Construct projects are often saved to a single file with the extension .C3p (which stands for "Construct 3 Project"). This file is actually a standard ZIP file...
I've been working on getting AI to understand Construct 3, and made Construct3 Agents Skills
It installs into a Construct folder project as an agent skill. With it, agents write complete event sheets directly, using Construct's native features, and the result opens in the editor like any other project.