Changes in the system prompt between Claude Opus 4.6 and 4.7]

Changes in the system prompt between Claude Opus 4.6 and 4.7]

Source

Originally published on hacker news.

Read the full article: [Changes in the system prompt between Claude Opus 4.6 and 4.7]](https://simonwillison.net/2026/Apr/18/opus-system-prompt/)