评估 CrewAI 的用例

# Example: Research Crew for market analysis
from crewai import Agent, Crew, Process, Task

# Create specialized agents
researcher = Agent(
    role="Market Research Specialist",
    goal="Find comprehensive market data on emerging technologies",
    backstory="You are an expert at discovering market trends and gathering data."
)

analyst = Agent(
    role="Market Analyst",
    goal="Analyze market data and identify key opportunities",
    backstory="You excel at interpreting market data and spotting valuable insights."
)

# Define their tasks
research_task = Task(
    description="Research the current market landscape for AI-powered healthcare solutions",
    expected_output="Comprehensive market data including key players, market size, and growth trends",
    agent=researcher
)

analysis_task = Task(
    description="Analyze the market data and identify the top 3 investment opportunities",
    expected_output="Analysis report with 3 recommended investment opportunities and rationale",
    agent=analyst,
    context=[research_task]
)

# Create the crew
market_analysis_crew = Crew(
    agents=[researcher, analyst],
    tasks=[research_task, analysis_task],
    process=Process.sequential,
    verbose=True
)

# Run the crew
result = market_analysis_crew.kickoff()

# Example: Customer Support Flow with structured processing
from crewai.flow.flow import Flow, listen, router, start
from pydantic import BaseModel
from typing import List, Dict

# Define structured state
class SupportTicketState(BaseModel):
    ticket_id: str = ""
    customer_name: str = ""
    issue_description: str = ""
    category: str = ""
    priority: str = "medium"
    resolution: str = ""
    satisfaction_score: int = 0

class CustomerSupportFlow(Flow[SupportTicketState]):
    @start()
    def receive_ticket(self):
        # In a real app, this might come from an API
        self.state.ticket_id = "TKT-12345"
        self.state.customer_name = "Alex Johnson"
        self.state.issue_description = "Unable to access premium features after payment"
        return "Ticket received"

    @listen(receive_ticket)
    def categorize_ticket(self, _):
        # Use a direct LLM call for categorization
        from crewai import LLM
        llm = LLM(model="openai/gpt-4o-mini")

        prompt = f"""
        Categorize the following customer support issue into one of these categories:
        - Billing
        - Account Access
        - Technical Issue
        - Feature Request
        - Other

        Issue: {self.state.issue_description}

        Return only the category name.
        """

        self.state.category = llm.call(prompt).strip()
        return self.state.category

    @router(categorize_ticket)
    def route_by_category(self, category):
        # Route to different handlers based on category
        return category.lower().replace(" ", "_")

    @listen("billing")
    def handle_billing_issue(self):
        # Handle billing-specific logic
        self.state.priority = "high"
        # More billing-specific processing...
        return "Billing issue handled"

    @listen("account_access")
    def handle_access_issue(self):
        # Handle access-specific logic
        self.state.priority = "high"
        # More access-specific processing...
        return "Access issue handled"

    # Additional category handlers...

    @listen("billing", "account_access", "technical_issue", "feature_request", "other")
    def resolve_ticket(self, resolution_info):
        # Final resolution step
        self.state.resolution = f"Issue resolved: {resolution_info}"
        return self.state.resolution

# Run the flow
support_flow = CustomerSupportFlow()
result = support_flow.kickoff()

# Example: Content Production Pipeline combining Crews and Flows
from crewai.flow.flow import Flow, listen, start
from crewai import Agent, Crew, Process, Task
from pydantic import BaseModel
from typing import List, Dict

class ContentState(BaseModel):
    topic: str = ""
    target_audience: str = ""
    content_type: str = ""
    outline: Dict = {}
    draft_content: str = ""
    final_content: str = ""
    seo_score: int = 0

class ContentProductionFlow(Flow[ContentState]):
    @start()
    def initialize_project(self):
        # Set initial parameters
        self.state.topic = "Sustainable Investing"
        self.state.target_audience = "Millennial Investors"
        self.state.content_type = "Blog Post"
        return "Project initialized"

    @listen(initialize_project)
    def create_outline(self, _):
        # Use a research crew to create an outline
        researcher = Agent(
            role="Content Researcher",
            goal=f"Research {self.state.topic} for {self.state.target_audience}",
            backstory="You are an expert researcher with deep knowledge of content creation."
        )

        outliner = Agent(
            role="Content Strategist",
            goal=f"Create an engaging outline for a {self.state.content_type}",
            backstory="You excel at structuring content for maximum engagement."
        )

        research_task = Task(
            description=f"Research {self.state.topic} focusing on what would interest {self.state.target_audience}",
            expected_output="Comprehensive research notes with key points and statistics",
            agent=researcher
        )

        outline_task = Task(
            description=f"Create an outline for a {self.state.content_type} about {self.state.topic}",
            expected_output="Detailed content outline with sections and key points",
            agent=outliner,
            context=[research_task]
        )

        outline_crew = Crew(
            agents=[researcher, outliner],
            tasks=[research_task, outline_task],
            process=Process.sequential,
            verbose=True
        )

        # Run the crew and store the result
        result = outline_crew.kickoff()

        # Parse the outline (in a real app, you might use a more robust parsing approach)
        import json
        try:
            self.state.outline = json.loads(result.raw)
        except:
            # Fallback if not valid JSON
            self.state.outline = {"sections": result.raw}

        return "Outline created"

    @listen(create_outline)
    def write_content(self, _):
        # Use a writing crew to create the content
        writer = Agent(
            role="Content Writer",
            goal=f"Write engaging content for {self.state.target_audience}",
            backstory="You are a skilled writer who creates compelling content."
        )

        editor = Agent(
            role="Content Editor",
            goal="Ensure content is polished, accurate, and engaging",
            backstory="You have a keen eye for detail and a talent for improving content."
        )

        writing_task = Task(
            description=f"Write a {self.state.content_type} about {self.state.topic} following this outline: {self.state.outline}",
            expected_output="Complete draft content in markdown format",
            agent=writer
        )

        editing_task = Task(
            description="Edit and improve the draft content for clarity, engagement, and accuracy",
            expected_output="Polished final content in markdown format",
            agent=editor,
            context=[writing_task]
        )

        writing_crew = Crew(
            agents=[writer, editor],
            tasks=[writing_task, editing_task],
            process=Process.sequential,
            verbose=True
        )

        # Run the crew and store the result
        result = writing_crew.kickoff()
        self.state.final_content = result.raw

        return "Content created"

    @listen(write_content)
    def optimize_for_seo(self, _):
        # Use a direct LLM call for SEO optimization
        from crewai import LLM
        llm = LLM(model="openai/gpt-4o-mini")

        prompt = f"""
        Analyze this content for SEO effectiveness for the keyword "{self.state.topic}".
        Rate it on a scale of 1-100 and provide 3 specific recommendations for improvement.

        Content: {self.state.final_content[:1000]}... (truncated for brevity)

        Format your response as JSON with the following structure:
        {{
            "score": 85,
            "recommendations": [
                "Recommendation 1",
                "Recommendation 2",
                "Recommendation 3"
            ]
        }}
        """

        seo_analysis = llm.call(prompt)

        # Parse the SEO analysis
        import json
        try:
            analysis = json.loads(seo_analysis)
            self.state.seo_score = analysis.get("score", 0)
            return analysis
        except:
            self.state.seo_score = 50
            return {"score": 50, "recommendations": ["Unable to parse SEO analysis"]}

# Run the flow
content_flow = ContentProductionFlow()
result = content_flow.kickoff()