ByteDance Trae-Agent Structure
Project Tree Structure with Design Pattern Mapping
trae-agent/
├── 📁 trae_agent/ # Main Application Package
│ ├── 📁 agent/ # 🎯 STRATEGY + TEMPLATE METHOD + FACTORY
│ │ ├── base_agent.py # Template Method Pattern (workflow definition)
│ │ ├── specialized_agents.py # Strategy Pattern (different AI behaviors)
│ │ ├── agent_factory.py # Factory Pattern (agent creation)
│ │ └── agent_manager.py # Registry Pattern (agent lookup)
│ │
│ ├── 📁 prompt/ # 🏗️ BUILDER + TEMPLATE METHOD
│ │ ├── prompt_builder.py # Builder Pattern (flexible prompt construction)
│ │ ├── template_manager.py # Template Method (standard prompt formats)
│ │ └── prompt_optimizer.py # Strategy Pattern (optimization algorithms)
│ │
│ ├── 📁 tools/ # 🔧 COMMAND + REGISTRY + FACTORY
│ │ ├── base_tool.py # Command Pattern (tool interface)
│ │ ├── tool_registry.py # Registry Pattern (tool management)
│ │ ├── tool_factory.py # Factory Pattern (tool instantiation)
│ │ └── implementations/ # Concrete Commands
│ │ ├── bash_tool.py # Command: Bash execution
│ │ ├── file_tool.py # Command: File operations
│ │ └── web_tool.py # Command: Web interactions
│ │
│ └── 📁 utils/ # 🔧 UTILITY + CONFIGURATION
│ ├── config_manager.py # Configuration Pattern
│ ├── logger.py # Observer Pattern (logging)
│ └── validators.py # Validation utilities
│
├── 📁 docs/ # Documentation
├── 📁 evaluation/ # 📊 OBSERVER PATTERN
│ ├── trajectory_recorder.py # Observer: Recording agent behavior
│ ├── performance_monitor.py # Observer: Performance tracking
│ └── evaluator.py # Template Method: Standard evaluation
│
├── 📁 tests/ # Testing Infrastructure
├── 🐍 cli.py # 🎭 FACADE PATTERN
│ # Simplified interface to complex system
├── ⚙️ trae_config.json.example # Configuration Pattern
├── ⚙️ trae_config.yaml.example # Configuration Pattern
└── 📦 pyproject.toml # Modern Python packagingDesign Pattern Interactions & Effects
┌─────────────────────────────────────────────────────────────────────┐
│ 🎭 CLI FACADE PATTERN │
│ ┌─────────────────────────────────────────────────────────────┐ │
│ │ Simplified User Interface │ │
│ │ • Single entry point for all operations │ │
│ │ • Hides complex subsystem interactions │ │
│ │ • Configuration-driven behavior │ │
│ └─────────────────────────────────────────────────────────────┘ │
└──┬──────────────────────────────────────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────────────────────┐
│ 🏭 AGENT CREATION & MANAGEMENT │
│ │
│ 🎯 STRATEGY PATTERN 🏗️ FACTORY PATTERN 📚 REGISTRY │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────┐ │
│ │ Code Agent │◄──────┤ Agent Factory │◄───┤ Agent │ │
│ │ Research Agent │ │ • Creates agents│ │ Registry │ │
│ │ Writing Agent │ │ • Type-based │ │ • Lookup │ │
│ │ General Agent │ │ selection │ │ • Discovery │ │
│ └─────────────────┘ └─────────────────┘ └─────────────┘ │
│ │ │ │ │
│ ▼ ▼ ▼ │
│ 📋 TEMPLATE METHOD │
│ ┌─────────────────────────────────────────────────────────────┐ │
│ │ Standard Agent Workflow: │ │
│ │ 1. validate_input() ──► 2. process_task() ──► 3. format() │ │
│ │ ▲ │ │
│ │ Customizable Step │ │
│ └─────────────────────────────────────────────────────────────┘ │
└──┬──────────────────────────────────────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────────────────────┐
│ 🔧 TOOL SYSTEM ARCHITECTURE │
│ │
│ 💻 COMMAND PATTERN 🏭 TOOL FACTORY 📚 TOOL REGISTRY │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────┐ │
│ │ BashTool.exe() │◄──────┤ Tool Factory │◄───┤ Tool │ │
│ │ FileTool.exe() │ │ • Type-based │ │ Registry │ │
│ │ WebTool.exe() │ │ creation │ │ • Dynamic │ │
│ │ CustomTool.exe()│ │ • Validation │ │ discovery │ │
│ └─────────────────┘ └─────────────────┘ └─────────────┘ │
│ │ │ │ │
│ ▼ │ ▼ │
│ 🔄 COMMAND EXECUTION PIPELINE │
│ ┌─────────────────────────────────────────────────────────────┐ │
