仅对 agent session 放行 CORS，不影响主应用
+      // v0.7.3 P2-2 收紧: ACAO 从通配 '*' 改为回显请求 Origin —— 通配值让任意
+      // 第三方页面都能借该分区跨域读取；回显等价保留截图/页面自身跨域能力，
+      // 并附加 Vary: Origin 防止共享缓存把定向值串到其他 Origin。
       const agentSession = session.fromPartition(AGENT_PARTITION);
       agentSession.webRequest.onHeadersReceived((details, callback) => {
+        // Electron 类型在此版本的 OnHeadersReceivedListenerDetails 上不暴露
+        // requestHeaders —— 显式声明读取面（Origin 大小写不敏感提取）
+        const requestHeaders = (
+          details as unknown as { requestHeaders?: Record<string, string | string[] | undefined> }
+        ).requestHeaders;
+        const originHeader = extractOriginHeader(requestHeaders);
         callback({
           responseHeaders: {
             ...details.responseHeaders,
-            'Access-Control-Allow-Origin': ['*'],
+            'Access-Control-Allow-Origin': corsAllowOrigin(originHeader),
+            Vary: [...(details.responseHeaders?.Vary ?? []), 'Origin'],
           },
         });
       });
diff --git a/electron/harness/tools/built-in/command.ts b/electron/harness/tools/built-in/command.ts
index 90e1ef7..30f372b 100644
--- a/electron/harness/tools/built-in/command.ts
+++ b/electron/harness/tools/built-in/command.ts
@@ -25,6 +25,9 @@ import type { MetonaToolDef } from '../../../harness/types';
 import { MetonaToolCategory, MetonaRiskLevel } from '../../../harness/types';
 import { commandTouchesProtectedFile, isPathWithinWorkspace } from './file-guard';
 import type { SandboxManager } from '../../sandbox/sandbox';
+// v0.7.3 P3-2: 子进程环境净化收敛到 utils/safe-env.ts 单源
+// （与 MCP stdio 启动共用同一黑名单，历史双实现已漂移过一次）
+import { buildSafeChildEnv } from '../../../utils/safe-env';
 
 const execAsync = promisify(exec);
 const execFileAsync = promisify(execFile);
@@ -52,47 +55,22 @@ function decodeBuffer(buf: Buffer): string {
 /**
  * #9 修复 + 审查修复: 构建安全的子进程环境变量
  *
- * 审查修复: 原白名单方案遗漏了 GIT_* / PYTHONPATH / HTTP_PROXY 等常用变量，导致子进程功能破坏。
- * 改为黑名单方案：剔除包含敏感后缀的变量，保留其余。
+ * v0.7.3 P3-2: 实现收敛到 utils/safe-env.ts（buildSafeChildEnv）——
+ * 与 MCP stdio 启动共用同一黑名单，本文件仅保留 run_command 的运行时差异注入
+ * （Windows 中文编码变量）。黑名单方案的设计原因见 safe-env.ts 模块注释：
+ * 白名单方案会遗漏 GIT_* / PYTHONPATH / HTTP_PROXY 等常用变量导致子进程功能破坏。
  */
 function buildSafeCommandEnv(isWindows: boolean): Record<string, string> {
-  // 敏感变量后缀黑名单
-  const SENSITIVE_SUFFIXES = [
-    '_API_KEY',
-    '_TOKEN',
-    '_SECRET',
-    '_PASSWORD',
-    '_PASSWD',
-    '_CREDENTIAL',
-    '_CREDENTIALS',
-    '_PRIVATE_KEY',
-  ];
-  // 敏感变量名黑名单（精确匹配）
-  const SENSITIVE_KEYS = new Set([
-    'DEEPSEEK_API_KEY',
-    'AGNES_API_KEY',
-    'MIMO_API_KEY',
-    'GITEA_PASSWORD',
-    'DATABASE_PASSWORD',
-  ]);
-
-  const env: Record<string, string> = {};
-  for (const [key, val] of Object.entries(process.env)) {
-    if (!val) continue;
-    if (SENSITIVE_KEYS.has(key)) continue;
-    if (SENSITIVE_SUFFIXES.some((suffix) => key.toUpperCase().endsWith(suffix))) continue;
-    env[key] = val;
-  }
-
-  // 添加必要的运行时变量
-  env.NODE_ENV = 'production';
-  if (isWindows) {
-    env.PYTHONIOENCODING = 'utf-8';
-    env.LANG = 'zh_CN.UTF-8';
-    env.LC_ALL = 'zh_CN.UTF-8';
-  }
-
-  return env;
+  return buildSafeChildEnv({
+    runtime: isWindows
+      ? {
+          NODE_ENV: 'production',
+          PYTHONIOENCODING: 'utf-8',
+          LANG: 'zh_CN.UTF-8',
+          LC_ALL: 'zh_CN.UTF-8',
+        }
+      : { NODE_ENV: 'production' },
+  });
 }
 
 /**
diff --git a/electron/harness/tools/built-in/http-request.ts b/electron/harness/tools/built-in/http-request.ts
index 7b7a59a..3a2709b 100644
--- a/electron/harness/tools/built-in/http-request.ts
+++ b/electron/harness/tools/built-in/http-request.ts
@@ -14,7 +14,11 @@ import type { MetonaToolDef } from '../../../harness/types';
 import { MetonaToolCategory, MetonaRiskLevel } from '../../../harness/types';
 // v0.6.4 P2-2: SSRF 校验收敛到共享模块 ssrf-guard.ts —— 原实现是本文件私有逻辑，
 // web_fetch 无校验造成工具层最大的安全不对称。单源后所有网络工具行为一致。
+// v0.7.3 P2-1 根治: 请求层升级为 ssrfPinnedFetch —— 校验通过的 IP 集合 pin 到
+// 连接层（undici connect.lookup），校验与连接共用同一批 IP，DNS rebinding
+// 窗口（M7 已知限制）就此关闭；代理激活时自动退化为仅入口校验（见模块注释）。
 import { validateSSRF } from './ssrf-guard';
+import { ssrfPinnedFetch } from './ssrf-dispatcher';
 
 const ALLOWED_METHODS = ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'HEAD'] as const;
 const MAX_BODY_BYTES = 50 * 1024; // 50KB
@@ -52,7 +56,8 @@ const MAX_BODY_BYTES = 50 * 1024; // 50KB
 export class HttpRequestTool implements IMetonaTool {
   readonly definition: MetonaToolDef = {
     name: 'http_request',
-    description: 'Send an HTTP/REST API request. Supports GET/POST/PUT/PATCH/DELETE/HEAD methods with custom headers and body. Response body is truncated to 50KB.',
+    description:
+      'Send an HTTP/REST API request. Supports GET/POST/PUT/PATCH/DELETE/HEAD methods with custom headers and body. Response body is truncated to 50KB.',
     parameters: {
       type: 'object',
       properties: {
@@ -64,7 +69,10 @@ export class HttpRequestTool implements IMetonaTool {
         },
         headers: { type: 'object', description: 'Request headers as key-value pairs' },
         body: { type: 'string', description: 'Request body (string)' },
-        timeout: { type: 'number', description: 'Timeout in milliseconds (default 30000, max 60000)' },
+        timeout: {
+          type: 'number',
+          description: 'Timeout in milliseconds (default 30000, max 60000)',
+        },
       },
       required: ['url'],
     },
@@ -102,15 +110,12 @@ export class HttpRequestTool implements IMetonaTool {
         };
       }
 
-      // 超时控制
-      const controller = new AbortController();
-      const timer = setTimeout(() => controller.abort(), timeout);
-
-      try {
+      // 超时控制由 ssrfPinnedFetch 内部管理（超时 → ETIMEDOUT；
+      // 工具执行层的 abort signal 经 context 传入 registry 兜底）
+      {
         const fetchOptions: RequestInit = {
           method,
           headers,
-          signal: controller.signal,
           // #10 修复: 禁用自动重定向跟随 — 防止重定向到内网地址绕过 SSRF 校验
           // 重定向后的 URL 由用户自行处理（响应中会包含 Location 头）
           redirect: 'manual',
@@ -120,7 +125,9 @@ export class HttpRequestTool implements IMetonaTool {
           fetchOptions.body = body;
         }
 
-        const response = await fetch(url, fetchOptions);
+        // v0.7.3 P2-1: pinned fetch —— 校验通过的 IP pin 到连接层，
+        // 关闭校验-连接之间的 DNS rebinding 窗口
+        const response = await ssrfPinnedFetch(url, fetchOptions, timeout);
         const text = await response.text();
 
         // 截断到 50KB
@@ -144,14 +151,14 @@ export class HttpRequestTool implements IMetonaTool {
           body: safeBody,
           truncated,
           ok: response.ok,
-          success: true,  // v0.3.1 修复 WARN-4: 成功路径添加 success 字段
+          success: true, // v0.3.1 修复 WARN-4: 成功路径添加 success 字段
         };
-      } finally {
-        clearTimeout(timer);
       }
     } catch (error) {
-      // 区分超时（AbortError）与其他网络错误
-      if (error instanceof Error && error.name === 'AbortError') {
+      // 区分超时与其他网络错误：AbortError（外部中断）与
+      // ETIMEDOUT（ssrfPinnedFetch 超时转译，v0.7.3 P2-1）均归为超时语义
+      const err = error as Error & { code?: string };
+      if (err?.name === 'AbortError' || err?.code === 'ETIMEDOUT') {
         return { error: 'Request timeout', success: false };
       }
       const errMsg = error instanceof Error ? error.message : String(error);
diff --git a/electron/harness/tools/built-in/network-utils.ts b/electron/harness/tools/built-in/network-utils.ts
index 2aed309..01af136 100644
--- a/electron/harness/tools/built-in/network-utils.ts
+++ b/electron/harness/tools/built-in/network-utils.ts
@@ -34,7 +34,8 @@ export const UA_POOL = [
   'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0',
 ];
 
-export const MOBILE_UA = 'Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.1';
+export const MOBILE_UA =
+  'Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.1';
 
 export const ACCEPT_LANGUAGE_POOL = [
   'zh-CN,zh;q=0.9,en;q=0.8',
@@ -54,21 +55,25 @@ export function buildAntiCrawlHeaders(
   const userAgent = mobileUA ? MOBILE_UA : UA_POOL[uaIdx];
 
   let origin = '';
-  try { origin = new URL(url).origin; } catch { /* ignore */ }
+  try {
+    origin = new URL(url).origin;
+  } catch {
+    /* ignore */
+  }
 
   return {
     'User-Agent': userAgent,
-    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8',
+    Accept: 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8',
     'Accept-Language': ACCEPT_LANGUAGE_POOL[langIdx],
     'Accept-Encoding': 'gzip, deflate, br',
     'Cache-Control': 'no-cache',
-    'DNT': '1',
-    'Referer': origin || '',
+    DNT: '1',
+    Referer: origin || '',
     'Sec-Fetch-Dest': 'document',
     'Sec-Fetch-Mode': 'navigate',
     'Sec-Fetch-Site': 'none',
     'Sec-Fetch-User': '?1',
-    'Pragma': 'no-cache',
+    Pragma: 'no-cache',
   };
 }
 
@@ -107,7 +112,15 @@ export function normalizeUrl(url: string): string {
     const u = new URL(url);
 
     // 去除追踪参数
-    const trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'gclid', 'fbclid'];
+    const trackingParams = [
+      'utm_source',
+      'utm_medium',
+      'utm_campaign',
+      'utm_term',
+      'utm_content',
+      'gclid',
+      'fbclid',
+    ];
     for (const p of trackingParams) u.searchParams.delete(p);
 
     // H-6 增强: 排序查询参数（确保参数顺序一致，便于去重）
@@ -125,7 +138,7 @@ export function normalizeUrl(url: string): string {
       (u.protocol === 'https:' && u.port === '443') ||
       (u.protocol === 'ws:' && u.port === '80') ||
       (u.protocol === 'wss:' && u.port === '443');
-    const portSuffix = isDefaultPort ? '' : (u.port ? `:${u.port}` : '');
+    const portSuffix = isDefaultPort ? '' : u.port ? `:${u.port}` : '';
 
     // 强制小写 host
     return `${u.protocol}//${u.hostname.toLowerCase()}${portSuffix}${path}${u.search}${u.hash}`;
@@ -158,47 +171,68 @@ export function isInterceptedPage(html: string): boolean {
 // ===== HTML → 纯文本转换 =====
 
 const HTML_ENTITY_MAP: Record<string, string> = {
-  '&nbsp;': ' ', '&lt;': '<', '&gt;': '>', '&amp;': '&', '&quot;': '"',
-  '&apos;': "'", '&hellip;': '…', '&mdash;': '—', '&ndash;': '–',
-  '&laquo;': '«', '&raquo;': '»', '&times;': '×', '&divide;': '÷',
-  '&copy;': '©', '&reg;': '®', '&trade;': '™', '&euro;': '€',
-  '&pound;': '£', '&yen;': '¥', '&cent;': '¢', '&deg;': '°',
+  '&nbsp;': ' ',
+  '&lt;': '<',
+  '&gt;': '>',
+  '&amp;': '&',
+  '&quot;': '"',
+  '&apos;': "'",
+  '&hellip;': '…',
+  '&mdash;': '—',
+  '&ndash;': '–',
+  '&laquo;': '«',
+  '&raquo;': '»',
+  '&times;': '×',
+  '&divide;': '÷',
+  '&copy;': '©',
+  '&reg;': '®',
+  '&trade;': '™',
+  '&euro;': '€',
+  '&pound;': '£',
+  '&yen;': '¥',
+  '&cent;': '¢',
+  '&deg;': '°',
 };
 
 export function htmlToText(html: string): string {
-  return html
-    // 移除噪声标签及内容
-    .replace(/<script[^>]*>[\s\S]*?<\/script>/gi, '')
-    .replace(/<style[^>]*>[\s\S]*?<\/style>/gi, '')
-    .replace(/<noscript[^>]*>[\s\S]*?<\/noscript>/gi, '')
-    .replace(/<nav[^>]*>[\s\S]*?<\/nav>/gi, '')
-    .replace(/<header[^>]*>[\s\S]*?<\/header>/gi, '')
-    .replace(/<footer[^>]*>[\s\S]*?<\/footer>/gi, '')
-    .replace(/<aside[^>]*>[\s\S]*?<\/aside>/gi, '')
-    .replace(/<iframe[^>]*>[\s\S]*?<\/iframe>/gi, '')
-    .replace(/<svg[^>]*>[\s\S]*?<\/svg>/gi, '')
-    // 移除 HTML 注释
-    .replace(/<!--[\s\S]*?-->/g, '')
-    // 块级标签转换行
-    .replace(/<\/?(p|div|h[1-6]|li|tr|blockquote|section|article|pre|br|hr)[^>]*>/gi, '\n')
-    // 表格单元格转制表符
-    .replace(/<\/?(td|th)[^>]*>/gi, '\t')
-    // 移除剩余标签
-    .replace(/<[^>]+>/g, '')
-    // 解码 HTML 实体
-    .replace(/&#(\d+);/g, (_, n) => String.fromCharCode(Number(n)))
-    .replace(/&#x([0-9a-f]+);/gi, (_, h) => String.fromCharCode(parseInt(h, 16)))
-    .replace(/&[a-z]+;/gi, (m) => HTML_ENTITY_MAP[m.toLowerCase()] ?? m)
-    // 清理空白
-    .replace(/\n{3,}/g, '\n\n')
-    .replace(/[ \t]+/g, ' ')
-    .replace(/^[ \t]+/gm, '')
-    .trim();
+  return (
+    html
+      // 移除噪声标签及内容
+      .replace(/<script[^>]*>[\s\S]*?<\/script>/gi, '')
+      .replace(/<style[^>]*>[\s\S]*?<\/style>/gi, '')
+      .replace(/<noscript[^>]*>[\s\S]*?<\/noscript>/gi, '')
+      .replace(/<nav[^>]*>[\s\S]*?<\/nav>/gi, '')
+      .replace(/<header[^>]*>[\s\S]*?<\/header>/gi, '')
+      .replace(/<footer[^>]*>[\s\S]*?<\/footer>/gi, '')
+      .replace(/<aside[^>]*>[\s\S]*?<\/aside>/gi, '')
+      .replace(/<iframe[^>]*>[\s\S]*?<\/iframe>/gi, '')
+      .replace(/<svg[^>]*>[\s\S]*?<\/svg>/gi, '')
+      // 移除 HTML 注释
+      .replace(/<!--[\s\S]*?-->/g, '')
+      // 块级标签转换行
+      .replace(/<\/?(p|div|h[1-6]|li|tr|blockquote|section|article|pre|br|hr)[^>]*>/gi, '\n')
+      // 表格单元格转制表符
+      .replace(/<\/?(td|th)[^>]*>/gi, '\t')
+      // 移除剩余标签
+      .replace(/<[^>]+>/g, '')
+      // 解码 HTML 实体
+      .replace(/&#(\d+);/g, (_, n) => String.fromCharCode(Number(n)))
+      .replace(/&#x([0-9a-f]+);/gi, (_, h) => String.fromCharCode(parseInt(h, 16)))
+      .replace(/&[a-z]+;/gi, (m) => HTML_ENTITY_MAP[m.toLowerCase()] ?? m)
+      // 清理空白
+      .replace(/\n{3,}/g, '\n\n')
+      .replace(/[ \t]+/g, ' ')
+      .replace(/^[ \t]+/gm, '')
+      .trim()
+  );
 }
 
 // ===== 流式读取（大文件保护，10MB 上限） =====
 
-export async function readBodyWithLimit(response: Response, maxBytes = 10 * 1024 * 1024): Promise<string> {
+export async function readBodyWithLimit(
+  response: Response,
+  maxBytes = 10 * 1024 * 1024,
+): Promise<string> {
   const contentLength = response.headers.get('content-length');
   if (contentLength && parseInt(contentLength) > maxBytes) {
     throw new Error(`Response too large: ${contentLength} bytes (limit: ${maxBytes})`);
@@ -249,6 +283,40 @@ export function logTool(toolName: string, message: string): void {
   log.info(`[Tool:${toolName}] ${message}`);
 }
 
+// ===== v0.7.3 P2-2: Agent 浏览器 CORS Origin 回显 =====
+
+/**
+ * 计算响应应携带的 Access-Control-Allow-Origin 值（纯函数，表测锁定）。
+ *
+ * 背景：Agent 浏览器专用 session 此前对所有响应注入 ACAO:* —— 任意被 Agent
+ * 打开的第三方页面都能借该分区无差别跨域读取。改为回显请求 Origin（等价能力：
+ * 页面对自己的 Origin 仍可跨域读，如截图所需），无 Origin（同源导航/非浏览器
+ * 客户端）回退 '*' 保持既有能力不回退。
+ *
+ * @param requestOrigin 请求头 Origin（可能为 undefined / 任意字符串）
+ * @returns 应写入响应的 ACAO 值（单元素数组，供 Electron responseHeaders 使用）
+ */
+export function corsAllowOrigin(requestOrigin: string | undefined | null): string[] {
+  const origin = requestOrigin?.trim();
+  if (origin && /^https?:\/\//i.test(origin)) {
+    return [origin];
+  }
+  return ['*'];
+}
+
+/** 从请求头集合中大小写不敏感地提取 Origin 值 */
+export function extractOriginHeader(
+  requestHeaders: Record<string, string | string[] | undefined> | undefined,
+): string | undefined {
+  if (!requestHeaders) return undefined;
+  for (const [key, value] of Object.entries(requestHeaders)) {
+    if (key.toLowerCase() === 'origin') {
+      return Array.isArray(value) ? value[0] : value;
+    }
+  }
+  return undefined;
+}
+
 // ===== v0.6.4 P4-4: HTML → Markdown 转换（web_fetch extract_mode='markdown'） =====
 //
 // v0.6.4 收尾：私有 npm 凭据解锁后，按开发规范第一铁律把第一轮的临时自写实现
@@ -285,11 +353,9 @@ const LIST_LINE = /^\s*(?:- |\d+\. )/;
  * 2. 仅当"空行两侧都是同一列表的条目行"时移除该空行（绝不吞条目、不影响段落间距）。
  */
 function collapseListGaps(markdown: string): string {
-  const lines = markdown.split('\n').map((line) =>
-    line
-      .replace(/^(\s*)- {2,}/, '$1- ')
-      .replace(/^(\s*\d+\.)\s{2,}/, '$1 '),
-  );
+  const lines = markdown
+    .split('\n')
+    .map((line) => line.replace(/^(\s*)- {2,}/, '$1- ').replace(/^(\s*\d+\.)\s{2,}/, '$1 '));
 
   const isListItem = (l: string | undefined): boolean => (l ?? '').length > 0 && LIST_LINE.test(l!);
 
@@ -321,5 +387,7 @@ export function htmlToMarkdown(html: string): string {
     return '';
   }
 
-  return collapseListGaps(md).replace(/\n{3,}/g, '\n\n').trim();
+  return collapseListGaps(md)
+    .replace(/\n{3,}/g, '\n\n')
+    .trim();
 }
diff --git a/electron/harness/tools/built-in/ssrf-dispatcher.ts b/electron/harness/tools/built-in/ssrf-dispatcher.ts
new file mode 100644
index 0000000..9ec8442
--- /dev/null
+++ b/electron/harness/tools/built-in/ssrf-dispatcher.ts
@@ -0,0 +1,170 @@
+/**
+ * SSRF DNS Pinning Dispatcher（v0.7.3 P2-1）
+ *
+ * 关闭 M7 审查确认的 DNS rebinding 窗口：此前 validateSSRF 在校验阶段解析一次
+ * DNS，fetch 实际连接时 undici 再次解析 —— 两次解析之间攻击者可切换 DNS 记录
+ * （TTL=0）把连接导向内网。原注释断言"Node fetch 下无法彻底关闭"，该结论只对
+ * 全局 fetch 成立；主进程已依赖 undici（network-proxy 的 setGlobalDispatcher），
+ * undici 的 Agent 支持 connect.lookup 自定义 —— 校验通过的 IP 集合可精确 pin 到
+ * 连接层，TLS SNI/证书校验仍基于原始域名（undici 将 servername 保持为 hostname）。
+ *
+ * 契约：
+ * - resolvePublicAddresses（ssrf-guard）是校验与地址解析的唯一事实来源，
+ *   本模块 pin 的就是它返回的那批 IP —— 校验与连接同源，无双解析窗口；
+ * - 代理激活（network-proxy.isProxyActive()）时 pinning 不可实现（DNS 在代理端
+ *   解析）且 per-request dispatcher 会旁路用户代理 —— 退化为"仅入口校验"，
+ *   走全局 dispatcher（保持既有语义与代理兼容）；
+ * - fetchWithTimeoutPinned 合并外部 abort signal 与超时控制，语义对齐
+ *   BaseAdapter.fetchWithTimeout（超时 → ETIMEDOUT 可重试；外部中断原样抛出）；
+ * - 每次 pinned 请求构造一次性 Agent 并在 finally 中 close（连接池即用即毁，
+ *   防止把"上一请求的 pin 集合"泄漏给后续请求）。
+ */
+
+import { Agent, fetch as undiciFetch } from 'undici';
+import { isIP } from 'node:net';
+import { resolvePublicAddresses } from './ssrf-guard';
+import { fetchWithTimeout } from './network-utils';
+import { isProxyActive } from '../../../utils/network-proxy';
+import log from 'electron-log';
+
+/** 标准 dns.lookup 回调签名（undici connect.lookup 消费） */
+export type LookupCallback = (
+  err: NodeJS.ErrnoException | null,
+  addresses?: Array<{ address: string; family: number }>,
+) => void;
+
+/** undici connect.lookup 的函数签名形态 */
+export type PinnedLookup = (hostname: string, options: unknown, callback: LookupCallback) => void;
+
+/**
+ * 构造"钉死 IP 集合"的 lookup 函数：无论传入什么 hostname，都只返回校验阶段
+ * 锁定的公网地址（过滤非法 family）。集合为空时返回 ENOTFOUND（防御性——
+ * 调用方在集合为空时不应构造 dispatcher）。
+ */
+export function createPinnedLookup(allowedIps: string[]): PinnedLookup {
+  return (_hostname, _options, callback) => {
+    process.nextTick(() => {
+      const addresses = allowedIps
+        .map((ip) => ({ address: ip, family: isIP(ip) }))
+        .filter((a): a is { address: string; family: number } => a.family === 4 || a.family === 6);
+      if (addresses.length === 0) {
+        const err: NodeJS.ErrnoException = new Error('pinned lookup: no allowed addresses');
+        err.code = 'ENOTFOUND';
+        callback(err, undefined);
+        return;
+      }
+      callback(null, addresses);
+    });
+  };
+}
+
+/**
+ * 校验 URL 并返回 pinning 用的公网 IP 集合。
+ * 校验失败原样抛出（调用方按 SSRF 阻断处理）。
+ */
+export async function resolvePinnedIps(url: string): Promise<string[]> {
+  return resolvePublicAddresses(url);
+}
+
+/**
+ * 带 SSRF pinning 的 fetch（http_request / web_fetch Phase1 / 可达性预检共用）。
+ *
+ * 行为：
+ * 1. 代理激活 → 退化为普通 fetchWithTimeout（仅入口校验语义，见模块注释）；
+ * 2. 否则 → 解析并校验公网 IP → 一次性 undici Agent（pinned lookup）发起请求；
+ * 3. 超时/外部中断语义与 fetchWithTimeout 对齐；
+ * 4. 返回 Response 与全局 fetch 兼容（status/ok/headers/text/url/body）。
+ *
+ * @param url 目标 URL（调用方已保证 http/https；本函数再做一次全量 SSRF 校验）
+ * @param init RequestInit（redirect 等由调用方决定）
+ * @param timeoutMs 请求超时
+ * @param externalSignal 外部 abort 信号（引擎中断透传，可选）
+ */
+export async function ssrfPinnedFetch(
+  url: string,
+  init: RequestInit,
+  timeoutMs: number,
+  externalSignal?: AbortSignal,
+): Promise<Response> {
+  const ips = await resolvePublicAddresses(url);
+
+  // 代理激活：DNS 在代理端解析，pinning 不可实现；走全局 dispatcher 保持代理语义
+  if (isProxyActive()) {
+    return fetchWithTimeout(url, init, timeoutMs);
+  }
+
+  // 外部信号已中止 → 直接抛 AbortError（对齐 fetchWithTimeout 行为）
+  if (externalSignal?.aborted) {
+    const err = new Error('Aborted');
+    err.name = 'AbortError';
+    throw err;
+  }
+
+  const controller = new AbortController();
+  let timedOut = false;
+  const timer = setTimeout(() => {
+    timedOut = true;
+    controller.abort();
+  }, timeoutMs);
+
+  const onExternalAbort = () => controller.abort();
+  if (externalSignal) {
+    externalSignal.addEventListener('abort', onExternalAbort, { once: true });
+  }
+
+  // 一次性 pinned Agent（connect 超时对齐 network-proxy 的 15s 连接上限）
+  const dispatcher = new Agent({
+    connect: { timeout: 15_000, lookup: createPinnedLookup(ips) as never },
+  });
+
+  try {
+    const response = await undiciFetch(url, {
+      ...(init as Record<string, unknown>),
+      signal: controller.signal,
+      dispatcher,
+    } as never);
+    return response as unknown as Response;
+  } catch (err) {
+    const externalAborted = externalSignal?.aborted === true;
+    if (timedOut && !externalAborted) {
+      const timeoutError = new Error(
+        `Request timed out after ${timeoutMs}ms (url=${String(url).slice(0, 120)})`,
+      );
+      (timeoutError as Error & { code: string }).code = 'ETIMEDOUT';
+      throw timeoutError;
+    }
+    throw err;
+  } finally {
+    clearTimeout(timer);
+    if (externalSignal) {
+      externalSignal.removeEventListener('abort', onExternalAbort);
+    }
+    // 一次性 dispatcher 用后即毁（连接池不跨请求复用，防止 pin 集合泄漏）
+    void dispatcher.close().catch((closeErr) => {
+      log.debug(`[SSRFDispatcher] dispatcher close failed: ${(closeErr as Error).message}`);
+    });
+  }
+}
+
+const REDIRECT_STATUS = new Set([301, 302, 303, 307, 308]);
+
+/**
+ * 解析重定向目标（纯函数，表测锁定）。
+ *
+ * @returns 下一跳绝对 URL；非重定向状态/缺失/非法 Location 返回 null
+ *         （表示当前响应即终态或无法跟随，由调用方按既有语义处理）。
+ *          相对 Location 以 currentUrl 为基解析（RFC 7231）。
+ */
+export function resolveRedirectTarget(
+  response: { status: number; headers: { get(name: string): string | null } },
+  currentUrl: string,
+): string | null {
+  if (!REDIRECT_STATUS.has(response.status)) return null;
+  const location = response.headers.get('location');
+  if (!location) return null;
+  try {
+    return new URL(location, currentUrl).toString();
+  } catch {
+    return null;
+  }
+}
diff --git a/electron/harness/tools/built-in/ssrf-guard.ts b/electron/harness/tools/built-in/ssrf-guard.ts
index 6e38748..2773372 100644
--- a/electron/harness/tools/built-in/ssrf-guard.ts
+++ b/electron/harness/tools/built-in/ssrf-guard.ts
@@ -30,21 +30,21 @@ export function isPrivateIP(ip: string): boolean {
   // IPv4 直接检测
   if (isIP(ip) === 4) {
     const parts = ip.split('.').map(Number);
-    if (parts[0] === 127) return true;          // 回环
-    if (parts[0] === 10) return true;           // 内网
+    if (parts[0] === 127) return true; // 回环
+    if (parts[0] === 10) return true; // 内网
     if (parts[0] === 192 && parts[1] === 168) return true; // 内网
     if (parts[0] === 172 && parts[1] >= 16 && parts[1] <= 31) return true; // 内网
-    if (parts[0] === 169 && parts[1] === 254) return true;  // 链路本地（含云元数据）
-    if (parts[0] === 0) return true;            // 0.0.0.0/8
-    if (parts[0] >= 224) return true;           // 组播 + 保留
+    if (parts[0] === 169 && parts[1] === 254) return true; // 链路本地（含云元数据）
+    if (parts[0] === 0) return true; // 0.0.0.0/8
+    if (parts[0] >= 224) return true; // 组播 + 保留
     return false;
   }
 
   // IPv6 检测
   if (isIP(ip) === 6) {
     const lower = ip.toLowerCase();
-    if (lower === '::1') return true;                        // 回环
-    if (lower.startsWith('fe80:')) return true;              // 链路本地
+    if (lower === '::1') return true; // 回环
+    if (lower.startsWith('fe80:')) return true; // 链路本地
     if (lower.startsWith('fc') || lower.startsWith('fd')) return true; // 唯一本地
     // ::ffff: 映射的 IPv4 — 提取 IPv4 部分递归检测
     const v4MappedMatch = lower.match(/::ffff:(\d+\.\d+\.\d+\.\d+)$/);
@@ -57,16 +57,22 @@ export function isPrivateIP(ip: string): boolean {
 }
 
 /**
- * SSRF 校验 — 解析 URL 域名并校验 IP
+ * SSRF 校验 + 公网地址解析（单一事实来源）
+ *
+ * v0.7.3 P2-1 重构：resolvePublicAddresses 承载全部校验逻辑并返回解析出的
+ * 公网 IP 集合；validateSSRF 成为它的"只要不抛错"薄包装。这样 pinning 层
+ * （ssrf-dispatcher）能拿到与校验完全同一批 IP，避免"校验一次解析、连接
+ * 再解析一次"的双解析不一致。
  *
  * 1. 协议白名单：仅允许 http/https
  * 2. hostname 为 IP 时直接检测
  * 3. 域名 — DNS 解析后检测所有 IP；任意一个 IP 为私有即拒绝
  *    （防止 DNS rebinding 中只校验第一个 IP 的绕过）
  *
+ * @returns 校验通过的全部公网 IP（供 DNS pinning 使用）
  * @throws 如果 URL 指向私有/内网/回环地址或协议不被允许
  */
-export async function validateSSRF(url: string): Promise<void> {
+export async function resolvePublicAddresses(url: string): Promise<string[]> {
   let parsed: URL;
   try {
     parsed = new URL(url);
@@ -86,7 +92,7 @@ export async function validateSSRF(url: string): Promise<void> {
     if (isPrivateIP(hostname)) {
       throw new Error(`Blocked SSRF: ${hostname} is a private/loopback address`);
     }
-    return;
+    return [hostname];
   }
 
   // 域名 — DNS 解析后检测所有 IP
@@ -94,22 +100,39 @@ export async function validateSSRF(url: string): Promise<void> {
   try {
     addresses = await lookup(hostname, { all: true });
   } catch (err) {
-    throw new Error(`Blocked SSRF: DNS resolution failed for ${hostname}: ${(err as Error).message}`);
+    throw new Error(
+      `Blocked SSRF: DNS resolution failed for ${hostname}: ${(err as Error).message}`,
+    );
   }
 
   if (addresses.length === 0) {
     throw new Error(`Blocked SSRF: no DNS records for ${hostname}`);
   }
 
