Thanks for sharing.
I was personally not motivated/good enough to write a new tool so I've wrote scripts to use rofi (easily adaptable to dmenu) as:

• an app launcher
• a clipboard manager
• an infobar to show things like the date/time, memory usage, disk space, battery level, wifi signal…
• an omnibar to perform an internet search, quick units conversions
• a calculator for simple math
• a bookmark manager (list, open, edit, add, remove)
• a password/2FA token manager (list, edit, add, remove, autofill internet fields)
• a wifi manager
• a vpn manager

I've explained the basis here if you're curious. Even though I was bad at keeping my code up to date you may get some ideas to expand your program.

Superficial feedback but I can't read more than 3 lines without syntax highlighting. Here I believe lines short for the text but makes code even harder to read due to new line. Maybe Codeberg allows for HTML embedding.

Now for a comment on the content itself, how is that different from aliases in ~/.bashrc? I personally have a bunch of commands that are basically wrapped or shortcuts around existing ones with my default parameters.

Finally, if the result is visual, like dmenu which I only use a bit in the PinePhone, then please start by sharing a screenshot of the result.

Anyway, thanks for sharing, always exciting to learn from others how they make THEIR systems theirs!