While I think the combination of drag-and-drop / blocks and Svelte is really awesome, this unfortunately sits at the wrong end of the spectrum for me.

What is is: a visual website builder where I can customise blocks using an online editor.

What I'd like: an online interface that clients can use to add / change text, or make other small adjustments, for Svelte websites that I build offline using my own tools. The idea would be that, as long as I build the website according to certain interface standards, it is readable by Primo and the client can modify using the visual interface. For any bigger modifications the client would come back to me and I have all the speed and freedom of my offline workflow.

Some might suggest that what I need is a headless CMS, but I have tried those and they are all over-engineered and giving me a big headache just for setup and maintenance.