From 48k lines of code to 10—the story of GitHub's JavaScript SDK

This post details the significant refactoring of the GitHub JavaScript SDK (`@octokit/rest`). It describes the transition from a monolithic 16k LOC library to a decomposed architecture using plugins and smaller modules like `@octokit/endpoint`, `@octokit/request`, and `@octokit/core`. Key technical contributions include automating API route definitions by scraping documentation, introducing a plugin API for extensibility, and leveraging TypeScript to replace runtime validation, leading to a drastic reduction in code size and improved maintainability. The post also outlines the strategy for future decomposition and the adoption of `@octokit/core` as the new foundation.