Agent-Skills

Don't Ship Agent Skills Without Evals: Philipp Schmid's Testing Method and SkillsBench

• whackur
• Ai
• July 18, 2026

If you use a coding agent like Claude Code, Gemini CLI, or Codex, you eventually end up writing skills: Markdown files that hand the agent your team’s coding conventions, a specific SDK’s usage patterns, or a deployment procedure. The problem is that almost nobody tests them. We would never ship code without tests, yet skills, which directly change how an agent behaves, get shipped after a few manual runs and a gut-level “looks fine.”