Axiom \u2014 First-Principles Assumption Auditor / \u7b2c\u4e00\u6027\u539f\u7406\u62c6\u89e3\u5668 workflow skill. Use this skill when the user needs First-principles assumption auditor. Classifies each hidden assumption (fact / convention / belief / interest-driven), ranks by fragility \u00d7 impact, and rebuilds conclusions from verified premises. Bilingual: auto-detects Chinese or English and the operator should preserve the upstream workflow, copied support files, and provenance before merging or handing off.