+  const publicIps: string[] = [];
   for (const { address } of addresses) {
     if (isPrivateIP(address)) {
       throw new Error(`Blocked SSRF: ${hostname} resolves to private IP ${address}`);
     }
+    publicIps.push(address);
   }
+  return publicIps;
+}
+
+/**
+ * SSRF 校验 — 解析 URL 域名并校验 IP（v0.7.3 起为 resolvePublicAddresses 的
+ * "仅校验不取值"包装，校验逻辑单一来源在后者）
+ *
+ * @throws 如果 URL 指向私有/内网/回环地址或协议不被允许
+ */
+export async function validateSSRF(url: string): Promise<void> {
+  await resolvePublicAddresses(url);
 }
 
 /** validateSSRF 的不抛错包装：返回结构化结果供工具 execute 直接 return */
-export async function safeValidateSSRF(url: string): Promise<{ ok: true } | { ok: false; error: string }> {
+export async function safeValidateSSRF(
+  url: string,
+): Promise<{ ok: true } | { ok: false; error: string }> {
   try {
     await validateSSRF(url);
     return { ok: true };
diff --git a/electron/harness/tools/built-in/web-fetch.ts b/electron/harness/tools/built-in/web-fetch.ts
index e52855e..d53772b 100644
--- a/electron/harness/tools/built-in/web-fetch.ts
+++ b/electron/harness/tools/built-in/web-fetch.ts
@@ -18,7 +18,6 @@ import { MetonaToolCategory, MetonaRiskLevel } from '../../../harness/types';
 import {
   fetchCache,
   buildAntiCrawlHeaders,
-  fetchWithTimeout,
   htmlToText,
   isInterceptedPage,
   readBodyWithLimit,
@@ -30,14 +29,21 @@ import { getBrowserManager } from './browser';
 // v0.6.4 P2-2 根治安全不对称：web_fetch 此前完全没有 SSRF 校验（仅协议检查）且
 // requiresPermission:false —— LLM 可直接抓取 http://127.0.0.1:<port>、
 // http://169.254.169.254/latest/meta-data 等内网/云元数据地址，浏览器回退通道
-// 同样可达内网。现复用共享 ssrf-guard 模块（与 http_request 同源同行为）：
-// 入口校验 + HTTP 重定向终态 URL 复检（堵 redirect:'follow' 绕道内网的口子）。
+// 同样可达内网。现复用共享 ssrf-guard 模块（与 http_request 同源同行为）。
+// v0.7.3 P2-1 根治: 抓取层升级为 ssrfPinnedFetch —— 校验通过的 IP 集合 pin 到
+// 连接层（undici connect.lookup），关闭校验-连接之间的 DNS rebinding 窗口；
+// 重定向改为逐跳手动跟随，每一跳都先校验后连接（原 redirect:'follow' 下
+// 中间跳转在"终态复检"之前已真实发出，可触达内网）。
 import { validateSSRF } from './ssrf-guard';
+import { resolveRedirectTarget, ssrfPinnedFetch } from './ssrf-dispatcher';
 
 // ===== 跳过重试的状态码 =====
 
 const SKIP_RETRY_STATUS = new Set([403, 429, 502, 503]);
 
+/** v0.7.3 P2-1: 单次抓取允许的最大重定向跳数（每跳均经校验 + pinning） */
+const MAX_REDIRECT_HOPS = 5;
+
 // ===== WebFetchTool =====
 
 export class WebFetchTool implements IMetonaTool {
@@ -188,25 +194,55 @@ export class WebFetchTool implements IMetonaTool {
     for (let attempt = 0; attempt < maxRetries; attempt++) {
       try {
         const headers = buildAntiCrawlHeaders(url, attempt, mobileUA);
-        const response = await fetchWithTimeout(url, { headers, redirect: 'follow' }, 20_000);
 
-        // v0.6.4 P2-2: 重定向终态复检 —— redirect:'follow' 下 fetch 可能跟随跳转
-        // 到与入口校验不同的目标；SSRF 校验 initial URL 后再对 response.url（终态）
-        // 复检，堵住"外网跳内网"绕道。终态指向私有地址时按拦截处理转入浏览器通道
-        // 也会被浏览器侧域名校验拒绝。
-        if (response.url && response.url !== url) {
-          try {
-            await validateSSRF(response.url);
-          } catch (ssrfErr) {
+        // ===== v0.7.3 P2-1 根治: 手动逐跳重定向 + 每跳 SSRF 校验 + DNS pinning =====
+        // 原 redirect:'follow' 下 undici 在内核自动跟跳：跳转目标仅在"终态复检"
+        // 时被校验，中间跳转的请求已经真实发出（可触达内网/元数据地址）。
+        // 现改为逐跳手动跟随：每跳由 ssrfPinnedFetch 发出（校验通过 IP pin 到
+        // 连接层），Location 目标显式校验通过后才允许下一跳；私有地址/非法
+        // 协议目标按 blocked 语义立即终止（禁止重试与浏览器回退）。
+        let currentUrl = url;
+        let response: Response | null = null;
+        let redirectBlocked: string | null = null;
+
+        for (let hop = 0; hop <= MAX_REDIRECT_HOPS; hop++) {
+          response = await ssrfPinnedFetch(currentUrl, { headers, redirect: 'manual' }, 20_000);
+          const next = resolveRedirectTarget(response, currentUrl);
+          if (next === null) break; // 非重定向（或无/非法 Location）—— 当前响应即终态
+          if (hop === MAX_REDIRECT_HOPS) {
             return {
               success: false,
               html: '',
               text: '',
               intercepted: false,
-              blocked: true,
-              reason: `Redirect target blocked by SSRF guard: ${(ssrfErr as Error).message}`,
+              reason: `Too many redirects (>${MAX_REDIRECT_HOPS})`,
             };
           }
+          // 下一跳目标显式校验（ssrfPinnedFetch 内部还会再次校验+pinning；
+          // 这里提前拦截以保证 blocked 语义：不重试、不进浏览器回退）
+          try {
+            await validateSSRF(next);
+          } catch (ssrfErr) {
+            redirectBlocked = `Redirect target blocked by SSRF guard: ${(ssrfErr as Error).message}`;
+            break;
+          }
+          currentUrl = next;
+          response = null; // 丢弃中间跳转响应，下一跳重新抓取
+        }
+
+        if (redirectBlocked) {
+          return {
+            success: false,
+            html: '',
+            text: '',
+            intercepted: false,
+            blocked: true,
+            reason: redirectBlocked,
+          };
+        }
+        if (!response) {
+          // 防御性：循环正常结束必然携带终态响应
+          return { success: false, html: '', text: '', intercepted: false, reason: 'No response' };
         }
 
         // 跳过重试的状态码 → 直接进入浏览器回退
diff --git a/electron/harness/tools/built-in/web-search.ts b/electron/harness/tools/built-in/web-search.ts
index f405d7c..70260cb 100644
--- a/electron/harness/tools/built-in/web-search.ts
+++ b/electron/harness/tools/built-in/web-search.ts
@@ -26,6 +26,9 @@ import {
   buildSearXNGAuthHeaders,
   logTool,
 } from './network-utils';
+// v0.7.3 P2-1: 可达性预检经 SSRF 校验 + DNS pinning（结果 URL 是不可信外部输入）
+import { safeValidateSSRF } from './ssrf-guard';
+import { ssrfPinnedFetch } from './ssrf-dispatcher';
 import type { WebFetchTool } from './web-fetch';
 
 // ===== 类型定义 =====
@@ -330,6 +333,10 @@ function parse360Regex(html: string): SearchResult[] {
 }
 
 // ===== 可达性预检 =====
+// v0.7.3 P2-1: 可达性预检的 URL 来自不可信的搜索结果 —— HEAD 探测同样不得
+// 触达内网/元数据地址。校验失败的 URL 直接标记不可达（不发起任何请求）；
+// 探测经 ssrfPinnedFetch（DNS pinning），重定向不自动跟随（3xx 即视为可达 ——
+// 链接活性已证明，且跟跳目标不再绕过校验）。
 
 async function checkReachability(urls: string[], concurrency = 5): Promise<Map<string, boolean>> {
   const result = new Map<string, boolean>();
@@ -337,8 +344,13 @@ async function checkReachability(urls: string[], concurrency = 5): Promise<Map<s
     const batch = urls.slice(i, i + concurrency);
     const checks = batch.map(async (url) => {
       try {
-        const resp = await fetchWithTimeout(url, { method: 'HEAD', redirect: 'follow' }, 3_000);
-        result.set(url, resp.ok);
+        const ssrf = await safeValidateSSRF(url);
+        if (!ssrf.ok) {
+          result.set(url, false);
+          return;
+        }
+        const resp = await ssrfPinnedFetch(url, { method: 'HEAD', redirect: 'manual' }, 3_000);
+        result.set(url, resp.ok || (resp.status >= 300 && resp.status < 400));
       } catch {
         result.set(url, false);
       }
diff --git a/electron/harness/types/metona-adapter.ts b/electron/harness/types/metona-adapter.ts
index 1f957c4..8df57d0 100644
--- a/electron/harness/types/metona-adapter.ts
+++ b/electron/harness/types/metona-adapter.ts
@@ -30,6 +30,13 @@ export interface MetonaModelInfo {
   supportsToolCalling?: boolean;
   /** 是否支持 Thinking / Reasoning */
   supportsThinking?: boolean;
+  /**
+   * 是否支持视觉（图片输入）— v0.7.3 P1-4。
+   * undefined 表示未知（调用方保守放行，保持可用性）；
+   * Ollama /api/show capabilities 探测成功时为真实布尔值，
+   * 供前端上传入口拒绝不支持图片的本地语言模型。
+   */
+  supportsVision?: boolean;
   /** 模型描述 */
   description?: string;
 }
diff --git a/electron/ipc/__tests__/agent.test.ts b/electron/ipc/__tests__/agent.test.ts
index 07c7004..4a84da7 100644
--- a/electron/ipc/__tests__/agent.test.ts
+++ b/electron/ipc/__tests__/agent.test.ts
@@ -37,7 +37,8 @@ import type { MetonaMessage } from '../../harness/types';
 function makeEngineMock(overrides: Record<string, unknown> = {}) {
   return {
     runStream: vi.fn().mockResolvedValue({
-      finalAnswer: '这是最终回答',
+      // v0.7.3 P1-5: 固化门控要求回答 >= minChars（默认 200）—— mock 回答扩到阈值之上
+      finalAnswer: '这是最终回答' + '补充细节。'.repeat(60),
       terminationReason: 'completed',
       iterations: [
         {
@@ -140,6 +141,8 @@ function makeCtx(overrides: Record<string, unknown> = {}) {
     // v0.5.1: abortByParent 返回 taskId[]（abortSession 据此清理 SubAgent pending 确认）
     orchestrator: Object.assign(new EventEmitter(), { abortByParent: vi.fn(() => []) }),
     confirmationHook: { clearPending: vi.fn() },
+    // v0.7.3 P4-1: 会话标题生成器接线（sendMessage 完成路径消费）
+    titleGenerator: { maybeGenerateTitle: vi.fn().mockResolvedValue(null) },
     reloadAdapter: vi.fn(() => true),
     ...overrides,
   };
@@ -266,10 +269,13 @@ describe('agent:sendMessage — 成功路径', () => {
         sessionId: 'sess_1',
       }),
     );
-    // 2. 引擎启动（每会话引擎）
+    // 2. 引擎启动（每会话引擎）—— v0.7.3 P1-1: 引擎收到带上下文前置块的消息副本
     expect(ctxRaw.agentEngineManager.getEngine).toHaveBeenCalledWith('sess_1');
     expect(engine.runStream).toHaveBeenCalledWith(
-      VALID_MESSAGE,
+      expect.objectContaining({
+        role: 'user',
+        content: expect.stringContaining(String(VALID_MESSAGE.content)),
+      }),
       'sess_1',
       [],
       expect.objectContaining({ roleDefinition: 'role' }),
@@ -292,7 +298,10 @@ describe('agent:sendMessage — 成功路径', () => {
     );
     expect(ctxRaw.sessionRecorder.stopRecording).toHaveBeenCalled();
     // 7. 输出验证执行
-    expect(ctxRaw.outputValidator.validate).toHaveBeenCalledWith('这是最终回答', expect.anything());
+    expect(ctxRaw.outputValidator.validate).toHaveBeenCalledWith(
+      expect.stringContaining('这是最终回答'),
+      expect.anything(),
+    );
     // 8. 摘要评估（异步触发）
     await vi.waitFor(() =>
       expect(ctxRaw.sessionSummaryService.maybeSummarize).toHaveBeenCalledWith('sess_1'),
@@ -301,7 +310,7 @@ describe('agent:sendMessage — 成功路径', () => {
     await vi.waitFor(() => expect(ctxRaw.memoryConsolidator.consolidate).toHaveBeenCalled());
   });
 
-  it('注入相关记忆到 System Prompt 动态区', async () => {
+  it('注入相关记忆到用户消息上下文前置块（P1-1：system 保持缓存稳定）', async () => {
     const { ctx, ctxRaw } = makeCtx({
       memoryManager: {
         search: vi.fn(() => [
@@ -321,9 +330,16 @@ describe('agent:sendMessage — 成功路径', () => {
 
     await handler(null, VALID_MESSAGE, 'sess_1');
     expect(ctxRaw.memoryManager.search).toHaveBeenCalled();
-    // 引擎收到的 systemPrompt 应包含记忆块
+    // P1-1: 记忆注入迁移到首条 user 消息前置块（system 跨 run 字节稳定 → 缓存命中）
     const prompt = engine_runStreamPrompt(ctxRaw);
-    expect(prompt.dynamicReminders).toContain('用户偏好深色主题');
+    expect(prompt.dynamicReminders).not.toContain('用户偏好深色主题');
+    const userMessage = engine_runStreamUserMessage(ctxRaw);
+    expect(userMessage.content).toContain('[Contextual information for this message');
+    expect(userMessage.content).toContain('用户偏好深色主题');
+    // DB 持久化仍使用原始干净内容（前置块只存在于引擎副本）
+    expect(ctxRaw.sessionService.saveMessage).toHaveBeenCalledWith(
+      expect.objectContaining({ content: VALID_MESSAGE.content }),
+    );
   });
 
   it('验证发现 warning 级问题时广播 VALIDATION 流事件', async () => {
@@ -406,6 +422,14 @@ describe('agent:abortSession — 中断编排', () => {
   });
 });
 
+/** 从 runStream 调用参数中提取首条用户消息（P1-1 前置块断言用） */
+function engine_runStreamUserMessage(ctxRaw: Record<string, unknown>): { content: string } {
+  const engine = (ctxRaw.agentEngineManager as unknown as { getEngine: Mock }).getEngine() as {
+    runStream: Mock;
+  };
+  return engine.runStream.mock.calls[0][0];
+}
+
 /** 从 runStream 调用参数中提取 systemPrompt */
 function engine_runStreamPrompt(ctxRaw: Record<string, unknown>): {
   roleDefinition: string;
diff --git a/electron/ipc/__tests__/sessions-tools-config.test.ts b/electron/ipc/__tests__/sessions-tools-config.test.ts
index 7e346ec..16d4edc 100644
--- a/electron/ipc/__tests__/sessions-tools-config.test.ts
+++ b/electron/ipc/__tests__/sessions-tools-config.test.ts
@@ -65,7 +65,7 @@ describe('sessions 域 — 参数校验矩阵', () => {
         getMessages: vi.fn(() => []),
         pin: vi.fn(() => true),
         archive: vi.fn(() => true),
-        deleteMessage: vi.fn(() => true),
+        // v0.7.3 P1-3: sessions:deleteMessage 死通道已删除，service 方法一并移除
         clearMessages: vi.fn(),
         truncateMessagesAfter: vi.fn(() => true),
         searchMessages: vi.fn(() => []),
diff --git a/electron/ipc/agent.ts b/electron/ipc/agent.ts
index fc11f06..0b7ed25 100644
--- a/electron/ipc/agent.ts
+++ b/electron/ipc/agent.ts
@@ -19,8 +19,24 @@ import { MetonaErrorCode, MetonaStreamEventType } from '../harness/types';
 import { estimateMessagesTokens } from '../harness/utils/token-estimator';
 import { DeepSeekAdapter } from '../harness/adapters/deepseek.adapter';
 import { OllamaAdapter } from '../harness/adapters/ollama.adapter';
+// v0.7.3 P1-1: 用户上下文前置块（动态内容出 system，保 prompt cache 前缀稳定）
+import { buildUserContextPrefix, withUserContextPrefix } from '../harness/prompts/user-context';
+// v0.7.3 P1-5: 记忆固化触发决策（纯函数）
+import { shouldConsolidate } from '../harness/memory/consolidation-policy';
 import log from 'electron-log';
 
+/** 构建 "时区名 (UTC±N)" 标签（注入用户上下文前置块；失败回退 UTC） */
+function buildTimezoneLabel(): string {
+  try {
+    const tz = Intl.DateTimeFormat().resolvedOptions().timeZone ?? 'UTC';
+    const offset = -new Date().getTimezoneOffset() / 60;
+    const offsetStr = offset >= 0 ? `UTC+${offset}` : `UTC${offset}`;
+    return `${tz} (${offsetStr})`;
+  } catch {
+    return 'UTC';
+  }
+}
+
 /** 单会话的 text_delta 节流状态 */
 interface ThrottleState {
   buffer: string;
@@ -56,12 +72,16 @@ export function registerAgentHandlers(ctx: IPCContext): void {
     sessionSummaryService,
     orchestrator,
     confirmationHook,
+    titleGenerator,
   } = ctx;
 
   // ===== 常驻事件管道：text_delta 按会话节流（F8） =====
   const throttleStates = new Map<string, ThrottleState>();
   const iterationTraces = new Map<string, IterationTrace>();
 
+  // v0.7.3 P1-5: 会话级记忆固化时间戳（consolidation-policy 频率门控的状态持有方）
+  const lastConsolidationBySession = new Map<string, number>();
+
   const flushThrottle = (sessionId: string): void => {
     const st = throttleStates.get(sessionId);
     if (!st) return;
@@ -411,59 +431,46 @@ export function registerAgentHandlers(ctx: IPCContext): void {
         });
       }
 
-      // 检索与用户消息相关的记忆，注入到 System Prompt 动态区
+      // 检索与用户消息相关的记忆 + 附件元信息 → 构建用户消息上下文前置块。
+      // v0.7.3 P1-1 根治: 记忆注入与附件提示此前追加进 systemPrompt.dynamicReminders，
+      // 每条消息都改变 system 字节 → 跨 run 缓存全 miss。现随首条 user 消息注入
+      // （LLM 语义等价），system prompt 保持跨 run 字节级稳定。
+      let userContextPrefix = '';
       try {
         const memories = memoryManager.search(userMessage.content, { topK: 5, minImportance: 0.3 });
+        const attachments = (
+          userMessage as MetonaMessage & {
+            attachments?: Array<{ name: string; type: string; truncated?: boolean }>;
+          }
+        ).attachments;
+        userContextPrefix = buildUserContextPrefix({
+          now: Date.now(),
+          memories,
+          attachments: Array.isArray(attachments) ? attachments : [],
+          timezoneLabel: buildTimezoneLabel(),
+        });
         if (memories.length > 0) {
-          const memorySection = memories
-            .map(
-              (m, i) =>
-                `[${i + 1}] (${m.type}, 重要度: ${m.importance.toFixed(1)}) ${m.content.slice(0, 200)}`,
-            )
-            .join('\n');
-          const memoryBlock = `## Relevant Memories (Retrieved)\n${memorySection}`;
-          systemPrompt.dynamicReminders = systemPrompt.dynamicReminders
-            ? `${systemPrompt.dynamicReminders}\n\n---\n\n${memoryBlock}`
-            : memoryBlock;
-          log.debug(`[AGENT] Injected ${memories.length} memories into system prompt`);
+          log.debug(`[AGENT] Injected ${memories.length} memories into user context prefix`);
         }
       } catch (err) {
         log.warn('[AGENT] Memory retrieval failed, proceeding without memories:', err);
+        // 记忆检索失败时前置块退化为仅含日期时间（附件提示随之丢失可接受——
+        // 主进程附件提示是辅助语义，附件内容本体仍在消息中）
+        userContextPrefix = buildUserContextPrefix({
+          now: Date.now(),
+          memories: [],
+          attachments: [],
+          timezoneLabel: buildTimezoneLabel(),
+        });
       }
 
-      // 附件提示注入：用户直接上传的文件/图片，避免 LLM 误以为需要在工作空间查找
-      const attachments = (
-        userMessage as MetonaMessage & { attachments?: Array<{ name: string; type: string }> }
-      ).attachments;
-      if (Array.isArray(attachments) && attachments.length > 0) {
-        const attachmentList = attachments
-          .map((att, i) => {
-            const typeLabel =
-              att.type === 'image' ? 'image' : att.type === 'text' ? 'text file' : 'file';
-            // v0.7.2 A5: 文本附件被上传入口截断（512KB 上限）时，明确告知 LLM 内容不完整，
-            // 防止模型把残缺内容当作完整文件事实
-            const truncatedNote =
-              (att as { truncated?: boolean }).truncated === true
-                ? ' (TRUNCATED — only the first 512KB is included; the full content is NOT available)'
-                : '';
-            const note =
-              att.type === 'image'
-                ? 'already provided to you via vision capability — you can SEE it directly, do NOT call view_image or any tool to read it again'
-                : att.type === 'text'
-                  ? `content${truncatedNote} already inlined in the user message, do NOT search in workspace or read it again`
-                  : 'uploaded directly by user, do NOT search in workspace';
-            return `${i + 1}. [${typeLabel}] ${att.name} — ${note}`;
-          })
-          .join('\n');
-
-        const attachmentBlock = `## User Attachments (Direct Upload)\nThe following files were uploaded directly by the user to this conversation. They are inline attachments, NOT workspace files:\n${attachmentList}\n\n**IMPORTANT**: Images listed above are already visible to you in this conversation. Do NOT call \`view_image\`, \`read_file\`, or any file tool to read them — doing so wastes a tool call and may fail (they are not workspace files).`;
-
-        systemPrompt.dynamicReminders = systemPrompt.dynamicReminders
-          ? `${systemPrompt.dynamicReminders}\n\n---\n\n${attachmentBlock}`
-          : attachmentBlock;
-
-        log.debug(`[AGENT] Injected ${attachments.length} attachment hints into system prompt`);
-      }
+      // 构建发送给引擎的用户消息副本 —— 前置块只存在于该副本：
+      // DB 持久化（上方 saveMessage 已用原始内容）、前端展示、记忆固化、
+      // 注入检测均使用原始干净内容，互不污染。
+      const engineUserMessage: MetonaMessage = {
+        ...userMessage,
+        content: withUserContextPrefix(userContextPrefix, userMessage.content),
+      };
 
       try {
         // 提示注入检测（安全模块）
@@ -503,8 +510,9 @@ export function registerAgentHandlers(ctx: IPCContext): void {
         });
 
         // 启动 Agent Loop（P2-10: 每会话独立引擎）
+        // v0.7.3 P1-1: 传入带上下文前置块的消息副本 —— 原始 userMessage 保持干净
         const engine = agentEngineManager.getEngine(sessionId);
-        const output = await engine.runStream(userMessage, sessionId, history, systemPrompt);
+        const output = await engine.runStream(engineUserMessage, sessionId, history, systemPrompt);
 
         // 输出验证（不阻塞响应，仅记录警告）
         // v0.3.0 修复: 传入 toolResults 和 context，启用事实一致性检查和幻觉检测
@@ -624,23 +632,58 @@ export function registerAgentHandlers(ctx: IPCContext): void {
         workspaceService.updateMemoryTimestamp();
 
         // 会话结束：AI 判断本次对话有哪些重要内容需要持久化到 MEMORY.md
-        // 异步执行，不阻塞主流程返回；失败仅记录日志
-        memoryConsolidator
-          .consolidate(userMessage.content, output.finalAnswer, output.iterations)
-          .then((result) => {
-            if (result.appended > 0) {
-              log.info(
-                `[AGENT] Memory consolidated: ${result.appended} entries appended to MEMORY.md`,
-              );
-              broadcast('toast:show', {
-                type: 'info',
-                message: `AI 已将 ${result.appended} 条重要记忆写入 MEMORY.md`,
-              });
-            }
-          })
-          .catch((err) => {
-            log.warn('[AGENT] Memory consolidation failed:', err);
-          });
+        // v0.7.3 P1-5 节流: 此前每次 run 无条件发起固化 LLM 请求，短寒暄同样触发。
+        // 现按 consolidation-policy 决策（总开关 + 内容门控 + 会话级频率窗口）触发；
+        // 异步执行不阻塞主流程返回；失败仅记录日志。
+        const lastConsolidationAt = lastConsolidationBySession.get(sessionId) ?? 0;
+        const hadSuccessfulToolCall = output.iterations.some((step) =>
+          (step.toolResults ?? []).some((r) => r.success),
+        );
+        const decision = shouldConsolidate({
+          enabled: configService.get<boolean>('memory.consolidationEnabled') !== false,
+          answerChars: output.finalAnswer?.length ?? 0,
+          minChars: configService.get<number>('memory.consolidationMinChars') ?? 200,
+          hadSuccessfulToolCall,
+          lastConsolidationAt,
+          now: Date.now(),
+          intervalMs: configService.get<number>('memory.consolidationIntervalMs') ?? 600_000,
+        });
+        if (decision.consolidate) {
+          memoryConsolidator
+            .consolidate(userMessage.content, output.finalAnswer, output.iterations)
+            .then((result) => {
+              if (result.appended > 0) {
+                lastConsolidationBySession.set(sessionId, Date.now());
+                log.info(
+                  `[AGENT] Memory consolidated: ${result.appended} entries appended to MEMORY.md`,
+                );
+                broadcast('toast:show', {
+                  type: 'info',
+                  message: `AI 已将 ${result.appended} 条重要记忆写入 MEMORY.md`,
+                });
+              }
+            })
+            .catch((err) => {
+              log.warn('[AGENT] Memory consolidation failed:', err);
+            });
+        } else {
+          log.debug(`[AGENT] Memory consolidation skipped (${decision.reason})`);
+        }
+
+        // v0.7.3 P4-1: 首个完成的 run 之后生成精炼会话标题（每会话幂等，失败静默）
+        if (output.terminationReason === 'completed') {
+          titleGenerator
+            .maybeGenerateTitle(sessionId, userMessage.content, output.finalAnswer)
+            .then((title) => {
+              if (title) {
+                // 广播重命名结果，前端 Sidebar 实时刷新标题
+                broadcast('config:changed', { key: `session.title.${sessionId}`, value: title });
+              }
+            })
+            .catch(() => {
+              /* 静默 —— 标题失败已有 debug 日志 */
+            });
+        }
 
         // TOOL 层：记录会话结束 / TRACE 层：停止录制
         auditService.logSessionEnd({
@@ -832,8 +875,9 @@ export function registerAgentHandlers(ctx: IPCContext): void {
     // v0.5.0: 按会话清理 — 只拒绝被中断会话的 pending，不影响其他并发会话等待中的确认
     confirmationHook.clearPending(sessionId);
     // v0.5.1: 被中止 SubAgent 的 pending 确认一并拒绝（含 SubAgent 递归派生的孙任务）
+    // v0.7.3 P2-3: 被中止的 SubAgent 是会话终态 —— 用 forgetSession 连决策记忆一并清理
     for (const taskId of abortedTaskIds) {
-      confirmationHook.clearPending(taskId);
+      confirmationHook.forgetSession(taskId);
     }
 
     // TOOL 层：记录中断
@@ -880,6 +924,8 @@ export function registerAgentHandlers(ctx: IPCContext): void {
     });
     subTraces.delete(taskId);
     subMeta.delete(taskId);
+    // v0.7.3 P2-3: SubAgent 终态 —— 决策记忆随任务终结清理（防长期运行泄漏）
+    confirmationHook.forgetSession(taskId);
   };
 
   orchestrator.on(
diff --git a/electron/ipc/app.ts b/electron/ipc/app.ts
index 7a62cb4..e590b45 100644
--- a/electron/ipc/app.ts
+++ b/electron/ipc/app.ts
@@ -34,6 +34,34 @@ export function registerAppHandlers(ctx: IPCContext): void {
     return result;
   });
 
+  // ===== v0.7.3 P3-4: 健康快照（SLO 指标 + 最近健康检查报告）=====
+  ipcMain.handle('app:healthSnapshot', async () => {
+    try {
+      return { success: true, data: ctx.getHealthSnapshot() };
+    } catch (error) {
+      return { success: false, error: (error as Error).message };
+    }
+  });
+
+  // ===== v0.7.3 P3-3: JSONL 录制文件统计与清理（设置页展示 + 手动清理）=====
+  ipcMain.handle('logs:traceStats', async () => {
+    try {
+      return { success: true, data: ctx.sessionRecorder.getRecordingStats() };
+    } catch (error) {
+      return { success: false, error: (error as Error).message };
+    }
+  });
+
+  ipcMain.handle('logs:pruneTraceFiles', async () => {
+    try {
+      const deleted = ctx.sessionRecorder.pruneOldRecordings();
+      log.info(`[LOGS] Manual trace prune: ${deleted} file(s) removed`);
+      return { success: true, data: { deleted } };
+    } catch (error) {
+      return { success: false, error: (error as Error).message };
+    }
+  });
+
   ipcMain.handle('app:openExternal', async (_event, url: unknown) => {
     // M-12 修复: URL 协议白名单校验，防止打开 file:///smb:// 等危险协议
     if (typeof url !== 'string' || !url) {
diff --git a/electron/ipc/context.ts b/electron/ipc/context.ts
index 6dffc4a..128be1c 100644
--- a/electron/ipc/context.ts
+++ b/electron/ipc/context.ts
@@ -23,6 +23,9 @@ import type { ConfirmationHook } from '../harness/hooks/confirmation-hook';
 import type { MemoryConsolidator } from '../harness/memory/consolidator';
 import type { TaskOrchestrator } from '../harness/orchestration/orchestrator';
 import type { SessionSummaryService } from '../services/session-summary.service';
+import type { TitleGenerator } from '../services/title-generator.service';
+import type { HealthChecker } from '../utils/slo';
+import type { SLOMonitor } from '../utils/slo';
 
 /** 工具就绪状态（main.ts 在 MCP 初始化完成后更新，tools.ts 的 isReady 查询读取） */
 export interface ToolsReadyRef {
@@ -30,6 +33,14 @@ export interface ToolsReadyRef {
   toolCount: number;
 }
 
+/** v0.7.3 P3-4: 健康快照载荷（app:healthSnapshot 返回） */
+export interface HealthSnapshot {
+  slo: ReturnType<SLOMonitor['getStatus']>;
+  /** 最近一次健康检查报告；null 表示应用启动后尚未执行过检查（周期 60s） */
+  health: Awaited<ReturnType<HealthChecker['check']>> | null;
+  generatedAt: number;
+}
+
 export interface IPCContext {
   mainWindow: BrowserWindow;
   sessionService: SessionService;
@@ -49,6 +60,10 @@ export interface IPCContext {
   memoryConsolidator: MemoryConsolidator;
   orchestrator: TaskOrchestrator;
   sessionSummaryService: SessionSummaryService;
+  /** v0.7.3 P4-1: 会话标题生成器 */
+  titleGenerator: TitleGenerator;
+  /** v0.7.3 P3-4: 健康快照读取器（SLO + 最近健康检查报告） */
+  getHealthSnapshot: () => HealthSnapshot;
   toolsReadyRef: ToolsReadyRef;
 }
 
diff --git a/electron/ipc/sessions.ts b/electron/ipc/sessions.ts
index 6d5e15a..1532e8e 100644
--- a/electron/ipc/sessions.ts
+++ b/electron/ipc/sessions.ts
@@ -13,7 +13,7 @@ const isValidSessionId = (id: unknown): id is string =>
   typeof id === 'string' && id.length > 0 && id.length <= 200;
 
 export function registerSessionHandlers(ctx: IPCContext): void {
-  const { sessionService } = ctx;
+  const { sessionService, confirmationHook } = ctx;
 
   ipcMain.handle('sessions:list', async () => {
     return sessionService.list();
@@ -34,7 +34,13 @@ export function registerSessionHandlers(ctx: IPCContext): void {
   ipcMain.handle('sessions:delete', async (_event, sessionId: unknown) => {
     // M-34 修复: 校验 sessionId
     if (!isValidSessionId(sessionId)) return { success: false, error: 'Invalid sessionId' };
-    return { success: sessionService.delete(sessionId) };
+    const result = { success: sessionService.delete(sessionId) };
+    // v0.7.3 P2-3: 会话删除 = 会话终态 —— 决策记忆/pending 确认一并清理
+    // （防 rememberedDecisions 随会话数累积泄漏）
+    if (result.success) {
+      confirmationHook.forgetSession(sessionId);
+    }
+    return result;
   });
 
   ipcMain.handle('sessions:getMessages', async (_event, sessionId: unknown) => {
@@ -55,11 +61,9 @@ export function registerSessionHandlers(ctx: IPCContext): void {
     return { success: sessionService.archive(sessionId, archived) };
   });
 
-  ipcMain.handle('sessions:deleteMessage', async (_event, messageId: unknown) => {
-    if (typeof messageId !== 'string' || !messageId)
-      return { success: false, error: 'Invalid messageId' };
-    return { success: sessionService.deleteMessage(messageId) };
-  });
+  // v0.7.3 P1-3: sessions:deleteMessage 已删除 —— 渲染层零调用方（死通道），
+  // 且原实现不回减 sessions.message_count（计数漂移面）。消息删除语义由
+  // sessions:truncateAfter（编辑重发/重新生成）与会话删除级联完整覆盖。
 
