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概述

CrewAI 中的指纹识别提供了一种在组件整个生命周期中唯一识别和跟踪组件的方法。每个 Agent、Crew 和 Task 在创建时都会自动获得一个唯一的指纹，该指纹不能手动覆盖。 这些指纹可用于：
  • 审计和跟踪组件使用情况
  • 确保组件身份完整性
  • 将元数据附加到组件
  • 创建可追溯的操作链

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指纹的工作原理

指纹是来自 crewai.security 模块的 Fingerprint 类的一个实例。每个指纹包含
  • 一个 UUID 字符串：组件的唯一标识符，自动生成，不能手动设置
  • 一个创建时间戳：指纹生成的时间，自动设置，不能手动修改
  • 元数据：可以自定义的附加信息字典
指纹在组件创建时自动生成和分配。每个组件通过只读属性公开其指纹。

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基本用法

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访问指纹

from crewai import Agent, Crew, Task

# Create components - fingerprints are automatically generated
agent = Agent(
    role="Data Scientist",
    goal="Analyze data",
    backstory="Expert in data analysis"
)

crew = Crew(
    agents=[agent],
    tasks=[]
)

task = Task(
    description="Analyze customer data",
    expected_output="Insights from data analysis",
    agent=agent
)

# Access the fingerprints
agent_fingerprint = agent.fingerprint
crew_fingerprint = crew.fingerprint
task_fingerprint = task.fingerprint

# Print the UUID strings
print(f"Agent fingerprint: {agent_fingerprint.uuid_str}")
print(f"Crew fingerprint: {crew_fingerprint.uuid_str}")
print(f"Task fingerprint: {task_fingerprint.uuid_str}")

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使用指纹元数据

您可以向指纹添加元数据以获取额外上下文 
# Add metadata to the agent's fingerprint
agent.security_config.fingerprint.metadata = {
    "version": "1.0",
    "department": "Data Science",
    "project": "Customer Analysis"
}

# Access the metadata
print(f"Agent metadata: {agent.fingerprint.metadata}")

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指纹持久性

指纹旨在在组件的整个生命周期中保持不变。如果您修改组件，指纹仍然相同 
original_fingerprint = agent.fingerprint.uuid_str

# Modify the agent
agent.goal = "New goal for analysis"

# The fingerprint remains unchanged
assert agent.fingerprint.uuid_str == original_fingerprint

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确定性指纹

虽然您不能直接设置 UUID 和创建时间戳，但您可以使用 generate 方法和种子创建确定性指纹 
from crewai.security import Fingerprint

# Create a deterministic fingerprint using a seed string
deterministic_fingerprint = Fingerprint.generate(seed="my-agent-id")

# The same seed always produces the same fingerprint
same_fingerprint = Fingerprint.generate(seed="my-agent-id")
assert deterministic_fingerprint.uuid_str == same_fingerprint.uuid_str

# You can also set metadata
custom_fingerprint = Fingerprint.generate(
    seed="my-agent-id",
    metadata={"version": "1.0"}
)

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高级用法

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指纹结构

每个指纹都具有以下结构 
from crewai.security import Fingerprint

fingerprint = agent.fingerprint

# UUID string - the unique identifier (auto-generated)
uuid_str = fingerprint.uuid_str  # e.g., "123e4567-e89b-12d3-a456-426614174000"

# Creation timestamp (auto-generated)
created_at = fingerprint.created_at  # A datetime object

# Metadata - for additional information (can be customized)
metadata = fingerprint.metadata  # A dictionary, defaults to {}