I’m building a small side project called Ganjeolgot.ai. It’s a slow network for quiet letters. No followers. No like counts. No real-time chat. No ads inside the service. People can write how their day actually felt, keep it private, send it to their future self, or let it drift anonymously to someone unknown. Recently, I started thinking about adding a “share” feature. The obvious version was simple: After someone sends a letter, generate a nice image card they can share on Insta...