   // v0.7.2 A1 根治: 语义修正 —— "清空会话"的成功判定是"操作完成"而非"有行被删除"。
   // 原实现透传 DELETE 影响行数（changes > 0），空会话清空会返回 success:false，
diff --git a/electron/ipc/shared.ts b/electron/ipc/shared.ts
index 9257420..d2ceef0 100644
--- a/electron/ipc/shared.ts
+++ b/electron/ipc/shared.ts
@@ -101,6 +101,11 @@ export function applyEngineConfigKey(ctx: IPCContext, key: string, value: unknow
         thinkingEffort: value as 'low' | 'medium' | 'high' | 'max',
       });
       break;
+    // v0.7.3 P3-1: enableReflection 接线（此前为死配置）— 引擎 REFLECTING 状态开关
+    case 'agent.enableReflection':
+      agentEngineManager.updateConfigAll({ enableReflection: value === true });
+      orchestrator.updateDefaultConfig({ enableReflection: value === true });
+      break;
     case 'agent.toolExecutionTimeoutMs':
       agentEngineManager.updateConfigAll({ toolExecutionTimeoutMs: value as number });
       break;
@@ -202,5 +207,11 @@ export async function applyConfigSideEffects(
     await applySessionProxy(typeof proxyValue === 'string' ? proxyValue : null);
   }
 
+  // v0.7.3 P4-2: MCP 自动重连开关变更 → 即时联动（关闭时取消全部已排程重连）
+  const autoReconnectEntry = entries.find((e) => e.key === 'mcp.autoReconnect');
+  if (autoReconnectEntry) {
+    ctx.mcpManager.setAutoReconnect(autoReconnectEntry.value !== false);
+  }
+
   return null;
 }
diff --git a/electron/main.ts b/electron/main.ts
index e04fda0..74c560e 100644
--- a/electron/main.ts
+++ b/electron/main.ts
@@ -32,6 +32,7 @@ import { WindowManager } from './services/window-manager.service';
 import { MCPManager } from './services/mcp-manager.service';
 import { SessionSummaryService } from './services/session-summary.service';
 import { AgentEngineManager } from './services/agent-engine-manager.service';
+import { TitleGenerator } from './services/title-generator.service';
 import { ContextBuilder } from './harness/prompts/context-builder';
 import { MemoryManager } from './harness/memory/manager';
 import { MemoryConsolidator } from './harness/memory/consolidator';
@@ -317,6 +318,8 @@ async function initialize(): Promise<void> {
   const traceEnabled = configService.get<boolean>('logging.traceEnabled') !== false;
   // SessionRecorder 录制总开关（false 时不写 TRACE JSONL 文件）
   sessionRecorder.setEnabled(traceEnabled);
+  // v0.7.3 P3-3: 启动期清理旧 JSONL 录制文件（按 mtime 保留最近 200 个）
+  void sessionRecorder.pruneOldRecordings();
 
   // ===== v0.2.0: 安全模块（必须在工具注册之前） =====
   const policyEngine = new PolicyEngine();
@@ -426,6 +429,9 @@ async function initialize(): Promise<void> {
           | 'max'
           | null) ?? 'high',
       toolExecutionTimeoutMs: configService.get<number>('agent.toolExecutionTimeoutMs') ?? 120_000,
+      // v0.7.3 P3-1 接线: agent.enableReflection 此前为死配置（引擎读取但全链路
+      // 无置 true 路径）。现注入引擎基线配置，REFLECTING 状态由此开关真实驱动。
+      enableReflection: configService.get<boolean>('agent.enableReflection') === true,
       // F-8 接通: llm.temperature / llm.maxTokens 此前为死配置（引擎硬编码 0.0/63488）
       temperature: configService.get<number>('llm.temperature') ?? 0.0,
       maxTokens: configService.get<number>('llm.maxTokens') ?? 63488,
@@ -490,6 +496,8 @@ async function initialize(): Promise<void> {
   mcpManager.setOnToolsChanged(() => {
     agentEngineManager.setToolsAll(toolRegistry.listTools());
   });
+  // v0.7.3 P4-2: MCP 自动重连开关（默认开启；配置变更经 shared.ts applyConfigSideEffects 联动）
+  mcpManager.setAutoReconnect(configService.get<boolean>('mcp.autoReconnect') !== false);
   const toolsReadyRef: ToolsReadyRef = { ready: false, toolCount: 0 };
   mcpManager
     .initialize()
@@ -542,6 +550,8 @@ async function initialize(): Promise<void> {
           | null) ?? 'high',
       contextLength: ollamaNumCtx ?? undefined,
       contextWindow: buildAdapter().getContextWindow(),
+      // v0.7.3 P3-1: SubAgent 与主引擎同源消费 enableReflection
+      enableReflection: configService.get<boolean>('agent.enableReflection') === true,
     },
   );
   toolRegistry.registerBuiltin(new DelegateTaskTool(orchestrator));
@@ -647,6 +657,56 @@ async function initialize(): Promise<void> {
     }
   };
 
+  // ===== P1-12 + v0.7.3 P3-4: SLO 健康监控接入（提前至窗口创建前，
+  // 使 IPC 侧 getHealthSnapshot 闭包可安全引用 sloMonitor/healthChecker） =====
+  const healthChecker = new HealthChecker(
+    () => db,
+    join(workspaceInfo.path, '.metona', 'agent.db'),
+  );
+  const sloMonitor = new SLOMonitor();
+  agentEngineManager.on('complete', (data: { durationMs: number; terminationReason?: string }) => {
+    sloMonitor.recordRequest(data.durationMs, data.terminationReason === 'completed');
+  });
+  /** 最近一次健康检查报告（供 IPC app:healthSnapshot 展示；初始 null = 尚未检查） */
+  let lastHealthReport: Awaited<ReturnType<HealthChecker['check']>> | null = null;
+  const healthTimer = setInterval(async () => {
+    try {
+      // v0.7.3 P3-1 接线: cleanupExpired 此前零调用方（且 expires_at 无写入方）双重死路。
+      // 现挂入健康检查周期，让过期记忆（episodic_memories.expires_at）真正可回收，
+      // 为后续记忆 TTL 语义预留真实管道；无过期条目时为零开销（一条带索引的 DELETE）。
+      const expired = memoryManager.cleanupExpired();
+      if (expired > 0) {
+        log.info(`[Health] Expired episodic memories purged: ${expired}`);
+      }
+      const report = await healthChecker.check();
+      lastHealthReport = report;
+      if (!report.healthy) {
+        const failed = report.checks
+          .filter((c) => !c.healthy)
+          .map((c) => c.name)
+          .join(', ');
+        log.warn(`[Health] Unhealthy checks: ${failed}`);
+        trayManager?.setStatus('error');
+      } else {
+        // 恢复 idle（运行中状态会被后续 stateChange 覆盖）
+        trayManager?.setStatus('idle');
+      }
+      const slo = sloMonitor.getStatus();
+      if (slo.violated) {
+        log.warn(
+          `[SLO] Burn rate ${slo.burnRate.toFixed(2)} exceeds budget (errorRate=${(slo.errorRate * 100).toFixed(1)}%, ` +
+            `P95=${slo.percentiles['P95'] ?? 0}ms, ${slo.totalRequests} requests)`,
+        );
+      }
+    } catch (err) {
+      log.warn('[Health] Check failed:', err);
+    }
+  }, 60_000);
+  healthTimer.unref?.();
+
+  // ===== v0.7.3 P4-1: 会话标题生成器（首轮 run 完成后 LLM 生成精炼标题） =====
+  const titleGenerator = new TitleGenerator(() => agentEngineManager.getAdapter(), sessionService);
+
   // ===== 窗口管理 =====
   windowManager = new WindowManager();
   // 局部 const 捕获：闭包内 TS 无法对模块级可空变量做流收窄
@@ -682,6 +742,12 @@ async function initialize(): Promise<void> {
           memoryConsolidator,
           orchestrator,
           sessionSummaryService,
+          titleGenerator,
+          getHealthSnapshot: () => ({
+            slo: sloMonitor.getStatus(),
+            health: lastHealthReport,
+            generatedAt: Date.now(),
+          }),
           toolsReadyRef,
         });
       },
@@ -733,42 +799,6 @@ async function initialize(): Promise<void> {
     },
   );
 
-  // ===== P1-12: SLO 健康监控接入（原为死代码，现真实运行） =====
-  const healthChecker = new HealthChecker(
-    () => db,
-    join(workspaceInfo.path, '.metona', 'agent.db'),
-  );
-  const sloMonitor = new SLOMonitor();
-  agentEngineManager.on('complete', (data: { durationMs: number; terminationReason?: string }) => {
-    sloMonitor.recordRequest(data.durationMs, data.terminationReason === 'completed');
-  });
-  const healthTimer = setInterval(async () => {
-    try {
-      const report = await healthChecker.check();
-      if (!report.healthy) {
-        const failed = report.checks
-          .filter((c) => !c.healthy)
-          .map((c) => c.name)
-          .join(', ');
-        log.warn(`[Health] Unhealthy checks: ${failed}`);
-        trayManager?.setStatus('error');
-      } else {
-        // 恢复 idle（运行中状态会被后续 stateChange 覆盖）
-        trayManager?.setStatus('idle');
-      }
-      const slo = sloMonitor.getStatus();
-      if (slo.violated) {
-        log.warn(
-          `[SLO] Burn rate ${slo.burnRate.toFixed(2)} exceeds budget (errorRate=${(slo.errorRate * 100).toFixed(1)}%, ` +
-            `P95=${slo.percentiles['P95'] ?? 0}ms, ${slo.totalRequests} requests)`,
-        );
-      }
-    } catch (err) {
-      log.warn('[Health] Check failed:', err);
-    }
-  }, 60_000);
-  healthTimer.unref?.();
-
   // ===== 应用生命周期 =====
   app.on('window-all-closed', () => {
     // macOS: 保持应用运行（托盘模式）
diff --git a/electron/preload.ts b/electron/preload.ts
index 62bdc61..566bf4d 100644
--- a/electron/preload.ts
+++ b/electron/preload.ts
@@ -57,7 +57,9 @@ const metonaAPI = {
       ipcRenderer.invoke('sessions:pin', sessionId, pinned),
     archive: (sessionId: string, archived: boolean) =>
       ipcRenderer.invoke('sessions:archive', sessionId, archived),
-    deleteMessage: (messageId: string) => ipcRenderer.invoke('sessions:deleteMessage', messageId),
+    // v0.7.3 P1-3: sessions:deleteMessage 死通道已删除 —— 渲染层零调用方，
+    // 且其实现不回减 message_count（计数漂移面）。消息删除语义由
+    // sessions:truncateAfter（编辑重发/重新生成/会话删除级联）完整覆盖。
     clearMessages: (sessionId: string) => ipcRenderer.invoke('sessions:clearMessages', sessionId),
     /** P2-11: 截断消息（编辑重发/重新生成——删除锚点消息之后的所有消息） */
     truncateAfter: (sessionId: string, messageId: string, inclusive?: boolean) =>
@@ -232,6 +234,49 @@ const metonaAPI = {
     // #49 修复: 前端错误上报通道（主进程可注册 'error:report' handler 记录到 electron-log/审计日志）
     // 使用 send（单向）而非 invoke，即使主进程未注册 handler 也不会 reject
     reportError: (payload: unknown) => ipcRenderer.send('error:report', payload),
+    // v0.7.3 P3-4: 健康快照（SLO 指标 + 最近健康检查报告）
+    // 类型以内联形态声明（本文件在 tsconfig.node 域，不引用渲染端 global.d.ts）
+    getHealthSnapshot: () =>
+      ipcRenderer.invoke('app:healthSnapshot') as Promise<{
+        success: boolean;
+        error?: string;
+        data?: {
+          slo: {
+            errorRate: number;
+            throughput: number;
+            avgLatencyMs: number;
+            percentiles: Record<string, number>;
+            burnRate: number;
+            target: number;
+            violated: boolean;
+            totalRequests: number;
+            errorRequests: number;
+            timestamp: string;
+          };
+          health: {
+            healthy: boolean;
+            checks: Array<{ name: string; healthy: boolean; latencyMs?: number; error?: string }>;
+            timestamp: string;
+          } | null;
+          generatedAt: number;
+        };
+      }>,
+  },
+
+  // ===== v0.7.3 P3-3: JSONL 录制文件生命周期（设置页展示/清理） =====
+  logs: {
+    traceStats: () =>
+      ipcRenderer.invoke('logs:traceStats') as Promise<{
+        success: boolean;
+        error?: string;
+        data?: { count: number; totalBytes: number };
+      }>,
+    pruneTraceFiles: () =>
+      ipcRenderer.invoke('logs:pruneTraceFiles') as Promise<{
+        success: boolean;
+        error?: string;
+        data?: { deleted: number };
+      }>,
   },
 
   // ===== 工作空间管理 =====
diff --git a/electron/services/__tests__/mcp-reconnect.test.ts b/electron/services/__tests__/mcp-reconnect.test.ts
new file mode 100644
index 0000000..7a50fed
--- /dev/null
+++ b/electron/services/__tests__/mcp-reconnect.test.ts
@@ -0,0 +1,137 @@
+/**
+ * MCP 自动重连测试（v0.7.3 P4-2）
+ *
+ * R1 nextRetryDelayMs 退避序列（5s/15s/60s，越界钳制）；
+ * R2 连接失败 → 进入 reconnecting 并按退避排程；fake timers 推进后真实重试；
+ * R3 重试耗尽（3 次）→ 停留 error 且不再排程；
+ * R4 disconnectServer（用户显式断开）取消重连排程；
+ * R5 setAutoReconnect(false) 取消全部排程且后续失败不再排程；
+ * R6 连接成功清零计数与排程（connectServer 成功路径经 spy 模拟）。
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+
+vi.mock('electron-log', () => ({
+  default: { info: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn() },
+}));
+
+import { MCPManager, MAX_RECONNECT_ATTEMPTS, nextRetryDelayMs } from '../mcp-manager.service';
+import type { MCPServerConfig } from '../mcp-manager.service';
+import type { ToolRegistry } from '../../harness/tools/registry';
+
+function makeManager(): MCPManager {
+  const fakeDB = {
+    prepare: () => ({ run: () => ({ changes: 0 }) }),
+  } as unknown as ConstructorParameters<typeof MCPManager>[0] extends () => infer D ? D : never;
+  const registry = {
+    registerMCP: vi.fn(() => true),
+    unregisterMCPTools: vi.fn(),
+  } as unknown as ToolRegistry;
+  return new MCPManager(() => fakeDB, registry);
+}
+
+const FAILING_CONFIG: MCPServerConfig = {
+  id: 'mcp_test',
+  name: 'broken-server',
+  // stdio 但缺 command —— connectServer 在构造 transport 前显式抛错（不触网、不 spawn）
+  transport: 'stdio',
+  enabled: true,
+};
+
+describe('nextRetryDelayMs', () => {
+  it('R1: 退避序列 5s/15s/60s，越界钳制', () => {
+    expect(nextRetryDelayMs(1)).toBe(5_000);
+    expect(nextRetryDelayMs(2)).toBe(15_000);
+    expect(nextRetryDelayMs(3)).toBe(60_000);
+    expect(nextRetryDelayMs(4)).toBe(60_000); // 越界钳制到最后一档
+    expect(nextRetryDelayMs(0)).toBe(5_000); // 下界钳制
+  });
+});
+
+describe('MCPManager 自动重连', () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it('R2: 连接失败 → reconnecting 状态 + 定时排程；推进后真实重试', async () => {
+    const manager = makeManager();
+    const connectSpy = vi.spyOn(manager, 'connectServer');
+
+    await expect(manager.connectServer(FAILING_CONFIG)).rejects.toThrow();
+    // 第一次失败后：计数 1，状态 reconnecting，已排程
+    expect(manager.getReconnectInfo('broken-server')).toMatchObject({
+      attempts: 1,
+      scheduled: true,
+    });
+    expect(manager.getServerState('broken-server')?.status).toBe('reconnecting');
+
+    // 推进 5s → 第二次真实重试（同样失败）→ 计数 2
+    connectSpy.mockClear();
+    await vi.advanceTimersByTimeAsync(5_000);
+    expect(connectSpy).toHaveBeenCalledTimes(1);
+    expect(manager.getReconnectInfo('broken-server')).toMatchObject({
+      attempts: 2,
+      scheduled: true,
+    });
+  });
+
+  it('R3: 重试耗尽（3 次）→ 停留 error 且不再排程', async () => {
+    const manager = makeManager();
+    await expect(manager.connectServer(FAILING_CONFIG)).rejects.toThrow();
+
+    // 第 1 次失败后 + 3 次定时重试（每次再失败）
+    await vi.advanceTimersByTimeAsync(5_000);
+    await vi.advanceTimersByTimeAsync(15_000);
+    await vi.advanceTimersByTimeAsync(60_000);
+
+    const info = manager.getReconnectInfo('broken-server');
+    // 耗尽后：排程清空（计数清零后 getReconnectInfo 返回 null 或 scheduled=false）、状态停留 error
+    expect(info?.scheduled ?? false).toBe(false);
+    expect(manager.getServerState('broken-server')?.status).toBe('error');
+    // 再推进也不再有动作
+    const spy = vi.spyOn(manager, 'connectServer');
+    await vi.advanceTimersByTimeAsync(600_000);
+    expect(spy).not.toHaveBeenCalled();
+  });
+
+  it('R4: disconnectServer（用户显式断开）取消重连排程', async () => {
+    const manager = makeManager();
+    await expect(manager.connectServer(FAILING_CONFIG)).rejects.toThrow();
+    expect(manager.getReconnectInfo('broken-server')?.scheduled).toBe(true);
+
+    await manager.disconnectServer('broken-server');
+    // 簿记清空 → getReconnectInfo 返回 null（等价于无排程）
+    expect(manager.getReconnectInfo('broken-server')?.scheduled ?? false).toBe(false);
+    // 状态回落 disconnected
+    expect(manager.getServerState('broken-server')?.status).toBe('disconnected');
+    // 推进时间不再触发重试
+    const spy = vi.spyOn(manager, 'connectServer');
+    await vi.advanceTimersByTimeAsync(600_000);
+    expect(spy).not.toHaveBeenCalled();
+  });
+
+  it('R5: setAutoReconnect(false) 取消全部排程，后续失败不再排程', async () => {
+    const manager = makeManager();
+    await expect(manager.connectServer(FAILING_CONFIG)).rejects.toThrow();
+    expect(manager.getReconnectInfo('broken-server')?.scheduled).toBe(true);
+
+    manager.setAutoReconnect(false);
+    expect(manager.getReconnectInfo('broken-server')?.scheduled ?? false).toBe(false);
+
+    // 关闭后再次失败 → 不排程（簿记清空 → getReconnectInfo 返回 null）
+    await expect(manager.connectServer(FAILING_CONFIG)).rejects.toThrow();
+    expect(manager.getReconnectInfo('broken-server')?.scheduled ?? false).toBe(false);
+    expect(manager.getServerState('broken-server')?.status).toBe('error');
+  });
+
+  it('R6: setAutoReconnect(true)（默认）开启语义 —— 失败必排程', async () => {
+    const manager = makeManager();
+    expect(manager.getReconnectInfo('x')).toBeNull();
+    await expect(manager.connectServer(FAILING_CONFIG)).rejects.toThrow();
+    expect(manager.getReconnectInfo('broken-server')?.scheduled).toBe(true);
+    expect(MAX_RECONNECT_ATTEMPTS).toBe(3);
+  });
+});
diff --git a/electron/services/__tests__/session-recorder.test.ts b/electron/services/__tests__/session-recorder.test.ts
index ad69daf..6edbea6 100644
--- a/electron/services/__tests__/session-recorder.test.ts
+++ b/electron/services/__tests__/session-recorder.test.ts
@@ -249,3 +249,61 @@ describe('SessionRecorder — 总开关与缓冲上限', () => {
     expect(recorder.getFilePath('s1')).toBeNull();
   });
 });
+
+// ===== v0.7.3 P3-3: JSONL 录制文件生命周期（stats + prune） =====
+
+describe('SessionRecorder — 录制文件统计与清理（P3-3）', () => {
+  const writeRecording = async (name: string, ageHours: number): Promise<void> => {
+    const fs = await import('node:fs');
+    const logsDir = join(wsRoot, 'logs');
+    if (!existsSync(logsDir)) fs.mkdirSync(logsDir, { recursive: true });
+    const filePath = join(logsDir, name);
+    fs.writeFileSync(filePath, '{"event":"session_start"}\n', 'utf-8');
+    const mtime = new Date(Date.now() - ageHours * 3600_000);
+    fs.utimesSync(filePath, mtime, mtime);
+  };
+
+  it('getRecordingStats：统计 count 与 totalBytes；目录不存在返回零值', async () => {
+    expect(recorder.getRecordingStats()).toEqual({ count: 0, totalBytes: 0 });
+
+    await writeRecording('session_s1_2026-01-01.jsonl', 1);
+    await writeRecording('session_s2_2026-01-02.jsonl', 2);
+    // 非 session_*.jsonl 命名的文件不受治理（用户自放文件）
+    await writeRecording('user-notes.txt', 3);
+
+    const stats = recorder.getRecordingStats();
+    expect(stats.count).toBe(2);
+    expect(stats.totalBytes).toBeGreaterThan(0);
+  });
+
+  it('pruneOldRecordings：按 mtime 保留最近 N 个，删除其余', async () => {
+    for (let i = 0; i < 6; i++) {
+      await writeRecording(`session_s${i}_f.jsonl`, i + 1); // s0 最旧
+    }
+    const deleted = recorder.pruneOldRecordings(3);
+    expect(deleted).toBe(3);
+
+    const remaining = (readdirSync(join(wsRoot, 'logs')) as string[]).filter((f) =>
+      f.startsWith('session_'),
+    );
+    expect(remaining).toHaveLength(3);
+    // 保留的应是最新的 3 个（s0/s1/s2 —— 年龄 1/2/3 小时，s0 最新）
+    for (const keep of ['session_s0_f.jsonl', 'session_s1_f.jsonl', 'session_s2_f.jsonl']) {
+      expect(remaining).toContain(keep);
+    }
+  });
+
+  it('pruneOldRecordings：仅治理 session_*.jsonl 命名，用户文件不受影响', async () => {
+    await writeRecording('session_a.jsonl', 100);
+    await writeRecording('my-data.jsonl', 100);
+    const deleted = recorder.pruneOldRecordings(0);
+    expect(deleted).toBe(1);
+    expect(existsSync(join(wsRoot, 'logs', 'my-data.jsonl'))).toBe(true);
+  });
+
+  it('pruneOldRecordings：未超限返回 0 且不删除任何文件', async () => {
+    await writeRecording('session_x.jsonl', 1);
+    expect(recorder.pruneOldRecordings(200)).toBe(0);
+    expect(existsSync(join(wsRoot, 'logs', 'session_x.jsonl'))).toBe(true);
+  });
+});
diff --git a/electron/services/__tests__/session-truncate-trace.test.ts b/electron/services/__tests__/session-truncate-trace.test.ts
new file mode 100644
index 0000000..bfcb3fc
--- /dev/null
+++ b/electron/services/__tests__/session-truncate-trace.test.ts
@@ -0,0 +1,146 @@
+/**
+ * truncateMessagesAfter × TRACE metadata 联动测试（v0.7.3 P1-2）
+ *
+ * 根治契约：编辑重发/重新生成截断消息时，sessions.metadata 中的 traceSteps
+ * 必须按 startedAt <= 锚点消息 created_at 同步过滤，否则 Trace 面板出现
+ * "幽灵步骤"（v0.7.2 A1 只修了 /clear 路径的 metadata 残留）。
+ *
+ * 运行要求：better-sqlite3 为 Electron ABI 构建，需 test:electron 模式执行；
+ * 系统 Node 下自动跳过。
+ */
+
+import { describe, it, expect, beforeAll, afterAll, vi } from 'vitest';
+
+vi.mock('electron-log', () => ({
+  default: { info: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn() },
+}));
+
+let dbAvailable = true;
+let Database: typeof import('better-sqlite3');
+try {
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  Database = require('better-sqlite3');
+  const probe = new Database(':memory:');
+  probe.close();
+} catch {
+  dbAvailable = false;
+}
+
+describe.skipIf(!dbAvailable)('truncateMessagesAfter × TRACE metadata 过滤（P1-2）', () => {
+  let db: import('better-sqlite3').Database;
+  // 测试域宽松类型：SessionService 依赖 Electron ABI 的 better-sqlite3 实例，
+  // 直接持有真实实例即可（同 session-summary.test.ts 的既有写法）
+  // eslint(next-line 无需禁用：测试文件未启用 no-explicit-any)
+  let sessionService: any;
+
+  beforeAll(async () => {
+    const { SessionService } = await import('../session.service');
+    db = new Database(':memory:');
+    db.exec(`
+      CREATE TABLE sessions (
+        id TEXT PRIMARY KEY,
+        title TEXT DEFAULT '新会话',
+        created_at INTEGER NOT NULL,
+        updated_at INTEGER NOT NULL,
+        message_count INTEGER DEFAULT 0,
+        pinned INTEGER DEFAULT 0,
+        archived INTEGER DEFAULT 0,
+        metadata TEXT DEFAULT '{}'
+      );
+      CREATE TABLE messages (
+        id TEXT PRIMARY KEY,
+        session_id TEXT NOT NULL,
+        role TEXT NOT NULL,
+        content TEXT,
+        reasoning_content TEXT,
+        tool_calls TEXT,
+        tool_result TEXT,
+        attachments TEXT,
+        iteration INTEGER,
+        created_at INTEGER NOT NULL
+      );
+      CREATE TABLE session_summaries (
+        session_id TEXT PRIMARY KEY,
+        summary TEXT NOT NULL,
+        summarized_until_rowid INTEGER NOT NULL,
+        updated_at INTEGER NOT NULL DEFAULT (unixepoch() * 1000)
+      );
+    `);
+    db.prepare(
+      'INSERT INTO sessions (id, created_at, updated_at, message_count) VALUES (?, ?, ?, 0)',
+    ).run('s_trace', Date.now(), Date.now());
+    sessionService = new SessionService(() => db);
+  });
+
+  afterAll(() => {
+    try {
+      db?.close();
+    } catch {
+      /* ignore */
+    }
+  });
+
+  const insertMessage = (id: string, content: string, createdAt: number): number => {
+    db.prepare(
+      `INSERT INTO messages (id, session_id, role, content, created_at) VALUES (?, ?, 'user', ?, ?)`,
+    ).run(id, 's_trace', content, createdAt);
+    const row = db.prepare('SELECT rowid AS rid FROM messages WHERE id = ?').get(id) as {
+      rid: number;
+    };
+    return row.rid;
+  };
+
+  const saveMetadata = (steps: Array<{ runId?: string; startedAt: number }>): void => {
+    db.prepare('UPDATE sessions SET metadata = ? WHERE id = ?').run(
+      JSON.stringify({ traceSteps: steps, tokenUsage: { totalTokens: 10 } }),
+      's_trace',
+    );
+  };
+
+  const loadMetadataSteps = (): Array<{ runId?: string; startedAt: number }> => {
+    const row = db.prepare('SELECT metadata FROM sessions WHERE id = ?').get('s_trace') as {
+      metadata: string;
+    };
+    const parsed = JSON.parse(row.metadata) as {
+      traceSteps?: Array<{ runId?: string; startedAt: number }>;
+    };
+    return parsed.traceSteps ?? [];
+  };
+
+  it('截断后：晚于锚点消息的 traceSteps 被过滤，早于/等于的保留', () => {
+    const anchorTs = 1_000_000;
+    const anchorId = 'm_anchor';
+    insertMessage('m_before', '更早的消息', anchorTs - 10_000);
+    insertMessage(anchorId, '锚点消息', anchorTs);
+    insertMessage('m_after', '锚点后的消息', anchorTs + 10_000);
+
+    saveMetadata([
+      { runId: 'r_before', startedAt: anchorTs - 9_000 },
+      { runId: 'r_anchor', startedAt: anchorTs }, // 锚点触发的 run（将被截）
+      { runId: 'r_after', startedAt: anchorTs + 11_000 },
+    ]);
+
+    const truncated = sessionService.truncateMessagesAfter('s_trace', anchorId, true);
+    expect(truncated).toBe(true);
+
+    const kept = loadMetadataSteps();
+    expect(kept.map((s) => s.runId)).toEqual(['r_before']);
+  });
+
+  it('metadata 缺失/损坏时不阻断截断主流程', () => {
+    db.prepare("UPDATE sessions SET metadata = 'not-json' WHERE id = ?").run('s_trace');
+    const anchorTs = 2_000_000;
+    const anchorId = 'm2';
+    insertMessage(anchorId, '锚点消息 2', anchorTs);
+    insertMessage('m2_after', '锚点 2 之后的消息', anchorTs + 1000);
+
+    expect(() => sessionService.truncateMessagesAfter('s_trace', anchorId, true)).not.toThrow();
+    expect(sessionService.truncateMessagesAfter('s_trace', anchorId, true)).toBe(false); // 已被上一句删过，无行可删
+  });
+
+  it('锚点不存在时返回 false 且不触碰 metadata', () => {
+    saveMetadata([{ runId: 'r_keep', startedAt: Date.now() }]);
+    expect(sessionService.truncateMessagesAfter('s_trace', 'm_missing', true)).toBe(false);
+    expect(loadMetadataSteps()).toHaveLength(1);
+  });
+});
diff --git a/electron/services/__tests__/title-generator.test.ts b/electron/services/__tests__/title-generator.test.ts
new file mode 100644
index 0000000..20bd849
--- /dev/null
+++ b/electron/services/__tests__/title-generator.test.ts
@@ -0,0 +1,157 @@
+/**
+ * TitleGenerator 测试（v0.7.3 P4-1）
+ *
+ * T1 sanitizeTitle 清洗规则矩阵（围栏/引号/自述前缀/空白/截断/空值）；
+ * T2 maybeGenerateTitle 幂等（每会话仅一次）；
+ * T3 已有自定义标题的会话不覆盖；
+ * T4 LLM 失败/超时静默回退（不抛错，返回 null）；
+ * T5 空输入门控。
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+
+vi.mock('electron-log', () => ({
+  default: { info: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn() },
+}));
+
+import { TitleGenerator, sanitizeTitle } from '../title-generator.service';
+import type { IMetonaProviderAdapter, MetonaResponse } from '../../harness/types';
+
+describe('sanitizeTitle', () => {
+  it('T1a: 干净文本原样通过', () => {
+    expect(sanitizeTitle('修复登录超时')).toBe('修复登录超时');
+  });
+
+  it('T1b: markdown 围栏与列表标记剥离', () => {
+    expect(sanitizeTitle('```json\n"标题"\n```')).toBe('标题');
+    expect(sanitizeTitle('- 修复登录超时')).toBe('修复登录超时');
+    expect(sanitizeTitle('# 修复登录超时')).toBe('修复登录超时');
+  });
+
+  it('T1c: 成对包裹引号剥离', () => {
+    expect(sanitizeTitle('"修复登录超时"')).toBe('修复登录超时');
+    expect(sanitizeTitle('“修复登录超时”')).toBe('修复登录超时');
+  });
+
+  it('T1d: 自述前缀剥离（标题:/Title:）', () => {
+    expect(sanitizeTitle('标题: 修复登录超时')).toBe('修复登录超时');
+    expect(sanitizeTitle('Title: Fix login timeout')).toBe('Fix login timeout');
+  });
+
+  it('T1e: 换行折叠为空格、首尾空白去除', () => {
+    expect(sanitizeTitle('修复\n登录  超时\n')).toBe('修复 登录 超时');
+  });
+
+  it('T1f: 超长截断到 maxLen', () => {
+    const out = sanitizeTitle('a'.repeat(100), 40);
+    expect(out?.length).toBe(40);
+  });
+
+  it('T1g: 空值/纯符号 → null', () => {
+    expect(sanitizeTitle('')).toBeNull();
+    expect(sanitizeTitle('   ')).toBeNull();
+    expect(sanitizeTitle('"""')).toBeNull();
+    expect(sanitizeTitle('###')).toBeNull();
+  });
+});
+
+function makeAdapter(content: string | Error): IMetonaProviderAdapter {
+  return {
+    providerId: 'mock',
+    supportedModels: ['m'],
+    supportsToolCalling: true,
+    supportsThinking: false,
+    getContextWindow: () => 128_000,
+    send: vi.fn(async (): Promise<MetonaResponse> => {
+      if (content instanceof Error) throw content;
+      return {
+        meta: { requestId: 'r', provider: 'mock', model: 'm', latencyMs: 1, timestamp: Date.now() },
+        content,
+        usage: { inputTokens: 1, outputTokens: 1, totalTokens: 2 },
+        finishReason: 'stop' as never,
+      };
+    }),
+    sendStream: vi.fn(),
+    setAbortSignal: vi.fn(),
+    healthCheck: async () => true,
+  } as unknown as IMetonaProviderAdapter;
+}
+
+function makeSessionService(existing: Array<{ id: string; title: string }> = []) {
+  // 注意：真实 SessionService.list() 是同步方法（better-sqlite3），
+  // mock 必须保持同步返回，否则 generate 内的 .find() 拿到 Promise
+  return {
+    list: vi.fn(() => existing) as unknown as () => Array<{ id: string; title: string }>,
+    rename: vi.fn(() => true),
+  };
+}
+
+describe('TitleGenerator.maybeGenerateTitle', () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it('T2: 首个 run 生成标题并调用 rename；同会话幂等', async () => {
+    const svc = makeSessionService([{ id: 's1', title: '新会话' }]);
+    const gen = new TitleGenerator(() => makeAdapter('修复登录超时'), svc as never);
+    const title = await gen.maybeGenerateTitle(
+      's1',
+      '帮我看看为什么登录会超时',
+      '已定位为 token 过期…',
+    );
+    expect(title).toBe('修复登录超时');
+    expect(svc.rename).toHaveBeenCalledWith('s1', '修复登录超时');
+
+    // 第二次调用（同会话）幂等 —— 不再调用 LLM
+    const second = await gen.maybeGenerateTitle('s1', '再问一次', '再答一次');
+    expect(second).toBeNull();
+  });
+
+  it('T3: 已有自定义标题的会话不覆盖', async () => {
+    const svc = makeSessionService([{ id: 's1', title: '用户手动命名' }]);
+    const adapterSend = vi.fn();
+    const adapter = makeAdapter('不应被使用');
+    (adapter.send as ReturnType<typeof vi.fn>).mockImplementation(async (...args: unknown[]) => {
+      adapterSend(...args);
+      throw new Error('should not be called');
+    });
+    const gen = new TitleGenerator(() => adapter, svc as never);
+    const title = await gen.maybeGenerateTitle('s1', '内容', '回答');
+    expect(title).toBeNull();
+    expect(adapterSend).not.toHaveBeenCalled();
+  });
+
+  it('T4: LLM 失败静默回退（返回 null，不抛错），且同会话不重试', async () => {
+    const svc = makeSessionService([{ id: 's1', title: '新会话' }]);
+    const gen = new TitleGenerator(() => makeAdapter(new Error('network down')), svc as never);
+    await expect(gen.maybeGenerateTitle('s1', 'q', 'a')).resolves.toBeNull();
+    await expect(gen.maybeGenerateTitle('s1', 'q2', 'a2')).resolves.toBeNull();
+    expect(svc.rename).not.toHaveBeenCalled();
+  });
+
+  it('T5: 空 sessionId / 双向空内容 → 不生成', async () => {
+    const svc = makeSessionService();
+    const adapter = makeAdapter('x');
+    const gen = new TitleGenerator(() => adapter, svc as never);
+    expect(await gen.maybeGenerateTitle('', 'q', 'a')).toBeNull();
+    expect(await gen.maybeGenerateTitle('s1', '  ', '  ')).toBeNull();
+  });
+
+  it('T6: 并发重入复用同一 Promise（不重复调用 LLM）', async () => {
+    const svc = makeSessionService([{ id: 's1', title: '新会话' }]);
+    const gen = new TitleGenerator(() => makeAdapter('并发标题'), svc as never);
+    // 使用真实定时器场景下并发触发
+    vi.useRealTimers();
+    const [a, b] = await Promise.all([
+      gen.maybeGenerateTitle('s2', 'q', 'a'),
+      gen.maybeGenerateTitle('s2', 'q', 'a'),
+    ]);
+    expect(a).toBe('并发标题');
+    expect(b).toBe('并发标题');
+    // rename 仅一次（并发重入复用）
+    expect(svc.rename).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/electron/services/database.service.ts b/electron/services/database.service.ts
index 6c7373e..d209861 100644
--- a/electron/services/database.service.ts
+++ b/electron/services/database.service.ts
@@ -70,6 +70,14 @@ export const CONFIG_DEFAULTS: ConfigDefaultEntry[] = [
   // F-8 接通: promptInjectionDefense 由 main.ts（SecurityScanHook）与 ipc/agent.ts（用户消息检测）消费
   { key: 'security.promptInjectionDefense', value: true, category: 'security' },
 
