The web app system prompts are published publicly by Anthropic: https://platform.claude.com/docs/en/release-notes/system-prompts https://platform.claude.com/doc

The web app system prompts are published publicly by Anthropic: https://platform.claude.com/docs/en/release-notes/system-prompts https://platform.claude.com/docs/en/release-notes/system-pro... Interestingly, doesn't include the text in TFA (doesn't cover copyright at all). Not sure if hallucinated or referring to a system prompt at another layer.