Can a newbie really vibe code an app? I tried Cursor and Replit to find out

I'm not a programmer, but I tried four vibe coding tools to see if I could build anything at all on my own. Here's what I did and did not accomplish.
GitHub

Repo for common diagrams we use in Engineering discussions with clients. Most are created with draw.io or with plantuml in VSCode or another IDE. Feel free to create your own ...

In this diagram, the client initiates the TCP connection by sending a SYN packet to the server. The server responds with a SYN+ACK packet, indicating its willingness to establish a connection. Finally ...
GitHub

delphi-game-engine

Cross-platform (desktop, mobile, console, web) 3D and 2D game engine. Powerful visual editor. Support for glTF, X3D, IFC and more. Fast clean code using modern Pascal. Free and open-source.