Trying to do this in Meta-Bind in Obsidian

1. Have a Meta-Bind button (eg in a template) that…
2. Prompts the user for a text (string)…
3. (optionally convert that text to ALL CAPS)
4. …add that name to a List (YAML) Property, while NOT replacing the optionally present list of texts.

Seems basic, but I can find no obvious example.