│ │ Agent Request ──► Tool Selection ──► Command Execution │ │
│ │ │ │ │ │ │
│ │ ▼ ▼ ▼ │ │
│ │ Validation Registry Lookup Execute & Log │ │
│ └─────────────────────────────────────────────────────────────┘ │
└──┬──────────────────────────────────────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────────────────────┐
│ 👁️ MONITORING & OBSERVATION SYSTEM │
│ │
│ 📊 OBSERVER PATTERN │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ Trajectory │ │ Performance │ │ Error │ │
│ │ Recorder │ │ Monitor │ │ Handler │ │
│ │ • Action logs │ │ • Response time │ │ • Exception │ │
│ │ • Decision tree │ │ • Resource use │ │ tracking │ │
│ │ • State changes │ │ • Success rate │ │ • Recovery │ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
│ │ │ │ │
│ └───────────────────────┼───────────────────────┘ │
│ ▼ │
│ 🔍 ANALYSIS & RESEARCH INSIGHTS │
│ ┌─────────────────────────────────────────────────────────────┐ │
│ │ • Agent behavior analysis │ │
│ │ • Performance optimization insights │ │
│ │ • Debugging and troubleshooting data │ │
│ │ • Research reproducibility │ │
│ └─────────────────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────────────────┘Pattern Synergies & Combined Effects
🔄 Pattern Collaboration Flow
USER REQUEST
│
▼
🎭 FACADE (cli.py)
│ Simplifies complex operations
▼
🏭 FACTORY + 📚 REGISTRY
│ Creates appropriate agent
▼
📋 TEMPLATE METHOD + 🎯 STRATEGY
│ Standardized workflow + Custom behavior
▼
🔧 COMMAND + 🏭 TOOL FACTORY
│ Executes tools through commands
▼
👁️ OBSERVER PATTERN
│ Monitors and records everything
▼
RESULT + INSIGHTS🎯 Achieved System Properties
Pattern Combination
System Property
Benefit
Facade + Factory
Easy to Use
Single interface, automatic object creation
Strategy + Template Method
Flexible Workflows
Standard process, customizable behavior
Command + Registry
Extensible Tools
Dynamic tool discovery, plugin architecture
Observer + All Patterns
Transparent Operations
Full system observability for research
Factory + Strategy
Provider Independence
Easy switching between AI models/providers
Registry + Command
Plugin Architecture
Community extensibility, tool marketplace
🏢 Enterprise-Grade Features Enabled
┌─────────────────────────────────────────────────────────────────┐
│ PRODUCTION CAPABILITIES │
├─────────────────────────────────────────────────────────────────┤
│ 🔄 Multi-Provider Support │ Factory + Strategy patterns │
│ 🛡️ Error Resilience │ Command + Observer patterns │
│ 📈 Performance Monitoring │ Observer + Template Method │
│ 🔌 Plugin Extensibility │ Registry + Factory patterns │
│ 🎯 Intelligent Routing │ Strategy + Chain of Resp. │
│ 📊 Research Analytics │ Observer + Command patterns │
│ ⚙️ Configuration Management │ Configuration + Factory │
│ 🧪 A/B Testing Support │ Strategy + Observer patterns │
└─────────────────────────────────────────────────────────────────┘Key Insights
Why This Architecture Works
🎭 Facade Pattern: Provides simple CLI interface while hiding system complexity
🏭 Factory Ecosystem: Creates consistent object families (agents, tools, providers)
📋 Template Method: Ensures consistent behavior while allowing customization
👁️ Observer Network: Enables complete system transparency for research
🔧 Command System: Makes operations reversible, loggable, and extensible
Pattern Integration Benefits
Maintainability: Clear boundaries between components
Extensibility: Easy to add new agents, tools, and providers
Observability: Complete transparency for research and debugging
Reliability: Robust error handling and recovery mechanisms
Performance: Optimized workflows with intelligent routing
This architecture demonstrates how multiple design patterns work together to create a sophisticated, research-friendly AI agent system that balances power with usability.
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