Skill Creator brings evals to Claude skills

Skill Creator is a strong signal that agent workflows are maturing from prompt craft into engineering discipline. The big idea is not just skill authoring — it's making reusable AI behavior measurable, comparable, and worth maintaining.

• –Its four modes — Create, Eval, Improve, and Benchmark — cover the full lifecycle from first draft to performance tuning
• –The Executor, Grader, Comparator, and Analyzer agents split evaluation into repeatable roles instead of relying on ad hoc human judgment
• –Benchmark aggregation with variance analysis matters because agentic workflows are noisy; one good run is not enough to trust a skill
• –The public GitHub implementation makes the workflow inspectable and adaptable for teams that want version-controlled skill development inside Claude Code