Three years ago, I walked into a hackathon at Ctrip with nothing but coffee and anxiety. Forty-eight hours later, we walked out with a gold medal and a working BFF framework that somehow became an open-source project with 36 stars. Sounds like a success story, right? Well, sort of. Let me tell you what actually happened. The Problem That Started It All If you've ever worked on a mobile app backed by multiple microservices, you know the pain. Your frontend team needs data from Service A, Service B, and Service C. Each has different response formats, different authentication, and different error handling. So someone inevitably says, "Let's just add a BFF layer!" And then that BFF layer becomes a monolith in disguise. I've seen this happen at least four times in my career. Each time, the team spends months building a "thin" aggregation layer that ends up being 10,000 lines of spaghetti code. At Ctrip, this problem was amplified.…