first-principles-skill

A Claude Code plugin: the 5-phase first-principles methodology plus 11 namespaced skills — 6 companion-tool skills (Five Whys, pre-mortem, trade-off analysis, fishbone, inversion, second-order thinking) and 5 focused-phase skills (identify-essence, challenge-assumptions, ground-truths, reason-upward, validate). Use when reasoning from ground truths rather than analogy or convention.