It’s really been advertised heavily lately but I just discovered it a couple weeks ago, and in case you’re unaware the real aha moment with Cursor for me was Composer in Agent mode with Sonnet 3.5.

If you want the highest chance of success, use a reasoning model (o3-mini high, o1 pro, r1, grok 3 thinking mode) to create a detailed outline of how to implement the feature you want, then copy paste that into composer.

It one shots a lot of greenfield stuff.

If you get stuck in a loop on an issue, this prompt I got from twitter tends to work quite well to get you unstuck: "Reflect on 5-7 different possible sources of the problem, distill those down to 1-2 most likely sources, and then add logs to validate your assumptions before we move onto implementing the actual code fix."

Just doing the above gets me through 95% of stuff I try, and then occasionally hopping back out to a reasoning model with the current state of the code, errors, and logs gets me through the last 5%.