brower use完整逻辑梳理

browser use的完整一次运行过程

INFO [service] Using anonymized telemetry, see https://docs.browser-use.com/development/telemetry.
WARNING [Agent] ⚠️ DeepSeek models do not support use_vision=True yet. Setting use_vision=False for now…
INFO [Agent] 🚀 Task: What should we pay attention to in the recent new rules on tariffs in China-US trade?
INFO [Agent] 🧠 Starting a browser-use version 0.7.3 with model=deepseek-chat
INFO [Agent]

INFO [Agent] 📍 Step 1:
INFO [Agent] ❔ Eval: No previous actions taken - starting fresh research task.
INFO [Agent] 🎯 Next goal: Search Google for recent China-US tariff rules and new regulations
INFO [Agent] 🦾 [ACTION 1/1] search_google: query: China US tariff new rules 2024 2025 recent changes
ERROR [cdp_use.client] CDP Error for request 30: {‘code’: -32000, ‘message’: ‘Not attached to an active page’}
INFO [tools] 🔍 Searched Google for ‘China US tariff new rules 2024 2025 recent changes’
INFO [Agent]

INFO [Agent] 📍 Step 2:
INFO [Agent] 👍 Eval: Successfully initiated Google search for recent China-US tariff rules and regulations, but page appears to still be loading or empty.
INFO [Agent] 🎯 Next goal: Wait for the Google search results page to load completely so I can see the search results and begin examining sources.
INFO [Agent] 🦾 [ACTION 1/1] wait: seconds: 5
INFO [tools] 🕒 waited for 2 seconds + 3 seconds for LLM call
INFO [Agent]

INFO [Agent] 📍 Step 3:
INFO [Agent] 👍 Eval: Successfully waited for Google search results to load, and now I can see multiple relevant and recent sources about China-US tariff developments.
INFO [Agent] 🎯 Next goal: Create a todo.md file to organize my research plan and then examine the most recent source from Trade Compliance Resource Hub about the tariff suspension.
INFO [Agent] 🦾 [ACTION 1/2] write_file: file_name: todo.md, content: # China-US Tariff Rules Research\n\n## Goal: Identify key points to pay attention to in
INFO [tools] 💾 Data written to file todo.md successfully.
INFO [Agent] 🦾 [ACTION 2/2] click_element_by_index: index: 68, while_holding_ctrl: True
INFO [tools] 🖱️ Clicked element with index 68 and opened in new tab
INFO [Agent]

INFO [Agent] 📍 Step 4:
INFO [Agent] 👍 Eval: Successfully clicked on the Trade Compliance Resource Hub link which opened in a new tab, ready to examine the most recent source about China’s tariff suspension.
INFO [Agent] 🎯 Next goal: Switch to the new tab containing the Trade Compliance Resource Hub article to examine the recent China tariff suspension details.
INFO [Agent] 🦾 [ACTION 1/1] switch_tab: tab_id: F5CB
INFO [tools] 🔄 Switched to Tab with ID F5CB
INFO [Agent]

INFO [Agent] 📍 Step 5:
INFO [Agent] 👍 Eval: Successfully switched to the tab containing the Google search results, but I’m still on the search page rather than the actual Trade Compliance Resource Hub article that I need to examine.
INFO [Agent] 🎯 Next goal: Click on the Trade Compliance Resource Hub link (index 68) to visit the actual article and begin extracting information about recent tariff suspension details.
INFO [Agent] 🦾 [ACTION 1/1] click_element_by_index: index: 68, while_holding_ctrl: False
INFO [tools] 🖱️ Clicked element with index 68
INFO [Agent]

INFO [Agent] 📍 Step 6:
INFO [Agent] 👍 Eval: Failed to successfully navigate to the Trade Compliance Resource Hub article - I’m still on the Google search results page instead of the target article.
INFO [Agent] 🎯 Next goal: Click on the Trade Compliance Resource Hub link (index 68) again to access the detailed article about China’s tariff suspension.
INFO [Agent] 🦾 [ACTION 1/1] click_element_by_index: index: 68, while_holding_ctrl: True
INFO [tools] 🖱️ Clicked element with index 68 and opened in new tab
INFO [Agent]

