Weber Wong’s “artifact thinking“ names the problem: creative work that produces one-off outputs, each beginning from scratch. Prompts are artifacts. Skills are not.

Nick Babich, following up his earlier roundup of Claude skills, looks at Anthropic’s skill-creator, a meta-skill that generates and evaluates new skills. His framing of what a skill actually is:

Many people explain the role of a skill as a set of instructions that Claude automatically activates for a particular task. While this is a correct way to describe its behavior, it’s better to think of a skill as a recipe. Just like when we cook something, we rely on a recipe to do the job correctly, Claude will rely on a dedicated skill.

Recipes compound. You refine them, share them, adapt them for new contexts. Prompts are disposable. Skills persist.

And now skills can write other skills. Babich walks through the full skill-creator setup, and the most interesting detail is the self-evaluation loop:

The great thing about Skill Creator is that it triggers a process that evaluates the quality of output a newly created skill will produce. This evaluation is exactly what helps you achieve better results with your skill.

Worth following along if you’re building your own. (And you should be!)