Open Source Project (No.73): Sub2API - All-in-One Claude/OpenAI/Gemini Subscription-to-API Relay

Introduction "Fluidize your AI subscription quotas and maximize the value of every penny." This is the No.73 article in the "One Open Source Project per Day" series. Today, we are exploring Sub2API (also known as CRS2). With the rise of native AI power-tools like Claude Code and GitHub Copilot, many developers find themselves with multiple AI subscriptions (such as Claude Pro or OpenAI Plus). However, these subscriptions often come with usage limits or idle quotas. How can you consolidate these