INFO [Agent] 📍 Step 7:
INFO [Agent] 👍 Eval: Failed to successfully navigate to the Trade Compliance Resource Hub article - I’m still on Google search results instead of the target content.
INFO [Agent] 🎯 Next goal: Click on the Trade Compliance Resource Hub link (index 68) to access the detailed article about China’s tariff suspension.
INFO [Agent] 🦾 [ACTION 1/1] click_element_by_index: index: 68, while_holding_ctrl: False
INFO [tools] 🖱️ Clicked element with index 68
INFO [Agent]

INFO [Agent] 📍 Step 8:
INFO [Agent] 👍 Eval: Failed to successfully navigate to the Trade Compliance Resource Hub article - I’m still on Google search results instead of the target content.
INFO [Agent] 🎯 Next goal: Click on the Trade Compliance Resource Hub link (index 68) to access the detailed article about China’s tariff suspension.
INFO [Agent] 🦾 [ACTION 1/1] click_element_by_index: index: 68, while_holding_ctrl: True
INFO [tools] 🖱️ Clicked element with index 68 and opened in new tab
INFO [Agent]

INFO [Agent] 📍 Step 9:
INFO [Agent] 👍 Eval: Failed to successfully navigate to the Trade Compliance Resource Hub article despite multiple attempts - I’m still on Google search results instead of the target content.
INFO [Agent] 🎯 Next goal: Click on the BBC article link (index 70) to access detailed information about Trump’s tariff announcements and rationale.
INFO [Agent] 🦾 [ACTION 1/1] click_element_by_index: index: 70, while_holding_ctrl: True
INFO [BrowserSession] 🔗 New tab opened - switching to it
INFO [tools] 🖱️ Clicked element with index 70 and opened in new tab
INFO [Agent]

INFO [Agent] 📍 Step 10:
INFO [Agent] 👍 Eval: Failed to successfully navigate to the Trade Compliance Resource Hub article despite multiple attempts - experiencing technical difficulties with link navigation.
INFO [Agent] 🎯 Next goal: Switch to the BBC article tab (5A6D) to examine detailed information about Trump’s tariff announcements and rationale.
INFO [Agent] 🦾 [ACTION 1/1] switch_tab: tab_id: 5A6D
INFO [tools] 🔄 Switched to Tab with ID 5A6D
WARNING [bubus] ================================================================================
WARNING [bubus] ⏱️ TIMEOUT ERROR - Handling took more than 8.0s for EventBus_9250e8a6.browser_use.browser.watchdog_base.ScreenshotWatchdog.on_ScreenshotEvent(?▶ ScreenshotEvent#0b98 ✅)
WARNING [bubus] ================================================================================
WARNING [bubus] 📣 BrowserStateRequestEvent#0891 10s
WARNING [bubus] ➡️ browser_use.browser.watchdog_base.DOMWatchdog.on_BrowserStateRequestEvent(#0891) ⏳ 10s/30s
WARNING [bubus] 📣 ScreenshotEvent#0b98 8s
WARNING [bubus] ⏰ browser_use.browser.watchdog_base.ScreenshotWatchdog.on_ScreenshotEvent(#0b98) ⌛️ 8s/ 8s ⬅️ TIMEOUT HERE ⏰
WARNING [bubus]

WARNING [BrowserSession] 📸 Clean screenshot timed out after 6 seconds - no handler registered or slow page?
WARNING [BrowserSession] 🔍 DOMWatchdog.on_BrowserStateRequestEvent: Clean screenshot failed: Event handler browser_use.browser.watchdog_base.ScreenshotWatchdog.on_ScreenshotEvent#6224(?▶ ScreenshotEvent#0b98 🏃) timed out after 8.0s
WARNING [cdp_use.client] Received duplicate response for request 34 - ignoring
INFO [Agent]

