The capital letter thing is weird, but it's pretty common. The Claude 4 system prompt uses capital letters for emphasis in a few places, eg https://simonwilliso

The capital letter thing is weird, but it's pretty common. The Claude 4 system prompt uses capital letters for emphasis in a few places, eg https://simonwillison.net/2025/May/25/claude-4-system-prompt/#seriously-don-t-regurgitate-copyrighted-content https://simonwillison.net/2025/May/25/claude-4-system-prompt...