Building a High-Availability AI Application from Scratch: A Case Study of Intelligent Document Summarization

As an AI application architect, I often receive consultations from independent developers and small technical teams. The dilemmas everyone faces are often strikingly similar: holding a handful of API Keys, watching the ever-changing models on Hugging Face, yet struggling when it comes to actually landing a stable commercial application.

Today, using a highly representative scenario—the "Intelligent Document Summarization System"—as an example, we will break down how to build a high-availability, low-maintenance AI application from scratch. This scenario is perfect for independent developers as an entry point because it has clear