Codespaces

How GitHub Codespaces Uses Core-Hours, Port Forwarding, and CI

A GitHub Codespace is a development machine running in the cloud, not a CI runner with an editor attached. It stays interactive while a developer edits files, runs commands, starts servers, debugs processes, and commits changes. That distinction explains three behaviors that are easy to confuse: how compute quota is measured, how localhost becomes reachable from a browser, and where CI begins after code is pushed. Core-hours measure machine capacity multiplied by active time Codespaces compute usage is measured in core-hours. The accounting model is straightforward: