# Agent Factory Implementation Summary

## Completed Work

### 1. Core Components Created

#### AgentDefinitionLoader (Already Existed)
- **File**: `codeframe/agents/definition_loader.py`
- **Purpose**: Load and validate YAML agent definitions
- **Features**:
  - Loads from `definitions/` and `definitions/custom/`
  - Validates required fields and data types
  - Caches definitions for performance
  - Supports reload for hot updates

#### AgentFactory (NEW)
- **File**: `codeframe/agents/factory.py`
- **Purpose**: Create agents from YAML definitions
- **Key Methods**:
  - `create_agent(agent_type, agent_id, provider, **kwargs)` - Create agent instance
  - `list_available_agents()` - Get all available agent types
  - `get_agent_capabilities(agent_type)` - Query capabilities
  - `get_agent_definition(agent_type)` - Get full definition
  - `get_agents_by_type(type_category)` - Filter by category
  - `reload_definitions()` - Reload YAML files

#### WorkerAgent Enhancement
- **File**: `codeframe/agents/worker_agent.py`
- **Change**: Added `system_prompt` parameter to constructor
- **Backward Compatible**: Optional parameter, defaults to None

### 2. YAML Agent Definitions

Created 4 new agent definition files:

#### backend-worker.yaml
- **Type**: backend
- **Maturity**: D1
- **Purpose**: General-purpose backend task execution
- **Backward Compatible**: Matches existing BackendWorkerAgent behavior

#### test-engineer.yaml
- **Type**: test
- **Maturity**: D2
- **Purpose**: Test automation and TDD specialist
- **Capabilities**: Unit/integration/E2E testing, coverage analysis

#### code-reviewer.yaml
- **Type**: review
- **Maturity**: D3
- **Purpose**: Code quality and security review
- **Capabilities**: Security scanning, performance analysis, architecture review

Already existed:
- `backend-architect.yaml` (D2 - API design, DB optimization)
- `frontend-specialist.yaml` (D2 - React/Vue/Angular, component architecture)

### 3. Updated Exports

**File**: `codeframe/agents/__init__.py`

Added exports:
- `AgentFactory`
- `AgentDefinitionLoader`
- `AgentDefinition`

Existing exports maintained:
- `LeadAgent`
- `WorkerAgent`

### 4. Comprehensive Testing

**File**: `tests/test_agent_factory.py`

**21 tests, all passing**:
- ✅ Factory initialization
- ✅ List available agents
- ✅ Create all agent types (backend-worker, backend-architect, frontend-specialist, test-engineer, code-reviewer)
- ✅ Get agent capabilities
- ✅ Custom maturity override
- ✅ Error handling (unknown types)
- ✅ Agent definition queries
- ✅ Type filtering
- ✅ Backward compatibility with BackendWorkerAgent
- ✅ Backward compatibility with direct WorkerAgent instantiation
- ✅ System prompt injection
- ✅ Reload functionality

### 5. Documentation

Created comprehensive guides:
- `docs/AGENT_FACTORY_GUIDE.md` - Full user guide with examples
- `docs/AGENT_FACTORY_SUMMARY.md` - This summary

## Backward Compatibility

✅ **100% Backward Compatible**

### Existing Code Works Unchanged

```python
# Old Way 1: Direct WorkerAgent instantiation - STILL WORKS
from codeframe.agents import WorkerAgent

agent = WorkerAgent(
    agent_id="old-001",
    agent_type="backend",
    provider="claude",
    maturity=AgentMaturity.D1
)

# Old Way 2: BackendWorkerAgent - STILL WORKS
from codeframe.agents.backend_worker_agent import BackendWorkerAgent

backend_agent = BackendWorkerAgent(
    project_id=1,
    db=db,
    codebase_index=index,
    provider="claude"
)
```

### New Recommended Way

```python
# New Factory Approach
from codeframe.agents import AgentFactory

factory = AgentFactory()

# Create specialized agents easily
architect = factory.create_agent("backend-architect", "arch-001", "claude")
reviewer = factory.create_agent("code-reviewer", "review-001", "claude")
tester = factory.create_agent("test-engineer", "test-001", "claude")

# Access rich metadata
print(architect.capabilities)
print(reviewer.tools)
```

## Example Usage

### Basic Agent Creation

```python
from codeframe.agents import AgentFactory

factory = AgentFactory()

# Create a backend architect
agent = factory.create_agent(
    agent_type="backend-architect",
    agent_id="architect-001",
    provider="claude"
)

# Agent has system prompt from YAML
print(agent.system_prompt)  # "You are a backend architecture specialist..."

# Agent has capabilities from YAML
print(agent.capabilities)  # ['RESTful and GraphQL API design', ...]

# Agent has tools from YAML
print(agent.tools)  # ['database_query', 'api_test', ...]
```

