Anthropics February 2026 AI Fluency Index studied 9,830 Claude conversations and classified 11 observable behaviors across three axes: Description, Discernment, and Delegation. I read it and immediately wanted to know where my own sessions landed — not the population, mine. skill-tree does exactly that. Install it in Claude Code, run it, and it classifies your session history against the same 11-behavior taxonomy from Dakan & Feller's 4D AI Fluency Framework. You get a visualization showing which behaviors show up in your work and — more usefully — which ones you've never touched. The output is a character archetype card rendered as a tarot card with museum art, served at a stable URL from Fly.io. Seven possible archetypes. Mine was Illuminator; you can see what the card format looks like at skill-tree-ai.fly.dev/fixture/illuminator. The part I actually use day-to-day: a growth quest.…