+  // v0.7.3 P1-5: 记忆固化节流（consolidation-policy 消费）
+  { key: 'memory.consolidationEnabled', value: true, category: 'memory' },
+  { key: 'memory.consolidationMinChars', value: 200, category: 'memory' },
+  { key: 'memory.consolidationIntervalMs', value: 600000, category: 'memory' },
+
+  // v0.7.3 P4-2: MCP 自动重连开关（mcp-manager.service 消费；断连后指数退避重试）
+  { key: 'mcp.autoReconnect', value: true, category: 'mcp' },
+
   // UI 配置
   // F-8 清理: 移除死配置 ui.fontSize / ui.animationMode（无消费者；主题走 localStorage）
   { key: 'ui.theme', value: 'auto', category: 'ui' },
@@ -106,7 +114,6 @@ export class DatabaseService {
    */
   static readonly SCHEMA_VERSION = 1;
 
-
   constructor(workspacePath?: string) {
     const baseDir = workspacePath ?? join(app.getPath('userData'), 'MetonaWorkspaces', 'default');
     const metonaDir = join(baseDir, '.metona');
diff --git a/electron/services/global-config.service.ts b/electron/services/global-config.service.ts
index dfaedfd..97cb423 100644
--- a/electron/services/global-config.service.ts
+++ b/electron/services/global-config.service.ts
@@ -24,7 +24,11 @@ import { join } from 'path';
 import { existsSync, readFileSync, writeFileSync, mkdirSync } from 'fs';
 import log from 'electron-log';
 import { CONFIG_DEFAULTS } from './database.service';
-import { decryptConfigValue, encryptConfigValue, isSensitiveConfigKey } from '../utils/secure-config';
+import {
+  decryptConfigValue,
+  encryptConfigValue,
+  isSensitiveConfigKey,
+} from '../utils/secure-config';
 
 /** 全局配置文件路径（userData 下，与工作空间无关） */
 const GLOBAL_CONFIG_FILE = join(app.getPath('userData'), 'global-config.json');
@@ -43,6 +47,8 @@ const GLOBAL_KEY_PREFIXES = [
   'openai.',
   'anthropic.',
   'onboarding.',
+  // v0.7.3 P1-5: 记忆固化节流（机器级策略，跨工作空间一致）
+  'memory.',
 ];
 
 /** 判断 key 是否属于全局配置 */
@@ -104,7 +110,9 @@ export class GlobalConfigService {
       if (existsSync(GLOBAL_CONFIG_FILE)) {
         const raw = readFileSync(GLOBAL_CONFIG_FILE, 'utf-8');
         this.data = JSON.parse(raw) as GlobalConfigData;
-        log.info(`[GlobalConfig] Loaded ${Object.keys(this.data).length} keys from ${GLOBAL_CONFIG_FILE}`);
+        log.info(
+          `[GlobalConfig] Loaded ${Object.keys(this.data).length} keys from ${GLOBAL_CONFIG_FILE}`,
+        );
       } else {
         // 确保父目录存在
         const dir = join(GLOBAL_CONFIG_FILE, '..');
diff --git a/electron/services/mcp-manager.service.ts b/electron/services/mcp-manager.service.ts
index ad9caca..f941640 100644
--- a/electron/services/mcp-manager.service.ts
+++ b/electron/services/mcp-manager.service.ts
@@ -25,6 +25,8 @@ import type { ToolRegistry } from '../harness/tools/registry';
 import type { IMetonaTool, ToolExecutionContext } from '../harness/types/metona-tool';
 import type { MetonaToolDef } from '../harness/types';
 import { MetonaToolCategory, MetonaRiskLevel } from '../harness/types';
+// v0.7.3 P3-2: 子进程环境净化收敛到 utils/safe-env.ts 单源（与 run_command 共用）
+import { buildSafeChildEnv } from '../utils/safe-env';
 
 // v0.3.0 修复: 安全解析 JSON args，防止数据库中存储了非法 JSON 导致初始化崩溃
 /** @visibleForTesting 纯函数，供安全表测直接断言 */
@@ -97,44 +99,14 @@ export function validateMcpCommand(command: string, args: string[]): void {
 /**
  * #6 修复 + 审查修复: 构建安全的子进程环境变量
  *
- * 审查修复: 原白名单方案过于激进，剥离了 MCP Server 运行所需的 npm_config_*、代理变量等，
- * 导致 MCP Server 无法启动。改为黑名单方案：剔除包含敏感后缀的变量，保留其余。
- *
- * 注意: GITHUB_TOKEN / SLACK_BOT_TOKEN 等含 _TOKEN 后缀的变量也会被过滤。
+ * v0.7.3 P3-2: 实现收敛到 utils/safe-env.ts（buildSafeChildEnv）——与
+ * run_command 共用同一黑名单（历史双实现已漂移）。MCP 侧无运行时差异注入。
+ * 注意: GITHUB_TOKEN / SLACK_BOT_TOKEN 等含 _TOKEN 后缀的变量会被过滤；
  * 如果 MCP Server 需要这些凭证，应通过 MCP Server 配置文件传递，而非环境变量。
  */
 /** @visibleForTesting 纯函数，供安全表测直接断言 */
 export function buildSafeEnv(): Record<string, string> {
-  // 敏感变量后缀黑名单 — 匹配这些后缀的变量不会被传递给子进程
-  const SENSITIVE_SUFFIXES = [
-    '_API_KEY',
-    '_TOKEN',
-    '_SECRET',
-    '_PASSWORD',
-    '_PASSWD',
-    '_CREDENTIAL',
-    '_CREDENTIALS',
-    '_PRIVATE_KEY',
-  ];
-  // 敏感变量名黑名单（精确匹配）
-  const SENSITIVE_KEYS = new Set([
-    'DEEPSEEK_API_KEY',
-    'AGNES_API_KEY',
-    'MIMO_API_KEY',
-    'GITEA_PASSWORD',
-    'DATABASE_PASSWORD',
-  ]);
-
-  const env: Record<string, string> = {};
-  for (const [key, val] of Object.entries(process.env)) {
-    if (!val) continue;
-    // 跳过敏感变量名
-    if (SENSITIVE_KEYS.has(key)) continue;
-    // 跳过敏感后缀变量
-    if (SENSITIVE_SUFFIXES.some((suffix) => key.toUpperCase().endsWith(suffix))) continue;
-    env[key] = val;
-  }
-  return env;
+  return buildSafeChildEnv();
 }
 
 /**
@@ -171,7 +143,29 @@ export function safeParseHeaders(
 
 // ===== 类型定义 =====
 
-export type MCPServerStatus = 'connecting' | 'connected' | 'disconnected' | 'error';
+export type MCPServerStatus =
+  | 'connecting'
+  | 'connected'
+  | 'disconnected'
+  | 'error'
+  | 'reconnecting';
+
+// ===== v0.7.3 P4-2: 自动重连策略常量 =====
+
+/** 最大自动重连次数（超过后停留 error 态，等待用户手动 toggle） */
+export const MAX_RECONNECT_ATTEMPTS = 3;
+
+/**
+ * 重连退避间隔（毫秒）：5s / 15s / 60s。
+ * 纯函数 nextRetryDelayMs 消费，表测锁定（vitest fake timers 场景）。
+ */
+export const RECONNECT_DELAYS_MS = [5_000, 15_000, 60_000] as const;
+
+/** @visibleForTesting 纯函数 —— 第 attempt 次（1-based）重试前的等待毫秒数 */
+export function nextRetryDelayMs(attempt: number): number {
+  const idx = Math.min(Math.max(attempt, 1), RECONNECT_DELAYS_MS.length) - 1;
+  return RECONNECT_DELAYS_MS[idx];
+}
 
 export interface MCPServerConfig {
   id: string;
@@ -261,6 +255,17 @@ class MCPToolAdapter implements IMetonaTool {
 
 export class MCPManager {
   private servers = new Map<string, MCPServerState>();
+
+  // ===== v0.7.3 P4-2: 自动重连状态 =====
+  /** 总开关（mcp.autoReconnect，默认 true；main.ts 启动时注入，配置变更联动） */
+  private autoReconnect = true;
+  /** 各 server 的重连定时器（disconnect/shutdown 时必须清理） */
+  private reconnectTimers = new Map<string, NodeJS.Timeout>();
+  /** 各 server 已尝试的自动重连次数（成功连接后清零） */
+  private reconnectAttempts = new Map<string, number>();
+  /** 待重连的配置快照（重连时从原配置重建连接，避免读 DB 中间态） */
+  private reconnectConfigs = new Map<string, MCPServerConfig>();
+
   /**
    * 工具集合变更回调（v0.5.3）
    *
@@ -277,6 +282,93 @@ export class MCPManager {
     private toolRegistry: ToolRegistry,
   ) {}
 
+  // ===== v0.7.3 P4-2: 自动重连 =====
+
+  /**
+   * 设置自动重连开关（main.ts 启动时按 mcp.autoReconnect 注入；
+   * 配置变更经 shared.ts applyConfigSideEffects 联动）。
+   * 关闭时立即取消所有已排程的重连并清零计数（用户显式意图优先）。
+   */
+  setAutoReconnect(enabled: boolean): void {
+    this.autoReconnect = enabled;
+    if (!enabled) {
+      this.cancelAllReconnects();
+    }
+    log.debug(`[MCPManager] autoReconnect = ${enabled}`);
+  }
+
+  /** 查询某 server 的重连状态（测试与诊断用） */
+  getReconnectInfo(name: string): { attempts: number; scheduled: boolean } | null {
+    const attempts = this.reconnectAttempts.get(name);
+    const scheduled = this.reconnectTimers.has(name);
+    if (attempts === undefined && !scheduled) return null;
+    return { attempts: attempts ?? 0, scheduled };
+  }
+
+  /** 取消某 server 的重连排程（用户显式断开/移除时调用） */
+  private cancelReconnect(name: string): void {
+    const timer = this.reconnectTimers.get(name);
+    if (timer) {
+      clearTimeout(timer);
+      this.reconnectTimers.delete(name);
+    }
+    this.reconnectAttempts.delete(name);
+    this.reconnectConfigs.delete(name);
+  }
+
+  /** 取消全部重连排程（shutdown / 开关关闭时调用） */
+  private cancelAllReconnects(): void {
+    for (const timer of this.reconnectTimers.values()) {
+      clearTimeout(timer);
+    }
+    this.reconnectTimers.clear();
+    this.reconnectAttempts.clear();
+    this.reconnectConfigs.clear();
+  }
+
+  /**
+   * 连接失败后排程指数退避重连（5s/15s/60s，最多 3 次）。
+   * 状态机进入 'reconnecting'（设置页可见）；重试耗尽停留 'error'。
+   * 仅记住传入配置快照 —— 重连时按原配置重建，不读 DB 中间态。
+   */
+  private scheduleReconnect(name: string, config: MCPServerConfig): void {
+    if (!this.autoReconnect) return;
+
+    const attempts = (this.reconnectAttempts.get(name) ?? 0) + 1;
+    if (attempts > MAX_RECONNECT_ATTEMPTS) {
+      log.warn(
+        `[MCPManager] "${name}" reconnect exhausted (${MAX_RECONNECT_ATTEMPTS} attempts) — staying in error state`,
+      );
+      this.reconnectAttempts.delete(name);
+      this.reconnectConfigs.delete(name);
+      return;
+    }
+
+    this.reconnectAttempts.set(name, attempts);
+    this.reconnectConfigs.set(name, config);
+    const state = this.servers.get(name);
+    if (state) state.status = 'reconnecting';
+
+    const delay = nextRetryDelayMs(attempts);
+    log.info(
+      `[MCPManager] "${name}" reconnect scheduled in ${delay / 1000}s (attempt ${attempts}/${MAX_RECONNECT_ATTEMPTS})`,
+    );
+    const timer = setTimeout(() => {
+      this.reconnectTimers.delete(name);
+      const snapshot = this.reconnectConfigs.get(name);
+      if (!snapshot) return;
+      log.info(
+        `[MCPManager] "${name}" reconnecting (attempt ${attempts}/${MAX_RECONNECT_ATTEMPTS})`,
+      );
+      void this.connectServer(snapshot).catch(() => {
+        /* connectServer 失败路径已自行 scheduleReconnect / 记录状态 */
+      });
+    }, delay);
+    // 定时器不阻塞应用退出
+    timer.unref?.();
+    this.reconnectTimers.set(name, timer);
+  }
+
   /** 注册工具集合变更回调（main.ts 在 AgentEngineManager 创建后注入） */
   setOnToolsChanged(callback: () => void): void {
     this.toolsChangedCallback = callback;
@@ -356,10 +448,9 @@ export class MCPManager {
   async connectServer(config: MCPServerConfig): Promise<void> {
     const { name } = config;
 
-    // 断开已有连接
-    if (this.servers.has(name)) {
-      await this.disconnectServer(name);
-    }
+    // 断开已有连接（内部拆除 —— 保留重连簿记，否则重试计数被清零、
+    // 退避序列永远停在第 1 次；用户显式断开走 disconnectServer）
+    await this.teardownConnection(name);
 
     this.servers.set(name, {
       config,
@@ -441,6 +532,15 @@ export class MCPManager {
       state.connectedAt = Date.now();
       state.error = undefined;
 
+      // v0.7.3 P4-2: 连接成功 —— 清零重连计数并取消排程
+      this.reconnectAttempts.delete(name);
+      this.reconnectConfigs.delete(name);
+      const pendingTimer = this.reconnectTimers.get(name);
+      if (pendingTimer) {
+        clearTimeout(pendingTimer);
+        this.reconnectTimers.delete(name);
+      }
+
       // 更新数据库
       const db = this.getDB();
       db.prepare(
@@ -468,6 +568,9 @@ export class MCPManager {
       `,
       ).run((error as Error).message, name);
 
+      // v0.7.3 P4-2: 失败后排程指数退避自动重连（开关关闭时 no-op）
+      this.scheduleReconnect(name, config);
+
       log.error(`MCP server "${name}" connection failed:`, error);
       throw error;
     }
@@ -476,14 +579,15 @@ export class MCPManager {
   /**
    * 断开 MCP Server
    */
-  async disconnectServer(name: string): Promise<void> {
+  /**
+   * 内部连接拆除（保留重连簿记）—— connectServer 重连前的清理动作。
+   * 与 disconnectServer 的区别：不清 reconnectAttempts/Timers/Configs，
+   * 否则自动重连的每次重试都会把自己的计数清零（退避序列永远停在第 1 次）。
+   */
+  private async teardownConnection(name: string): Promise<void> {
     const state = this.servers.get(name);
     if (!state) return;
-
-    // 从 ToolRegistry 注销
     this.toolRegistry.unregisterMCPTools(name);
-
-    // 关闭客户端
     if (state.client) {
       try {
         await state.client.close();
@@ -491,13 +595,24 @@ export class MCPManager {
         // 忽略关闭错误
       }
     }
-
-    state.status = 'disconnected';
     state.client = null;
     state.tools = [];
-
-    // v0.5.3: 工具集合已变化 — 通知调用方同步引擎（已有引擎需移除失效工具定义）
     this.notifyToolsChanged();
+  }
+
+  /**
+   * 断开 MCP Server（用户显式语义：取消重连排程 + 拆除连接）
+   */
+  async disconnectServer(name: string): Promise<void> {
+    // v0.7.3 P4-2: 用户显式断开/移除 —— 取消重连排程（用户意图优先于自动重试）。
+    // 无论是否存在连接态（error/reconnecting 态的 server 也可能被移除）都执行。
+    this.cancelReconnect(name);
+    await this.teardownConnection(name);
+
+    const state = this.servers.get(name);
+    if (state) {
+      state.status = 'disconnected';
+    }
 
     log.info(`MCP server "${name}" disconnected`);
   }
@@ -601,12 +716,16 @@ export class MCPManager {
     status: MCPServerStatus;
     toolCount: number;
     error?: string;
+    /** v0.7.3 P4-2: reconnecting 状态下的已尝试次数（第 N/3 次排程） */
+    reconnectAttempt?: number;
   }> {
     return Array.from(this.servers.values()).map((s) => ({
       name: s.config.name,
       status: s.status,
       toolCount: s.tools.length,
       error: s.error,
+      reconnectAttempt:
+        s.status === 'reconnecting' ? this.reconnectAttempts.get(s.config.name) : undefined,
     }));
   }
 
@@ -618,6 +737,7 @@ export class MCPManager {
     status: MCPServerStatus;
     toolCount: number;
     error?: string;
+    reconnectAttempt?: number;
   } | null {
     const state = this.servers.get(name);
     if (!state) return null;
@@ -626,6 +746,8 @@ export class MCPManager {
       status: state.status,
       toolCount: state.tools.length,
       error: state.error,
+      reconnectAttempt:
+        state.status === 'reconnecting' ? this.reconnectAttempts.get(state.config.name) : undefined,
     };
   }
 
@@ -633,6 +755,8 @@ export class MCPManager {
    * 关闭所有连接
    */
   async shutdown(): Promise<void> {
+    // v0.7.3 P4-2: 退出前取消全部重连排程（timer 已 unref，此处幂等清理）
+    this.cancelAllReconnects();
     const names = Array.from(this.servers.keys());
     await Promise.allSettled(names.map((n) => this.disconnectServer(n)));
     log.info('MCP Manager shut down');
diff --git a/electron/services/session-recorder.service.ts b/electron/services/session-recorder.service.ts
index e22136b..48d74f3 100644
--- a/electron/services/session-recorder.service.ts
+++ b/electron/services/session-recorder.service.ts
@@ -18,7 +18,15 @@
  */
 
 import { join } from 'path';
-import { appendFileSync, existsSync, mkdirSync, promises } from 'fs';
+import {
+  appendFileSync,
+  existsSync,
+  mkdirSync,
+  promises,
+  readdirSync,
+  statSync,
+  unlinkSync,
+} from 'fs';
 import log from 'electron-log';
 
 // ===== 事件类型 =====
@@ -265,6 +273,82 @@ export class SessionRecorder {
     return first?.filePath ?? null;
   }
 
+  // ===== v0.7.3 P3-3: JSONL 录制文件生命周期治理 =====
+
+  /** JSONL 录制文件名模式（仅治理本服务产出的文件） */
+  private static readonly RECORDING_NAME = /^session_.+\.jsonl$/;
+
+  /**
+   * 统计录制目录中的 JSONL 文件（设置页展示 + 清理前置确认用）。
+   * 目录不存在 / 统计失败返回零值（不抛错）。
+   */
+  getRecordingStats(): { count: number; totalBytes: number } {
+    try {
+      const logsDir = join(this.workspacePath, 'logs');
+      if (!existsSync(logsDir)) return { count: 0, totalBytes: 0 };
+      const names = readdirSync(logsDir).filter((n) => SessionRecorder.RECORDING_NAME.test(n));
+      let totalBytes = 0;
+      for (const name of names) {
+        try {
+          totalBytes += statSync(join(logsDir, name)).size;
+        } catch {
+          /* 单文件统计失败跳过 */
+        }
+      }
+      return { count: names.length, totalBytes };
+    } catch {
+      return { count: 0, totalBytes: 0 };
+    }
+  }
+
+  /**
+   * 清理旧录制文件（按修改时间保留最近 maxFiles 个，默认 200）。
+   *
+   * 背景：workspace/logs/session_*.jsonl 随使用无限累积无任何清理路径。
+   * 清理策略：mtime 降序保留前 maxFiles 个，其余删除；仅匹配本服务的
+   * session_*.jsonl 命名（用户自放文件不受影响）。启动时（main.ts）与
+   * 设置页手动清理共用本方法。
+   *
+   * @returns 实际删除的文件数
+   */
+  pruneOldRecordings(maxFiles = 200): number {
+    try {
+      const logsDir = join(this.workspacePath, 'logs');
+      if (!existsSync(logsDir)) return 0;
+      const entries = readdirSync(logsDir)
+        .filter((n) => SessionRecorder.RECORDING_NAME.test(n))
+        .map((name) => {
+          try {
+            return { name, mtime: statSync(join(logsDir, name)).mtimeMs };
+          } catch {
+            return { name, mtime: 0 };
+          }
+        })
+        .sort((a, b) => b.mtime - a.mtime);
+
+      if (entries.length <= maxFiles) return 0;
+      const toDelete = entries.slice(maxFiles);
+      let deleted = 0;
+      for (const entry of toDelete) {
+        try {
+          unlinkSync(join(logsDir, entry.name));
+          deleted++;
+        } catch {
+          /* 单文件删除失败（占用中）跳过 */
+        }
+      }
+      if (deleted > 0) {
+        log.info(
+          `[SessionRecorder] Pruned ${deleted} old recording file(s) (kept ${Math.min(maxFiles, entries.length)})`,
+        );
+      }
+      return deleted;
+    } catch (err) {
+      log.warn('[SessionRecorder] pruneOldRecordings failed:', err);
+      return 0;
+    }
+  }
+
   // ===== 私有方法 =====
 
   /**
diff --git a/electron/services/session.service.ts b/electron/services/session.service.ts
index fba5c1d..d01dc9b 100644
--- a/electron/services/session.service.ts
+++ b/electron/services/session.service.ts
@@ -247,10 +247,12 @@ export class SessionService {
     const db = this.getDBFn();
     const op = inclusive ? '>=' : '>';
 
-    // 先查锚点 rowid（删除后无法再定位）
+    // 先查锚点 rowid 与时间戳（删除后无法再定位）
     const anchor = db
-      .prepare('SELECT rowid AS rid FROM messages WHERE session_id = ? AND id = ?')
-      .get(sessionId, messageId) as { rid: number } | undefined;
+      .prepare(
+        'SELECT rowid AS rid, created_at AS ts FROM messages WHERE session_id = ? AND id = ?',
+      )
+      .get(sessionId, messageId) as { rid: number; ts: number } | undefined;
     if (!anchor) return false;
 
     const result = db
@@ -270,6 +272,40 @@ export class SessionService {
         'DELETE FROM session_summaries WHERE session_id = ? AND summarized_until_rowid >= ?',
       ).run(sessionId, anchor.rid + (inclusive ? 0 : 1));
 
+      // v0.7.3 P1-2 根治: 同步截断 metadata 中的 TRACE 步骤。
+      // 此前编辑重发/重新生成只删消息 —— traceSteps 残留，Trace 面板出现
+      // "幽灵步骤"（与 /clear 的 metadata 残留同类，v0.7.2 A1 只修了 clear 路径）。
+      // 截断语义：锚点消息（inclusive 时含锚点）触发的 run 及其之后全部作废 ——
+      // 按 startedAt < 锚点消息 created_at 过滤保留更早 run 的步骤（严格小于：
+      // 锚点消息触发的 run 与消息同毫秒落库，等值属于"锚点侧"必须丢弃 ——
+      // 宁可多删一个边界步骤也不留幽灵步骤）。tokenUsage 为最近一次 run 的
+      // 累计展示值，紧随其后的重发 run 会重写，无需修正。
+      try {
+        const row = db.prepare('SELECT metadata FROM sessions WHERE id = ?').get(sessionId) as
+          | { metadata: string }
+          | undefined;
+        if (row?.metadata) {
+          const data = JSON.parse(row.metadata) as {
+            traceSteps?: Array<{ startedAt?: number }>;
+            tokenUsage?: unknown;
+          };
+          if (Array.isArray(data.traceSteps)) {
+            const kept = data.traceSteps.filter(
+              (s) => typeof s?.startedAt !== 'number' || s.startedAt < anchor.ts,
+            );
+            if (kept.length !== data.traceSteps.length) {
+              data.traceSteps = kept;
+              db.prepare('UPDATE sessions SET metadata = ? WHERE id = ?').run(
+                JSON.stringify(data),
+                sessionId,
+              );
+            }
+          }
+        }
+      } catch {
+        // metadata 解析失败不阻断截断主流程（与截断语义无耦合）
+      }
+
       log.info(
         `Session truncated: ${sessionId} (${result.changes} messages removed after ${messageId})`,
       );
@@ -355,12 +391,11 @@ export class SessionService {
 
   /**
    * 删除一条消息
+   *
+   * v0.7.3 P1-3: 随 sessions:deleteMessage 死通道一并移除 —— 该方法不回减
+   * sessions.message_count（saveMessage 加、删除不加的计数漂移面），且渲染层
+   * 从未有调用方。消息删除语义由 truncateMessagesAfter（含计数修正）覆盖。
    */
-  deleteMessage(messageId: string): boolean {
-    const db = this.getDBFn();
-    const result = db.prepare('DELETE FROM messages WHERE id = ?').run(messageId);
-    return result.changes > 0;
-  }
 
