You maintain a repository with three loosely related service modules, each in its own subdirectory with distinct build steps and environment variables. Leadership wants a top-level README that explains the overall architecture and how the modules interact. You open Copilot Chat and type '/doc' with only the root package.json in the active editor. The generated README describes the root project generically but says nothing about how the three services communicate or their individual setup steps. What is the most effective way to improve the result?