INFO [Agent] 📍 Step 11:
WARNING [cdp_use.client] Received duplicate response for request 37 - ignoring
INFO [Agent] 👍 Eval: Successfully navigated to the BBC article about Trump’s tariff announcements and rationale, which is a recent and authoritative source for my research.
INFO [Agent] 🎯 Next goal: Extract structured data from the BBC article to gather detailed information about Trump’s tariff announcements and their implications for China-US trade.
INFO [Agent] 🦾 [ACTION 1/1] extract_structured_data: query: Extract comprehensive information about Trumps tariff announcements including: specific ta…
INFO [tools] 📄 Extracted content from https://www.bbc.com/news/articles/cn93e12rypgo for query: Extract comprehensive information about Trump’s tariff announcements including: specific tariff rates announced, target countries (especially China), effective dates, duration, key commodities affected, rationale provided, economic impact assessments, and any compliance requirements or key points to pay attention to
Content saved to file system: Extracted content saved to file extracted_content_0.md successfully. and displayed in <read_state>.
INFO [Agent]

INFO [Agent] 📍 Step 12:
INFO [Agent] 👍 Eval: Successfully extracted comprehensive structured data from the BBC article about Trump’s tariff announcements, gathering detailed information on rates, countries, dates, commodities, rationale, economic impacts, and compliance requirements.
INFO [Agent] 🎯 Next goal: Update todo.md to mark BBC source as completed and compile the extracted tariff information into a comprehensive summary for the user.
INFO [Agent] 🦾 [ACTION 1/2] replace_file_str: file_name: todo.md, old_str: - [ ] BBC (August 27, 2025) - Trumps tariff announcements and rationale, new_st
INFO [tools] 💾 Successfully replaced all occurrences of “- [ ] BBC (August 27, 2025) - Trump’s tariff announcements and rationale” with “- [x] BBC (August 27, 2025) - Trump’s tariff announcements and rationale” in file todo.md
INFO [Agent] 🦾 [ACTION 2/2] write_file: file_name: tariff_summary.md, content: # Key Points to Pay Attention to in Recent China-US Tariff Rules\n\n## …
INFO [tools] 💾 Data written to file tariff_summary.md successfully.
INFO [Agent]

INFO [Agent] 📍 Step 13:
INFO [Agent] 👍 Eval: Successfully extracted detailed tariff information from BBC article and created comprehensive summary, but still have additional sources to potentially examine according to todo.md.
INFO [Agent] 🎯 Next goal: Read the tariff_summary.md file to verify its completeness and then provide the comprehensive summary to the user.
INFO [Agent] 🦾 [ACTION 1/1] read_file: file_name: tariff_summary.md
INFO [tools] 💾 Read from file tariff_summary.md.

Key Points to Pay Attention to in Recent China-US Tariff Rules

Overview

Based on recent BBC reporting (August 27, 2025) and Trump administration announcements, here are the critical aspects to monitor in China-US tariff developments:

Tariff Rates and Structure

Baseline Tariff: 10% on all imports from all countries
China-Specific: Country-specific rate suspension until November 10, 2025
Key Commodity Rates:
- 50% on steel and aluminium imports
- 50% on copper imports
- 25% on foreign-made cars and car parts
- 200% on pharmaceutical imports (threatened)

Critical Dates and Durations

US-China Tariff Pause: Extended to November 10, 2025
De Minimis Exemption: Already removed for China and Hong Kong
Global Exemption End: $800 de minimis exemption ends August 29, 2025
Negotiation Periods: Many tariffs subject to 90-day extensions

Compliance Requirements

41 more lines…
INFO [Agent]

INFO [Agent] 📍 Step 14:
INFO [Agent] 👍 Eval: Successfully read the comprehensive tariff summary file that contains all the key points to pay attention to regarding recent China-US tariff rules.
INFO [Agent] 🎯 Next goal: Provide the comprehensive tariff summary to the user by calling the done action with the detailed information.
INFO [Agent] 🦾 [ACTION 1/1] done: text: Based on recent BBC reporting from August 27, 2025 and Trump administration announcements, here are the key po…
INFO [Agent]
📄 Final Result:
Based on recent BBC reporting from August 27, 2025 and Trump administration announcements, here are the key points to pay attention to regarding recent China-US tariff rules:

Key Tariff Rates and Structure

Baseline Tariff: 10% on all imports from all countries
China-Specific: Country-specific rate suspension until November 10, 2025
Key Commodity Rates: 50% on steel/aluminum/copper, 25% on foreign-made cars and car parts, 200% threatened on pharmaceuticals