   /**
    * 清空会话所有消息
diff --git a/electron/services/title-generator.service.ts b/electron/services/title-generator.service.ts
new file mode 100644
index 0000000..ef66198
--- /dev/null
+++ b/electron/services/title-generator.service.ts
@@ -0,0 +1,200 @@
+/**
+ * Title Generator — 会话标题 LLM 自动生成（v0.7.3 P4-1）
+ *
+ * 背景：首轮消息后前端仅以"用户首条消息截前 30 字符"作为会话标题
+ * （agent-store.sendMessage），中文长句体验差且语义压缩生硬。
+ *
+ * 本服务在会话首个完成的 run 之后（terminationReason === 'completed'）用主
+ * Provider adapter 发起一次极小的非流式请求（maxTokens 32 / temperature 0.3 /
+ * thinking 关闭），生成 ≤16 字的精炼标题并写回 sessions 表。生成失败（网络 /
+ * 配额 / 解析失败）静默回退——前端首 30 字符截断标题保持有效，无损可用性。
+ *
+ * 契约：
+ * - 每个会话生命周期内仅生成一次（内存 Set 幂等，进程重启后自然重置——
+ *   已有非默认标题的会话通过 hasCustomTitle 判定跳过，不会重复生成）；
+ * - 标题经 sanitizeTitle 清洗：剥离 markdown/引号/换行/前后缀冒号，
+ *   折叠空白，超长截断，空结果返回 null（调用方保持原标题不变）。
+ */
+
+import { nanoid } from 'nanoid';
+import log from 'electron-log';
+import type { IMetonaProviderAdapter, MetonaRequest } from '../harness/types';
+import type { SessionService } from './session.service';
+
+/** 生成标题的最大长度（字符）——超过即截断 */
+const MAX_TITLE_LENGTH = 40;
+
+/** 传给 LLM 的用户消息 / 回答摘录长度 */
+const EXCERPT_LENGTH = 600;
+
+/** LLM 调用超时（标题生成不应阻塞任何主流程） */
+const TITLE_TIMEOUT_MS = 15_000;
+
+/**
+ * 清洗 LLM 返回的标题文本。
+ *
+ * 规则（按序应用）：
+ * 1. 剥离 markdown 代码围栏与首尾 `#`/`-`/`*` 列表标记；
+ * 2. 剥离成对包裹引号（中英文单双引号）；
+ * 3. 剥离 "标题:"/"Title:" 这类自述前缀；
+ * 4. 折叠全部空白（含换行）为单个空格并 trim；
+ * 5. 超过 maxLen 截断；
+ * 6. 空结果返回 null（调用方保持原标题）。
+ */
+export function sanitizeTitle(raw: string, maxLen: number = MAX_TITLE_LENGTH): string | null {
+  if (!raw || typeof raw !== 'string') return null;
+
+  let title = raw.trim();
+  // 1/2. markdown 围栏、列表标记与包裹引号 —— 循环应用直至稳定（处理嵌套包装
+  // 如 ```"标题"``` / 多层引号；剥除全部首尾引号字符而非仅成对项，
+  // 使 '"""' 这类纯符号输入收敛为空 → null）
+  for (let i = 0; i < 3; i++) {
+    const before = title;
+    title = title
+      .replace(/^```(?:[a-z]*)\s*/i, '')
+      .replace(/\s*```$/i, '')
+      .replace(/^[#\-*>]+\s*/, '')
+      .replace(/^["'“”『』「"]+/, '')
+      .replace(/["'“”『』「"]+$/, '');
+    if (title === before) break;
+  }
+  // 3. 自述前缀（标题:/Title:/会话标题: 等）
+  title = title.replace(/^(?:标题|会话标题|题目|title)\s*[:：]\s*/i, '');
+  // 4. 折叠空白（换行合并——LLM 偶发多行输出时取首行语义）
+  title = title.replace(/\s+/g, ' ').trim();
+  // 5. 截断
+  if (title.length > maxLen) title = title.slice(0, maxLen).trimEnd();
+  // 6. 空结果
+  return title.length > 0 ? title : null;
+}
+
+export class TitleGenerator {
+  /** 已生成过标题的会话（进程级幂等） */
+  private generated = new Set<string>();
+  /** 进行中的生成任务（防并发重复调用） */
+  private running = new Map<string, Promise<string | null>>();
+
+  constructor(
+    private getAdapter: () => IMetonaProviderAdapter,
+    private sessionService: SessionService,
+  ) {}
+
+  /**
+   * 为会话生成标题（fire-and-forget 调用；失败静默）。
+   *
+   * @param sessionId 会话 ID
+   * @param userMessage 用户原始消息（干净版本，不含注入前缀）
+   * @param assistantAnswer Agent 最终回答
+   * @returns 生成的标题（未生成/失败返回 null）
+   */
+  async maybeGenerateTitle(
+    sessionId: string,
+    userMessage: string,
+    assistantAnswer: string,
+  ): Promise<string | null> {
+    if (!sessionId || typeof sessionId !== 'string') return null;
+    // 输入门控：双向内容均为空无生成意义
+    if (!userMessage?.trim() && !assistantAnswer?.trim()) return null;
+
+    // 并发去重先于幂等短路 —— 同一会话进行中的生成必须复用同一 Promise，
+    // 而不能被"已占位"的幂等判断吞掉（否则并发第二调用拿到 null）
+    const existing = this.running.get(sessionId);
+    if (existing) return existing;
+    // 幂等：每会话仅一次（占位同步完成，先于任何 await）
+    if (this.generated.has(sessionId)) return null;
+
+    this.generated.add(sessionId);
+    const task = this.generate(sessionId, userMessage, assistantAnswer).finally(() => {
+      this.running.delete(sessionId);
+    });
+    this.running.set(sessionId, task);
+    return task;
+  }
+
+  private async generate(
+    sessionId: string,
+    userMessage: string,
+    assistantAnswer: string,
+  ): Promise<string | null> {
+    try {
+      const adapter = this.getAdapter();
+      if (!adapter) return null;
+
+      // 已有自定义标题（用户手动重命名 / 前端首条截断标题）时不覆盖，
+      // 避免用户主动命名被 LLM 标题冲掉
+      const sessions = this.sessionService.list();
+      const current = sessions.find((s) => s.id === sessionId);
+      if (current && current.title !== '新会话') {
+        log.debug(`[TitleGenerator] session ${sessionId} already titled "${current.title}" — skip`);
+        return null;
+      }
+
+      const request: MetonaRequest = {
+        meta: {
+          sessionId: 'title-generation',
+          iteration: 0,
+          requestId: `tg_${nanoid(12)}`,
+          timestamp: Date.now(),
+          agentVersion: '1.0.0',
+        },
+        systemPrompt: {
+          roleDefinition:
+            'You generate concise conversation titles for an AI assistant desktop app.',
+          outputConstraints:
+            'Given the first user message and the assistant reply, output ONE title of at most 16 characters ' +
+            'in the same language as the user message. The title must capture the core topic or task. ' +
+            'No quotes, no markdown, no ending punctuation, no explanations — output the title text ONLY.',
+          safetyGuidelines:
+            'Do not include sensitive data (passwords, keys, personal info) in the title.',
+        },
+        messages: [
+          {
+            role: 'user',
+            content:
+              `User message: ${userMessage.slice(0, EXCERPT_LENGTH)}\n\n` +
+              `Assistant reply: ${assistantAnswer.slice(0, EXCERPT_LENGTH)}\n\n` +
+              `Output the title only.`,
+            timestamp: Date.now(),
+          },
+        ],
+        params: {
+          maxTokens: 32,
+          temperature: 0.3,
+          stream: false,
+          thinkingEnabled: false,
+          thinkingEffort: 'low',
+        },
+      };
+
+      // 超时保护：标题生成绝不能拖慢会话收尾
+      let timer: ReturnType<typeof setTimeout> | undefined;
+      try {
+        const timeoutPromise = new Promise<never>((_, reject) => {
+          timer = setTimeout(() => reject(new Error('title generation timeout')), TITLE_TIMEOUT_MS);
+        });
+        const response = await Promise.race([adapter.send(request), timeoutPromise]);
+        const title = sanitizeTitle(response.content);
+        if (!title) {
+          log.debug(
+            `[TitleGenerator] session ${sessionId}: empty/unsanitizable title, keeping fallback`,
+          );
+          return null;
+        }
+        const renamed = this.sessionService.rename(sessionId, title);
+        if (renamed) {
+          log.info(`[TitleGenerator] session ${sessionId} titled: "${title}"`);
+        }
+        return renamed ? title : null;
+      } finally {
+        if (timer) clearTimeout(timer);
+      }
+    } catch (err) {
+      // 静默回退：标题失败不影响会话可用性（前端首条截断标题仍在）
+      log.debug(
+        `[TitleGenerator] session ${sessionId} title generation failed:`,
+        (err as Error).message,
+      );
+      return null;
+    }
+  }
+}
diff --git a/electron/utils/__tests__/safe-env.test.ts b/electron/utils/__tests__/safe-env.test.ts
new file mode 100644
index 0000000..4ec3257
--- /dev/null
+++ b/electron/utils/__tests__/safe-env.test.ts
@@ -0,0 +1,70 @@
+/**
+ * 子进程环境净化单源测试（v0.7.3 P3-2）
+ *
+ * buildSafeChildEnv 是 run_command 与 MCP stdio 启动的唯一净化实现：
+ * E1 敏感后缀剔除；E2 敏感精确名单剔除；E3 非敏感变量保留（黑名单不误伤）；
+ * E4 runtime 注入覆盖；E5 空值剔除。
+ */
+
+import { describe, it, expect } from 'vitest';
+import { buildSafeChildEnv } from '../safe-env';
+
+const SAMPLE_ENV: Record<string, string | undefined> = {
+  PATH: '/usr/bin',
+  LANG: 'zh_CN.UTF-8',
+  DEEPSEEK_API_KEY: 'sk-secret',
+  MY_SERVICE_TOKEN: 't',
+  APP_PASSWORD: 'p',
+  GITEA_PASSWORD: 'g',
+  GITHUB_TOKEN: 'gh',
+  HOME: '/home/u',
+};
+
+describe('buildSafeChildEnv', () => {
+  it('E1: 敏感后缀变量全部剔除（_API_KEY/_TOKEN/_PASSWORD/_SECRET/...）', () => {
+    const env = buildSafeChildEnv({ source: SAMPLE_ENV });
+    expect(env['DEEPSEEK_API_KEY']).toBeUndefined();
+    expect(env['MY_SERVICE_TOKEN']).toBeUndefined();
+    expect(env['APP_PASSWORD']).toBeUndefined();
+    expect(env['GITHUB_TOKEN']).toBeUndefined();
+  });
+
+  it('E2: 精确名单剔除（大小写不敏感后缀 + 精确 key）', () => {
+    const env = buildSafeChildEnv({ source: { GITEA_PASSWORD: 'g', DATABASE_PASSWORD: 'd' } });
+    expect(env['GITEA_PASSWORD']).toBeUndefined();
+    expect(env['DATABASE_PASSWORD']).toBeUndefined();
+  });
+
+  it('E3: 非敏感变量保留（黑名单不误伤 GIT_*/代理/路径类变量）', () => {
+    const env = buildSafeChildEnv({
+      source: { ...SAMPLE_ENV, GIT_AUTHOR_NAME: 'metona', HTTPS_PROXY: 'http://p:7890' },
+    });
+    expect(env['PATH']).toBe('/usr/bin');
+    expect(env['LANG']).toBe('zh_CN.UTF-8');
+    expect(env['HOME']).toBe('/home/u');
+    expect(env['GIT_AUTHOR_NAME']).toBe('metona');
+    expect(env['HTTPS_PROXY']).toBe('http://p:7890');
+  });
+
+  it('E4: runtime 注入覆盖净化结果（调用方运行时差异显式可控）', () => {
+    const env = buildSafeChildEnv({
+      source: SAMPLE_ENV,
+      runtime: { NODE_ENV: 'production', LANG: 'C.utf8' },
+    });
+    expect(env['NODE_ENV']).toBe('production');
+    // runtime 覆盖同名的净化保留值
+    expect(env['LANG']).toBe('C.utf8');
+  });
+
+  it('E5: 空值/undefined 变量剔除', () => {
+    const env = buildSafeChildEnv({ source: { EMPTY: '', UNSET: undefined, KEEP: 'x' } });
+    expect('EMPTY' in env).toBe(false);
+    expect('UNSET' in env).toBe(false);
+    expect(env['KEEP']).toBe('x');
+  });
+
+  it('E6: 无 source 时回退 process.env（运行路径契约；至少保留 PATH 类基本变量）', () => {
+    const env = buildSafeChildEnv({ runtime: { NODE_ENV: 'production' } });
+    expect(env['NODE_ENV']).toBe('production');
+  });
+});
diff --git a/electron/utils/network-proxy.ts b/electron/utils/network-proxy.ts
index 2cc9b10..ea0fce0 100644
--- a/electron/utils/network-proxy.ts
+++ b/electron/utils/network-proxy.ts
@@ -27,20 +27,37 @@ import log from 'electron-log';
 
 const AGENT_BROWSER_PARTITION = 'persist:metona-agent-browser';
 
+/**
+ * v0.7.3 P2-1: 代理激活标志（模块级状态，由 applySessionProxy 维护）。
+ *
+ * SSRF DNS pinning（ssrf-dispatcher）在此标志为 true 时必须退化为"仅入口校验"：
+ * 代理模式下 DNS 解析发生在代理服务端，本地无法感知/约束最终连接的 IP，
+ * per-request dispatcher 也会旁路用户配置的 ProxyAgent（破坏代理语义）。
+ * 已知边界与 M7 结论一致，显式暴露而非隐藏。
+ */
+let proxyActive = false;
+
+export function isProxyActive(): boolean {
+  return proxyActive;
+}
+
 export async function applySessionProxy(proxyUrl: string | null | undefined): Promise<void> {
   const envProxy = process.env['HTTPS_PROXY'] || process.env['HTTP_PROXY'] || '';
   const rules = (typeof proxyUrl === 'string' ? proxyUrl.trim() : '') || envProxy;
+  proxyActive = rules !== '';
 
   // ===== 通道一：Chromium sessions =====
   try {
-    const config = rules !== '' ? { proxyRules: rules } : ({ mode: 'direct' as const });
+    const config = rules !== '' ? { proxyRules: rules } : { mode: 'direct' as const };
     await session.defaultSession.setProxy(config);
     await session.fromPartition(AGENT_BROWSER_PARTITION).setProxy(config);
     log.info(
       `[Network] Chromium sessions proxy ${rules === '' ? 'set to direct (no proxy)' : `rules: ${rules}`}`,
     );
   } catch (err) {
-    log.warn(`[Network] Failed to apply Chromium session proxy "${rules}": ${(err as Error).message}`);
+    log.warn(
+      `[Network] Failed to apply Chromium session proxy "${rules}": ${(err as Error).message}`,
+    );
   }
 
   // ===== 通道二：主进程 Node fetch（undici 全局 dispatcher）=====
@@ -58,7 +75,9 @@ export async function applySessionProxy(proxyUrl: string | null | undefined): Pr
       }
     } catch (err) {
       // 理论仅在 undici 原生绑定异常时发生；fetch 将保持默认直连行为
-      log.warn(`[Network] Failed to set undici dispatcher for proxy "${rules}": ${(err as Error).message}`);
+      log.warn(
+        `[Network] Failed to set undici dispatcher for proxy "${rules}": ${(err as Error).message}`,
+      );
     }
   })();
 }
diff --git a/electron/utils/safe-env.ts b/electron/utils/safe-env.ts
new file mode 100644
index 0000000..abbd8e5
--- /dev/null
+++ b/electron/utils/safe-env.ts
@@ -0,0 +1,72 @@
+/**
+ * Safe Child Environment — 子进程环境变量净化（v0.7.3 P3-2 单源收敛）
+ *
+ * 背景：run_command（command.ts buildSafeCommandEnv）与 MCP stdio 启动
+ * （mcp-manager.service.ts buildSafeEnv）各持有一份几乎相同的"敏感变量黑名单
+ * + 全量剔除"实现，任何新增敏感 key 都要改两处（历史上已经漂移过一次：
+ * command 版多注入了 Windows 运行时变量）。本模块是唯一实现，两个调用方
+ * 按需声明运行时差异。
+ *
+ * 净化策略（黑名单方案，#9 修复 + 审查修复的延续）：
+ * - 敏感变量名黑名单（精确匹配）一律剔除；
+ * - 敏感后缀（_API_KEY/_TOKEN/_SECRET/...）一律剔除；
+ * - 其余变量保留（白名单方案会破坏 GIT_* 与 PYTHONPATH、代理变量等子进程必需项，
+ *   见 mcp-manager 历史注释）；
+ * - 调用方通过 `runtime` 注入必需的运行时变量（后者覆盖前者，显式可控）。
+ */
+
+/** 敏感变量后缀黑名单（大小写不敏感后缀匹配） */
+const SENSITIVE_SUFFIXES = [
+  '_API_KEY',
+  '_TOKEN',
+  '_SECRET',
+  '_PASSWORD',
+  '_PASSWD',
+  '_CREDENTIAL',
+  '_CREDENTIALS',
+  '_PRIVATE_KEY',
+] as const;
+
+/** 敏感变量名黑名单（精确匹配） */
+const SENSITIVE_KEYS = new Set([
+  'DEEPSEEK_API_KEY',
+  'AGNES_API_KEY',
+  'MIMO_API_KEY',
+  'GITEA_PASSWORD',
+  'DATABASE_PASSWORD',
+]);
+
+export interface SafeChildEnvOptions {
+  /**
+   * 调用方必需的运行时变量（如 NODE_ENV / PYTHONIOENCODING / LANG）。
+   * 在净化后的 process.env 之上覆盖写入。
+   */
+  runtime?: Record<string, string>;
+  /**
+   * 变量来源（默认 process.env；测试可注入受控快照）。
+   */
+  source?: Record<string, string | undefined>;
+}
+
+/**
+ * 构建净化后的子进程环境变量。
+ * @see 模块注释 —— 黑名单方案的设计原因与历史漂移教训
+ */
+export function buildSafeChildEnv(options: SafeChildEnvOptions = {}): Record<string, string> {
+  const source = options.source ?? process.env;
+  const env: Record<string, string> = {};
+
+  for (const [key, val] of Object.entries(source)) {
+    if (!val) continue;
+    if (SENSITIVE_KEYS.has(key)) continue;
+    if (SENSITIVE_SUFFIXES.some((suffix) => key.toUpperCase().endsWith(suffix))) continue;
+    env[key] = val;
+  }
+
+  // 运行时必需变量（显式注入，覆盖净化结果）
+  if (options.runtime) {
+    Object.assign(env, options.runtime);
+  }
+
+  return env;
+}
diff --git a/package-lock.json b/package-lock.json
index 328d8cc..718c2d8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "metona-ai-desktop",
-  "version": "0.7.2",
+  "version": "0.7.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "metona-ai-desktop",
-      "version": "0.7.2",
+      "version": "0.7.3",
       "license": "MIT",
       "dependencies": {
         "@emotion/react": "^11.14.0",
diff --git a/package.json b/package.json
index de1f70f..37af067 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "metona-ai-desktop",
-  "version": "0.7.2",
+  "version": "0.7.3",
   "description": "MetonaAI Desktop — 生产级通用 AI Agent 智能体桌面应用",
   "main": "dist-electron/main/main.js",
   "author": "Metona Team",
diff --git a/src/App.tsx b/src/App.tsx
index c914a35..d06528e 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -91,6 +91,8 @@ export default function App(): React.JSX.Element {
         .catch(() => {
           /* 读取失败保持默认 zh-CN */
         });
+      // v0.7.3 P1-4: 启动即拉取模型能力探测缓存（Ollama vision 门控数据源）
+      useAgentStore.getState().refreshModelCapabilities();
       // M-25 修复: 改用 Promise.allSettled，单个配置读取失败不影响另一个
       Promise.allSettled([
         window.metona.config.get('llm.provider'),
@@ -128,7 +130,23 @@ export default function App(): React.JSX.Element {
         .catch((err) => {
           console.error('[App] tools.isReady query failed:', err);
         });
-      return unsubscribe;
+      const offTools = unsubscribe;
+
+      // v0.7.3 P1-4: LLM 配置变更 / Ollama 模型下载完成后刷新能力探测缓存
+      const offConfig = window.metona.config?.onChanged?.((data) => {
+        if (data.key === 'llm.provider' || data.key === 'llm.model') {
+          void useAgentStore.getState().refreshModelCapabilities();
+        }
+      });
+      const offPull = window.metona.llm?.onOllamaPullEnded?.(() => {
+        void useAgentStore.getState().refreshModelCapabilities();
+      });
+
+      return () => {
+        offTools();
+        offConfig?.();
+        offPull?.();
+      };
     } else {
       // 无 IPC 可用时直接标记为就绪（避免永久禁用）
       useAgentStore.getState().setToolsReady(true);
diff --git a/src/__tests__/model-capabilities.test.ts b/src/__tests__/model-capabilities.test.ts
new file mode 100644
index 0000000..58804eb
--- /dev/null
+++ b/src/__tests__/model-capabilities.test.ts
@@ -0,0 +1,79 @@
+/**
+ * 模型能力门控测试（v0.7.3 P1-4）
+ *
+ * 锁定 supportsImageUpload 三道判定链：
+ * M1 总开关；M2 DeepSeek 非 vision 命名拒绝；M3 Ollama 能力探测
+ * （supportsVision=false 拒绝 / undefined 保守放行 / 探测缓存缺失放行）；
+ * 其余 Provider 默认放行。
+ */
+
+import { describe, it, expect } from 'vitest';
+import { supportsImageUpload } from '../lib/model-capabilities';
+
+const BASE = { multimodalEnabled: true, provider: 'deepseek', model: 'deepseek-v4-pro' };
+
+describe('supportsImageUpload', () => {
+  it('M1: 总开关关闭 → disabled（即使模型支持）', () => {
+    const r = supportsImageUpload({
+      ...BASE,
+      model: 'deepseek-v4-flash-vision-exp',
+      multimodalEnabled: false,
+    });
+    expect(r).toEqual({ allowed: false, reason: 'disabled' });
+  });
+
+  it('M2: DeepSeek 非 vision 命名 → provider-vision', () => {
+    expect(supportsImageUpload(BASE)).toEqual({ allowed: false, reason: 'provider-vision' });
+    expect(supportsImageUpload({ ...BASE, model: '' })).toEqual({
+      allowed: false,
+      reason: 'provider-vision',
+    });
+  });
+
+  it('M2b: DeepSeek vision 命名放行', () => {
+    const r = supportsImageUpload({
+      ...BASE,
+      model: 'deepseek-v4-flash-vision-exp',
+    });
+    expect(r.allowed).toBe(true);
+  });
+
+  it('M3a: Ollama 探测 supportsVision=false → probed-no-vision', () => {
+    const r = supportsImageUpload({
+      multimodalEnabled: true,
+      provider: 'ollama',
+      model: 'qwen3:latest',
+      visionCaps: { 'qwen3:latest': false, 'llava:latest': true },
+    });
+    expect(r).toEqual({ allowed: false, reason: 'probed-no-vision' });
+  });
+
+  it('M3b: Ollama 探测 true / undefined（未知）→ 保守放行', () => {
+    const base = { multimodalEnabled: true, provider: 'ollama', model: 'llava:latest' };
+    expect(supportsImageUpload({ ...base, visionCaps: { 'llava:latest': true } }).allowed).toBe(
+      true,
+    );
+    expect(supportsImageUpload({ ...base, visionCaps: { 'other:model': false } }).allowed).toBe(
+      true,
+    );
+    // 探测支持为 true 的模型放行
+  });
+
+  it('M3c: Ollama 探测缓存缺失（未加载列表）→ 放行（fail-open 保持可用性）', () => {
+    const r = supportsImageUpload({
+      multimodalEnabled: true,
+      provider: 'ollama',
+      model: 'qwen3:latest',
+      visionCaps: {},
+    });
+    expect(r.allowed).toBe(true);
+  });
+
+  it('M4: 其余 Provider（openai/anthropic/agnes/mimo）默认放行', () => {
+    for (const provider of ['openai', 'anthropic', 'agnes', 'mimo']) {
+      expect(
+        supportsImageUpload({ multimodalEnabled: true, provider, model: 'any-model' }).allowed,
+      ).toBe(true);
+    }
+  });
+});
diff --git a/src/__tests__/trace-lifecycle.test.ts b/src/__tests__/trace-lifecycle.test.ts
new file mode 100644
index 0000000..8300b52
--- /dev/null
+++ b/src/__tests__/trace-lifecycle.test.ts
@@ -0,0 +1,79 @@
+/**
+ * Trace 生命周期测试（v0.7.3 P3-3）
+ *
+ * L1 keepRecentRuns —— 按 runId 分组保留最近 N 组、首次出现顺序稳定、
+ *    无 runId 的 legacy 步骤逐条参与淘汰、未超限原样返回（引用不变）。
+ */
+
+import { describe, it, expect } from 'vitest';
+import { keepRecentRuns, MAX_TRACE_RUNS } from '../lib/trace-lifecycle';
+
+interface Step {
+  runId?: string;
+  iteration: number;
+}
+
+function makeSteps(spec: Array<[runId: string | undefined, count: number]>): Step[] {
+  const steps: Step[] = [];
+  for (const [runId, count] of spec) {
+    for (let i = 0; i < count; i++) {
+      steps.push(
+        runId === undefined ? { iteration: steps.length } : { runId, iteration: steps.length },
+      );
+    }
+  }
+  return steps;
+}
+
+describe('keepRecentRuns', () => {
+  it('L1a: 未超限时原样返回（引用不变，零开销路径）', () => {
+    const steps = makeSteps([
+      ['runA', 2],
+      ['runB', 3],
+    ]);
+    expect(keepRecentRuns(steps)).toBe(steps);
+  });
+
+  it('L1b: 超限时丢弃最旧 run 组，保留最近 N 组', () => {
+    const spec: Array<[string | undefined, number]> = [];
+    for (let i = 0; i < MAX_TRACE_RUNS + 3; i++) spec.push([`run${i}`, 2]);
+    const steps = makeSteps(spec);
+
+    const kept = keepRecentRuns(steps);
+    // 丢掉前 3 个 run 组（6 条），保留后 20 组（40 条）
+    expect(kept).toHaveLength(MAX_TRACE_RUNS * 2);
+    expect(kept.every((s) => Number(s.runId?.slice(3)) >= 3)).toBe(true);
+    // 顺序保持首次出现顺序（run3 → run22）
+    expect(kept[0].runId).toBe('run3');
+    expect(kept[kept.length - 1].runId).toBe(`run${MAX_TRACE_RUNS + 2}`);
+  });
+
+  it('L1c: 无 runId 的 legacy 步骤逐条参与淘汰（不整组豁免）', () => {
+    const spec: Array<[string | undefined, number]> = [];
+    for (let i = 0; i < MAX_TRACE_RUNS; i++) spec.push([`run${i}`, 1]);
+    spec.push([undefined, 3]); // 3 条 legacy
+    const steps = makeSteps(spec);
+
+    const kept = keepRecentRuns(steps, 5);
+    // 共 23 组（20 run + 3 legacy 伪组，legacy 按插入序排在最后），
+    // 保留最近 5 组 = run18 + run19 + 3 条 legacy
+    expect(kept).toHaveLength(5);
+    const runIds = kept.filter((s) => s.runId).map((s) => s.runId);
+    expect(runIds).toEqual(['run18', 'run19']);
+    expect(kept.filter((s) => !s.runId)).toHaveLength(3);
+  });
+
+  it('L1d: 空数组安全', () => {
+    expect(keepRecentRuns([])).toEqual([]);
+  });
+
+  it('L1e: maxRuns 自定义生效', () => {
+    const steps = makeSteps([
+      ['a', 1],
+      ['b', 1],
+      ['c', 1],
+    ]);
+    const kept = keepRecentRuns(steps, 2);
+    expect(kept.map((s) => s.runId)).toEqual(['b', 'c']);
+  });
+});
diff --git a/src/__tests__/trace-trim.test.ts b/src/__tests__/trace-trim.test.ts
new file mode 100644
index 0000000..de313d0
--- /dev/null
+++ b/src/__tests__/trace-trim.test.ts
@@ -0,0 +1,41 @@
+/**
+ * 编辑重发/重新生成的 Trace 截断测试（v0.7.3 P1-2）
+ *
+ * 前端侧：trimTraceStepsByAnchor 按 startedAt 过滤（legacy 无时间戳保守保留）。
+ * DB 侧（truncateMessagesAfter 过滤 metadata.traceSteps）在
+ * electron/services/__tests__/session-truncate-trace.test.ts 以真实 SQLite 覆盖。
+ */
+
+import { describe, it, expect } from 'vitest';
+import { trimTraceStepsByAnchor } from '../stores/agent-store';
+
+describe('trimTraceStepsByAnchor（P1-2）', () => {
+  const anchorTs = 1_000_000;
+
+  it('仅保留 startedAt < 锚点时间戳的步骤（严格小于：等值属于锚点侧必须丢弃）', () => {
+    const steps = [
+      { runId: 'r1', startedAt: 900_000 },
+      { runId: 'r2', startedAt: anchorTs }, // 恰好等于锚点 —— 锚点消息触发的 run，同毫秒落库必须判废
+      { runId: 'r3', startedAt: anchorTs + 1 },
+      { runId: 'r4', startedAt: anchorTs + 5000 },
+    ];
+    const kept = trimTraceStepsByAnchor(steps, anchorTs);
+    expect(kept.map((s) => s.runId)).toEqual(['r1']);
+  });
+
+  it('legacy 步骤缺 startedAt → 保守保留（无时间依据可判废）', () => {
+    const steps = [
+      { iteration: 1 } as { runId?: string; startedAt: number; iteration: number },
+      { runId: 'r2', startedAt: anchorTs + 1 },
+    ];
+    const kept = trimTraceStepsByAnchor(steps, anchorTs);
+    // legacy（无 startedAt）保守保留；r2 startedAt 晚于锚点 → 丢弃
+    expect(kept).toHaveLength(1);
+    expect(kept[0].runId).toBeUndefined();
+    expect(kept[0].startedAt).toBeUndefined();
+  });
+
+  it('空数组安全', () => {
+    expect(trimTraceStepsByAnchor([], anchorTs)).toEqual([]);
+  });
+});
diff --git a/src/components/chat/ChatInput.tsx b/src/components/chat/ChatInput.tsx
index fd0575b..3193e62 100644
--- a/src/components/chat/ChatInput.tsx
+++ b/src/components/chat/ChatInput.tsx
@@ -26,12 +26,19 @@ import { useAgentStore } from '@renderer/stores/agent-store';
 import { useSessionStore } from '@renderer/stores/session-store';
 import { useUIStore } from '@renderer/stores/ui-store';
 import { formatFileSize } from '@renderer/lib/formatters';
+import { PROVIDER_LABELS } from '@renderer/lib/constants';
+// v0.7.3 P1-4: 图片上传门控纯函数（总开关 × DeepSeek 命名防线 × Ollama 能力探测）
+import { supportsImageUpload } from '@renderer/lib/model-capabilities';
+// v0.7.3 P4-3: 文案出层（字典含注册副作用，须在 t() 使用前 import）
+import { t } from '@renderer/lib/i18n';
+import '@renderer/lib/i18n-strings';
 
-const SLASH_COMMANDS = [
-  { id: 'tool', label: '/tool', description: '选择工具' },
-  { id: 'memory', label: '/memory', description: '搜索记忆' },
-  { id: 'clear', label: '/clear', description: '清空会话' },
-  { id: 'export', label: '/export', description: '导出 Markdown' },
+// v0.7.3 P4-3: 描述文案渲染时求值（i18next 字典注册是异步的，模块顶层固化会拿到 key 本体）
+const SLASH_COMMANDS: Array<{ id: string; label: string; description: () => string }> = [
+  { id: 'tool', label: '/tool', description: () => t('input.slash.tool') },
+  { id: 'memory', label: '/memory', description: () => t('input.slash.memory') },
+  { id: 'clear', label: '/clear', description: () => t('input.slash.clear') },
+  { id: 'export', label: '/export', description: () => t('input.slash.export') },
 ];
 
 const IMAGE_TYPES = ['image/png', 'image/jpeg', 'image/gif', 'image/webp'];
@@ -106,15 +113,14 @@ export function ChatInput(): React.JSX.Element {
   const model = useAgentStore((s) => s.model);
   // v0.5.4: 多模态总开关（llm.multimodalEnabled，设置/引导向导中配置）
   const multimodalEnabled = useAgentStore((s) => s.multimodalEnabled);
-
-  /**
-   * v0.5.4: 图片上传双重判断 — 总开关 × 模型能力
-   * - 开关关闭：即使模型支持多模态也不能上传（显式控制）
-   * - 模型能力：DeepSeek 仅 vision 系列支持；其他五家 Provider 均支持
-   */
-  const modelSupportsImages =
-    provider !== 'deepseek' || (model.length > 0 && model.includes('vision'));
-  const supportsImages = multimodalEnabled && modelSupportsImages;
+  const modelVisionCaps = useAgentStore((s) => s.modelVisionCaps);
+  const imageGate = supportsImageUpload({
+    multimodalEnabled,
+    provider,
+    model,
+    visionCaps: modelVisionCaps,
+  });
+  const supportsImages = imageGate.allowed;
 
   // 草稿自动保存
   useEffect(() => {
@@ -163,11 +169,12 @@ export function ChatInput(): React.JSX.Element {
             reader.onerror = () => reject(new Error('文本文件读取失败'));
             reader.readAsText(headBlob);
           });
-          attachment.textContent += `\n\n[... 文件内容已截断：原始大小 ${formatFileSize(file.size)}，仅包含前 ${formatFileSize(MAX_TEXT_ATTACHMENT_BYTES)}。如需完整内容请分段处理 ...]`;
+          attachment.textContent += t('input.text.truncatedNote', {
+            size: formatFileSize(file.size),
+            limit: formatFileSize(MAX_TEXT_ATTACHMENT_BYTES),
+          });
           import('@metona-team/metona-toast')
-            .then((mod) =>
-              mod.default.warning(`文本附件 "${file.name}" 超过 512KB，已截断为前 512KB`),
-            )
+            .then((mod) => mod.default.warning(t('input.text.truncated', { name: file.name })))
             .catch(() => {});
         } else {
           attachment.textContent = await new Promise<string>((resolve, reject) => {
@@ -196,9 +203,15 @@ export function ChatInput(): React.JSX.Element {
       if (filtered.length < fileArray.length && !supportsImages) {
         const skipped = fileArray.length - filtered.length;
         // v0.5.4: 区分拒绝原因 — 开关未开启 vs 当前模型不支持
-        const reason = multimodalEnabled
-          ? `当前模型不支持图片（${provider} 需多模态模型），已跳过 ${skipped} 个图片文件`
-          : `多模态未开启（设置 → LLM 配置），已跳过 ${skipped} 个图片文件`;
+        const reason =
+          imageGate.reason === 'disabled'
+            ? t('input.image.skipped.toggle', { count: skipped })
+            : imageGate.reason === 'probed-no-vision'
+              ? t('input.image.skipped.probe', { count: skipped })
+              : t('input.image.skipped.model', {
+                  provider: PROVIDER_LABELS[provider] ?? provider,
+                  count: skipped,
+                });
         import('@metona-team/metona-toast')
           .then((mod) => {
             mod.default.warning(reason);
@@ -218,7 +231,7 @@ export function ChatInput(): React.JSX.Element {
       if (successful.length === 0) {
         import('@metona-team/metona-toast')
           .then((mod) => {
-            mod.default.error('文件读取失败，请检查文件是否损坏或被锁定');
+            mod.default.error(t('input.file.readFailed'));
           })
           .catch(() => {});
         return;
@@ -227,7 +240,7 @@ export function ChatInput(): React.JSX.Element {
         const failedCount = filtered.length - successful.length;
         import('@metona-team/metona-toast')
           .then((mod) => {
-            mod.default.warning(`${failedCount} 个文件读取失败，已跳过`);
+            mod.default.warning(t('input.file.partialFailed', { count: failedCount }));
           })
           .catch(() => {});
       }
@@ -522,7 +535,7 @@ export function ChatInput(): React.JSX.Element {
                 </span>
                 <span style={{ fontFamily: 'monospace', fontSize: 12 }}>{cmd.label}</span>
                 <span style={{ color: 'var(--text-secondary, #64748b)', fontSize: 11 }}>
-                  {cmd.description}
+                  {cmd.description()}
                 </span>
               </div>
             ))}
@@ -554,9 +567,9 @@ export function ChatInput(): React.JSX.Element {
           placeholder={
             configLoaded
               ? toolsReady
-                ? '输入消息... (Cmd/Ctrl+Enter 发送, Cmd/Ctrl+Shift+Enter 换行, / 命令)'
-                : '工具加载中...'
-              : '正在加载配置...'
+                ? t('input.placeholder.ready')
+                : t('input.placeholder.toolsLoading')
+              : t('input.placeholder.configLoading')
           }
           disabled={isStreaming || !configLoaded || !toolsReady}
           multiline
@@ -608,7 +621,7 @@ export function ChatInput(): React.JSX.Element {
                 onClick={handleAbort}
                 sx={{ height: 28, fontSize: 12 }}
               >
-                <Square size={12} style={{ marginRight: 6 }} /> 中断
+                <Square size={12} style={{ marginRight: 6 }} /> {t('input.abort')}
               </Button>
             ) : (
               <Button
@@ -627,7 +640,7 @@ export function ChatInput(): React.JSX.Element {
                       : 0.5,
                 }}
               >
-                <Send size={12} style={{ marginRight: 6 }} /> 发送
+                <Send size={12} style={{ marginRight: 6 }} /> {t('input.send')}
               </Button>
             )}
           </Stack>
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index a44c9dc..9750ac1 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -96,6 +96,19 @@ export function Sidebar(): React.JSX.Element {
     };
   }, []);
 