### Query Available Agents

```python
# List all agents
agents = factory.list_available_agents()
# ['backend-worker', 'backend-architect', 'frontend-specialist',
#  'test-engineer', 'code-reviewer']

# Get capabilities
caps = factory.get_agent_capabilities("test-engineer")
# ['Unit and integration testing', 'Test-driven development (TDD)', ...]

# Filter by type
backend_agents = factory.get_agents_by_type("backend")
# ['backend-worker', 'backend-architect']
```

### Create Custom Agent

1. Create `codeframe/agents/definitions/custom/my-agent.yaml`:

```yaml
name: my-custom-agent
type: custom
maturity: D2
description: "My specialized agent"

capabilities:
  - Custom capability 1
  - Custom capability 2

system_prompt: |
  You are a specialized agent for...

tools:
  - custom_tool
```

2. Use it:

```python
factory = AgentFactory()
agent = factory.create_agent("my-custom-agent", "custom-001", "claude")
```

## Migration Strategy

### No Migration Required
Existing code continues to work as-is. No breaking changes.

### Gradual Adoption (Recommended)

1. **Phase 1**: Use factory for new agent types
   ```python
   # New specialized agents via factory
   reviewer = factory.create_agent("code-reviewer", "review-001", "claude")

   # Keep using BackendWorkerAgent for existing code
   worker = BackendWorkerAgent(...)
   ```

2. **Phase 2**: Migrate new code to factory
   ```python
   # Use factory for all new agent instantiation
   agent = factory.create_agent("backend-worker", "worker-001", "claude")
   ```

3. **Phase 3**: Eventually refactor existing code (optional)
   - Update existing instantiation to use factory
   - Only if beneficial for your use case

## Files Modified/Created

### Created Files
- ✅ `codeframe/agents/factory.py` (AgentFactory)
- ✅ `codeframe/agents/definitions/backend-worker.yaml`
- ✅ `codeframe/agents/definitions/test-engineer.yaml`
- ✅ `codeframe/agents/definitions/code-reviewer.yaml`
- ✅ `tests/test_agent_factory.py` (21 tests)
- ✅ `docs/AGENT_FACTORY_GUIDE.md`
- ✅ `docs/AGENT_FACTORY_SUMMARY.md`

### Modified Files
- ✅ `codeframe/agents/worker_agent.py` (added system_prompt parameter)
- ✅ `codeframe/agents/__init__.py` (added exports)

### Existing Files (Already Present)
- `codeframe/agents/definition_loader.py` (AgentDefinitionLoader)
- `codeframe/agents/definitions/backend-architect.yaml`
- `codeframe/agents/definitions/frontend-specialist.yaml`

## Test Results

```
21 passed in 0.83s

✅ Factory initialization
✅ List available agents
✅ Create backend-worker
✅ Create backend-architect
✅ Create frontend-specialist
✅ Create test-engineer
✅ Create code-reviewer
✅ Get capabilities
✅ Unknown type handling
✅ Custom maturity
✅ Get definition
✅ Get agents by type
✅ BackendWorkerAgent backward compatibility
✅ Agent has system_prompt
✅ Agent has capabilities
✅ Agent has tools
✅ Agent has constraints
✅ Reload definitions
✅ WorkerAgent backward compatibility
✅ WorkerAgent with system_prompt
```

## Benefits

### For Developers

1. **Declarative Configuration**: Define agents in YAML instead of code
2. **Easy Customization**: Create custom agents without modifying core code
3. **Discoverability**: Query available agents and their capabilities
4. **Consistency**: All agents follow same definition schema
5. **Testing**: Rich metadata enables better testing

### For System

1. **Flexibility**: Hot-reload definitions without restart
2. **Extensibility**: Plugin-style agent system
3. **Maintainability**: Separate config from implementation
4. **Type Safety**: Validated schemas prevent errors
5. **Backward Compatible**: Zero breaking changes

## Next Steps (Optional)

Future enhancements could include:

1. **Remote Definitions**: Load definitions from URLs
2. **Template Inheritance**: Extend base agent templates
3. **Auto-Selection**: Match agents to tasks based on capabilities
4. **Dynamic Tools**: Register tool implementations
5. **Agent Composition**: Combine multiple agent definitions

## Summary

✅ **Complete Implementation**
- AgentFactory with full functionality
- 5 agent definitions (backend-worker, backend-architect, frontend-specialist, test-engineer, code-reviewer)
- WorkerAgent enhanced with system_prompt
- 21 comprehensive tests (all passing)
- Full documentation

✅ **100% Backward Compatible**
- Existing code works unchanged
- No breaking changes
- Gradual migration path

✅ **Production Ready**
- Tested and validated
- Documented with examples
- Error handling and validation
