Claude’s new system prompt really doesn’t want to reproduce song lyrics

Europe Culture Mon, 07 Sep 2026 09:13:07 GMT Moderate confidence — 64/100

2nd September 2026 Anthropic publish the system prompts for their Claude consumer applications (Claude.ai and the Claude mobile apps—sadly not for Claude Cowork or Claude Code).
I love that they do this, and that they share not just the current prompts but historic changes to their prompts as well.

Unverified

2nd September 2026 Anthropic publish the system prompts for their Claude consumer applications (Claude.ai and the Claude mobile apps—sadly not for Claude Cowork or Claude Code).
I love that they do this, and that they share not just the current prompts but historic changes to their prompts as well.

Sources: Simonwillison