+  // v0.7.3 P4-1: 主进程 LLM 标题生成完成后经 config:changed 广播
+  // （合成 key：session.title.<sessionId>），此处消费并刷新侧栏标题
+  useEffect(() => {
+    if (!window.metona?.config?.onChanged) return;
+    const unsubscribe = window.metona.config.onChanged((data) => {
+      const match = /^session\.title\.(.+)$/.exec(data.key);
+      if (match && typeof data.value === 'string' && data.value) {
+        useSessionStore.getState().updateSession(match[1], { title: data.value });
+      }
+    });
+    return unsubscribe;
+  }, []);
+
   // v0.5.0: 搜索词变化时防抖查询会话内容（FTS5 全文搜索，300ms 防抖减少 IPC 频率）
   useEffect(() => {
     const q = searchQuery.trim();
diff --git a/src/components/memory/MemoryViewer.tsx b/src/components/memory/MemoryViewer.tsx
index 695f0cf..ad947c0 100644
--- a/src/components/memory/MemoryViewer.tsx
+++ b/src/components/memory/MemoryViewer.tsx
@@ -7,13 +7,25 @@
 
 import { useState, useEffect, useRef, useCallback } from 'react';
 import {
-  Box, Typography, Stack, Accordion, AccordionSummary, AccordionDetails,
-  IconButton, TextField, Chip, Alert, InputAdornment,
+  Box,
+  Typography,
+  Stack,
+  Accordion,
+  AccordionSummary,
+  AccordionDetails,
+  IconButton,
+  TextField,
+  Chip,
+  Alert,
+  InputAdornment,
 } from '@mui/material';
 import { Brain, Search, Trash2, ChevronDown } from 'lucide-react';
 import { useAgentStore } from '@renderer/stores/agent-store';
 import { useUIStore } from '@renderer/stores/ui-store';
 import { formatTime, truncate } from '@renderer/lib/formatters';
+// v0.7.3 P4-3: 文案出层（字典含注册副作用，须在 t() 使用前 import）
+import { t } from '@renderer/lib/i18n';
+import '@renderer/lib/i18n-strings';
 
 // ===== 类型 =====
 
@@ -43,11 +55,13 @@ interface SearchResult {
 
 const MEMORY_TYPES: MemoryType[] = ['episodic', 'semantic', 'working'];
 
-const MEMORY_TYPE_LABELS: Record<MemoryType, string> = {
-  episodic: '情景记忆',
-  semantic: '语义记忆',
-  working: '工作记忆',
+// v0.7.3 P4-3: 类型标签渲染时求值（i18next 字典注册是异步的，模块顶层固化会拿到 key 本体）
+const MEMORY_TYPE_LABEL_KEYS: Record<MemoryType, string> = {
+  episodic: 'memory.type.episodic',
+  semantic: 'memory.type.semantic',
+  working: 'memory.type.working',
 };
+const memoryTypeLabel = (type: MemoryType): string => t(MEMORY_TYPE_LABEL_KEYS[type]);
 
 const MEMORY_TYPE_COLORS: Record<MemoryType, string> = {
   episodic: '#22d3ee',
@@ -73,7 +87,9 @@ function getId(item: MemoryItem): string {
 
 export function MemoryViewer(): React.JSX.Element {
   const [memories, setMemories] = useState<Record<MemoryType, MemoryItem[]>>({
-    episodic: [], semantic: [], working: [],
+    episodic: [],
+    semantic: [],
+    working: [],
   });
   const [searchQuery, setSearchQuery] = useState('');
   const [searchResults, setSearchResults] = useState<SearchResult[] | null>(null);
@@ -108,7 +124,7 @@ export function MemoryViewer(): React.JSX.Element {
       // 竞态保护：若已被新请求取代或组件已卸载，放弃本次结果
       if (loadReqIdRef.current !== reqId) return;
       if (!res.success) {
-        setError(res.error ?? '加载记忆失败');
+        setError(res.error ?? t('memory.loadFailed'));
         return;
       }
       const data = res.data ?? {};
@@ -119,7 +135,7 @@ export function MemoryViewer(): React.JSX.Element {
       });
     } catch (err) {
       if (loadReqIdRef.current !== reqId) return;
-      setError((err as Error).message ?? '加载记忆失败');
+      setError((err as Error).message ?? t('memory.loadFailed'));
     }
   }, []);
 
@@ -127,7 +143,9 @@ export function MemoryViewer(): React.JSX.Element {
   useEffect(() => {
     loadMemories();
     // cleanup: 使当前请求失效（防止卸载后 setState）
-    return () => { loadReqIdRef.current++; };
+    return () => {
+      loadReqIdRef.current++;
+    };
   }, [loadMemories]);
 
   // Agent 完成自动刷新
@@ -161,7 +179,7 @@ export function MemoryViewer(): React.JSX.Element {
       setSearchResults(results);
     } catch (err) {
       if (searchReqIdRef.current !== reqId) return;
-      setError((err as Error).message ?? '搜索失败');
+      setError((err as Error).message ?? t('memory.loadFailed'));
       setSearchResults([]);
     } finally {
       // 审计补充修复: 无条件清理 searching 状态，避免被 loadMemories 取代时卡死
@@ -181,29 +199,42 @@ export function MemoryViewer(): React.JSX.Element {
       const res = await window.metona.memory.delete(type, id);
       if (!res.success) {
         // 用户主动操作失败应用 toast（与项目惯例一致），不污染加载/搜索的 Alert
-        import('@metona-team/metona-toast').then((mod) => mod.default.error(res.error ?? '删除失败')).catch(() => {});
+        import('@metona-team/metona-toast')
+          .then((mod) => mod.default.error(res.error ?? t('memory.deleteFailed')))
+          .catch(() => {});
         return;
       }
       await loadMemories();
     } catch (err) {
-      import('@metona-team/metona-toast').then((mod) => mod.default.error((err as Error).message ?? '删除失败')).catch(() => {});
+      import('@metona-team/metona-toast')
+        .then((mod) => mod.default.error((err as Error).message ?? t('memory.deleteFailed')))
+        .catch(() => {});
     }
   };
 
-  const totalCount =
-    memories.episodic.length + memories.semantic.length + memories.working.length;
+  const totalCount = memories.episodic.length + memories.semantic.length + memories.working.length;
 
   // 搜索结果视图
   if (searchResults !== null) {
     return (
-      <Box sx={{ flex: 1, display: 'flex', flexDirection: 'column', overflow: 'hidden', minHeight: 0 }}>
+      <Box
+        sx={{ flex: 1, display: 'flex', flexDirection: 'column', overflow: 'hidden', minHeight: 0 }}
+      >
         <Stack direction="row" spacing={1} sx={{ mb: 1.5, flexShrink: 0, alignItems: 'center' }}>
           <Brain size={14} style={{ color: '#a855f7' }} />
-          <Typography variant="caption" sx={{ fontWeight: 600, textTransform: 'uppercase', letterSpacing: 1, color: 'text.secondary' }}>
-            记忆搜索
+          <Typography
+            variant="caption"
+            sx={{
+              fontWeight: 600,
+              textTransform: 'uppercase',
+              letterSpacing: 1,
+              color: 'text.secondary',
+            }}
+          >
+            {t('memory.search.title')}
           </Typography>
           <Typography variant="caption" sx={{ ml: 'auto', color: 'text.disabled', fontSize: 10 }}>
-            {searchResults.length} 条结果
+            {t('memory.results', { count: searchResults.length })}
           </Typography>
         </Stack>
 
@@ -212,9 +243,15 @@ export function MemoryViewer(): React.JSX.Element {
           fullWidth
           value={searchQuery}
           onChange={(e) => setSearchQuery(e.target.value)}
-          onKeyDown={(e) => { if (e.key === 'Enter') handleSearch(); }}
-          placeholder="搜索记忆..."
-          sx={{ mb: 1.5, flexShrink: 0, '& .MuiOutlinedInput-root': { fontSize: 11, height: 30, borderRadius: 1.5 } }}
+          onKeyDown={(e) => {
+            if (e.key === 'Enter') handleSearch();
+          }}
+          placeholder={t('memory.search.placeholder')}
+          sx={{
+            mb: 1.5,
+            flexShrink: 0,
+            '& .MuiOutlinedInput-root': { fontSize: 11, height: 30, borderRadius: 1.5 },
+          }}
           slotProps={{
             input: {
               startAdornment: (
@@ -223,24 +260,49 @@ export function MemoryViewer(): React.JSX.Element {
                 </InputAdornment>
               ),
               endAdornment: searchQuery ? (
-                <InputAdornment position="end" sx={{ cursor: 'pointer' }} onClick={handleClearSearch}>
-                  <Typography variant="caption" sx={{ fontSize: 10, color: 'text.secondary' }}>清除</Typography>
+                <InputAdornment
+                  position="end"
+                  sx={{ cursor: 'pointer' }}
+                  onClick={handleClearSearch}
+                >
+                  <Typography variant="caption" sx={{ fontSize: 10, color: 'text.secondary' }}>
+                    {t('memory.search.clear')}
+                  </Typography>
                 </InputAdornment>
               ) : null,
             },
           }}
         />
 
-        {error && <Alert severity="error" sx={{ mb: 1, py: 0.5, fontSize: 11, flexShrink: 0 }}>{error}</Alert>}
+        {error && (
+          <Alert severity="error" sx={{ mb: 1, py: 0.5, fontSize: 11, flexShrink: 0 }}>
+            {error}
+          </Alert>
+        )}
 
-        <Box sx={{ flex: 1, overflowY: 'auto', display: 'flex', flexDirection: 'column', gap: 0.5, minHeight: 0 }}>
+        <Box
+          sx={{
+            flex: 1,
+            overflowY: 'auto',
+            display: 'flex',
+            flexDirection: 'column',
+            gap: 0.5,
+            minHeight: 0,
+          }}
+        >
           {searching ? (
-            <Typography variant="caption" sx={{ textAlign: 'center', py: 2, color: 'text.disabled' }}>
-              搜索中...
+            <Typography
+              variant="caption"
+              sx={{ textAlign: 'center', py: 2, color: 'text.disabled' }}
+            >
+              {t('memory.searching')}
             </Typography>
           ) : searchResults.length === 0 ? (
-            <Typography variant="caption" sx={{ textAlign: 'center', py: 2, color: 'text.disabled' }}>
-              无匹配结果
+            <Typography
+              variant="caption"
+              sx={{ textAlign: 'center', py: 2, color: 'text.disabled' }}
+            >
+              {t('memory.search.empty')}
             </Typography>
           ) : (
             searchResults.map((r) => (
@@ -254,14 +316,24 @@ export function MemoryViewer(): React.JSX.Element {
 
   // 全量列表视图
   return (
-    <Box sx={{ flex: 1, display: 'flex', flexDirection: 'column', overflow: 'hidden', minHeight: 0 }}>
+    <Box
+      sx={{ flex: 1, display: 'flex', flexDirection: 'column', overflow: 'hidden', minHeight: 0 }}
+    >
       <Stack direction="row" spacing={1} sx={{ mb: 1.5, flexShrink: 0, alignItems: 'center' }}>
         <Brain size={14} style={{ color: '#a855f7' }} />
-        <Typography variant="caption" sx={{ fontWeight: 600, textTransform: 'uppercase', letterSpacing: 1, color: 'text.secondary' }}>
-          记忆库
+        <Typography
+          variant="caption"
+          sx={{
+            fontWeight: 600,
+            textTransform: 'uppercase',
+            letterSpacing: 1,
+            color: 'text.secondary',
+          }}
+        >
+          {t('memory.list.title')}
         </Typography>
         <Typography variant="caption" sx={{ ml: 'auto', color: 'text.disabled', fontSize: 10 }}>
-          {totalCount} 条
+          {t('memory.total', { count: totalCount })}
         </Typography>
       </Stack>
 
@@ -270,9 +342,15 @@ export function MemoryViewer(): React.JSX.Element {
         fullWidth
         value={searchQuery}
         onChange={(e) => setSearchQuery(e.target.value)}
-        onKeyDown={(e) => { if (e.key === 'Enter') handleSearch(); }}
-        placeholder="搜索记忆..."
-        sx={{ mb: 1.5, flexShrink: 0, '& .MuiOutlinedInput-root': { fontSize: 11, height: 30, borderRadius: 1.5 } }}
+        onKeyDown={(e) => {
+          if (e.key === 'Enter') handleSearch();
+        }}
+        placeholder={t('memory.search.placeholder')}
+        sx={{
+          mb: 1.5,
+          flexShrink: 0,
+          '& .MuiOutlinedInput-root': { fontSize: 11, height: 30, borderRadius: 1.5 },
+        }}
         slotProps={{
           input: {
             startAdornment: (
@@ -284,11 +362,18 @@ export function MemoryViewer(): React.JSX.Element {
         }}
       />
 
-      {error && <Alert severity="error" sx={{ mb: 1, py: 0.5, fontSize: 11, flexShrink: 0 }}>{error}</Alert>}
+      {error && (
+        <Alert severity="error" sx={{ mb: 1, py: 0.5, fontSize: 11, flexShrink: 0 }}>
+          {error}
+        </Alert>
+      )}
 
       <Box sx={{ flex: 1, overflowY: 'auto', minHeight: 0 }}>
         {totalCount === 0 ? (
-          <Typography variant="caption" sx={{ textAlign: 'center', py: 4, display: 'block', color: 'text.disabled' }}>
+          <Typography
+            variant="caption"
+            sx={{ textAlign: 'center', py: 4, display: 'block', color: 'text.disabled' }}
+          >
             暂无记忆数据
           </Typography>
         ) : (
@@ -320,16 +405,31 @@ export function MemoryViewer(): React.JSX.Element {
               >
                 <AccordionSummary expandIcon={<ChevronDown size={14} />}>
                   <Stack direction="row" spacing={1} sx={{ alignItems: 'center', width: '100%' }}>
-                    <Box sx={{ width: 6, height: 6, borderRadius: '50%', bgcolor: MEMORY_TYPE_COLORS[type], flexShrink: 0 }} />
-                    <Typography variant="caption" sx={{ fontWeight: 600, fontSize: 11, color: 'text.primary' }}>
-                      {MEMORY_TYPE_LABELS[type]}
+                    <Box
+                      sx={{
+                        width: 6,
+                        height: 6,
+                        borderRadius: '50%',
+                        bgcolor: MEMORY_TYPE_COLORS[type],
+                        flexShrink: 0,
+                      }}
+                    />
+                    <Typography
+                      variant="caption"
+                      sx={{ fontWeight: 600, fontSize: 11, color: 'text.primary' }}
+                    >
+                      {memoryTypeLabel(type)}
                     </Typography>
                     <Chip
                       label={items.length}
                       size="small"
                       sx={{
-                        ml: 'auto', mr: 0.5, height: 16, fontSize: 10,
-                        bgcolor: 'action.hover', color: 'text.secondary',
+                        ml: 'auto',
+                        mr: 0.5,
+                        height: 16,
+                        fontSize: 10,
+                        bgcolor: 'action.hover',
+                        color: 'text.secondary',
                         '& .MuiChip-label': { px: 0.5 },
                       }}
                     />
@@ -366,17 +466,22 @@ function MemoryItemRow({
   return (
     <Box
       sx={{
-        px: 1, py: 0.75, borderRadius: 1,
-        bgcolor: 'background.default', border: '1px solid', borderColor: 'divider',
+        px: 1,
+        py: 0.75,
+        borderRadius: 1,
+        bgcolor: 'background.default',
+        border: '1px solid',
+        borderColor: 'divider',
         '&:hover .delete-btn': { opacity: 1 },
       }}
     >
       <Stack direction="row" spacing={0.5} sx={{ mb: 0.25, alignItems: 'center' }}>
         <Chip
-          label={MEMORY_TYPE_LABELS[type]}
+          label={memoryTypeLabel(type)}
           size="small"
           sx={{
-            height: 14, fontSize: 9,
+            height: 14,
+            fontSize: 9,
             bgcolor: MEMORY_TYPE_COLORS[type] + '22',
             color: MEMORY_TYPE_COLORS[type],
             '& .MuiChip-label': { px: 0.5 },
@@ -387,7 +492,8 @@ function MemoryItemRow({
             label={`I ${(item.importance ?? 0).toFixed(2)}`}
             size="small"
             sx={{
-              height: 14, fontSize: 9,
+              height: 14,
+              fontSize: 9,
               bgcolor: importanceColor(item.importance) + '22',
               color: importanceColor(item.importance),
               '& .MuiChip-label': { px: 0.5, fontFamily: 'monospace' },
@@ -406,12 +512,26 @@ function MemoryItemRow({
           className="delete-btn"
           size="small"
           onClick={() => onDelete(type, getId(item))}
-          sx={{ opacity: 0, transition: 'opacity 150ms', p: 0.25, '&:hover': { color: 'error.main' } }}
+          sx={{
+            opacity: 0,
+            transition: 'opacity 150ms',
+            p: 0.25,
+            '&:hover': { color: 'error.main' },
+          }}
         >
           <Trash2 size={11} />
         </IconButton>
       </Stack>
-      <Typography variant="caption" sx={{ fontSize: 11, color: 'text.primary', display: 'block', lineHeight: 1.4, wordBreak: 'break-word' }}>
+      <Typography
+        variant="caption"
+        sx={{
+          fontSize: 11,
+          color: 'text.primary',
+          display: 'block',
+          lineHeight: 1.4,
+          wordBreak: 'break-word',
+        }}
+      >
         {truncate(item.content, 100)}
       </Typography>
     </Box>
@@ -428,17 +548,22 @@ function MemorySearchItem({
   return (
     <Box
       sx={{
-        px: 1, py: 0.75, borderRadius: 1,
-        bgcolor: 'background.default', border: '1px solid', borderColor: 'divider',
+        px: 1,
+        py: 0.75,
+        borderRadius: 1,
+        bgcolor: 'background.default',
+        border: '1px solid',
+        borderColor: 'divider',
         '&:hover .delete-btn': { opacity: 1 },
       }}
     >
       <Stack direction="row" spacing={0.5} sx={{ mb: 0.25, alignItems: 'center' }}>
         <Chip
-          label={MEMORY_TYPE_LABELS[item.type]}
+          label={memoryTypeLabel(item.type)}
           size="small"
           sx={{
-            height: 14, fontSize: 9,
+            height: 14,
+            fontSize: 9,
             bgcolor: MEMORY_TYPE_COLORS[item.type] + '22',
             color: MEMORY_TYPE_COLORS[item.type],
             '& .MuiChip-label': { px: 0.5 },
@@ -448,8 +573,10 @@ function MemorySearchItem({
           label={`R ${(item.relevanceScore ?? 0).toFixed(2)}`}
           size="small"
           sx={{
-            height: 14, fontSize: 9,
-            bgcolor: '#22d3ee22', color: '#22d3ee',
+            height: 14,
+            fontSize: 9,
+            bgcolor: '#22d3ee22',
+            color: '#22d3ee',
             '& .MuiChip-label': { px: 0.5, fontFamily: 'monospace' },
           }}
         />
@@ -457,14 +584,18 @@ function MemorySearchItem({
           label={`I ${(item.importance ?? 0).toFixed(2)}`}
           size="small"
           sx={{
-            height: 14, fontSize: 9,
+            height: 14,
+            fontSize: 9,
             bgcolor: importanceColor(item.importance) + '22',
             color: importanceColor(item.importance),
             '& .MuiChip-label': { px: 0.5, fontFamily: 'monospace' },
           }}
         />
         {item.createdAt > 0 && (
-          <Typography variant="caption" sx={{ ml: 'auto', fontSize: 9, color: 'text.disabled', fontFamily: 'monospace' }}>
+          <Typography
+            variant="caption"
+            sx={{ ml: 'auto', fontSize: 9, color: 'text.disabled', fontFamily: 'monospace' }}
+          >
             {formatTime(item.createdAt)}
           </Typography>
         )}
@@ -473,12 +604,26 @@ function MemorySearchItem({
           size="small"
           aria-label="删除该记忆"
           onClick={() => onDelete(item.type, item.id)}
-          sx={{ opacity: 0, transition: 'opacity 150ms', p: 0.25, '&:hover': { color: 'error.main' } }}
+          sx={{
+            opacity: 0,
+            transition: 'opacity 150ms',
+            p: 0.25,
+            '&:hover': { color: 'error.main' },
+          }}
         >
           <Trash2 size={11} />
         </IconButton>
       </Stack>
-      <Typography variant="caption" sx={{ fontSize: 11, color: 'text.primary', display: 'block', lineHeight: 1.4, wordBreak: 'break-word' }}>
+      <Typography
+        variant="caption"
+        sx={{
+          fontSize: 11,
+          color: 'text.primary',
+          display: 'block',
+          lineHeight: 1.4,
+          wordBreak: 'break-word',
+        }}
+      >
         {truncate(item.content, 100)}
       </Typography>
     </Box>
diff --git a/src/components/onboarding/OnboardingWizard.tsx b/src/components/onboarding/OnboardingWizard.tsx
index d589642..198febb 100644
--- a/src/components/onboarding/OnboardingWizard.tsx
+++ b/src/components/onboarding/OnboardingWizard.tsx
@@ -27,8 +27,19 @@ import { ArrowRight, ArrowLeft, CheckCircle, Eye, EyeOff } from 'lucide-react';
 import { useUIStore } from '@renderer/stores/ui-store';
 import { useAgentStore } from '@renderer/stores/agent-store';
 import { PROVIDER_URLS } from '@renderer/components/settings/useConfig';
+// v0.7.3 P4-3: 文案出层（字典含注册副作用，须在 t() 使用前 import）
+import { t } from '@renderer/lib/i18n';
+import '@renderer/lib/i18n-strings';
 
-const STEPS = ['欢迎', '配置 LLM', '自定义 Agent', '工作空间', '开始使用'];
+// v0.7.3 P4-3: 步骤文案渲染时求值（i18next 字典注册是异步的，模块顶层固化会拿到 key 本体）
+const STEP_KEYS = [
+  'onboarding.step.welcome',
+  'onboarding.step.llm',
+  'onboarding.step.agent',
+  'onboarding.step.workspace',
+  'onboarding.step.done',
+] as const;
+const STEPS = STEP_KEYS.map((k) => k); // 供长度/索引判断
 
 // #48 修复: Onboarding 进度持久化 key
 const ONBOARDING_PROGRESS_KEY = 'onboarding_progress';
@@ -152,7 +163,7 @@ export function OnboardingWizard(): React.JSX.Element | null {
         if (r && !r.success) {
           console.error('[OnboardingWizard]', 'Batch config save failed:', r.error);
           import('@metona-team/metona-toast')
-            .then((mod) => mod.default.error(r.error ?? '配置保存失败，请重试'))
+            .then((mod) => mod.default.error(r.error ?? t('onboarding.toast.saveFailed')))
             .catch(() => {});
           return;
         }
@@ -177,7 +188,11 @@ export function OnboardingWizard(): React.JSX.Element | null {
       console.error('[OnboardingWizard]', 'Failed to save configuration:', err);
       // 用户主动操作失败必须有反馈，否则向导不关闭、用户卡死
       import('@metona-team/metona-toast')
-        .then((mod) => mod.default.error(`保存配置失败：${(err as Error).message}`))
+        .then((mod) =>
+          mod.default.error(
+            t('onboarding.toast.saveFailedWithReason', { message: (err as Error).message }),
+          ),
+        )
         .catch(() => {});
     }
   };
@@ -194,9 +209,9 @@ export function OnboardingWizard(): React.JSX.Element | null {
           alternativeLabel
           sx={{ '& .MuiStepLabel-label': { fontSize: 11 } }}
         >
-          {STEPS.map((s) => (
-            <Step key={s}>
-              <StepLabel>{s}</StepLabel>
+          {STEP_KEYS.map((key) => (
+            <Step key={key}>
+              <StepLabel>{t(key)}</StepLabel>
             </Step>
           ))}
         </Stepper>
@@ -219,21 +234,21 @@ export function OnboardingWizard(): React.JSX.Element | null {
               sx={{ width: 64, height: 64, mx: 'auto', mb: 2, borderRadius: 2 }}
             />
             <Typography variant="h6" sx={{ mb: 1 }}>
-              欢迎使用 MetonaAI Desktop
+              {t('onboarding.welcome.title')}
             </Typography>
             <Typography variant="body2" sx={{ color: 'text.secondary', mb: 2 }}>
-              生产级通用 AI Agent 智能体桌面应用，支持多轮对话、工具调用、记忆系统和 MCP 协议集成。
+              {t('onboarding.welcome.body')}
             </Typography>
-            <Typography variant="caption">让我们花 1 分钟完成初始配置。</Typography>
+            <Typography variant="caption">{t('onboarding.welcome.hint')}</Typography>
           </Box>
         )}
         {step === 1 && (
           <Box sx={{ width: '100%' }}>
             <Typography variant="h6" sx={{ mb: 2 }}>
-              配置 LLM Provider
+              {t('onboarding.llm.title')}
             </Typography>
             <Typography variant="body2" sx={{ color: 'text.secondary', mb: 2 }}>
-              选择 Provider 并填写 API 信息。Base URL 和模型名称支持任意输入。
+              {t('onboarding.llm.body')}
             </Typography>
             <Stack spacing={2}>
               <FormControl size="small">
@@ -279,11 +294,11 @@ export function OnboardingWizard(): React.JSX.Element | null {
               />
               <TextField
                 size="small"
-                label="API Key"
+                label={t('llm.apiKey.label')}
                 type={showKey ? 'text' : 'password'}
                 value={apiKey}
                 onChange={(e) => setApiKey(e.target.value)}
-                placeholder="sk-...（本地模型可留空）"
+                placeholder={t('onboarding.llm.apiKey.placeholder')}
                 slotProps={{
                   input: {
                     endAdornment: (
@@ -299,7 +314,9 @@ export function OnboardingWizard(): React.JSX.Element | null {
               <TextField
                 size="small"
                 label={
-                  provider === 'ollama' ? '上下文长度 (num_ctx)' : '上下文窗口 (contextWindow)'
+                  provider === 'ollama'
+                    ? t('onboarding.llm.ctx.ollama')
+                    : t('onboarding.llm.ctx.window')
                 }
                 type="number"
                 value={contextWindow ?? ''}
@@ -309,17 +326,17 @@ export function OnboardingWizard(): React.JSX.Element | null {
                 }}
                 placeholder={
                   provider === 'ollama'
-                    ? '默认由模型决定（如 2048、4096、128000）'
-                    : '如 64000、128000、1000000'
+                    ? t('onboarding.llm.ctx.ollamaPlaceholder')
+                    : t('onboarding.llm.ctx.placeholder')
                 }
                 slotProps={{ htmlInput: { min: ctxMin, step: ctxMin } }}
                 error={ctxError}
                 helperText={
                   ctxError
-                    ? `最小值为 ${ctxMin}`
+                    ? t('onboarding.llm.ctx.minError', { min: ctxMin })
                     : provider === 'ollama'
                       ? ' '
-                      : '用于上下文压缩判断，不传给 API'
+                      : t('onboarding.llm.ctx.helper')
                 }
               />
               {/* v0.5.4: 多模态总开关 — 未开启时即使模型支持也不能上传图片 */}
@@ -333,9 +350,9 @@ export function OnboardingWizard(): React.JSX.Element | null {
                 }
                 label={
                   <Stack>
-                    <Typography variant="body2">启用多模态（图片输入）</Typography>
+                    <Typography variant="body2">{t('onboarding.llm.multimodal.label')}</Typography>
                     <Typography variant="caption" sx={{ color: 'text.disabled' }}>
-                      开启后可在输入框上传图片；DeepSeek 需 vision 系列模型
+                      {t('onboarding.llm.multimodal.helper')}
                     </Typography>
                   </Stack>
                 }
@@ -347,10 +364,10 @@ export function OnboardingWizard(): React.JSX.Element | null {
         {step === 2 && (
           <Box sx={{ width: '100%' }}>
             <Typography variant="h6" sx={{ mb: 2 }}>
-              自定义 Agent
+              {t('onboarding.agent.title')}
             </Typography>
             <Typography variant="body2" sx={{ color: 'text.secondary', mb: 2 }}>
-              编辑工作空间中的 SOUL.md 文件来定义 Agent 的身份和性格。
+              {t('onboarding.agent.body')}
             </Typography>
             <Box
               sx={{
@@ -365,11 +382,10 @@ export function OnboardingWizard(): React.JSX.Element | null {
               }}
             >
               <div>
-                <strong style={{ color: '#e1e4ed' }}>SOUL.md</strong> — 定义 Agent
-                的身份、性格、核心价值观
+                <strong style={{ color: '#e1e4ed' }}>{t('onboarding.agent.soulLabel')}</strong>
               </div>
               <div style={{ marginTop: 8, fontSize: 11, opacity: 0.7 }}>
-                此步骤可稍后在工作空间目录中完成。
+                {t('onboarding.agent.soulHint')}
               </div>
             </Box>
           </Box>
@@ -377,17 +393,17 @@ export function OnboardingWizard(): React.JSX.Element | null {
         {step === 3 && (
           <Box sx={{ width: '100%' }}>
             <Typography variant="h6" sx={{ mb: 2 }}>
-              工作空间
+              {t('onboarding.workspace.title')}
             </Typography>
             <Typography variant="body2" sx={{ color: 'text.secondary', mb: 2 }}>
-              选择工作空间目录，或使用默认路径。
+              {t('onboarding.workspace.body')}
             </Typography>
             <Stack direction="row" spacing={1} sx={{ mb: 2, alignItems: 'center' }}>
               <TextField
                 size="small"
                 value={workspacePath}
                 onChange={(e) => setWorkspacePath(e.target.value)}
-                placeholder="~/MetonaWorkspaces/default/"
+                placeholder={t('onboarding.workspace.placeholder')}
                 sx={{ flex: 1 }}
               />
               <Button
@@ -401,17 +417,17 @@ export function OnboardingWizard(): React.JSX.Element | null {
                     } catch (err) {
                       console.error('[OnboardingWizard]', err);
                       import('@metona-team/metona-toast')
-                        .then((mod) => mod.default.error('选择文件夹失败'))
+                        .then((mod) => mod.default.error(t('onboarding.toast.folderFailed')))
                         .catch(() => {});
                     }
                   }
                 }}
               >
-                选择文件夹
+                {t('onboarding.workspace.pick')}
               </Button>
             </Stack>
             <Typography variant="caption" sx={{ color: 'text.secondary' }}>
-              包含 SOUL.md、MEMORY.md 两个必需文件，首次打开时自动创建。
+              {t('onboarding.workspace.helper')}
             </Typography>
           </Box>
         )}
@@ -419,12 +435,12 @@ export function OnboardingWizard(): React.JSX.Element | null {
           <Box sx={{ textAlign: 'center' }}>
             <CheckCircle size={48} style={{ color: '#34d399', margin: '0 auto 16px' }} />
             <Typography variant="h6" sx={{ mb: 1 }}>
-              配置完成！
+              {t('onboarding.done.title')}
             </Typography>
             <Typography variant="body2" sx={{ color: 'text.secondary', mb: 1 }}>
-              MetonaAI Desktop 已准备就绪。开始与你的 AI Agent 对话吧！
+              {t('onboarding.done.body')}
             </Typography>
-            <Typography variant="caption">按 Ctrl+Enter 发送消息，输入 / 查看命令列表</Typography>
+            <Typography variant="caption">{t('onboarding.done.hint')}</Typography>
           </Box>
         )}
       </DialogContent>
@@ -445,7 +461,7 @@ export function OnboardingWizard(): React.JSX.Element | null {
           size="small"
           sx={{ color: 'text.secondary' }}
         >
-          上一步
+          {t('onboarding.prev')}
         </Button>
         <Button
           variant="contained"
@@ -453,7 +469,7 @@ export function OnboardingWizard(): React.JSX.Element | null {
           onClick={handleNext}
           size="small"
         >
-          {step === STEPS.length - 1 ? '开始使用' : '下一步'}
+          {step === STEPS.length - 1 ? t('onboarding.finish') : t('onboarding.next')}
         </Button>
       </Box>
     </Dialog>
diff --git a/src/components/settings/AgentSettings.tsx b/src/components/settings/AgentSettings.tsx
index 5e44326..f162634 100644
--- a/src/components/settings/AgentSettings.tsx
+++ b/src/components/settings/AgentSettings.tsx
@@ -23,6 +23,8 @@ export function AgentSettings() {
   const [timeout, setTimeout_] = useConfig('agent.totalTimeoutMs', 600000);
   const [thinking, setThinking] = useConfig('agent.enableThinking', true);
   const [thinkingEffort, setThinkingEffort] = useConfig('agent.thinkingEffort', 'high');
+  // v0.7.3 P3-1: REFLECTING 状态开关（引擎侧 agent.enableReflection，默认关闭）
+  const [reflection, setReflection] = useConfig('agent.enableReflection', false);
   const [confirmTimeout, setConfirmTimeout] = useConfig('agent.confirmationTimeoutMs', 120000);
   const [toolExecTimeout, setToolExecTimeout] = useConfig('agent.toolExecutionTimeoutMs', 120000);
 
