Claude 3.7 in Cursor is eager – sometimes a bit too eager

I do not use cursor but tried other agentic integrations (including claude-code) and see nothing resembling this issue.

my guess would be in cursor they wanted to force models to be much more defensive because they kept forgetting about error handling etc. but Claude 3.7 is just good enough ootb and that extra nudge is too much

For some reason, it started ignoring my rules - both in old .cursorrules and new .cursor/rules. I mean, even blunt ones like (in Python) "never ever import Dict, use dict instead".

I'm unsure if it is Claude 3.7 or a recent Cursor update. Yes, in cursor settings I have rules switched on.

That depends on the prompt injections (for good or ill) Cursor IDE is making along the way.