​
概述

CrewAI 中的指纹识别提供了一种方法，可以在组件的整个生命周期中对其进行唯一识别和跟踪。每个智能体、团队和任务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。

这些指纹可以用于

  • 审计和跟踪组件使用情况
  • 确保组件身份完整性
  • 向组件附加元数据
  • 创建可追溯的操作链

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指纹识别的工作原理

指纹是 crewai.security 模块中 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，无法手动设置
  • 一个创建时间戳：指纹生成的时间，自动设置，无法手动修改
  • 元数据：一个包含可定制额外信息的字典

指纹在组件创建时自动生成和分配。每个组件通过一个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}")

​
使用指纹元数据

您可以向指纹添加元数据以提供额外上下文

# 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持久且不变。如果您修改组件，指纹保持不变

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，但可以使用 generate 方法和种子来创建确定性指纹

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 {}