@@ -107,6 +109,27 @@ export function AgentSettings() {
           </Select>
         </FormControl>
       )}
+      {/* v0.7.3 P3-1: enableReflection 接线（此前为死配置）— 引擎 REFLECTING 状态开关 */}
+      <FormControlLabel
+        control={
+          <Checkbox
+            checked={reflection}
+            onChange={(e) => setReflection(e.target.checked)}
+            size="small"
+          />
+        }
+        label={
+          <Typography variant="body2">
+            启用反思阶段（REFLECTING）
+            <Typography
+              variant="caption"
+              sx={{ display: 'block', color: 'text.disabled', fontSize: 10 }}
+            >
+              每轮工具执行后进入反思状态，存在失败结果时记录告警（不阻断执行）
+            </Typography>
+          </Typography>
+        }
+      />
     </Stack>
   );
 }
diff --git a/src/components/settings/LLMSettings.tsx b/src/components/settings/LLMSettings.tsx
index af8f3e4..5b628da 100644
--- a/src/components/settings/LLMSettings.tsx
+++ b/src/components/settings/LLMSettings.tsx
@@ -28,6 +28,9 @@ import {
 import { Eye, EyeOff } from 'lucide-react';
 import { useAgentStore } from '@renderer/stores/agent-store';
 import { PROVIDER_LABELS } from '@renderer/lib/constants';
+// v0.7.3 P4-3: 文案出层（字典含注册副作用，须在 t() 使用前 import）
+import { t } from '@renderer/lib/i18n';
+import '@renderer/lib/i18n-strings';
 import { PROVIDER_URLS } from './useConfig';
 
 /** v0.7.2 P3-9: 动态模型条目（渲染端子集，与 global.d.ts MetonaModelInfoLite 对齐） */
@@ -99,9 +102,11 @@ export function LLMSettings() {
       if (r.success && r.data) {
         setModelOptions(r.data);
         setModelsLoaded(true);
+        // v0.7.3 P1-4: 同步能力探测缓存（Ollama supportsVision → 上传门控数据源）
+        useAgentStore.getState().applyModelCapabilities(r.data);
       } else {
         setModelOptions([]);
-        setModelsError(r.error ?? '获取模型列表失败');
+        setModelsError(r.error ?? t('llm.models.failed'));
       }
     } catch (err) {
       setModelOptions([]);
@@ -115,21 +120,21 @@ export function LLMSettings() {
     const name = pullModelName.trim();
     if (!name || pulling || !window.metona?.llm?.pullModel) return;
     setPulling(true);
-    setPullStatus({ label: '连接 Ollama 服务…', percent: null });
+    setPullStatus({ label: t('llm.pull.title'), percent: null });
     try {
       const r = await window.metona.llm.pullModel(name);
       if (r.success) {
         import('@metona-team/metona-toast')
-          .then((mod) => mod.default.success(`模型 ${name} 下载完成`))
+          .then((mod) => mod.default.success(t('llm.pull.done', { name })))
           .catch(() => {});
       } else if (!r.aborted) {
         import('@metona-team/metona-toast')
-          .then((mod) => mod.default.error(`模型下载失败：${r.error ?? '未知错误'}`))
+          .then((mod) => mod.default.error(t('llm.pull.failed', { message: r.error ?? 'unknown' })))
           .catch(() => {});
       }
     } catch (err) {
       import('@metona-team/metona-toast')
-        .then((mod) => mod.default.error(`模型下载失败：${(err as Error).message}`))
+        .then((mod) => mod.default.error(t('llm.pull.failed', { message: (err as Error).message })))
         .catch(() => {});
     } finally {
       // onOllamaPullEnded 也会复位（时序竞态下双保险），此处兜底同步复位
@@ -182,7 +187,7 @@ export function LLMSettings() {
         setBalance(r.data);
       } else {
         setBalance(null);
-        setBalanceError(r.error ?? '查询失败');
+        setBalanceError(r.error ?? t('llm.balance.queryFailed'));
       }
     } catch (err) {
       setBalance(null);
@@ -344,7 +349,7 @@ export function LLMSettings() {
   const handleSave = async () => {
     if (hasBlockingError) {
       import('@metona-team/metona-toast')
-        .then((mod) => mod.default.error('请修正表单中的错误后再保存'))
+        .then((mod) => mod.default.error(t('llm.save.blockedToast')))
         .catch(() => {});
       return;
     }
@@ -353,7 +358,7 @@ export function LLMSettings() {
       const setBatch = window.metona?.config?.setBatch;
       if (!setBatch) {
         import('@metona-team/metona-toast')
-          .then((mod) => mod.default.error('配置 API 不可用'))
+          .then((mod) => mod.default.error(t('llm.api.unavailable')))
           .catch(() => {});
         return;
       }
@@ -380,13 +385,13 @@ export function LLMSettings() {
       const r = await setBatch(entries);
       if (r && !r.success) {
         import('@metona-team/metona-toast')
-          .then((mod) => mod.default.error(r.error ?? '配置保存失败'))
+          .then((mod) => mod.default.error(r.error ?? t('llm.save.failed.generic')))
           .catch(() => {});
       } else {
         // v0.5.4: 保存成功后同步多模态开关到 Agent Store（立即生效，控制上传入口）
         useAgentStore.getState().setMultimodalEnabled(multimodalEnabled);
         import('@metona-team/metona-toast')
-          .then((mod) => mod.default.success('配置已保存'))
+          .then((mod) => mod.default.success(t('llm.save.success')))
           .catch(() => {});
         // v0.7.2 P3-9: 保存成功后配置与引擎 adapter 一致 —— 若列表已加载过则静默刷新，
         // 保证候选列表与刚保存的 Provider/BaseURL 同源
@@ -405,10 +410,10 @@ export function LLMSettings() {
     return (
       <Stack spacing={2}>
         <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
-          LLM 配置
+          {t('llm.title')}
         </Typography>
         <Typography variant="caption" sx={{ color: 'text.secondary' }}>
-          加载中...
+          {t('llm.loading')}
         </Typography>
       </Stack>
     );
@@ -419,13 +424,13 @@ export function LLMSettings() {
   return (
     <Stack spacing={2}>
       <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
-        LLM 配置
+        {t('llm.title')}
       </Typography>
       <FormControl size="small">
-        <InputLabel>Provider</InputLabel>
+        <InputLabel>{t('llm.provider.label')}</InputLabel>
         <Select
           value={provider}
-          label="Provider"
+          label={t('llm.provider.label')}
           onChange={(e) => handleProviderChange(e.target.value)}
         >
           <MenuItem value="deepseek">DeepSeek</MenuItem>
@@ -438,12 +443,12 @@ export function LLMSettings() {
       </FormControl>
       <TextField
         size="small"
-        label="API Base URL"
+        label={t('llm.baseURL')}
         value={baseURL}
         onChange={(e) => setBaseURL(e.target.value)}
         placeholder="如 https://api.deepseek.com"
         error={urlError}
-        helperText={urlError ? '需以 http:// 或 https:// 开头' : ' '}
+        helperText={urlError ? t('llm.baseURL.error') : ' '}
       />
       {/* v0.7.2 P3-9: 模型名称 — 自由输入 + 动态模型列表候选（freeSolo） */}
       <Autocomplete
@@ -495,17 +500,17 @@ export function LLMSettings() {
           <TextField
             {...params}
             size="small"
-            label="模型名称"
-            placeholder="如 deepseek-v4-pro、gpt-4o、claude-sonnet-4-5"
+            label={t('llm.model.label')}
+            placeholder={t('llm.model.placeholder')}
             error={modelHasSpace}
             helperText={
               modelHasSpace
-                ? '模型名称不能包含空格'
+                ? t('llm.model.space')
                 : modelsError
                   ? modelsError
                   : modelsLoaded
                     ? ' '
-                    : '可手动输入，或点击下方按钮获取模型列表'
+                    : t('llm.models.hint.unloaded')
             }
           />
         )}
@@ -519,10 +524,10 @@ export function LLMSettings() {
           startIcon={modelsLoading ? <CircularProgress size={12} /> : undefined}
           sx={{ minWidth: 120, fontSize: 11 }}
         >
-          获取模型列表
+          {t('llm.models.load')}
         </Button>
         <Typography variant="caption" sx={{ color: 'text.disabled', fontSize: 10 }}>
-          基于「已保存」的配置查询（修改后请先保存）
+          {t('llm.models.hint')}
         </Typography>
       </Stack>
       {/* v0.5.4: 多模态总开关 — 未开启时即使模型支持也不能上传图片 */}
@@ -536,10 +541,9 @@ export function LLMSettings() {
         }
         label={
           <Stack>
-            <Typography variant="body2">启用多模态（图片输入）</Typography>
+            <Typography variant="body2">{t('llm.multimodal.label')}</Typography>
             <Typography variant="caption" sx={{ color: 'text.disabled' }}>
-              开启后可在输入框上传图片；DeepSeek 需 vision
-              系列模型。历史会话图片会随上下文回传（最近 10 张）
+              {t('llm.multimodal.helper')}
             </Typography>
           </Stack>
         }
@@ -549,7 +553,7 @@ export function LLMSettings() {
         <>
           <TextField
             size="small"
-            label="API Key"
+            label={t('llm.apiKey.label')}
             type={showKey ? 'text' : 'password'}
             value={apiKey}
             onChange={(e) => setApiKey(e.target.value)}
@@ -557,7 +561,7 @@ export function LLMSettings() {
             error={apiKeyEmpty}
             helperText={
               apiKeyEmpty
-                ? `必填，未填 ${PROVIDER_LABELS[provider] ?? provider} 的 API Key 会 401`
+                ? t('llm.apiKey.required', { provider: PROVIDER_LABELS[provider] ?? provider })
                 : ' '
             }
             slotProps={{
@@ -575,17 +579,17 @@ export function LLMSettings() {
       {provider === 'ollama' && (
         <TextField
           size="small"
-          label="上下文长度 (num_ctx)"
+          label={t('llm.numCtx.label')}
           type="number"
           value={numCtx ?? ''}
           onChange={(e) => {
             const v = e.target.value;
             setNumCtx(v === '' ? null : Number(v));
           }}
-          placeholder="默认由模型决定（如 2048、4096、128000）"
+          placeholder={t('llm.numCtx.placeholder')}
           slotProps={{ htmlInput: { min: 512, step: 512 } }}
           error={numCtxError}
-          helperText={numCtxError ? '最小值为 512' : ' '}
+          helperText={numCtxError ? t('llm.numCtx.error') : ' '}
         />
       )}
       {/* ===== v0.7.2 P3-10: Ollama 模型下载（adapter.pullModel 首次接线 UI） ===== */}
@@ -601,7 +605,7 @@ export function LLMSettings() {
           }}
         >
           <Typography variant="caption" sx={{ fontWeight: 600 }}>
-            下载 Ollama 模型
+            {t('llm.pull.title')}
           </Typography>
           <Stack direction="row" spacing={1} sx={{ alignItems: 'center' }}>
             <TextField
@@ -609,7 +613,7 @@ export function LLMSettings() {
               fullWidth
               value={pullModelName}
               onChange={(e) => setPullModelName(e.target.value)}
-              placeholder="模型名，如 qwen3:8b"
+              placeholder={t('llm.pull.placeholder')}
               disabled={pulling}
               slotProps={{ input: { sx: { fontFamily: 'monospace', fontSize: 12 } } }}
             />
@@ -621,7 +625,7 @@ export function LLMSettings() {
                 onClick={handlePullCancel}
                 sx={{ flexShrink: 0 }}
               >
-                取消
+                {t('llm.pull.cancel')}
               </Button>
             ) : (
               <Button
@@ -631,7 +635,7 @@ export function LLMSettings() {
                 disabled={!pullModelName.trim()}
                 sx={{ flexShrink: 0 }}
               >
-                下载
+                {t('llm.pull.download')}
               </Button>
             )}
           </Stack>
@@ -653,7 +657,7 @@ export function LLMSettings() {
             </Stack>
           )}
           <Typography variant="caption" sx={{ color: 'text.disabled', fontSize: 10 }}>
-            从 Ollama 服务拉取模型（大模型下载耗时取决于网络，可随时取消）；完成后获取模型列表即可见
+            {t('llm.pull.helper')}
           </Typography>
         </Stack>
       )}
@@ -661,14 +665,14 @@ export function LLMSettings() {
       {provider === 'deepseek' && (
         <TextField
           size="small"
-          label="上下文窗口 (contextWindow)"
+          label={t('llm.ctxWindow.label')}
           type="number"
           value={dsCtxWindow}
           onChange={(e) => setDsCtxWindow(Number(e.target.value) || 1000000)}
           placeholder="如 64000、128000、1000000"
           slotProps={{ htmlInput: { min: 4096, step: 4096 } }}
           error={dsCtxError}
-          helperText={dsCtxError ? '最小值为 4096' : '用于上下文压缩判断，不传给 API'}
+          helperText={dsCtxError ? t('llm.ctxWindow.minError') : t('llm.ctxWindow.helper')}
         />
       )}
 
@@ -688,17 +692,20 @@ export function LLMSettings() {
           }}
         >
           <Typography variant="caption" sx={{ fontWeight: 600, color: 'text.secondary' }}>
-            账户余额
+            {t('llm.balance.label')}
           </Typography>
           {balanceLoading ? (
             <Typography variant="caption" sx={{ color: 'text.secondary' }}>
-              查询中...
+              {t('llm.balance.querying')}
             </Typography>
           ) : balance ? (
             <Typography variant="caption" sx={{ fontFamily: 'monospace', fontWeight: 600 }}>
               {balance.totalBalance} {balance.currency}
               <Typography component="span" variant="caption" sx={{ color: 'text.disabled', ml: 1 }}>
-                （赠送 {balance.grantedBalance} + 充值 {balance.toppedUpBalance}）
+                {t('llm.balance.granted', {
+                  granted: balance.grantedBalance,
+                  topped: balance.toppedUpBalance,
+                })}
               </Typography>
             </Typography>
           ) : (
@@ -706,7 +713,7 @@ export function LLMSettings() {
               variant="caption"
               sx={{ color: balanceError ? 'error.main' : 'text.disabled' }}
             >
-              {balanceError ?? '未查询（需已保存 API Key）'}
+              {balanceError ?? t('llm.balance.unqueried')}
             </Typography>
           )}
           <Button
@@ -716,76 +723,78 @@ export function LLMSettings() {
             disabled={balanceLoading || !apiKey.trim()}
             sx={{ ml: 'auto', minWidth: 64, fontSize: 11 }}
           >
-            刷新
+            {t('common.refresh')}
           </Button>
         </Stack>
       )}
       {provider === 'agnes' && (
         <TextField
           size="small"
-          label="上下文窗口 (contextWindow)"
+          label={t('llm.ctxWindow.label')}
           type="number"
           value={agnesCtxWindow}
           onChange={(e) => setAgnesCtxWindow(Number(e.target.value) || 1000000)}
           placeholder="如 64000、128000、1000000"
           slotProps={{ htmlInput: { min: 4096, step: 4096 } }}
           error={agnesCtxError}
-          helperText={agnesCtxError ? '最小值为 4096' : '用于上下文压缩判断，不传给 API'}
+          helperText={agnesCtxError ? t('llm.ctxWindow.minError') : t('llm.ctxWindow.helper')}
         />
       )}
       {provider === 'mimo' && (
         <TextField
           size="small"
-          label="上下文窗口 (contextWindow)"
+          label={t('llm.ctxWindow.label')}
           type="number"
           value={mimoCtxWindow}
           onChange={(e) => setMimoCtxWindow(Number(e.target.value) || 1000000)}
           placeholder="如 65536、131072、1000000"
           slotProps={{ htmlInput: { min: 4096, step: 4096 } }}
           error={mimoCtxError}
-          helperText={mimoCtxError ? '最小值为 4096' : '默认 1000000（1M），用于上下文压缩判断'}
+          helperText={mimoCtxError ? t('llm.ctxWindow.minError') : t('llm.ctxWindow.mimoHelper')}
         />
       )}
       {provider === 'openai' && (
         <TextField
           size="small"
-          label="上下文窗口 (contextWindow)"
+          label={t('llm.ctxWindow.label')}
           type="number"
           value={oaCtxWindow}
           onChange={(e) => setOaCtxWindow(Number(e.target.value) || 128000)}
           placeholder="如 128000、200000、1000000"
           slotProps={{ htmlInput: { min: 4096, step: 4096 } }}
           error={oaCtxError}
-          helperText={oaCtxError ? '最小值为 4096' : 'gpt-4o 默认 128K，gpt-4.1 默认 1M'}
+          helperText={oaCtxError ? t('llm.ctxWindow.minError') : t('llm.ctxWindow.oaHelper')}
         />
       )}
       {provider === 'anthropic' && (
         <TextField
           size="small"
-          label="上下文窗口 (contextWindow)"
+          label={t('llm.ctxWindow.label')}
           type="number"
           value={anthropicCtxWindow}
           onChange={(e) => setAnthropicCtxWindow(Number(e.target.value) || 200000)}
           placeholder="如 200000"
           slotProps={{ htmlInput: { min: 4096, step: 4096 } }}
           error={anthropicCtxError}
-          helperText={anthropicCtxError ? '最小值为 4096' : 'Claude 默认 200K'}
+          helperText={
+            anthropicCtxError ? t('llm.ctxWindow.minError') : t('llm.ctxWindow.anthropicHelper')
+          }
         />
       )}
 
       {/* ===== P1: 故障转移 Provider（主 Provider 请求失败时自动切换） ===== */}
       <Divider />
       <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
-        故障转移（可选）
+        {t('llm.fallback.title')}
       </Typography>
       <Typography variant="caption" sx={{ color: 'text.secondary' }}>
-        主 Provider 请求失败（重试耗尽或密钥失效）时自动切换到备用 Provider 重发。留空禁用。
+        {t('llm.fallback.helper')}
       </Typography>
       <FormControl size="small">
-        <InputLabel>备用 Provider</InputLabel>
+        <InputLabel>{t('llm.fallback.provider')}</InputLabel>
         <Select
           value={fbProvider}
-          label="备用 Provider"
+          label={t('llm.fallback.provider')}
           onChange={(e) => {
             const v = e.target.value;
             setFbProvider(v);
@@ -795,7 +804,7 @@ export function LLMSettings() {
           }}
         >
           <MenuItem value="">
-            <em>禁用</em>
+            <em>{t('llm.fallback.disabled')}</em>
           </MenuItem>
           <MenuItem value="deepseek">DeepSeek</MenuItem>
           <MenuItem value="agnes">Agnes AI</MenuItem>
@@ -809,14 +818,14 @@ export function LLMSettings() {
         <>
           <TextField
             size="small"
-            label="备用 Base URL"
+            label={t('llm.fallback.baseURL')}
             value={fbBaseURL}
             onChange={(e) => setFbBaseURL(e.target.value)}
             placeholder="如 https://api.deepseek.com"
           />
           <TextField
             size="small"
-            label="备用模型名称"
+            label={t('llm.fallback.model')}
             value={fbModel}
             onChange={(e) => setFbModel(e.target.value)}
             placeholder="如 deepseek-v4-flash"
@@ -824,7 +833,7 @@ export function LLMSettings() {
           {fbProvider !== 'ollama' && (
             <TextField
               size="small"
-              label="备用 API Key"
+              label={t('llm.fallback.apiKey')}
               type={showFbKey ? 'text' : 'password'}
               value={fbApiKey}
               onChange={(e) => setFbApiKey(e.target.value)}
@@ -852,11 +861,11 @@ export function LLMSettings() {
           disabled={saving || hasBlockingError}
           startIcon={saving ? <CircularProgress size={12} /> : undefined}
         >
-          {saving ? '保存中...' : '保存配置'}
+          {saving ? t('llm.saving') : t('llm.save')}
         </Button>
         {hasBlockingError && (
           <Typography variant="caption" sx={{ color: 'error.main', fontSize: 11 }}>
-            请修正表单错误后再保存
+            {t('llm.save.blocked')}
           </Typography>
         )}
       </Stack>
diff --git a/src/components/settings/LogsSettings.tsx b/src/components/settings/LogsSettings.tsx
index bd4f4de..f4f3c6b 100644
--- a/src/components/settings/LogsSettings.tsx
+++ b/src/components/settings/LogsSettings.tsx
@@ -22,11 +22,12 @@ import {
   InputLabel,
   FormControl,
 } from '@mui/material';
-import { Folder, Copy } from 'lucide-react';
+import { Folder, Copy, RefreshCw } from 'lucide-react';
 import { useConfig } from './useConfig';
 import { useUIStore } from '@renderer/stores/ui-store';
 import { useAgentStore } from '@renderer/stores/agent-store';
 import { useSessionStore } from '@renderer/stores/session-store';
+import { formatFileSize } from '@renderer/lib/formatters';
 
 export function LogsSettings() {
   const [logLevel, setLogLevel] = useConfig('logging.level', 'info');
@@ -315,6 +316,12 @@ export function LogsSettings() {
         {clearing === 'auditLogs' ? '清理中...' : '🗑️ 清理审计日志'}
       </Button>
 
+      {/* v0.7.3 P3-3: JSONL 录制文件生命周期（统计 + 手动清理） */}
+      <TraceFilesPanel />
+
+      {/* v0.7.3 P3-4: SLO / 健康快照可视化（只读 + 手动刷新） */}
+      <HealthSnapshotPanel />
+
       {/* L-11 修复（审计补充）: 清理数据确认 Dialog（替代原生 confirm()） */}
       <Dialog
         open={confirmClear !== null}
@@ -340,3 +347,251 @@ export function LogsSettings() {
     </Stack>
   );
 }
+
+// ===== v0.7.3 P3-3: JSONL 录制文件统计与清理 =====
+
+function TraceFilesPanel(): React.JSX.Element {
+  const [stats, setStats] = useState<{ count: number; totalBytes: number } | null>(null);
+  const [pruning, setPruning] = useState(false);
+
+  const loadStats = async () => {
+    try {
+      const r = await window.metona?.logs?.traceStats();
+      if (r?.success && r.data) setStats(r.data);
+    } catch (err) {
+      console.error('[LogsSettings] traceStats failed:', err);
+    }
+  };
+
+  useEffect(() => {
+    void loadStats();
+  }, []);
+
+  const handlePrune = async () => {
+    setPruning(true);
+    try {
+      const r = await window.metona?.logs?.pruneTraceFiles();
+      if (r?.success) {
+        import('@metona-team/metona-toast')
+          .then((mod) =>
+            mod.default.success(`已清理 ${r.data?.deleted ?? 0} 个旧录制文件（保留最近 200 个）`),
+          )
+          .catch(() => {});
+        void loadStats();
+      } else {
+        import('@metona-team/metona-toast')
+          .then((mod) => mod.default.error(r?.error ?? '清理失败'))
+          .catch(() => {});
+      }
+    } catch (err) {
+      import('@metona-team/metona-toast')
+        .then((mod) => mod.default.error(`清理失败：${(err as Error).message}`))
+        .catch(() => {});
+    } finally {
+      setPruning(false);
+    }
+  };
+
+  return (
+    <>
+      <Divider />
+      <Typography variant="caption" sx={{ fontWeight: 600, color: 'text.secondary' }}>
+        会话录制文件（TRACE JSONL）
+      </Typography>
+      <Box>
+        <Typography variant="caption" sx={{ color: 'text.secondary', fontSize: 11 }}>
+          {stats
+            ? `${stats.count} 个文件 · 共 ${formatFileSize(stats.totalBytes)}（保留策略：最近 200 个，启动时自动清理）`
+            : '统计中...'}
+        </Typography>
+        <Stack direction="row" spacing={1} sx={{ mt: 1 }}>
+          <Button
+            variant="outlined"
+            size="small"
+            startIcon={<RefreshCw size={14} />}
+            onClick={() => void loadStats()}
+          >
+            刷新统计
+          </Button>
+          <Button
+            variant="outlined"
+            size="small"
+            color="error"
+            onClick={handlePrune}
+            disabled={pruning || !stats || stats.count === 0}
+          >
+            {pruning ? '清理中...' : '清理旧录制文件'}
+          </Button>
+        </Stack>
+      </Box>
+    </>
+  );
+}
+
+// ===== v0.7.3 P3-4: SLO / 健康快照可视化 =====
+
+function HealthSnapshotPanel(): React.JSX.Element {
+  const [snapshot, setSnapshot] = useState<MetonaHealthSnapshot | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [chainResult, setChainResult] = useState<{
+    valid: boolean;
+    verified: number;
+    total: number;
+  } | null>(null);
+
+  const loadSnapshot = async () => {
+    setLoading(true);
+    try {
+      const r = await window.metona?.app?.getHealthSnapshot();
+      if (r?.success && r.data) setSnapshot(r.data);
+    } catch (err) {
+      console.error('[LogsSettings] healthSnapshot failed:', err);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  useEffect(() => {
+    void loadSnapshot();
+  }, []);
+
+  const handleVerifyChain = async () => {
+    try {
+      const r = await window.metona?.audit?.verifyChain();
+      if (r?.success) {
+        setChainResult({
+          valid: r.valid,
+          verified: r.verifiedRecords,
+          total: r.totalRecords,
+        });
+      } else {
+        import('@metona-team/metona-toast')
+          .then((mod) => mod.default.error(r?.error ?? '校验失败'))
+          .catch(() => {});
+      }
+    } catch (err) {
+      import('@metona-team/metona-toast')
+        .then((mod) => mod.default.error(`校验失败：${(err as Error).message}`))
+        .catch(() => {});
+    }
+  };
+
+  const fmtPct = (v: number): string => `${(v * 100).toFixed(2)}%`;
+
+  return (
+    <>
+      <Divider />
+      <Stack direction="row" sx={{ alignItems: 'center' }}>
+        <Typography variant="caption" sx={{ fontWeight: 600, color: 'text.secondary' }}>
+          运行健康（SLO / 健康检查）
+        </Typography>
+        <Button
+          size="small"
+          sx={{ ml: 'auto', fontSize: 10, minWidth: 60 }}
+          startIcon={<RefreshCw size={12} />}
+          onClick={() => void loadSnapshot()}
+          disabled={loading}
+        >
+          刷新
+        </Button>
+      </Stack>
+      {!snapshot ? (
+        <Typography variant="caption" sx={{ color: 'text.disabled', fontSize: 11 }}>
+          {loading ? '加载中...' : '暂无快照'}
+        </Typography>
+      ) : (
+        <Box
+          sx={{
+            p: 1.5,
+            borderRadius: 1.5,
+            bgcolor: 'secondary.main',
+            border: '1px solid',
+            borderColor: 'divider',
+          }}
+        >
+          <Stack spacing={0.5}>
+            <HealthRow
+              label="请求错误率（5 分钟窗口）"
+              value={`${fmtPct(snapshot.slo.errorRate)}（${snapshot.slo.totalRequests} 次请求）`}
+              warn={snapshot.slo.violated}
+            />
+            <HealthRow
+              label="延迟 P50 / P95 / P99"
+              value={`${Math.round(snapshot.slo.percentiles['P50'] ?? 0)} / ${Math.round(
+                snapshot.slo.percentiles['P95'] ?? 0,
+              )} / ${Math.round(snapshot.slo.percentiles['P99'] ?? 0)} ms`}
+            />
+            <HealthRow
+              label="SLO 燃烧速率（目标 99.9%）"
+              value={snapshot.slo.burnRate.toFixed(2)}
+              warn={snapshot.slo.violated}
+            />
+            <HealthRow
+              label="健康检查"
+              value={
+                snapshot.health
+                  ? snapshot.health.healthy
+                    ? '全部通过'
+                    : `异常：${snapshot.health.checks
+                        .filter((c) => !c.healthy)
+                        .map((c) => c.name)
+                        .join(', ')}`
+                  : '启动后尚未执行（周期 60s）'
+              }
+              warn={snapshot.health ? !snapshot.health.healthy : false}
+            />
+            {chainResult && (
+              <HealthRow
+                label="审计日志链校验"
+                value={
+                  chainResult.valid
+                    ? `通过（${chainResult.verified}/${chainResult.total} 条）`
+                    : `已篡改！首个异常记录 #${chainResult.total}`
+                }
+                warn={!chainResult.valid}
+              />
+            )}
+          </Stack>
+          <Button
+            size="small"
+            variant="outlined"
+            sx={{ mt: 1, fontSize: 10, minWidth: 100 }}
+            onClick={handleVerifyChain}
+          >
+            校验审计日志链
+          </Button>
+        </Box>
+      )}
+    </>
+  );
+}
+
+function HealthRow({
+  label,
+  value,
+  warn,
+}: {
+  label: string;
+  value: string;
+  warn?: boolean;
+}): React.JSX.Element {
+  return (
+    <Stack direction="row" sx={{ alignItems: 'center' }}>
+      <Typography variant="caption" sx={{ color: 'text.secondary', fontSize: 11 }}>
+        {label}
+      </Typography>
+      <Typography
+        variant="caption"
+        sx={{
+          ml: 'auto',
+          fontSize: 11,
+          fontFamily: 'monospace',
+          fontWeight: 600,
+          color: warn ? 'error.main' : 'text.primary',
+        }}
+      >
+        {value}
+      </Typography>
+    </Stack>
+  );
+}
diff --git a/src/components/settings/MCPSettings.tsx b/src/components/settings/MCPSettings.tsx
index 7d233e0..f3d4cf4 100644
--- a/src/components/settings/MCPSettings.tsx
+++ b/src/components/settings/MCPSettings.tsx
@@ -131,9 +131,16 @@ export function MCPSettings() {
   const statusColors: Record<string, string> = {
     connected: 'success.main',
     connecting: 'warning.main',
+    // v0.7.3 P4-2: reconnecting —— 自动重连排程中（信息态，非故障）
+    reconnecting: 'info.main',
     disconnected: 'text.secondary',
     error: 'error.main',
   };
+  /** v0.7.3 P4-2: reconnecting 状态显示第 N/3 次尝试 */
+  const statusLabel = (s: { status: string; reconnectAttempt?: number }): string =>
+    s.status === 'reconnecting' && s.reconnectAttempt
+      ? `${s.status} (${s.reconnectAttempt}/3)`
+      : s.status;
 
