You need to use hooks to actually block it from doing things. CLAUDE.md files are just guidance, and it’s not guaranteed to follow everything (and the longer the file gets, the more likely it’ll ignore stuff - it should be kept as short as possible)
Hooks are code that runs at a certain point (eg after you submit a prompt, before a tool call, after a turn, etc) that can do some validation, verification, logging, etc.
It does still try to work around the blocks though, but it’s not as bad as trying to put the restrictions in the prompt.
You need to use hooks to actually block it from doing things. CLAUDE.md files are just guidance, and it’s not guaranteed to follow everything (and the longer the file gets, the more likely it’ll ignore stuff - it should be kept as short as possible)
https://code.claude.com/docs/en/hooks
Hooks are code that runs at a certain point (eg after you submit a prompt, before a tool call, after a turn, etc) that can do some validation, verification, logging, etc.
It does still try to work around the blocks though, but it’s not as bad as trying to put the restrictions in the prompt.