As a software engineer I do a lot of architecture and process diagrams but I find existing web editors for things like D2 and Mermaid somewhat cumbersome. I was thinking of building a dedicated, native editor.

Some features I'm thinking of:

- autocomplete and macros for faster composition

- wizards for common diagram types

- save diagrams as editable PNGs / editable SVGs

- generate code for git "architecture" repositories

- create themes for diagrams

- offline documentation for language syntax

- generate diagrams from json (nodes / edges lists)

- some form of LLM assistant integration, e.g. to bootstrap diagrams with a prompt

What features would make something like this worth using, to you?