Cursor beginners usually struggle with when to use which AI mode in...

- There are 3 different AI modes in Cursor relevant for beginners: Chat, Composer, Agent (I won't talk about other Cursor AI features like Tab and CMD+K, since those are more for pros).
- AI Chat was released first, then Composer, then Agent
- Toggle the AI pane on the right to open Chat. Use CMD+I to open Composer. Toggle for Agent.
I think of the AI Chat as an assistant. It's more hands-off and does not directly modify your code.
It's good for:
- EXPLANATIONS: Explain which parts of your code does what, or what steps to take to implement a new feature
- Code ITERATIONS: Whenever you're editing code and want to be very precise in what you're editing (which is most of the times tbh)
The main difference to Composer is that Agent has better contextual awareness and can execute terminal commands.
This means:
- Same use cases as Composer (setup & speed)
- Tbh Agent is just a better version of Composer, so imo there's no more big reason to use Composer now
- When you're building and iterating on a project, it makes a lot of sense to use Chat, so that you can be precise and produce code that works
- When you need speed and a lot of contextual awareness, use Agent.
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