Japanese law firm plugin for Claude Code — court template filling, family tree generation (相続関係説明図), legal document proofreading, lawsuit analysis, e-Gov law search, and deterministic legal calculators (traffic damages, child support, debt recalc, overtime, iryubun, property division, inheritance). Ships HMAC-chainedtamper-evident local audit logs (append-only JSONL with optional HMAC keying) recording which documents were processed, when, by which skill — without storing document contents. 日本の法律事務所向け Claude Code プラグイン — 裁判所書式入力・相続関係説明図・訴訟分析・法令検索・決定論的計算（交通事故・養育費・遺留分等）。