This is similar to Language Server Protocol, except for debuggers.

It would be nice if Qt Creator supported it, so it could drive debuggers for languages that it currently does not support first-party.

Overview: https://microsoft.github.io/debug-adapter-protocol/overview
Spec: https://microsoft.github.io/debug-adapter-protocol/specification

Apache-licensed open-source C++ SDK for creating a DAP server or client: https://github.com/google/cppdap