Writing — Philippos Tsamantanis https://tsamart.com/writing/ Longer pieces about agent skills, Claude Code, and the things he builds. en A blind test for agent skills https://tsamart.com/writing/skill-arena/ https://tsamart.com/writing/skill-arena/ Tue, 22 Sep 2026 00:00:00 GMT Skill Arena runs the same prompt with and without an agent skill and makes you vote before it tells you which was which. Notes on building it, and on the cat.