building-effective-skills

Meta-skill for building Claude skills that measurably improve output. Gather canonical docs (pith) -> detect where the model drops the ball one-shot AND multi-turn -> distill only the gap -> validate with a blind 4-cell benchmark and a multi-turn drift test. Use when creating/improving a skill, turning docs into a skill, or deciding whether a skill is worth building. Proven: a skill prevented multi-turn drift 13-0 across two stacks.