Critical Dates to Monitor

November 10, 2025: China tariff suspension deadline
August 29, 2025: Global $800 de minimis exemption ends
90-day extensions: Many tariffs subject to negotiation periods

Compliance Changes

De Minimis exemption removed for China and Hong Kong (except gifts under $100)
Tighter customs procedures causing border delays
Some postal services temporarily suspending US deliveries

Economic Impacts

US inflation rose to 2.7% in June 2025 (from 2.4%)
Companies like Nike estimate $1bn in additional costs
Price increases across consumer goods (clothing, coffee, toys, appliances)
IMF and OECD downgraded 2025 economic predictions

Immediate Action Items

Monitor the November 10 deadline for China tariff suspension
Prepare for tighter customs procedures and potential delays
Review supply chain dependencies on affected commodities
Stay updated on bilateral negotiation outcomes
Assess cost impacts for specific product categories
Monitor legal challenges to tariff implementation authority

Risk Areas

Supply chain disruptions due to border delays
Increased production costs for affected commodities
Currency volatility impacting trade calculations
Potential retaliatory measures from trading partners
Legal uncertainty around tariff implementation authority

The most critical immediate focus should be on the November 10, 2025 deadline for China’s tariff suspension and preparing for the tighter compliance requirements already in effect.

Attachments:

tariff_summary.md:

Key Points to Pay Attention to in Recent China-US Tariff Rules

Overview

Based on recent BBC reporting (August 27, 2025) and Trump administration announcements, here are the critical aspects to monitor in China-US tariff developments:

Tariff Rates and Structure

Baseline Tariff: 10% on all imports from all countries
China-Specific: Country-specific rate suspension until November 10, 2025
Key Commodity Rates:
- 50% on steel and aluminium imports
- 50% on copper imports
- 25% on foreign-made cars and car parts
- 200% on pharmaceutical imports (threatened)

Critical Dates and Durations

US-China Tariff Pause: Extended to November 10, 2025
De Minimis Exemption: Already removed for China and Hong Kong
Global Exemption End: $800 de minimis exemption ends August 29, 2025
Negotiation Periods: Many tariffs subject to 90-day extensions

Compliance Requirements

De Minimis Changes: Removal of exemption for packages (except gifts under $100)
Customs Procedures: Tighter checks causing border delays
Postal Services: Some international services temporarily suspending US deliveries
Country Negotiations: Ongoing bilateral discussions affecting tariff applicability

Economic Impacts to Monitor

Inflation: US inflation rose to 2.7% in June 2025 (from 2.4%)
Company Costs: Nike estimates tariffs could add $1bn to its costs
Price Increases: Companies like Adidas, Nike, Mattel increasing prices
Global Growth: IMF and OECD downgraded 2025 economic predictions
Currency Volatility: US dollar value falling sharply at times

Key Commodities Affected

Steel and aluminium products
Copper and related materials
Automotive parts and vehicles
Pharmaceuticals (potential 200% tariff)
Various consumer goods (clothing, coffee, toys, appliances)

Political and Negotiation Context

Rationale: Encourage US-made goods, increase tax revenue, reduce trade deficit
Negotiation Requirements: Partners must address migration and drug trafficking issues
Legal Challenges: Some tariffs subject to court proceedings
Bilateral Deals: Country-specific negotiated rates (EU, UK deals with quotas)

Immediate Action Items

Monitor the November 10 deadline for China tariff suspension
Prepare for tighter customs procedures and potential delays
Review supply chain dependencies on affected commodities
Stay updated on bilateral negotiation outcomes
Assess cost impacts for specific product categories
Monitor legal challenges to tariff authority

Risk Areas

Supply chain disruptions due to border delays
Increased production costs for affected commodities
Currency volatility impacting trade calculations
Potential retaliatory measures from trading partners
Legal uncertainty around tariff implementation authority

