Inside a live codebase, not a blank page.
Before touching anything, I set the project up locally with a full copy of the database, so every change could be tested against real content. The first finding explained most of the frustration: the live site was running an older build of the editor, which is why bold was the only formatting that worked.
I then took over deployments with a scoped server user. Every phase went on its own feature branch and into a pull request that the client's tech lead reviewed and merged. I built it on the server, restarted it and checked it live on desktop and phone before calling it done.






