Anthropic 文档：提示词声明代码归属可影响 Claude Fable 5.2 重构行为
Quoting Prompting Claude Fable 5.2
Anthropic 文档指出，Claude Fable 5.2 会依据提示词中关于代码归属的表述调整行为。在小规模编码任务测试中，若提示词未提及归属或把代码库说成他人的，模型倾向于沿用现有结构，即使这会重复已有代码；若明确声明代码属于模型自己，模型在约一半尝试中合并了重复代码，而没有这句话时这一比例不到十分之一。
10th November 2026
Claude Fable 5.2 responds closely to what the prompt says about who owns the code it works on. In Anthropic’s testing on small coding tasks, when a prompt said nothing about ownership or presented the code base as someone else’s, the model tended to add to the existing structure, even when that repeated existing code. [...]
If you want the model to improve the structure as it works, say that the code is its own:
This codebase is yours: what it's for and how it's built are your call, and you'll keep building on it.In Anthropic’s testing on small coding tasks, the model merged repeated code in about half of the tries with this sentence, and in under a tenth of the tries without it.
— Prompting Claude Fable 5.2, Anthropic documentation
来源：Simon Willison · simonwillison.net