{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-pdjtz2kl","versions":[{"created_at":"2026-06-22T06:18:37Z","element_count":71,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"82bac07ec8e0508cf8896e4bcfef66892a3fd5a040eeff9f18d5bc79207a9a7b","version":3},{"created_at":"2026-06-22T06:10:29Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c7a175e2cb489f926114b21d7a34b680ddd483352cab801f82211389e6ef493a","version":2},{"created_at":"2026-06-22T06:10:28Z","element_count":134,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}