This post was created with AI assistance and reviewed for accuracy before publishing.
Cursor can use project rules and documentation to steer behavior. Exact file names and mechanisms evolve; check Cursor documentation for the current layout (for example rules in .cursor or legacy .cursorrules patterns).
What to put in rules
Short, enforceable bullets beat long essays: stack versions, test commands, “no new dependencies without approval,” and naming conventions. Link to internal architecture notes rather than duplicating them badly.
Ground truth
The model only knows what you give it. If README is wrong, the assistant will confidently follow it. Invest in accurate onboarding docs for humans and models alike.
Practical takeaway
Review rules when you upgrade frameworks. Stale rules are worse than none.
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