Anthropic 提示词指南：如何让 Claude Fable 5.2 重构代码
Quoting Prompting Claude Fable 5.2
Simon Willison 引用 Anthropic 文档：Claude Fable 5.2 对提示词中关于代码归属的表述很敏感。在小型编码任务测试中，若提示词不提及归属或把代码库说成他人的，模型倾向于沿既有结构追加代码，即使造成重复；而加上 "This codebase is yours" 这句话后，模型约一半的尝试会合并重复代码，不加则不到十分之一。
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