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wiki/concepts/Multi-Agent-Consensus.md
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wiki/concepts/Multi-Agent-Consensus.md
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title: "Multi-Agent Consensus"
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type: concept
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tags: [multi-agent, architecture, reliability, voting]
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last_updated: 2026-04-15
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---
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## Definition
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一种多智能体架构模式,通过多数投票提高输出可靠性。核心思想:用"相信大多数"替代"相信第一反应"。
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## How It Works
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1. 生成 N 个独立 LLM 实例(最好使用不同模型)
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2. 分散任务(Fan out):给所有 Agent 相同任务
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3. 收集结果(Fan in):选择最常见的答案
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## Reliability Math
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- 单个模型幻觉率:20%
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- 3个模型同时幻觉相同谎言概率:0.2³ = 0.8%
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## Key Requirements
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- **多样性**:Agent 应使用不同模型,减少同质化噪声放大
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- **盲测原则**:Agent 之间不能有反馈回路,否则产生 Groupthink 和从众效应
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- **无干扰**:独立运行,类似盲测实验
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## Trade-offs
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- **优点**:显著降低幻觉概率,适合事实核查和分类任务
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- **缺点**:成本高(同一任务 N 次执行),ROI 取决于任务失败成本
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## Best For
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- 事实核查("这封邮件是垃圾邮件吗?")
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- 分类任务
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- 高可靠性要求的输出验证
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## Related Concepts
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- [[Multi-Agent-Hierarchy]]:另一种多 Agent 协作模式
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- [[Multi-Agent-Adversarial-Debate]]:对抗式架构
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- [[Multi-Agent-Knock-out]]:淘汰制架构
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