Simple Shortcodes Extension

What is the best approach to easy, simple short-codes in sage?

The mantra “Keep functionality out of the theme” keeps coming to mind.

In the past, I wouldn’t think beyond a second of where to program that into the theme. But now I’m a bit gunshy. Thoughts? How would you guys best take care of this?

Bonus: Mention your favorite X-Men Character in your reply. Tell me why.

Keep 'em out of the theme — create a mu-plugin or a regular plugin

Must be early for me. For some reason doing my own custom plugin didn’t cross my mind. I’ll probably make a plugin called Custom Extensions or something.

Thanks. Didn’t really want to go download a big-bulky-heavy-weight plugin just to handle something as simple as a button-shortode.