1. What do you want to call it?

Lowercase, hyphens instead of spaces. This becomes the folder name, which is what you type to run it.

2. What one job does it do?

One job. A skill that tries to do five tends to fire for the wrong one.

3. What do you actually type when you want it?

One phrase per line. Use the literal words you'd type, not a summary of them. This is the single biggest thing that makes a skill fire.

4. What should it stay out of? (optional, but it helps)

Naming what it's not for stops it grabbing work you didn't mean.

The rules every result has to follow

One rule per line. Numbers beat adjectives. "Between 140 and 160 characters" can be checked, "concise" can't.

Where will you save it?

Should it stop and ask when it's unsure?