After months of daily Claude Code use, I noticed my sessions had settled into a rut: describe a problem, get code, tweak it, repeat. Fast, but narrow. I wanted to know which collaboration behaviors I was skipping entirely — not just vibes, but against something measurable. Anthropic published a study in February (9,830 Claude conversations) that classifies 11 observable behaviors across three axes — Description, Discernment, Delegation. I built skill-tree to run that same classification on yo...