Claude's system prompt changed between 4.6 and 4.7. Here's why I don't care.

Simon Willison published a detailed analysis of the differences between Claude Opus 4.6 and 4.7's system prompts. It's on Hacker News right now with 158+ points. The changes are real and significant. The model behaves differently. Prompts that worked on 4.6 may not work the same way on 4.7. And I genuinely don't care. Here's why.