Skill audit report

mc-case-studies Audit report.

The corpus layer (语料层) - how real recordings are made to testify for or against the textbook rules. Covers the reverse ARR-SPEC as the unit of the corpus, the corroboration table that turns rules times corpus into hit rates and tiers them as strong rule / tendency / not a rule, the two honesty constraints that keep the table from being circular, why naturally sampled corpora beat curated ones, what this corpus can and cannot measure, and how to look up a worked example. Use when checking whether a rule actually holds in real music, when adding a rule, when a rule and the data disagree, when annotating a track, or when you need a real-world example of a technique. 语料、佐证、命中率、实测 ARR-SPEC、反向规格、案例拆解、规则验证。