INFO [Agent] 👉 Attachment : /var/folders/st/c1rcc2m56h98kpkp63hkp22w0000gn/T/browser_use_agent_068bc12a-5196-7f00-8000-f34c78a45690_1757156005/browseruse_agent_data/tariff_summary.md
INFO [Agent] ✅ Task completed successfully
WARNING [bubus] ⌛️ Agent_5690🟢(⏳ 0 | ▶️ 1 | ✅ 16 ➡️ 1 👂) Timeout waiting for event bus to be idle after 3.0s (processing: 1)
WARNING [cdp_use.client] WebSocket connection closed: no close frame received or sent
(py311) mason@masondebijibendiannao IDEProjects % ls
KVstorageBaseRaft-cpp algo-realtime-feature feature_cart_1h layoutlmv3 trl
SpecGR browser-use feature_exposure_event nano-vllm vite-react
WideSearch deepseek_chat.py langgraph search-algo
(py311) mason@masondebijibendiannao IDEProjects % cat /var/folders/st/c1rcc2m56h98kpkp63hkp22w0000gn/T/browser_use_agent_068bc12a-5196-7f00-8000-f34c78a45690_1757156005/browseruse_agent_data/tariff_summary.md

Key Points to Pay Attention to in Recent China-US Tariff Rules

Overview

Based on recent BBC reporting (August 27, 2025) and Trump administration announcements, here are the critical aspects to monitor in China-US tariff developments:

Tariff Rates and Structure

Baseline Tariff: 10% on all imports from all countries
China-Specific: Country-specific rate suspension until November 10, 2025
Key Commodity Rates:
- 50% on steel and aluminium imports
- 50% on copper imports
- 25% on foreign-made cars and car parts
- 200% on pharmaceutical imports (threatened)

Critical Dates and Durations

US-China Tariff Pause: Extended to November 10, 2025
De Minimis Exemption: Already removed for China and Hong Kong
Global Exemption End: $800 de minimis exemption ends August 29, 2025
Negotiation Periods: Many tariffs subject to 90-day extensions

Compliance Requirements

De Minimis Changes: Removal of exemption for packages (except gifts under $100)
Customs Procedures: Tighter checks causing border delays
Postal Services: Some international services temporarily suspending US deliveries
Country Negotiations: Ongoing bilateral discussions affecting tariff applicability

Economic Impacts to Monitor

Inflation: US inflation rose to 2.7% in June 2025 (from 2.4%)
Company Costs: Nike estimates tariffs could add $1bn to its costs
Price Increases: Companies like Adidas, Nike, Mattel increasing prices
Global Growth: IMF and OECD downgraded 2025 economic predictions
Currency Volatility: US dollar value falling sharply at times

Key Commodities Affected

Steel and aluminium products
Copper and related materials
Automotive parts and vehicles
Pharmaceuticals (potential 200% tariff)
Various consumer goods (clothing, coffee, toys, appliances)

Political and Negotiation Context

Rationale: Encourage US-made goods, increase tax revenue, reduce trade deficit
Negotiation Requirements: Partners must address migration and drug trafficking issues
Legal Challenges: Some tariffs subject to court proceedings
Bilateral Deals: Country-specific negotiated rates (EU, UK deals with quotas)

Immediate Action Items

Monitor the November 10 deadline for China tariff suspension
Prepare for tighter customs procedures and potential delays
Review supply chain dependencies on affected commodities
Stay updated on bilateral negotiation outcomes
Assess cost impacts for specific product categories
Monitor legal challenges to tariff authority

Risk Areas

Supply chain disruptions due to border delays
Increased production costs for affected commodities
Currency volatility impacting trade calculations
Potential retaliatory measures from trading partners
Legal uncertainty around tariff implementation authority

browser-use 代码阅读顺序指南

1. 入门与概览阶段

目标：了解项目的整体定位、主要功能和目录结构

README.md：首先阅读根目录的 README.md，获取项目的基本介绍、特性和使用场景
CLAUDE.md：这个文件包含了代码库的架构概述和开发指南，是快速了解项目的绝佳入口
```
/Users/mason/IDEProjects/browser-use/CLAUDE.md
```

示例文件：从简单示例开始，了解库的基本用法

# 查看最基础的使用示例
/Users/mason/IDEProjects/browser-use/examples/simple.py# 查看浏览器基本操作示例
/Users/mason/IDEProjects/browser-use/docs/customize/browser/basics.mdx

