You heavily implied it, because you made no mention of being detected, challenged, or shot at. Also, having FTL'd out of the system before I could respond, you've sort of made it all a moot point. Just, talk to me next time, hell I would've given you a detailed breakdown of Corinthene's defences and how to elude them. 


On a general note, it's s not that nobody has developed cloaking tech, it's that with every tech, a counter tech soon emerges. Cloaking could be widespread, but so would countermeasures.