Which sentence is correct?

I suggest you to add this feature.
I sugget to you to add this feature.

Please provide some examples for both cases if needed.

Question

Which sentence is correct?

I suggest you to add this feature.
I sugget to you to add this feature.

Please provide some examples for both cases if needed.

Answer

If you use the verb "suggest" in this way, it triggers the subjunctive. So neither of your examples is correct. You would need to say:

I suggest that you add this feature.

To avoid triggering the subjunctive, use a different verb:

I think you should add this feature.

Answer

The second one sounds more natural to me but I wouldn’t really use either. I would say:

I suggest that you add this feature.