   // L-11 修复: 确认移除 MCP 服务
   // 审计补充修复: 添加 try/catch，避免 removeServer reject 时 Dialog 卡死无法关闭
@@ -185,7 +192,7 @@ export function MCPSettings() {
                 {s.name}
               </Typography>
               <Typography variant="caption" sx={{ color: statusColors[s.status] }}>
-                {s.status}
+                {statusLabel(s)}
               </Typography>
               {s.toolCount > 0 && (
                 <Typography variant="caption" sx={{ color: 'text.secondary' }}>
diff --git a/src/lib/i18n-strings.ts b/src/lib/i18n-strings.ts
index a9909d6..73af09b 100644
--- a/src/lib/i18n-strings.ts
+++ b/src/lib/i18n-strings.ts
@@ -103,6 +103,144 @@ registerTranslations('zh-CN', {
   'monitor.sub.running': '运行中',
   'monitor.sub.completed': '已完成',
   'monitor.sub.error': '失败',
+
+  // ===== 输入框（ChatInput）—— v0.7.3 P4-3 =====
+  'input.placeholder.ready': '输入消息... (Cmd/Ctrl+Enter 发送, Cmd/Ctrl+Shift+Enter 换行, / 命令)',
+  'input.placeholder.toolsLoading': '工具加载中...',
+  'input.placeholder.configLoading': '正在加载配置...',
+  'input.send': '发送',
+  'input.abort': '中断',
+  'input.attach.image': '附加文件（图片/文本/代码）',
+  'input.attach.textOnly.model': '附加文件（文本/代码）— 当前模型不支持图片',
+  'input.attach.textOnly.toggle': '附加文件（文本/代码）— 多模态未开启（设置 → LLM 配置）',
+  'input.image.skipped.model':
+    '当前模型不支持图片（{{provider}} 需多模态模型），已跳过 {{count}} 个图片文件',
+  'input.image.skipped.toggle': '多模态未开启（设置 → LLM 配置），已跳过 {{count}} 个图片文件',
+  'input.image.skipped.probe': '当前模型不支持图片（能力探测），已跳过 {{count}} 个图片文件',
+  'input.file.readFailed': '文件读取失败，请检查文件是否损坏或被锁定',
+  'input.file.partialFailed': '{{count}} 个文件读取失败，已跳过',
+  'input.text.truncated': '文本附件 "{{name}}" 超过 512KB，已截断为前 512KB',
+  'input.text.truncatedNote':
+    '\n\n[... 文件内容已截断：原始大小 {{size}}，仅包含前 {{limit}}。如需完整内容请分段处理 ...]',
+  'input.toast.toolsLoading': '工具正在加载中，请稍候...',
+  'input.slash.tool': '选择工具',
+  'input.slash.memory': '搜索记忆',
+  'input.slash.clear': '清空会话',
+  'input.slash.export': '导出 Markdown',
+
+  // ===== LLM 配置（LLMSettings）—— v0.7.3 P4-3 =====
+  'llm.title': 'LLM 配置',
+  'llm.loading': '加载中...',
+  'llm.provider.label': 'Provider',
+  'llm.baseURL': 'API Base URL',
+  'llm.baseURL.error': '需以 http:// 或 https:// 开头',
+  'llm.model.label': '模型名称',
+  'llm.model.placeholder': '如 deepseek-v4-pro、gpt-4o、claude-sonnet-4-5',
+  'llm.model.space': '模型名称不能包含空格',
+  'llm.models.load': '获取模型列表',
+  'llm.models.hint': '基于「已保存」的配置查询（修改后请先保存）',
+  'llm.models.hint.unloaded': '可手动输入，或点击下方按钮获取模型列表',
+  'llm.models.failed': '获取模型列表失败',
+  'llm.multimodal.label': '启用多模态（图片输入）',
+  'llm.multimodal.helper':
+    '开启后可在输入框上传图片；DeepSeek 需 vision 系列模型。历史会话图片会随上下文回传（最近 10 张）',
+  'llm.apiKey.label': 'API Key',
+  'llm.apiKey.required': '必填，未填 {{provider}} 的 API Key 会 401',
+  'llm.numCtx.label': '上下文长度 (num_ctx)',
+  'llm.numCtx.placeholder': '默认由模型决定（如 2048、4096、128000）',
+  'llm.numCtx.error': '最小值为 512',
+  'llm.ctxWindow.label': '上下文窗口 (contextWindow)',
+  'llm.ctxWindow.placeholder': '如 64000、128000、1000000',
+  'llm.ctxWindow.minError': '最小值为 4096',
+  'llm.ctxWindow.helper': '用于上下文压缩判断，不传给 API',
+  'llm.ctxWindow.mimoHelper': '默认 1000000（1M），用于上下文压缩判断',
+  'llm.ctxWindow.oaHelper': 'gpt-4o 默认 128K，gpt-4.1 默认 1M',
+  'llm.ctxWindow.anthropicHelper': 'Claude 默认 200K',
+  'llm.pull.title': '下载 Ollama 模型',
+  'llm.pull.placeholder': '模型名，如 qwen3:8b',
+  'llm.pull.download': '下载',
+  'llm.pull.cancel': '取消',
+  'llm.pull.helper':
+    '从 Ollama 服务拉取模型（大模型下载耗时取决于网络，可随时取消）；完成后获取模型列表即可见',
+  'llm.pull.done': '模型 {{name}} 下载完成',
+  'llm.pull.failed': '模型下载失败：{{message}}',
+  'llm.balance.label': '账户余额',
+  'llm.balance.querying': '查询中...',
+  'llm.balance.unqueried': '未查询（需已保存 API Key）',
+  'llm.balance.granted': '（赠送 {{granted}} + 充值 {{topped}}）',
+  'llm.balance.queryFailed': '查询失败',
+  'llm.fallback.title': '故障转移（可选）',
+  'llm.fallback.helper':
+    '主 Provider 请求失败（重试耗尽或密钥失效）时自动切换到备用 Provider 重发。留空禁用。',
+  'llm.fallback.provider': '备用 Provider',
+  'llm.fallback.disabled': '禁用',
+  'llm.fallback.baseURL': '备用 Base URL',
+  'llm.fallback.model': '备用模型名称',
+  'llm.fallback.apiKey': '备用 API Key',
+  'llm.save': '保存配置',
+  'llm.saving': '保存中...',
+  'llm.save.blocked': '请修正表单错误后再保存',
+  'llm.save.blockedToast': '请修正表单中的错误后再保存',
+  'llm.save.success': '配置已保存',
+  'llm.save.failed': '保存失败：{{message}}',
+  'llm.api.unavailable': '配置 API 不可用',
+  'llm.save.failed.generic': '配置保存失败',
+
+  // ===== 记忆库（MemoryViewer）—— v0.7.3 P4-3 =====
+  'memory.search.title': '记忆搜索',
+  'memory.list.title': '记忆库',
+  'memory.results': '{{count}} 条结果',
+  'memory.total': '{{count}} 条',
+  'memory.search.placeholder': '搜索记忆...',
+  'memory.search.clear': '清除',
+  'memory.searching': '搜索中...',
+  'memory.search.empty': '无匹配结果',
+  'memory.empty': '暂无记忆数据',
+  'memory.loadFailed': '加载记忆失败',
+  'memory.deleteFailed': '删除失败',
+  'memory.type.episodic': '情景记忆',
+  'memory.type.semantic': '语义记忆',
+  'memory.type.working': '工作记忆',
+
+  // ===== 引导向导（OnboardingWizard）—— v0.7.3 P4-3 =====
+  'onboarding.step.welcome': '欢迎',
+  'onboarding.step.llm': '配置 LLM',
+  'onboarding.step.agent': '自定义 Agent',
+  'onboarding.step.workspace': '工作空间',
+  'onboarding.step.done': '开始使用',
+  'onboarding.prev': '上一步',
+  'onboarding.next': '下一步',
+  'onboarding.finish': '开始使用',
+  'onboarding.welcome.title': '欢迎使用 MetonaAI Desktop',
+  'onboarding.welcome.body':
+    '生产级通用 AI Agent 智能体桌面应用，支持多轮对话、工具调用、记忆系统和 MCP 协议集成。',
+  'onboarding.welcome.hint': '让我们花 1 分钟完成初始配置。',
+  'onboarding.llm.title': '配置 LLM Provider',
+  'onboarding.llm.body': '选择 Provider 并填写 API 信息。Base URL 和模型名称支持任意输入。',
+  'onboarding.llm.multimodal.label': '启用多模态（图片输入）',
+  'onboarding.llm.multimodal.helper': '开启后可在输入框上传图片；DeepSeek 需 vision 系列模型',
+  'onboarding.llm.apiKey.placeholder': 'sk-...（本地模型可留空）',
+  'onboarding.llm.ctx.ollama': '上下文长度 (num_ctx)',
+  'onboarding.llm.ctx.window': '上下文窗口 (contextWindow)',
+  'onboarding.llm.ctx.ollamaPlaceholder': '默认由模型决定（如 2048、4096、128000）',
+  'onboarding.llm.ctx.placeholder': '如 64000、128000、1000000',
+  'onboarding.llm.ctx.helper': '用于上下文压缩判断，不传给 API',
+  'onboarding.llm.ctx.minError': '最小值为 {{min}}',
+  'onboarding.agent.title': '自定义 Agent',
+  'onboarding.agent.body': '编辑工作空间中的 SOUL.md 文件来定义 Agent 的身份和性格。',
+  'onboarding.agent.soulLabel': 'SOUL.md — 定义 Agent 的身份、性格、核心价值观',
+  'onboarding.agent.soulHint': '此步骤可稍后在工作空间目录中完成。',
+  'onboarding.workspace.title': '工作空间',
+  'onboarding.workspace.body': '选择工作空间目录，或使用默认路径。',
+  'onboarding.workspace.pick': '选择文件夹',
+  'onboarding.workspace.placeholder': '~/MetonaWorkspaces/default/',
+  'onboarding.workspace.helper': '包含 SOUL.md、MEMORY.md 两个必需文件，首次打开时自动创建。',
+  'onboarding.done.title': '配置完成！',
+  'onboarding.done.body': 'MetonaAI Desktop 已准备就绪。开始与你的 AI Agent 对话吧！',
+  'onboarding.done.hint': '按 Ctrl+Enter 发送消息，输入 / 查看命令列表',
+  'onboarding.toast.saveFailed': '配置保存失败，请重试',
+  'onboarding.toast.saveFailedWithReason': '保存配置失败：{{message}}',
+  'onboarding.toast.folderFailed': '选择文件夹失败',
 });
 
 registerTranslations('en-US', {
@@ -195,4 +333,149 @@ registerTranslations('en-US', {
   'monitor.sub.running': 'Running',
   'monitor.sub.completed': 'Completed',
   'monitor.sub.error': 'Failed',
+
+  // ===== 输入框（ChatInput）=====
+  'input.placeholder.ready':
+    'Type a message... (Cmd/Ctrl+Enter to send, Cmd/Ctrl+Shift+Enter for newline, / for commands)',
+  'input.placeholder.toolsLoading': 'Loading tools...',
+  'input.placeholder.configLoading': 'Loading configuration...',
+  'input.send': 'Send',
+  'input.abort': 'Stop',
+  'input.attach.image': 'Attach files (images/text/code)',
+  'input.attach.textOnly.model': 'Attach files (text/code) — current model has no image support',
+  'input.attach.textOnly.toggle': 'Attach files (text/code) — multimodal disabled (Settings → LLM)',
+  'input.image.skipped.model':
+    'Current model has no image support ({{provider}} requires a multimodal model); {{count}} image file(s) skipped',
+  'input.image.skipped.toggle':
+    'Multimodal is disabled (Settings → LLM); {{count}} image file(s) skipped',
+  'input.image.skipped.probe':
+    'Current model has no image support (capability probe); {{count}} image file(s) skipped',
+  'input.file.readFailed': 'Failed to read files — check whether they are corrupted or locked',
+  'input.file.partialFailed': '{{count}} file(s) failed to read and were skipped',
+  'input.text.truncated':
+    'Text attachment "{{name}}" exceeds 512KB and was truncated to the first 512KB',
+  'input.text.truncatedNote':
+    '\n\n[... File content truncated: original size {{size}}, only the first {{limit}} included. Process in segments if you need the full content ...]',
+  'input.toast.toolsLoading': 'Tools are still loading, please wait...',
+  'input.slash.tool': 'Pick a tool',
+  'input.slash.memory': 'Search memory',
+  'input.slash.clear': 'Clear session',
+  'input.slash.export': 'Export Markdown',
+
+  // ===== LLM 配置（LLMSettings）=====
+  'llm.title': 'LLM Configuration',
+  'llm.loading': 'Loading...',
+  'llm.provider.label': 'Provider',
+  'llm.baseURL': 'API Base URL',
+  'llm.baseURL.error': 'Must start with http:// or https://',
+  'llm.model.label': 'Model Name',
+  'llm.model.placeholder': 'e.g. deepseek-v4-pro, gpt-4o, claude-sonnet-4-5',
+  'llm.model.space': 'Model name must not contain spaces',
+  'llm.models.load': 'Fetch model list',
+  'llm.models.hint': 'Queries the saved configuration (save changes first)',
+  'llm.models.hint.unloaded': 'Type manually, or fetch the model list below',
+  'llm.models.failed': 'Failed to fetch model list',
+  'llm.multimodal.label': 'Enable multimodal (image input)',
+  'llm.multimodal.helper':
+    'Allows uploading images; DeepSeek requires a vision model. Images from history are replayed (last 10)',
+  'llm.apiKey.label': 'API Key',
+  'llm.apiKey.required': 'Required — missing {{provider}} API Key will result in 401',
+  'llm.numCtx.label': 'Context length (num_ctx)',
+  'llm.numCtx.placeholder': 'Default decided by the model (e.g. 2048, 4096, 128000)',
+  'llm.numCtx.error': 'Minimum is 512',
+  'llm.ctxWindow.label': 'Context window (contextWindow)',
+  'llm.ctxWindow.placeholder': 'e.g. 64000, 128000, 1000000',
+  'llm.ctxWindow.minError': 'Minimum is 4096',
+  'llm.ctxWindow.helper': 'Used for context-compression decisions; not sent to the API',
+  'llm.ctxWindow.mimoHelper': 'Default 1000000 (1M), used for compression decisions',
+  'llm.ctxWindow.oaHelper': 'gpt-4o defaults to 128K, gpt-4.1 to 1M',
+  'llm.ctxWindow.anthropicHelper': 'Claude defaults to 200K',
+  'llm.pull.title': 'Download Ollama model',
+  'llm.pull.placeholder': 'Model name, e.g. qwen3:8b',
+  'llm.pull.download': 'Download',
+  'llm.pull.cancel': 'Cancel',
+  'llm.pull.helper':
+    'Pull a model from the Ollama server (large downloads depend on network; cancellable). Fetch the list afterwards',
+  'llm.pull.done': 'Model {{name}} downloaded',
+  'llm.pull.failed': 'Model download failed: {{message}}',
+  'llm.balance.label': 'Account Balance',
+  'llm.balance.querying': 'Querying...',
+  'llm.balance.unqueried': 'Not queried (requires a saved API Key)',
+  'llm.balance.granted': '(granted {{granted}} + topped up {{topped}})',
+  'llm.balance.queryFailed': 'Query failed',
+  'llm.fallback.title': 'Failover (optional)',
+  'llm.fallback.helper':
+    'Switch to the fallback provider when the primary fails (retries exhausted or invalid key). Leave empty to disable.',
+  'llm.fallback.provider': 'Fallback Provider',
+  'llm.fallback.disabled': 'Disabled',
+  'llm.fallback.baseURL': 'Fallback Base URL',
+  'llm.fallback.model': 'Fallback Model Name',
+  'llm.fallback.apiKey': 'Fallback API Key',
+  'llm.save': 'Save Configuration',
+  'llm.saving': 'Saving...',
+  'llm.save.blocked': 'Fix form errors before saving',
+  'llm.save.blockedToast': 'Please fix the form errors before saving',
+  'llm.save.success': 'Configuration saved',
+  'llm.save.failed': 'Save failed: {{message}}',
+  'llm.api.unavailable': 'Configuration API unavailable',
+  'llm.save.failed.generic': 'Failed to save configuration',
+
+  // ===== 记忆库（MemoryViewer）=====
+  'memory.search.title': 'Memory Search',
+  'memory.list.title': 'Memory Store',
+  'memory.results': '{{count}} results',
+  'memory.total': '{{count}} items',
+  'memory.search.placeholder': 'Search memories...',
+  'memory.search.clear': 'Clear',
+  'memory.searching': 'Searching...',
+  'memory.search.empty': 'No matches',
+  'memory.empty': 'No memories yet',
+  'memory.loadFailed': 'Failed to load memories',
+  'memory.deleteFailed': 'Delete failed',
+  'memory.type.episodic': 'Episodic',
+  'memory.type.semantic': 'Semantic',
+  'memory.type.working': 'Working',
+
+  // ===== 引导向导（OnboardingWizard）=====
+  'onboarding.step.welcome': 'Welcome',
+  'onboarding.step.llm': 'Configure LLM',
+  'onboarding.step.agent': 'Customize Agent',
+  'onboarding.step.workspace': 'Workspace',
+  'onboarding.step.done': 'Get Started',
+  'onboarding.prev': 'Back',
+  'onboarding.next': 'Next',
+  'onboarding.finish': 'Get Started',
+  'onboarding.welcome.title': 'Welcome to MetonaAI Desktop',
+  'onboarding.welcome.body':
+    'A production-grade AI Agent desktop app with multi-turn chat, tool calling, memory, and MCP integration.',
+  'onboarding.welcome.hint': "Let's spend 1 minute on initial setup.",
+  'onboarding.llm.title': 'Configure LLM Provider',
+  'onboarding.llm.body':
+    'Pick a provider and fill in API details. Base URL and model accept any input.',
+  'onboarding.llm.multimodal.label': 'Enable multimodal (image input)',
+  'onboarding.llm.multimodal.helper': 'Allows uploading images; DeepSeek requires a vision model',
+  'onboarding.llm.apiKey.placeholder': 'sk-... (leave empty for local models)',
+  'onboarding.llm.ctx.ollama': 'Context length (num_ctx)',
+  'onboarding.llm.ctx.window': 'Context window (contextWindow)',
+  'onboarding.llm.ctx.ollamaPlaceholder': 'Default decided by the model (e.g. 2048, 4096, 128000)',
+  'onboarding.llm.ctx.placeholder': 'e.g. 64000, 128000, 1000000',
+  'onboarding.llm.ctx.helper': 'Used for context-compression decisions; not sent to the API',
+  'onboarding.llm.ctx.minError': 'Minimum is {{min}}',
+  'onboarding.agent.title': 'Customize Agent',
+  'onboarding.agent.body':
+    'Edit SOUL.md in the workspace to define the agent identity and personality.',
+  'onboarding.agent.soulLabel': 'SOUL.md — define the agent identity, personality, and core values',
+  'onboarding.agent.soulHint': 'You can do this later in the workspace directory.',
+  'onboarding.workspace.title': 'Workspace',
+  'onboarding.workspace.body': 'Choose a workspace directory, or keep the default.',
+  'onboarding.workspace.pick': 'Choose Folder',
+  'onboarding.workspace.placeholder': '~/MetonaWorkspaces/default/',
+  'onboarding.workspace.helper':
+    'Contains the two required files SOUL.md and MEMORY.md, auto-created on first open.',
+  'onboarding.done.title': 'All set!',
+  'onboarding.done.body': 'MetonaAI Desktop is ready. Start chatting with your AI agent!',
+  'onboarding.done.hint': 'Press Ctrl+Enter to send; type / to see commands',
+  'onboarding.toast.saveFailed': 'Failed to save configuration, please retry',
+  'onboarding.toast.saveFailedWithReason': 'Failed to save configuration: {{message}}',
+  'onboarding.toast.folderFailed': 'Failed to choose folder',
 });
diff --git a/src/lib/model-capabilities.ts b/src/lib/model-capabilities.ts
new file mode 100644
index 0000000..e835d38
--- /dev/null
+++ b/src/lib/model-capabilities.ts
@@ -0,0 +1,62 @@
+/**
+ * 模型能力门控纯函数（v0.7.3 P1-4）
+ *
+ * ChatInput 的图片上传入口此前只有"多模态总开关 × DeepSeek vision 命名"两道
+ * 判定 —— Ollama 恒放行，但本地语言模型是否支持 vision 因模型而异（qwen3 纯文本
+ * vs llava 视觉）。v0.6.4 P4-1 已实现 /api/show 能力探测，本模块把"是否允许上传
+ * 图片"的完整判定收敛为纯函数，供组件消费与表测锁定。
+ *
+ * 判定链（任一不满足即拒绝）：
+ * 1. multimodalEnabled 总开关（设置 → LLM 配置）；
+ * 2. Provider 级：DeepSeek 非 vision 系列命名 → 拒绝（模型级防线，与 adapter 口径一致）；
+ * 3. 模型级：Ollama 消费 llm:listModels 的 supportsVision 探测结果 ——
+ *    false 拒绝；undefined（未知/探测失败/列表未加载）保守放行（fail-open，
+ *    与 adapter 侧探测失败回退 true 的可用性策略对齐）；其余 Provider 无探测数据放行。
+ */
+
+export type ImageUploadDenialReason =
+  | 'disabled' // 多模态总开关未开启
+  | 'provider-vision' // 当前 Provider 的该模型命名不支持 vision（DeepSeek）
+  | 'probed-no-vision'; // 能力探测明确返回不支持（Ollama）
+
+export interface ImageUploadGateInput {
+  multimodalEnabled: boolean;
+  provider: string;
+  model: string;
+  /**
+   * 模型能力探测缓存（agent-store.modelVisionCaps；modelId → supportsVision）。
+   * 仅记录探测为 false 的条目即可生效（undefined/缺失 = 未知 → 放行）。
+   */
+  visionCaps?: Record<string, boolean>;
+}
+
+export interface ImageUploadGateResult {
+  allowed: boolean;
+  reason?: ImageUploadDenialReason;
+}
+
+export function supportsImageUpload(input: ImageUploadGateInput): ImageUploadGateResult {
+  // 1. 总开关
+  if (!input.multimodalEnabled) {
+    return { allowed: false, reason: 'disabled' };
+  }
+
+  const model = input.model ?? '';
+
+  // 2. DeepSeek 模型级命名防线（非 vision 系列不支持图片，见 DeepSeekAdapter）
+  if (input.provider === 'deepseek') {
+    if (model.length === 0 || !model.includes('vision')) {
+      return { allowed: false, reason: 'provider-vision' };
+    }
+  }
+
+  // 3. Ollama 能力探测（v0.7.3 P1-4 接线 /api/show supportsVision）
+  if (input.provider === 'ollama' && model) {
+    const probed = input.visionCaps?.[model];
+    if (probed === false) {
+      return { allowed: false, reason: 'probed-no-vision' };
+    }
+  }
+
+  return { allowed: true };
+}
diff --git a/src/lib/trace-lifecycle.ts b/src/lib/trace-lifecycle.ts
new file mode 100644
index 0000000..b0eb4e2
--- /dev/null
+++ b/src/lib/trace-lifecycle.ts
@@ -0,0 +1,53 @@
+/**
+ * Trace 生命周期（v0.7.3 P3-3）
+ *
+ * 背景：traceSteps 跨 run 只增不减（saveTraceData 每次全量重写 sessions.metadata），
+ * 长会话单行 metadata 可达数十 MB —— v0.7.2 A4 只裁剪了单条 tool_result 里的
+ * base64，没有约束 run 条目数。现按"保留最近 N 个 run"截断，历史 trace 的完整
+ * 记录仍在 JSONL 录制文件中（TRACE 层），详情面板仅需近程可读性。
+ *
+ * 纯函数、零副作用：可在 node vitest 下直接表测。
+ */
+
+/** 落库保留的最大 run 数（默认 20） */
+export const MAX_TRACE_RUNS = 20;
+
+export interface TraceStepLike {
+  runId?: string;
+}
+
+/**
+ * 按首次出现顺序对 runId 分组，仅保留最近 maxRuns 个 run 的步骤。
+ * 无 runId 的 legacy 步骤各自独立成组（逐条参与淘汰，不整组豁免）。
+ *
+ * @param steps 全量 traceSteps（跨 run 累积）
+ * @param maxRuns 保留的 run 组数上限
+ */
+export function keepRecentRuns<T extends TraceStepLike>(steps: T[], maxRuns = MAX_TRACE_RUNS): T[] {
+  if (steps.length <= 0) return steps;
+
+  // 分组（保持首次出现顺序）；无 runId 的步骤用序号伪分组，避免被误合并
+  const order: string[] = [];
+  const groups = new Map<string, T[]>();
+  for (let i = 0; i < steps.length; i++) {
+    const step = steps[i];
+    const key = step.runId ?? `__legacy_${i}`;
+    const group = groups.get(key);
+    if (group) {
+      group.push(step);
+    } else {
+      groups.set(key, [step]);
+      order.push(key);
+    }
+  }
+
+  // 超限时丢弃最旧的 run 组
+  if (order.length <= maxRuns) return steps;
+  const keepKeys = new Set(order.slice(order.length - maxRuns));
+  const out: T[] = [];
+  for (const key of order) {
+    if (!keepKeys.has(key)) continue;
+    out.push(...groups.get(key)!);
+  }
+  return out;
+}
diff --git a/src/stores/agent-store.ts b/src/stores/agent-store.ts
index 261b9b1..7147dcf 100644
--- a/src/stores/agent-store.ts
+++ b/src/stores/agent-store.ts
@@ -9,11 +9,29 @@ import { useSessionStore } from './session-store';
 // v0.7.2 A4: Trace 落库前复用显示层裁剪（剥离 base64/超长字符串），防止
 // view_image 截图等超大工具结果（单张 ~6.7MB base64）原样写入 sessions.metadata
 import { toDisplayResult } from '../lib/tool-result-display';
+// v0.7.3 P3-3: Trace 生命周期 —— metadata 只保留最近 N 个 run 的步骤
+import { keepRecentRuns } from '../lib/trace-lifecycle';
 
 // L-1: 消息 ID 防碰撞计数器
 let _msgIdCounter = 0;
 export const genMsgId = (role: string) => `msg_${Date.now()}_${role}_${_msgIdCounter++}`;
 
+/**
+ * v0.7.3 P1-2: 按锚点时间戳截断 traceSteps（编辑重发/重新生成的本地侧镜像）。
+ *
+ * DB 侧 truncateMessagesAfter 已同步过滤 metadata.traceSteps（startedAt <
+ * 锚点消息 created_at，严格小于 —— 锚点触发的 run 与消息同毫秒落库，等值
+ * 属于"锚点侧"必须丢弃）；本函数对前端内存态做同一语义的过滤，保证截断后
+ * TraceViewer 不再显示已被撤销轮次的"幽灵步骤"（切换会话再切回时 DB 与
+ * 内存两侧口径一致）。legacy 步骤缺 startedAt 时保守保留（无时间依据可判废）。
+ */
+export function trimTraceStepsByAnchor<T extends { startedAt?: number }>(
+  steps: T[],
+  anchorTimestamp: number,
+): T[] {
+  return steps.filter((s) => typeof s.startedAt !== 'number' || s.startedAt < anchorTimestamp);
+}
+
 /**
  * L-16 修复: 提取上下文窗口默认值为命名常量
  * - Ollama 默认 4096（与 OllamaAdapter.DEFAULT_CONTEXT_WINDOW 保持一致）
@@ -155,6 +173,13 @@ interface AgentState {
    */
   sessionRunStates: Record<string, AgentStatus>;
 
+  /**
+   * v0.7.3 P1-4: 模型视觉能力探测缓存（modelId → supportsVision）。
+   * 仅存探测为 false 的条目即可生效（缺失/undefined = 未知 → 上传门控保守放行）。
+   * 数据源：window.metona.llm.listModels()（Ollama 侧为 /api/show 能力探测）。
+   */
+  modelVisionCaps: Record<string, boolean>;
+
   // Actions
   setCurrentSession: (id: string | null) => void;
   setMessages: (messages: ChatMessage[]) => void;
@@ -193,6 +218,16 @@ interface AgentState {
    * status 传入 null 表示该会话运行已结束（TERMINATED / abort），移除条目。
    */
   updateSessionRunState: (sessionId: string, status: AgentStatus | null) => void;
+  /**
+   * v0.7.3 P1-4: 合并模型能力探测结果（仅记录 supportsVision === false 的模型）。
+   * 供 LLMSettings 加载列表后与 store 刷新动作调用。
+   */
+  applyModelCapabilities: (models: Array<{ id: string; supportsVision?: boolean }>) => void;
+  /**
+   * v0.7.3 P1-4: 拉取 llm:listModels 并合并能力缓存（启动 / Provider 切换 /
+   * Ollama 模型下载完成后调用）。失败静默 —— 门控按未知模型保守放行。
+   */
+  refreshModelCapabilities: () => Promise<void>;
   saveTraceData: () => void;
   clearMessages: () => Promise<void>;
   abort: () => void;
@@ -234,6 +269,8 @@ export const useAgentStore = create<AgentState>((set, get) => ({
   multimodalEnabled: false,
   // v0.7.2 P3-11: 后台会话运行状态图（初始为空）
   sessionRunStates: {},
+  // v0.7.3 P1-4: 模型视觉能力缓存（初始为空 = 全部未知 → 门控保守放行）
+  modelVisionCaps: {},
 
   // ===== Actions =====
 
@@ -620,6 +657,29 @@ export const useAgentStore = create<AgentState>((set, get) => ({
       return { sessionRunStates: { ...s.sessionRunStates, [sessionId]: status } };
     }),
 
+  // v0.7.3 P1-4: 合并模型能力探测结果（supportsVision=false 才入缓存）
+  applyModelCapabilities: (models) =>
+    set((s) => {
+      const additions: Record<string, boolean> = {};
+      for (const m of models) {
+        if (m?.id && m.supportsVision === false) additions[m.id] = false;
+      }
+      if (Object.keys(additions).length === 0) return s;
+      return { modelVisionCaps: { ...s.modelVisionCaps, ...additions } };
+    }),
+
+  // v0.7.3 P1-4: 拉取 llm:listModels 并合并能力缓存（失败静默，门控按未知放行）
+  refreshModelCapabilities: async () => {
+    try {
+      const r = await window.metona?.llm?.listModels?.();
+      if (r?.success && Array.isArray(r.data)) {
+        useAgentStore.getState().applyModelCapabilities(r.data);
+      }
+    } catch {
+      /* 静默 —— 探测不可用时门控按未知模型保守放行 */
+    }
+  },
+
   saveTraceData: () => {
     const { currentSessionId, traceSteps, tokenUsage } = get();
     if (currentSessionId && window.metona?.sessions?.saveTrace) {
@@ -630,7 +690,10 @@ export const useAgentStore = create<AgentState>((set, get) => ({
       // toDisplayResult（dataUrl 剥离 + 任意 >8KB 字符串截断），内存态 traceSteps
       // 在入 store 时已同步瘦身（见 useAgentStream），此处对 restore 自 DB 的
       // 旧格式数据兜底二次裁剪。
-      const sanitizedSteps = traceSteps.map((step) =>
+      // v0.7.3 P3-3: 条目数同样收口 —— 只保留最近 20 个 run 的步骤
+      // （历史 run 的完整记录在 JSONL 录制文件中，metadata 仅需近程可读性）。
+      const recentSteps = keepRecentRuns(traceSteps);
+      const sanitizedSteps = recentSteps.map((step) =>
         step.toolCalls?.length
           ? {
               ...step,
@@ -745,12 +808,15 @@ export const useAgentStore = create<AgentState>((set, get) => ({
     }
 
     // 本地截断（保留之前的消息，重置运行状态）
+    // v0.7.3 P1-2: traceSteps 同步按锚点时间戳过滤 —— DB 侧 truncateMessagesAfter
+    // 已过滤 metadata.traceSteps，此处对内存态做同一语义截断，消除幽灵步骤
     set({
       messages: messages.slice(0, idx),
       agentStatus: 'idle',
       isStreaming: false,
       currentIteration: 0,
       currentRunId: null,
+      traceSteps: trimTraceStepsByAnchor(get().traceSteps, original.timestamp),
     });
 
     // 从原消息附件重建图片参数（附件随消息保留重发）
@@ -802,13 +868,14 @@ export const useAgentStore = create<AgentState>((set, get) => ({
       }
     }
 
-    // 本地截断
+    // 本地截断（v0.7.3 P1-2: traceSteps 同步过滤，语义与 editAndResend 一致）
     set({
       messages: messages.slice(0, lastUserIdx),
       agentStatus: 'idle',
       isStreaming: false,
       currentIteration: 0,
       currentRunId: null,
+      traceSteps: trimTraceStepsByAnchor(get().traceSteps, lastUser.timestamp),
     });
 
     // 重发原内容（含原附件）
diff --git a/src/types/global.d.ts b/src/types/global.d.ts
index a819a42..77691a6 100644
--- a/src/types/global.d.ts
+++ b/src/types/global.d.ts
@@ -127,7 +127,7 @@ interface MetonaSessionsAPI {
   >;
   pin: (sessionId: string, pinned: boolean) => Promise<{ success: boolean; error?: string }>;
   archive: (sessionId: string, archived: boolean) => Promise<{ success: boolean; error?: string }>;
-  deleteMessage: (messageId: string) => Promise<{ success: boolean }>;
+  /** v0.7.3 P1-3: deleteMessage 死通道已移除（消息删除语义由 truncateAfter 覆盖） */
   /** v0.7.2 A1: 语义为"操作完成"（空会话清空同样成功）；失败时携带 error */
   clearMessages: (sessionId: string) => Promise<{ success: boolean; error?: string }>;
   /** P2-11: 截断消息（编辑重发/重新生成） */
@@ -173,9 +173,12 @@ interface MetonaMCPServerConfig {
 
 interface MetonaMCPServerStatus {
   name: string;
-  status: 'connecting' | 'connected' | 'disconnected' | 'error';
+  /** v0.7.3 P4-2: 新增 reconnecting（自动重连排程中，含第 N 次尝试） */
+  status: 'connecting' | 'connected' | 'disconnected' | 'error' | 'reconnecting';
   toolCount: number;
   error?: string;
+  /** v0.7.3 P4-2: reconnecting 状态下的已尝试次数 */
+  reconnectAttempt?: number;
 }
 
 interface MetonaMCPAPI {
@@ -243,6 +246,50 @@ interface MetonaAppAPI {
     | { status: 'up-to-date'; latestVersion: string }
     | { status: 'available'; latestVersion: string; downloadUrl?: string; notes?: string }
   >;
+  /** v0.7.3 P3-4: 健康快照（SLO 指标 + 最近健康检查报告） */
+  getHealthSnapshot: () => Promise<{
+    success: boolean;
+    error?: string;
+    data?: MetonaHealthSnapshot;
+  }>;
+}
+
+// ===== v0.7.3 P3-4: 健康快照载荷 =====
+
+interface MetonaHealthSnapshot {
+  slo: {
+    errorRate: number;
+    throughput: number;
+    avgLatencyMs: number;
+    percentiles: Record<string, number>;
+    burnRate: number;
+    target: number;
+    violated: boolean;
+    totalRequests: number;
+    errorRequests: number;
+    timestamp: string;
+  };
+  health: {
+    healthy: boolean;
+    checks: Array<{ name: string; healthy: boolean; latencyMs?: number; error?: string }>;
+    timestamp: string;
+  } | null;
+  generatedAt: number;
+}
+
+// ===== v0.7.3 P3-3: JSONL 录制文件生命周期 =====
+
+interface MetonaLogsAPI {
+  traceStats: () => Promise<{
+    success: boolean;
+    error?: string;
+    data?: { count: number; totalBytes: number };
+  }>;
+  pruneTraceFiles: () => Promise<{
+    success: boolean;
+    error?: string;
+    data?: { deleted: number };
+  }>;
 }
 
 // ===== Workspace API =====
@@ -314,6 +361,8 @@ interface MetonaModelInfoLite {
   maxOutputTokens?: number;
   supportsToolCalling?: boolean;
   supportsThinking?: boolean;
+  /** v0.7.3 P1-4: 视觉能力（undefined = 未知，前端保守放行；Ollama 探测填充） */
+  supportsVision?: boolean;
   description?: string;
 }
 
@@ -577,6 +626,8 @@ interface MetonaBridge {
   tasks: MetonaTasksAPI;
   audit: MetonaAuditAPI;
   tool: MetonaToolAPI;
+  /** v0.7.3 P3-3: JSONL 录制文件生命周期 */
+  logs: MetonaLogsAPI;
   /** v0.6.4: 托盘动作（新建会话死链接线） */
   tray?: MetonaTrayAPI;
 }