来自 Manus 的一手分享：如何构建 AI Agent 的上下文工程？

Core Insights - The article emphasizes the importance of context engineering in building AI agents, highlighting that it allows for rapid improvements and adaptability in response to advancements in underlying models [3][33] - Manus has adopted a strategy focused on context engineering, which enables faster iterations and keeps their products aligned with the evolving capabilities of foundational models [3][33] Group 1: Context Engineering Principles - KV cache hit rate is identified as the most critical metric for production-level AI agents, significantly impacting latency and cost [6][7] - The article outlines several key practices to improve KV cache hit rates, including maintaining stable prompt prefixes and ensuring context remains additive rather than modifying previous actions or observations [10][11] - The use of a context-aware state machine to manage tool availability is recommended to prevent inefficient action selection as the action space grows [10][15] Group 2: Handling Context Limitations - The article discusses the challenges of context length in AI agents, noting that while modern LLMs support large context windows, practical limitations often arise [17][19] - Manus treats the file system as an ultimate context, allowing for unlimited capacity and persistent memory, which can be directly manipulated by agents [19][23] Group 3: Attention Management and Error Handling - A unique attention management strategy is employed by Manus, where a todo.md file is created and updated throughout task execution to keep the agent focused on its goals [24][27] - The article advocates for retaining erroneous actions in context to help the model learn from mistakes, thereby improving its adaptability and reducing the likelihood of repeating errors [28][31] Group 4: Avoiding Few-Shot Pitfalls - Few-shot prompting can lead to undesirable outcomes in agent systems, as models may overly rely on repetitive patterns from similar action-observation pairs [32] - Introducing controlled randomness in actions and observations is suggested to break fixed patterns and enhance model attention [32] Conclusion - Context engineering is presented as an emerging discipline essential for AI agent systems, influencing their speed, recovery capabilities, and scalability [33][34]