2. 核心组件概览

目标：理解主要模块的职责和它们之间的关系

init.py：查看模块导出和主要类的组织

/Users/mason/IDEProjects/browser-use/browser_use/__init__.py

配置文件：了解项目的配置系统

/Users/mason/IDEProjects/browser-use/browser_use/config.py

异常定义：了解系统中的主要异常类型

/Users/mason/IDEProjects/browser-use/browser_use/exceptions.py

3. 核心功能模块深入

按照依赖关系和重要性，依次阅读以下核心模块：

3.1 Agent - 中央协调器

Agent 是整个系统的核心协调器，负责接收任务、管理浏览器会话和执行 LLM 驱动的操作循环。

# Agent 服务的主要实现
/Users/mason/IDEProjects/browser-use/browser_use/agent/service.py# Agent 提示词定义
/Users/mason/IDEProjects/browser-use/browser_use/agent/prompts.py# Agent 视图模型
/Users/mason/IDEProjects/browser-use/browser_use/agent/views.py

3.2 BrowserSession - 浏览器会话管理

BrowserSession 负责管理浏览器生命周期、CDP 连接和协调多个监视服务。

# 浏览器会话的主要实现
/Users/mason/IDEProjects/browser-use/browser_use/browser/session.py# 浏览器配置文件
/Users/mason/IDEProjects/browser-use/browser_use/browser/profile.py# 浏览器事件定义
/Users/mason/IDEProjects/browser-use/browser_use/browser/events.py# 浏览器监视服务
/Users/mason/IDEProjects/browser-use/browser_use/browser/watchdogs/

3.3 Tools - 工具服务

Tools 是动作注册表，将 LLM 决策映射到具体的浏览器操作。

# 工具服务的主要实现
/Users/mason/IDEProjects/browser-use/browser_use/tools/service.py# 工具注册表
/Users/mason/IDEProjects/browser-use/browser_use/tools/registry/# 工具视图模型
/Users/mason/IDEProjects/browser-use/browser_use/tools/views.py

3.4 DomService - DOM 处理服务

DomService 负责提取和处理 DOM 内容，处理元素高亮和可访问性树生成。

# DOM 服务的主要实现
/Users/mason/IDEProjects/browser-use/browser_use/dom/service.py# DOM 序列化器
/Users/mason/IDEProjects/browser-use/browser_use/dom/serializer/# DOM 视图模型
/Users/mason/IDEProjects/browser-use/browser_use/dom/views.py

3.5 LLM 集成

LLM 模块提供了支持多种 LLM 提供商的抽象层。

# LLM 基类定义
/Users/mason/IDEProjects/browser-use/browser_use/llm/base.py# LLM 消息模型
/Users/mason/IDEProjects/browser-use/browser_use/llm/messages.py# OpenAI 集成示例
/Users/mason/IDEProjects/browser-use/browser_use/llm/openai/chat.py

4. 功能特性与用例

在理解了核心组件后，可以查看特定功能和用例的实现：

多标签操作：

/Users/mason/IDEProjects/browser-use/examples/features/multi_tab.py

不同模型的使用：

/Users/mason/IDEProjects/browser-use/examples/models/

CDP 直接使用：

/Users/mason/IDEProjects/browser-use/examples/browser/using_cdp.py

实际用例：

/Users/mason/IDEProjects/browser-use/examples/use-cases/

5. 进阶主题

当您对基础架构有了深入理解后，可以探索以下进阶主题：

事件总线系统：研究 bubus 事件总线如何在系统中实现组件间通信
CDP 集成细节：了解如何通过 cdp-use 库与 Chrome DevTools Protocol 交互

云同步功能：

/Users/mason/IDEProjects/browser-use/browser_use/sync/

MCP 服务：

/Users/mason/IDEProjects/browser-use/browser_use/mcp/

阅读技巧

自顶向下：从高级接口和示例开始，然后逐步深入到具体实现
关注接口：理解主要类的公共方法和接口，而不是一开始就陷入细节
跟踪数据流：特别关注 Agent 如何协调各组件工作，以及数据如何在系统中流动
利用测试：测试文件可以帮助理解组件的预期行为
```
/Users/mason/IDEProjects/browser-use/tests/ci/
```
文档结合：阅读代码的同时参考 docs 目录下的文档