And you don’t find that Claude cheerfully ignores the content of your CLAUDE.md and does whatever the fuck it wants instead?

I caught it ignoring the prompt’s details, so added “include the output of the Unix ‘date’ command with each response.

And that worked great in that its absence became an indicator that Claude was off-prompt. Until it started including made-up strings that resembled, but had nothing to do with, the output of the Unix ‘date’ command.